@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap");

/* =====================================================
   QuizOrbit - Global Theme Stylesheet
   Single stylesheet for entire application
   NO inline styles, NO page-specific CSS allowed
   Corporate, clean, modern, premium blue-based design
   ===================================================== */

/* =====================================================
   CSS VARIABLES (ROOT)
   ===================================================== */
:root {
  /* Primary Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-primary-light: #3b82f6;
  --color-primary-lighter: #dbeafe;

  /* Secondary Colors */
  --color-secondary: #64748b;
  --color-secondary-dark: #475569;
  --color-secondary-light: #94a3b8;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-error: #ef4444;
  --color-error-light: #fee2e2;
  --color-info: #06b6d4;
  --color-info-light: #cffafe;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --color-black: #000000;

  /* Spacing Scale */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem; /* 8px */
  --spacing-md: 1rem; /* 16px */
  --spacing-lg: 1.5rem; /* 24px */
  --spacing-xl: 2rem; /* 32px */
  --spacing-2xl: 3rem; /* 48px */
  --spacing-3xl: 4rem; /* 64px */

  /* Font Families */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Courier New", Courier, monospace;

  /* Font Sizes */
  --font-xs: 0.75rem; /* 12px */
  --font-sm: 0.875rem; /* 14px */
  --font-base: 1rem; /* 16px */
  --font-lg: 1.125rem; /* 18px */
  --font-xl: 1.25rem; /* 20px */
  --font-2xl: 1.5rem; /* 24px */
  --font-3xl: 1.875rem; /* 30px */
  --font-4xl: 2.25rem; /* 36px */

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.5rem; /* 8px */
  --radius-lg: 0.75rem; /* 12px */
  --radius-xl: 1rem; /* 16px */
  --radius-2xl: 1.5rem; /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:
    0 1px 3px 0 rgba(37, 99, 235, 0.06), 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md:
    0 4px 12px -2px rgba(37, 99, 235, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 24px -4px rgba(37, 99, 235, 0.12), 0 4px 8px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl:
    0 24px 48px -8px rgba(37, 99, 235, 0.18),
    0 12px 20px -6px rgba(0, 0, 0, 0.08);
  --shadow-primary: 0 4px 14px 0 rgba(37, 99, 235, 0.4);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* Layout */
  --container-max-width: 1280px;
  --sidebar-width: 260px;
  --topbar-height: 64px;

  /* =====================================================
     Legacy Compatibility Layer (temporary)
     Keep legacy variable names working while refactor completes.
     ===================================================== */
  --primary-color: var(--color-primary);
  --secondary-color: var(--color-secondary);
  --success-color: var(--color-success);
  --warning-color: var(--color-warning);
  --error-color: var(--color-error);
  --info-color: var(--color-info);
  --border-color: var(--color-gray-200);
  --text-muted: var(--color-gray-600);
  --color-text-muted: var(--color-gray-600);

  /* Surface / layout tokens */
  --color-page-bg: #f0f5fb;
  --color-surface: #ffffff;
  --color-border-subtle: rgba(37, 99, 235, 0.08);
}

/* =====================================================
   RESET & BASE STYLES
   ===================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

::selection {
  background: rgba(37, 99, 235, 0.13);
  color: inherit;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(37, 99, 235, 0.18); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(37, 99, 235, 0.36); }

body {
  font-family: var(--font-primary);
  font-size: var(--font-base);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-page-bg);
  min-height: 100vh;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-4xl);
}
h2 {
  font-size: var(--font-3xl);
}
h3 {
  font-size: var(--font-2xl);
}
h4 {
  font-size: var(--font-xl);
}
h5 {
  font-size: var(--font-lg);
}
h6 {
  font-size: var(--font-base);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

strong,
b {
  font-weight: 600;
}

small {
  font-size: var(--font-sm);
}

/* =====================================================
   LAYOUT SYSTEM
   ===================================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-lg);
}

/* Main Layout Wrapper */
.layout-wrapper {
  display: flex;
  min-height: 100vh;
}

.layout-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-normal);
  min-width: 0;
  overflow-x: hidden;
}

.layout-main.no-sidebar {
  margin-left: 0;
}

.layout-content {
  flex: 1;
  padding: var(--spacing-xl);
  margin-top: var(--topbar-height);
  animation: contentFadeIn 0.22s ease-out both;
}

/* Grid System */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-md) * -0.5);
}

.col {
  flex: 1;
  padding: 0 calc(var(--spacing-md) * 0.5);
}

.col-1 {
  flex: 0 0 8.333333%;
  max-width: 8.333333%;
}
.col-2 {
  flex: 0 0 16.666667%;
  max-width: 16.666667%;
}
.col-3 {
  flex: 0 0 25%;
  max-width: 25%;
}
.col-4 {
  flex: 0 0 33.333333%;
  max-width: 33.333333%;
}
.col-5 {
  flex: 0 0 41.666667%;
  max-width: 41.666667%;
}
.col-6 {
  flex: 0 0 50%;
  max-width: 50%;
}
.col-7 {
  flex: 0 0 58.333333%;
  max-width: 58.333333%;
}
.col-8 {
  flex: 0 0 66.666667%;
  max-width: 66.666667%;
}
.col-9 {
  flex: 0 0 75%;
  max-width: 75%;
}
.col-10 {
  flex: 0 0 83.333333%;
  max-width: 83.333333%;
}
.col-11 {
  flex: 0 0 91.666667%;
  max-width: 91.666667%;
}
.col-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

/* =====================================================
   TOPBAR (HEADER)
   ===================================================== */
.topbar {
  position: fixed;
  top: 0;
  right: 0;
  left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  height: var(--topbar-height);
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
  box-shadow: 0 1px 0 rgba(37, 99, 235, 0.06), 0 2px 10px rgba(0, 0, 0, 0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-xl);
  z-index: var(--z-fixed);
  overflow: visible;
  transition:
    left var(--transition-normal),
    width var(--transition-normal);
}

.topbar.no-sidebar {
  left: 0;
  width: 100%;
}

.app-container.sidebar-collapsed .topbar {
  left: 0;
  width: 100%;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.sidebar-toggle {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-gray-700);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.sidebar-toggle:hover {
  background-color: var(--color-gray-100);
}

.topbar-title {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin: 0;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  position: relative;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  position: relative;
}

.topbar-user:hover {
  background-color: var(--color-gray-100);
}

.topbar-user-avatar,
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #3b82f6, #818cf8);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-sm);
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.4);
}

.topbar-user-info,
.user-info {
  display: flex;
  flex-direction: column;
}

.topbar-user-name,
.user-name {
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--color-gray-900);
}

.topbar-user-role,
.user-role {
  font-size: var(--font-xs);
  color: var(--color-gray-500);
}

.dropdown-arrow {
  margin-left: var(--spacing-xs);
  color: var(--color-gray-500);
  font-size: var(--font-sm);
  transition: transform var(--transition-fast);
}

.topbar-user.active .dropdown-arrow {
  transform: rotate(180deg);
}

/* User Dropdown Menu */
.user-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 10000;
}

.user-dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-menu .dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: background-color var(--transition-fast);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
}

.user-dropdown-menu .dropdown-item:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary);
}

.user-dropdown-menu .dropdown-item span {
  font-size: var(--font-lg);
}

.user-dropdown-menu .dropdown-divider {
  height: 1px;
  background: var(--color-gray-100);
  margin: 0.25rem 0.75rem;
}

/* =====================================================
   SIDEBAR (NAVIGATION)
   ===================================================== */
.app-container {
  display: flex;
  min-height: 100vh;
  width: 100vw;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: linear-gradient(160deg, #0f172a 0%, #1e293b 60%, #1a2844 100%);
  color: var(--color-white);
  display: flex;
  flex-direction: column;
  z-index: var(--z-fixed);
  transition: transform var(--transition-normal);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition:
    margin-left var(--transition-normal),
    width var(--transition-normal);
  position: relative;
  z-index: 2;
  width: calc(100vw - var(--sidebar-width));
  background: var(--color-page-bg);
  overflow-x: hidden;
}

.app-container.sidebar-collapsed .main-content {
  margin-left: 0;
}

.content-wrapper {
  flex: 1;
  padding: var(--spacing-xl);
  margin-top: var(--topbar-height);
  animation: contentFadeIn 0.22s ease-out both;
}

@keyframes contentFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.content-header {
  margin-bottom: var(--spacing-xl);
}

.content-header h1 {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin: 0 0 var(--spacing-sm) 0;
}

.content-header p {
  color: var(--color-gray-600);
  margin: 0;
  font-size: var(--font-md);
}

.sidebar.hidden {
  transform: translateX(-100%);
}

.sidebar-header {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  padding: 0 var(--spacing-lg);
  background: rgba(0, 0, 0, 0.12);
}

.sidebar-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}

.sidebar-logo-img {
  height: 32px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
  background: #ffffff;
  border-radius: 6px;
  padding: 3px 8px;
}

.sidebar-logo span {
  background: linear-gradient(135deg, #60a5fa, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg) 0;
}

.sidebar-nav-list {
  list-style: none;
}

.sidebar-nav-item {
  margin-bottom: var(--spacing-xs);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0.6rem var(--spacing-lg);
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-right: 0.75rem;
}

.sidebar-nav-link:hover {
  background-color: rgba(255, 255, 255, 0.07);
  color: var(--color-white);
}

.sidebar-nav-link.active {
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.2), rgba(37, 99, 235, 0.03));
  color: #bfdbfe;
  border-left-color: #3b82f6;
  font-weight: 600;
}

.sidebar-nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Sidebar Collapsed State — app-container pattern */
.app-container.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
}
.app-container.sidebar-collapsed .main-content {
  margin-left: 0;
  width: 100vw;
}
.app-container.sidebar-collapsed .topbar {
  left: 0;
  width: 100%;
}

/* Sidebar Collapsed State — layout-wrapper pattern */
.layout-wrapper.sidebar-collapsed .sidebar {
  transform: translateX(-100%);
}
.layout-wrapper.sidebar-collapsed .layout-main {
  margin-left: 0;
}
.layout-wrapper.sidebar-collapsed .topbar {
  left: 0;
  width: 100%;
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(37, 99, 235, 0.07);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  overflow: clip;
  margin-bottom: var(--spacing-lg);
  transition:
    box-shadow var(--transition-normal),
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.card:hover {
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.1), 0 8px 28px rgba(0, 0, 0, 0.05);
  border-color: rgba(37, 99, 235, 0.13);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
  background-color: var(--color-white);
}

.card-title {
  font-size: var(--font-xl);
  font-weight: 600;
  margin: 0;
  color: var(--color-gray-900);
}

.card-subtitle {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
  margin-top: var(--spacing-xs);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(37, 99, 235, 0.07);
  background-color: var(--color-white);
}

.card-compact .card-header,
.card-compact .card-body,
.card-compact .card-footer {
  padding: var(--spacing-md);
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-sm);
  font-weight: 600;
  line-height: var(--line-height-normal);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e40af 100%);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
}

.btn-success {
  background: linear-gradient(135deg, #34d399 0%, #10b981 50%, #059669 100%);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #f87171 0%, #ef4444 50%, #dc2626 100%);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.28);
}

.btn-danger:hover:not(:disabled) {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
  transform: translateY(-1px);
}

.btn-warning {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.28);
}

.btn-warning:hover:not(:disabled) {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-gray-700);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-sm);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-lg);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: var(--spacing-sm);
  width: 36px;
  height: 36px;
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-sm);
  font-weight: 600;
  color: var(--color-gray-700);
}

.form-label-required::after {
  content: " *";
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-sm);
  font-family: var(--font-primary);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow:
    0 0 0 3px rgba(37, 99, 235, 0.12),
    0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-help {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-sm);
  color: var(--color-gray-500);
}

.form-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-sm);
  color: var(--color-error);
}

.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-checkbox label,
.form-radio label {
  font-size: var(--font-base);
  font-weight: 400;
  color: var(--color-gray-700);
  cursor: pointer;
  margin: 0;
}

.form-inline {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-md);
}

.form-inline .form-group {
  flex: 1;
  margin-bottom: 0;
}

/* =====================================================
   TABLES
   ===================================================== */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table thead {
  background: #f7f9ff;
}

.table th {
  padding: 0.75rem var(--spacing-lg);
  text-align: left;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  border-bottom: 1px solid rgba(37, 99, 235, 0.1);
  vertical-align: middle;
  white-space: nowrap;
}

.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-sm);
  color: var(--color-gray-800);
  border-bottom: 1px solid rgba(37, 99, 235, 0.05);
  vertical-align: middle;
}

/* Inline-block elements (badge etc.) inside table cells must not shift baseline */
.table td > .badge,
.table td > span,
.table td > code {
  vertical-align: middle;
}

.table tbody tr:hover {
  background-color: #f5f8ff;
  transition: background-color 0.12s ease;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:nth-child(even) {
  background-color: rgba(37, 99, 235, 0.018);
}

.table-compact th,
.table-compact td {
  padding: var(--spacing-sm) var(--spacing-md);
}

.table-actions {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--spacing-sm);
}

/* =====================================================
   ALERTS
   ===================================================== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.alert-message {
  font-size: var(--font-sm);
  margin: 0;
}

.alert-success {
  background-color: #f0fdf6;
  color: #166534;
  border: 1px solid #bbf7d0;
  border-left: 4px solid #22c55e;
}

.alert-warning {
  background-color: #fffdf0;
  color: #92400e;
  border: 1px solid #fde68a;
  border-left: 4px solid #f59e0b;
}

.alert-error {
  background-color: #fff5f5;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-left: 4px solid #ef4444;
}

.alert-info {
  background-color: #f0f9ff;
  color: #0369a1;
  border: 1px solid #bae6fd;
  border-left: 4px solid #0ea5e9;
}

.alert-dismissible {
  position: relative;
  padding-right: var(--spacing-3xl);
}

.alert-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: inherit;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
}

/* =====================================================
   BADGES
   ===================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-primary {
  background-color: var(--color-primary-lighter);
  color: var(--color-primary-dark);
}

.badge-success {
  background-color: var(--color-success-light);
  color: #065f46;
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: #92400e;
}

.badge-error {
  background-color: var(--color-error-light);
  color: #991b1b;
}

.badge-info {
  background-color: var(--color-info-light);
  color: #0e7490;
}

.badge-secondary {
  background-color: var(--color-gray-200);
  color: var(--color-gray-700);
}

/* =====================================================
   MODALS
   ===================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  display: none; /* Hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  overflow-y: auto;
  padding: var(--spacing-lg);
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(37, 99, 235, 0.08);
  box-shadow:
    0 25px 60px -12px rgba(37, 99, 235, 0.2),
    0 12px 24px -8px rgba(0, 0, 0, 0.1);
  max-width: 90%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: contentFadeIn 0.2s ease-out both;
}

.modal-sm {
  max-width: 400px;
}
.modal-md {
  max-width: 600px;
}
.modal-lg {
  max-width: 900px;
}
.modal-xl {
  max-width: 1200px;
}

.modal-header {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-xl);
  font-weight: 600;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-gray-900);
}

.modal-body {
  padding: var(--spacing-xl);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

/* =====================================================
   PAGINATION
   ===================================================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  margin: var(--spacing-xl) 0;
}

.pagination-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination-item:hover:not(.active):not(:disabled) {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.pagination-item.active {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.pagination-item:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* =====================================================
   BREADCRUMBS
   ===================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-sm);
}

.breadcrumb-item {
  color: var(--color-gray-500);
}

.breadcrumb-item a {
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
}

.breadcrumb-separator {
  color: var(--color-gray-400);
}

.breadcrumb-item.active {
  color: var(--color-gray-900);
  font-weight: 500;
}

/* =====================================================
   STATS/METRICS CARDS
   ===================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.08);
  position: relative;
  overflow: hidden;
  transition:
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #60a5fa);
}

.stat-card.success::before {
  background: linear-gradient(90deg, #10b981, #34d399);
}

.stat-card.danger::before {
  background: linear-gradient(90deg, #ef4444, #f87171);
}

.stat-card.info::before {
  background: linear-gradient(90deg, #0ea5e9, #38bdf8);
}

.stat-card.warning::before {
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.stat-card:hover {
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.1), 0 8px 28px rgba(0, 0, 0, 0.05);
  transform: translateY(-3px);
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-400);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-gray-900);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: var(--font-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-xs);
}

.stat-change {
  font-size: var(--font-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-error);
}

/* =====================================================
   LOADING STATES
   ===================================================== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.loading-overlay.active {
  display: flex;
}

/* =====================================================
   EMPTY STATES
   ===================================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  color: var(--color-gray-400);
}

.empty-state-title {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.empty-state-message {
  font-size: var(--font-base);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-lg);
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

/* Spacing */
.mt-0 {
  margin-top: 0 !important;
}
.mt-1 {
  margin-top: var(--spacing-xs) !important;
}
.mt-2 {
  margin-top: var(--spacing-sm) !important;
}
.mt-3 {
  margin-top: var(--spacing-md) !important;
}
.mt-4 {
  margin-top: var(--spacing-lg) !important;
}
.mt-5 {
  margin-top: var(--spacing-xl) !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}
.mb-1 {
  margin-bottom: var(--spacing-xs) !important;
}
.mb-2 {
  margin-bottom: var(--spacing-sm) !important;
}
.mb-3 {
  margin-bottom: var(--spacing-md) !important;
}
.mb-4 {
  margin-bottom: var(--spacing-lg) !important;
}
.mb-5 {
  margin-bottom: var(--spacing-xl) !important;
}

.ml-0 {
  margin-left: 0 !important;
}
.ml-1 {
  margin-left: var(--spacing-xs) !important;
}
.ml-2 {
  margin-left: var(--spacing-sm) !important;
}
.ml-3 {
  margin-left: var(--spacing-md) !important;
}
.ml-auto {
  margin-left: auto !important;
}

.mr-0 {
  margin-right: 0 !important;
}
.mr-1 {
  margin-right: var(--spacing-xs) !important;
}
.mr-2 {
  margin-right: var(--spacing-sm) !important;
}
.mr-3 {
  margin-right: var(--spacing-md) !important;
}
.mr-auto {
  margin-right: auto !important;
}

.p-0 {
  padding: 0 !important;
}
.p-1 {
  padding: var(--spacing-xs) !important;
}
.p-2 {
  padding: var(--spacing-sm) !important;
}
.p-3 {
  padding: var(--spacing-md) !important;
}
.p-4 {
  padding: var(--spacing-lg) !important;
}

/* Display */
.d-none {
  display: none !important;
}
.d-block {
  display: block !important;
}
.d-inline {
  display: inline !important;
}
.d-inline-block {
  display: inline-block !important;
}
.d-flex {
  display: flex !important;
}
.d-grid {
  display: grid !important;
}

/* Flexbox */
.flex-row {
  flex-direction: row !important;
}
.flex-column {
  flex-direction: column !important;
}
.flex-wrap {
  flex-wrap: wrap !important;
}
.flex-nowrap {
  flex-wrap: nowrap !important;
}
.justify-start {
  justify-content: flex-start !important;
}
.justify-center {
  justify-content: center !important;
}
.justify-end {
  justify-content: flex-end !important;
}
.justify-between {
  justify-content: space-between !important;
}
.align-start {
  align-items: flex-start !important;
}
.align-center {
  align-items: center !important;
}
.align-end {
  align-items: flex-end !important;
}
.gap-1 {
  gap: var(--spacing-xs) !important;
}
.gap-2 {
  gap: var(--spacing-sm) !important;
}
.gap-3 {
  gap: var(--spacing-md) !important;
}
.gap-4 {
  gap: var(--spacing-lg) !important;
}

/* Text Alignment */
.text-left {
  text-align: left !important;
}
.text-center {
  text-align: center !important;
}
.text-right {
  text-align: right !important;
}

/* Text Colors */
.text-primary {
  color: var(--color-primary) !important;
}
.text-secondary {
  color: var(--color-secondary) !important;
}
.text-success {
  color: var(--color-success) !important;
}
.text-warning {
  color: var(--color-warning) !important;
}
.text-error {
  color: var(--color-error) !important;
}
.text-muted {
  color: var(--color-gray-500) !important;
}

/* Font Weights */
.fw-normal {
  font-weight: 400 !important;
}
.fw-medium {
  font-weight: 500 !important;
}
.fw-semibold {
  font-weight: 600 !important;
}
.fw-bold {
  font-weight: 700 !important;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

/* ── Tablet landscape & small laptops (≤1280px) ── */
@media (max-width: 1280px) {
  :root {
    --sidebar-width: 230px;
  }
  .col-3 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .col-4 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Tablet portrait (≤1024px) — sidebar off-canvas ── */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 260px;
  }

  /* Sidebar becomes overlay */
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition:
      transform var(--transition-normal),
      box-shadow var(--transition-normal);
    box-shadow: none;
  }
  .sidebar.active {
    transform: translateX(0);
    box-shadow: 4px 0 32px rgba(0, 0, 0, 0.25);
  }

  /* Backdrop overlay when sidebar open */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: calc(var(--z-modal) - 1);
    backdrop-filter: blur(2px);
  }
  .sidebar-backdrop.active {
    display: block;
  }

  /* Content fills full width */
  .main-content {
    margin-left: 0 !important;
    width: 100vw !important;
  }
  .layout-main {
    margin-left: 0 !important;
  }
  .topbar {
    left: 0 !important;
    width: 100% !important;
  }

  /* Sidebar toggle always visible */
  .sidebar-toggle {
    display: flex !important;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Table — allow horizontal scroll */
  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Grid columns relax */
  .col-3,
  .col-4 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  .col-9,
  .col-8 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* ── Mobile (≤768px) ── */
@media (max-width: 768px) {
  .container,
  .container-fluid {
    padding: 0 var(--spacing-md);
  }

  .layout-content {
    padding: var(--spacing-md);
    margin-top: var(--topbar-height);
  }

  .content-wrapper {
    padding: var(--spacing-md);
  }

  /* Cards */
  .card-header,
  .card-body,
  .card-footer {
    padding: var(--spacing-md);
  }

  /* Stats full-width single column */
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-value {
    font-size: 1.75rem;
  }

  /* Tables scroll and compact */
  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-lg);
  }

  .table th {
    padding: 0.6rem 0.75rem;
    font-size: 0.65rem;
  }

  .table td {
    padding: 0.6rem 0.75rem;
    font-size: var(--font-xs);
  }

  /* Hide less critical table columns on mobile */
  .table .hide-mobile {
    display: none;
  }

  /* Table action buttons stack */
  .table-actions {
    flex-direction: column;
    gap: 0.25rem;
  }
  .table-actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Modals full width */
  .modal {
    padding: var(--spacing-sm);
    align-items: flex-end;
  }
  .modal-content {
    max-width: 100% !important;
    max-height: 92vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }

  /* All cols become full width */
  .col-1,
  .col-2,
  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9,
  .col-10,
  .col-11,
  .col-12 {
    flex: 0 0 100%;
    max-width: 100%;
  }

  /* Buttons in rows stack */
  .d-flex.justify-between {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
  }
  .d-flex.justify-between .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  /* Topbar compact */
  .topbar {
    padding: 0 var(--spacing-md);
  }
  .topbar-user-info {
    display: none;
  }

  /* Page title smaller */
  .layout-content h1,
  .content-wrapper h1 {
    font-size: var(--font-2xl);
  }

  /* Form layout */
  .form-inline {
    flex-direction: column;
  }
  .form-inline .form-group {
    width: 100%;
  }

  /* Badge text smaller */
  .badge {
    font-size: 0.6rem;
    padding: 0.15rem 0.45rem;
  }

  /* Filters form grid → single col */
  .filters-row,
  .filters-form .row {
    grid-template-columns: 1fr;
  }
  .filters-form .row .col-2,
  .filters-form .row .col-3,
  .filters-form .row .col-4 {
    flex: 0 0 100%;
    max-width: 100%;
  }

  /* Pagination compact */
  .pagination {
    flex-wrap: wrap;
    gap: 0.25rem;
  }
  .pagination-item {
    min-width: 32px;
    height: 32px;
    font-size: 0.75rem;
  }
}

/* ── Small mobile (≤480px) ── */
@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .topbar-title {
    font-size: var(--font-base);
  }

  .layout-content h1,
  .content-wrapper h1 {
    font-size: var(--font-xl);
  }

  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-base);
  }
}

/* =====================================================
   PRINT STYLES
   ===================================================== */
@media print {
  .sidebar,
  .topbar,
  .btn,
  .pagination,
  .breadcrumb {
    display: none !important;
  }

  .layout-main {
    margin-left: 0 !important;
  }

  .layout-content {
    margin-top: 0 !important;
    padding: 0 !important;
  }

  .card {
    box-shadow: none !important;
    break-inside: avoid;
  }
}

/* =====================================================
   ACCESSIBILITY
   ===================================================== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* =====================================================
   STUDENT RESULTS PAGE — filters only (stat-card defined above)
   ===================================================== */

.filters-form {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.07);
}

.filters-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  align-items: end;
}

.d-flex {
  display: flex;
}

.justify-between {
  justify-content: space-between;
}

.align-center {
  align-items: center;
}

.align-end {
  align-items: flex-end;
}

.text-muted {
  color: var(--color-gray-600);
  margin: 0;
}

.score-cell {
  font-weight: 600;
}

.score-excellent {
  color: var(--color-success);
}

.score-good {
  color: var(--color-info);
}

.score-fair {
  color: var(--color-warning);
}

.score-poor {
  color: var(--color-error);
}

/* =====================================================
   RESULT DETAIL PAGE
   ===================================================== */
.result-header {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.07);
}

.result-header h2 {
  margin: 0 0 1rem 0;
  color: var(--color-gray-900);
  font-size: var(--font-2xl);
}

.header-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.header-item {
  border-left: 3px solid var(--color-primary);
  padding-left: 1rem;
}

.header-label {
  font-size: var(--font-sm);
  color: var(--color-gray-600);
  margin-bottom: 0.25rem;
}

.header-value {
  font-size: var(--font-lg);
  font-weight: 600;
  color: var(--color-gray-900);
}

.score-summary {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.07);
}

.score-summary h3 {
  margin: 0 0 1rem 0;
  color: var(--color-gray-900);
  font-size: var(--font-xl);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.score-item {
  text-align: center;
  padding: 1rem;
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

.score-number {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.score-label {
  font-size: var(--font-sm);
  color: var(--color-gray-600);
}

.correct {
  color: var(--color-success);
}
.wrong {
  color: var(--color-error);
}
.blank {
  color: var(--color-gray-600);
}
.percentage {
  color: var(--color-primary);
}

.question-list {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.07);
}

.question-list h3 {
  margin: 0 0 1.5rem 0;
  color: var(--color-gray-900);
  font-size: var(--font-xl);
}

.question-item {
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.question-item.correct {
  border-color: var(--color-success);
  background: #f1f9f3;
}

.question-item.wrong {
  border-color: var(--color-error);
  background: #fdf3f4;
}

.question-item.blank {
  border-color: var(--color-warning);
  background: #fffdf0;
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-gray-200);
}

.question-number {
  font-weight: 600;
  color: var(--color-gray-900);
  font-size: var(--font-md);
}

.question-badges {
  display: flex;
  gap: 0.5rem;
}

.badge-correct {
  background: var(--color-success-light);
  color: #155724;
}

.badge-wrong {
  background: var(--color-error-light);
  color: #721c24;
}

.badge-blank {
  background: var(--color-warning-light);
  color: #856404;
}

.badge-difficulty {
  background: var(--color-primary-lighter);
  color: #004085;
}

.question-text {
  font-size: var(--font-md);
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--color-gray-900);
}

.options-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.option-item {
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
}

.option-item.selected {
  background: var(--color-primary-lighter);
  border-color: var(--color-primary);
  font-weight: 500;
}

.option-item.correct-answer {
  background: var(--color-success-light);
  border-color: var(--color-success);
  font-weight: 500;
}

.option-item.wrong-selected {
  background: var(--color-error-light);
  border-color: var(--color-error);
  font-weight: 500;
}

.explanation-box {
  background: var(--color-gray-50);
  border-left: 4px solid var(--color-info);
  padding: 1rem;
  margin-top: 1rem;
  border-radius: var(--radius-md);
}

.explanation-label {
  font-weight: 600;
  color: var(--color-info);
  margin-bottom: 0.5rem;
  font-size: var(--font-sm);
}

.back-button {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--color-gray-600);
  color: var(--color-white);
  text-decoration: none;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  font-size: var(--font-sm);
  transition: background-color var(--transition-fast);
}

.back-button:hover {
  background: var(--color-gray-700);
}

/* =====================================================
   AUTHENTICATION PAGES
   ===================================================== */
/* =====================================================
   AUTH PAGES — PREMIUM SPLIT LAYOUT
   ===================================================== */

.auth-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* ── Brand Panel (left) ──────────────────────────── */
.auth-brand {
  background: linear-gradient(145deg, #0f1f5c 0%, #1a337c 38%, #2563eb 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3.5rem;
  position: relative;
  overflow: hidden;
}

.auth-brand::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    128deg,
    rgba(255,255,255,0.055) 0%,
    transparent 48%,
    rgba(56,189,248,0.04) 100%
  );
  pointer-events: none;
  z-index: 0;
}

.auth-brand::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 8% 92%, rgba(56,189,248,0.14) 0%, transparent 48%);
  pointer-events: none;
  z-index: 0;
}

/* Orbit ring decoration */
.auth-brand-rings {
  position: absolute;
  bottom: -140px;
  right: -130px;
  pointer-events: none;
  z-index: 0;
}

.auth-brand-rings span {
  position: absolute;
  border-radius: 50%;
  top: 0;
  left: 0;
  transform: translate(-50%, -50%);
}

.auth-brand-rings span:nth-child(1) {
  width: 480px;
  height: 480px;
  border: 1px solid rgba(255,255,255,0.055);
}

.auth-brand-rings span:nth-child(2) {
  width: 320px;
  height: 320px;
  border: 1px solid rgba(56,189,248,0.1);
}

.auth-brand-rings span:nth-child(3) {
  width: 160px;
  height: 160px;
  border: 1px solid rgba(56,189,248,0.18);
}

.auth-brand-inner {
  position: relative;
  z-index: 1;
  max-width: 420px;
}

.auth-brand-logo {
  font-size: 1.875rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  margin-bottom: 2.25rem;
}

.auth-brand-logo-img {
  height: 44px;
  width: auto;
  max-width: 240px;
  object-fit: contain;
  display: block;
  background: #ffffff;
  border-radius: 8px;
  padding: 6px 14px;
}

.auth-brand-logo span {
  color: #93c5fd;
}

.auth-brand-tagline {
  font-size: 2.125rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.auth-brand-sub {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.auth-brand-features {
  list-style: none;
  padding: 0;
  margin: 0 0 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.auth-brand-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.875rem;
  font-weight: 400;
  padding: 0.8rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  line-height: 1.5;
  transition: color 0.15s;
}

.auth-brand-features li:first-child {
  border-top: 1px solid rgba(255,255,255,0.08);
}

.auth-brand-features li:hover {
  color: rgba(255, 255, 255, 0.98);
}

.auth-feat-icon {
  display: none;
}

.auth-feat-check {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  margin-top: 2px;
  color: #38bdf8;
}

.auth-brand-divider {
  height: 2rem;
}

.auth-brand-stats {
  display: flex;
  gap: 2rem;
}

.auth-brand-stats > div {
  flex: 1;
  padding-top: 1rem;
  border-top: 2px solid rgba(255,255,255,0.18);
  transition: border-color 0.2s;
}

.auth-brand-stats > div:hover {
  border-top-color: #38bdf8;
}

.auth-brand-stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}

.auth-brand-stat-label {
  font-size: 0.625rem;
  color: rgba(255, 255, 255, 0.42);
  margin-top: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}

/* ── Form Panel (right) ──────────────────────────── */
.auth-form-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #edf0fa;
  padding: 3rem 2rem;
  overflow-y: auto;
  min-height: 100vh;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-white);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow:
    0 0 0 1px rgba(37,99,235,0.07),
    0 8px 40px rgba(15, 31, 92, 0.1),
    0 1px 4px rgba(0, 0, 0, 0.04);
  animation: authCardIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
  position: relative;
}

/* Corner bracket accents */
.auth-card::before {
  content: "";
  position: absolute;
  top: 1.125rem;
  right: 1.125rem;
  width: 18px;
  height: 18px;
  border-top: 2px solid rgba(37,99,235,0.18);
  border-right: 2px solid rgba(37,99,235,0.18);
  border-radius: 0 5px 0 0;
  pointer-events: none;
}

.auth-card::after {
  content: "";
  position: absolute;
  bottom: 1.125rem;
  left: 1.125rem;
  width: 18px;
  height: 18px;
  border-bottom: 2px solid rgba(37,99,235,0.18);
  border-left: 2px solid rgba(37,99,235,0.18);
  border-radius: 0 0 0 5px;
  pointer-events: none;
}

@keyframes authCardIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-card-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  margin-bottom: 1.125rem;
}

.auth-card-logo-img {
  height: 36px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  display: block;
}

.auth-card-logo .logo-accent {
  color: #7c3aed;
}

.auth-card-heading {
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--color-gray-900);
  margin-bottom: 0.25rem;
  margin-top: 1.125rem;
  letter-spacing: -0.4px;
}

.auth-card-sub {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 1.75rem;
  line-height: 1.5;
}

.auth-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: rgba(37,99,235,0.06);
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: 100px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.875rem;
}

.auth-card-badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: authDotPulse 2.5s ease-in-out infinite;
}

@keyframes authDotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.auth-form {
  margin-bottom: 0;
}

.auth-form .form-group {
  margin-bottom: 1.125rem;
}

.auth-form .form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 0.375rem;
  letter-spacing: 0.01em;
}

.auth-form .form-input,
.auth-form .form-select,
.auth-form .form-textarea {
  width: 100%;
  padding: 0.75rem 0.9375rem;
  font-size: 0.9375rem;
  border: 1.5px solid var(--color-gray-200);
  border-radius: 10px;
  background: #fafbff;
  color: var(--color-gray-900);
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
  font-family: var(--font-primary);
}

.auth-form .form-input:hover:not(:focus),
.auth-form .form-select:hover:not(:focus) {
  border-color: var(--color-gray-300);
}

.auth-form .form-input:focus,
.auth-form .form-select:focus,
.auth-form .form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.auth-form .form-input::placeholder {
  color: var(--color-gray-400);
  font-size: 0.875rem;
}

/* Input with leading icon */
.auth-input-wrap {
  position: relative;
}

.auth-input-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: 0.9375rem;
  pointer-events: none;
  display: flex;
  align-items: center;
  line-height: 1;
  transition: color 0.18s ease;
}

.auth-input-wrap:focus-within .auth-input-icon {
  color: var(--color-primary);
}

.auth-icon-svg {
  width: 16px;
  height: 16px;
  display: block;
}

.auth-input-wrap .form-input {
  padding-left: 2.75rem;
}

.auth-form .form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

.auth-form .form-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.auth-form .form-checkbox span {
  font-size: 0.8125rem;
  color: var(--color-gray-600);
  line-height: 1.5;
}

/* Premium submit button */
.auth-submit-btn {
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.22s ease;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  letter-spacing: 0.02em;
  margin-top: 0.5rem;
  font-family: var(--font-primary);
}

.auth-submit-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  transition: left 0.55s ease;
}

.auth-submit-btn:hover::after {
  left: 150%;
}

.auth-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
  background: linear-gradient(135deg, #1d4ed8 0%, #1e3a8a 100%);
}

.auth-submit-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Section divider inside form */
.auth-section-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-500);
  margin: 1.25rem 0 0.875rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-gray-100);
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-gray-100);
}

.auth-footer p {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  margin: 0;
}

.auth-footer a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* Password strength indicator */
.password-strength {
  margin-top: 0.5rem;
  height: 4px;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.password-strength-bar {
  height: 100%;
  width: 0;
  transition: all 0.3s ease;
  border-radius: var(--radius-full);
}

.password-strength-bar.weak {
  width: 33%;
  background: var(--color-error);
}

.password-strength-bar.medium {
  width: 66%;
  background: var(--color-warning);
}

.password-strength-bar.strong {
  width: 100%;
  background: var(--color-success);
}

.password-strength-text {
  font-size: 0.7rem;
  margin-top: 0.25rem;
  color: var(--color-gray-500);
}

/* Auth alerts */
.auth-card .alert {
  margin-bottom: 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  animation: slideDown 0.35s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 900px) {
  .auth-layout {
    grid-template-columns: 1fr;
  }

  .auth-brand {
    display: none;
  }

  .auth-form-panel {
    padding: 2rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: 1.75rem 1.25rem;
    border-radius: var(--radius-lg);
    box-shadow: none;
    background: transparent;
  }

  .auth-card::before,
  .auth-card::after {
    display: none;
  }

  .auth-form-panel {
    background: var(--color-white);
    padding: 1.5rem 1.25rem 2rem;
  }
}

/* =====================================================
   END OF THEME
   ===================================================== */

/* =====================================================
   EXAM TAKE PAGE
   ===================================================== */
.exam-timer {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--color-white);
  padding: 1rem;
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  min-width: 150px;
  text-align: center;
}

.timer-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.timer-value.warning {
  color: var(--color-warning);
}

.timer-value.danger {
  color: var(--color-error);
}

.question-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.question-nav-btn {
  padding: 0.5rem;
  border: 2px solid var(--color-gray-300);
  background: var(--color-white);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  text-align: center;
}

.question-nav-btn.answered {
  background: var(--color-success);
  color: var(--color-white);
  border-color: var(--color-success);
}

.question-nav-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
}

/* =====================================================
   STUDENT SUBJECTS PAGE
   ===================================================== */
.subject-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition-normal);
}

.subject-card.expanded {
  border-color: var(--color-primary);
}

.subject-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  cursor: pointer;
  user-select: none;
}

.subject-header:hover .subject-title {
  color: var(--color-primary);
}

.subject-title {
  font-size: var(--font-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin: 0 0 0.25rem 0;
  transition: color var(--transition-fast);
}

.subject-description {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
  margin: 0;
}

.subject-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-gray-200);
}

.stat-item {
  text-align: center;
}

.subject-stats .stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-gray-900);
}

.subject-stats .stat-label {
  font-size: var(--font-xs);
  color: var(--color-gray-500);
  margin-top: 0.25rem;
}

.subject-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.subject-content.expanded {
  max-height: 5000px;
  transition: max-height 0.5s ease-in;
}

.segment-section {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-info);
}

.segment-header {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.exam-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.exam-item {
  background: var(--color-white);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.exam-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.exam-info {
  flex: 1;
}

.exam-name {
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 0.25rem;
}

.exam-meta {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
}

.exam-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.toggle-icon {
  font-size: 1.5rem;
  transition: transform var(--transition-normal);
}

.toggle-icon.expanded {
  transform: rotate(180deg);
}

.no-data {
  color: var(--color-gray-400);
  font-style: italic;
}

.empty-segment {
  text-align: center;
  padding: 2rem;
  color: var(--color-gray-400);
}

/* =====================================================
   LIVE MONITOR PAGE
   ===================================================== */
.modal.show {
  display: flex;
}

.monitor-card {
  border-left: 4px solid var(--color-primary);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.monitor-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.monitor-card.active {
  border-left-color: var(--color-success);
  background: #f0fff4;
}

.monitor-card.upcoming {
  border-left-color: var(--color-warning);
  background: #fffbf0;
}

.stat-box {
  text-align: center;
  padding: 1rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
}

.stat-box .number {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.stat-box .label {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
}

.stat-box.success .number {
  color: var(--color-success);
}
.stat-box.primary .number {
  color: var(--color-primary);
}
.stat-box.warning .number {
  color: var(--color-warning);
}
.stat-box.info .number {
  color: var(--color-info);
}

.student-row {
  padding: 1rem;
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.student-row:last-child {
  border-bottom: none;
}

.student-row.warning {
  background: #fff3cd;
}

.student-row.danger {
  background: #f8d7da;
}

.progress-bar {
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-success);
  transition: width 0.3s;
}

.progress-bar-fill.warning {
  background: var(--color-warning);
}

.progress-bar-fill.danger {
  background: var(--color-error);
}

.live-indicator {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.refresh-timer {
  font-size: var(--font-sm);
  color: var(--color-gray-500);
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
}

.detail-table th,
.detail-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-200);
}

.detail-table th {
  background: var(--color-gray-50);
  font-weight: 600;
}

.detail-table tr:hover {
  background: var(--color-gray-50);
}

/* =====================================================
   PREMIUM OVERRIDES — Visual Upgrades v2
   ===================================================== */

/* Sidebar nav divider */
.sidebar-nav-item.divider,
li.sidebar-nav-divider {
  padding: 1.2rem 1.5rem 0.35rem;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.2);
  list-style: none;
  pointer-events: none;
}

/* Page title gradient */
.layout-content h1,
.content-wrapper h1 {
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #0f172a 0%, #1e40af 60%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Card title refinement */
.card-title {
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-gray-800);
}

/* Table action buttons */
.table-actions .btn + .btn {
  margin-left: 0.25rem;
}

/* Badge style enhancement */
.badge {
  letter-spacing: 0.05em;
  font-size: 0.68rem;
  padding: 0.22rem 0.65rem;
}

.badge-primary {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  color: #1e40af;
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.badge-success {
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
  color: #14532d;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.badge-warning {
  background: linear-gradient(135deg, #fef9c3, #fef08a);
  color: #713f12;
  border: 1px solid rgba(234, 179, 8, 0.22);
}

.badge-error,
.badge-danger {
  background: linear-gradient(135deg, #ffe4e6, #fecdd3);
  color: #9f1239;
  border: 1px solid rgba(244, 63, 94, 0.18);
}

.badge-info {
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  color: #0c4a6e;
  border: 1px solid rgba(14, 165, 233, 0.18);
}

.badge-secondary {
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  color: var(--color-gray-600);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* Premium page header */
.page-header {
  background: linear-gradient(
    135deg,
    #0f1f5c 0%,
    #1e3a8a 32%,
    #2563eb 68%,
    #3b82f6 100%
  );
  border-radius: var(--radius-xl);
  padding: 2rem 2.5rem 1.75rem;
  color: white;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 8px 32px rgba(37, 99, 235, 0.22),
    0 2px 8px rgba(15, 23, 42, 0.08);
}

.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse at 80% -30%,
      rgba(129, 140, 248, 0.55) 0%,
      transparent 52%
    ),
    radial-gradient(
      ellipse at -5% 120%,
      rgba(14, 165, 233, 0.28) 0%,
      transparent 45%
    );
  pointer-events: none;
}

.page-header::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.045);
  pointer-events: none;
}

.page-header h1 {
  background: none !important;
  -webkit-text-fill-color: white !important;
  color: white !important;
  margin-bottom: 0.25rem;
  position: relative;
  z-index: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
}

.page-header p {
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
  position: relative;
  z-index: 1;
  font-size: 0.9rem;
}

/* Sidebar icon size */
.sidebar-nav-icon {
  font-size: 1.1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

/* Main content area background */
.main-content,
.layout-main {
  background: #f0f4fa;
}

/* Table refinement */
/* Alert premium left-border accent */
.alert-success {
  background: linear-gradient(135deg, #f0fdf4, #dcfce7);
  color: #166534;
  border: 1px solid #bbf7d0;
  border-left: 4px solid #22c55e;
}

.alert-warning {
  background: linear-gradient(135deg, #fffbeb, #fef9c3);
  color: #92400e;
  border: 1px solid #fde68a;
  border-left: 4px solid #f59e0b;
}

.alert-error {
  background: linear-gradient(135deg, #fff1f2, #ffe4e6);
  color: #9f1239;
  border: 1px solid #fecdd3;
  border-left: 4px solid #f43f5e;
}

.alert-info {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  color: #1e40af;
  border: 1px solid #bfdbfe;
  border-left: 4px solid #3b82f6;
}

/* Topbar title style */
.topbar-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-gray-800);
}

/* Form label */
.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-gray-600);
}

/* Pagination active */
.pagination-item.active {
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
  font-weight: 700;
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(0, 0, 0, 0.18);
}

/* =====================================================
   OVERFLOW & LAYOUT FIX — prevents horizontal scroll
   ===================================================== */
html,
body {
  overflow-x: hidden;
  max-width: 100vw;
}

.main-content,
.layout-main {
  min-width: 0;
  overflow-x: hidden;
}

.layout-content,
.content-wrapper {
  min-width: 0;
  /* Do NOT set overflow-x: hidden here — it clips table-wrapper scroll */
}

/* Table always in a scrollable wrapper */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Prevent buttons from overflowing cells */
.table-actions {
  flex-wrap: nowrap;
}

/* Row system no negative overflow on small screens */
@media (max-width: 768px) {
  .row {
    margin: 0;
  }
  .row > [class*="col-"] {
    padding: 0 0.25rem;
  }
}

/* Topbar keep content from overflowing */
.topbar-left,
.topbar-right {
  min-width: 0;
}

.topbar-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =====================================================
   PREMIUM VISUAL POLISH — Final Layer
   ===================================================== */

/* ── Cards: rounded corners + top accent on hover ── */
.card {
  border-radius: var(--radius-xl);
  position: relative;
}

.card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #3b82f6 0%, #818cf8 50%, #22d3ee 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.card:hover::after {
  opacity: 1;
}

.card:hover {
  box-shadow:
    0 4px 24px rgba(37, 99, 235, 0.1),
    0 1px 4px rgba(15, 23, 42, 0.05);
  transform: translateY(-2px);
  border-color: rgba(37, 99, 235, 0.13);
}

/* ── Card header premium gradient ── */
.card-header {
  background: linear-gradient(180deg, #fafbff 0%, #f4f7fc 100%);
  border-bottom: 1px solid rgba(37, 99, 235, 0.07);
}

/* ── Stat card: accent height + hover lift ── */
.stat-card::before {
  height: 3px;
  border-radius: 3px 3px 0 0;
}

.stat-card:hover {
  box-shadow:
    0 10px 30px rgba(37, 99, 235, 0.14),
    0 2px 8px rgba(15, 23, 42, 0.06);
  transform: translateY(-5px);
}

/* ── Topbar avatar premium gradient ── */
.topbar-user-avatar,
.user-avatar {
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 55%, #8b5cf6 100%);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.42);
}

/* ── Sidebar: active link glow ── */
.sidebar-nav-link.active {
  background: linear-gradient(
    90deg,
    rgba(96, 165, 250, 0.22) 0%,
    rgba(96, 165, 250, 0.03) 100%
  );
  color: #bfdbfe;
  border-left-color: #60a5fa;
  font-weight: 600;
}

.sidebar-nav-link.active .sidebar-nav-icon {
  filter: drop-shadow(0 0 5px rgba(96, 165, 250, 0.55));
}

/* ── Sidebar logo accent ── */
.sidebar-logo {
  letter-spacing: -0.03em;
  font-size: 1.45rem;
}

.sidebar-logo-img {
  height: 30px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
  display: block;
  background: #ffffff;
  border-radius: 6px;
  padding: 3px 7px;
}

/* ── Topbar frosted glass refinement ── */
.topbar {
  background-color: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(37, 99, 235, 0.07);
  box-shadow:
    0 1px 0 rgba(37, 99, 235, 0.05),
    0 2px 12px rgba(15, 23, 42, 0.04);
}

/* ── Button glow on hover ── */
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 22px rgba(37, 99, 235, 0.48);
}

.btn-success:hover:not(:disabled) {
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.42);
}

.btn-warning:hover:not(:disabled) {
  background-color: #d97706;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.38);
}

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}

/* ── Modal: deeper shadow ── */
.modal-content {
  border-radius: var(--radius-xl);
  box-shadow:
    0 32px 80px -12px rgba(15, 23, 42, 0.25),
    0 12px 28px -8px rgba(37, 99, 235, 0.1);
}

/* ── Form inputs: softer background + refined focus ── */
.form-input,
.form-select,
.form-textarea {
  background: #fafbfc;
  border-color: #e2e8f0;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  background: #ffffff;
  border-color: var(--color-primary);
  box-shadow:
    0 0 0 3px rgba(37, 99, 235, 0.1),
    0 1px 4px rgba(37, 99, 235, 0.08);
}

/* ── Table: responsive wrapper ── */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
}

/* ── Custom scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(37, 99, 235, 0.18);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(37, 99, 235, 0.32);
}

.sidebar-nav::-webkit-scrollbar {
  width: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 99px;
}

/* ── Dropdown item hover line ── */
.user-dropdown-menu .dropdown-item:hover {
  background: linear-gradient(90deg, #eff6ff, #f5f3ff);
  color: var(--color-primary);
}

/* ── Sidebar gradient upgrade ── */
.sidebar {
  background: linear-gradient(
    168deg,
    #090f1f 0%,
    #0f1a35 45%,
    #111c38 70%,
    #0d1932 100%
  );
}

/* ── Sidebar header finer ── */
.sidebar-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(0, 0, 0, 0.2);
}

/* ── Page header h1 font size on content pages ── */
.page-header h1 {
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
}

/* ── Stat card value typography ── */
.stat-value {
  letter-spacing: -0.03em;
  font-size: 2.25rem;
  line-height: 1;
}

/* ── Empty state refinement ── */
.empty-state {
  background: linear-gradient(180deg, #f8faff, #f0f4fa);
  border-radius: var(--radius-xl);
  border: 1px dashed rgba(37, 99, 235, 0.15);
}

/* ── Pagination style ── */
.pagination-item {
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.pagination-item:hover:not(.active):not(:disabled) {
  background: #eff6ff;
  border-color: rgba(37, 99, 235, 0.25);
  color: var(--color-primary);
}

/* ── Alert border-radius refinement ── */
.alert {
  border-radius: var(--radius-lg);
}

/* ── Card inside layout ── */
.layout-content .card,
.content-wrapper .card {
  border: 1px solid rgba(37, 99, 235, 0.07);
}

/* ── Focus ring global ── */
:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.5);
  outline-offset: 2px;
}

/* =====================================================
   RESPONSIVE ENHANCEMENTS v2 — Mobile & Tablet Polish
   ===================================================== */

/* ── Utility: hide at tablet breakpoint (≤1024px) ── */
@media (max-width: 1024px) {
  .hide-tablet {
    display: none !important;
  }
}

/* ── Table actions: always single row, let table scroll instead of wrapping ── */
.table-wrapper .table-actions,
.table-responsive .table-actions {
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 0.3rem;
  align-items: center;
}
.table-wrapper .table-actions .btn,
.table-responsive .table-actions .btn {
  white-space: nowrap;
  flex-shrink: 0;
  width: auto !important;
}
/* form inside table-actions must not break flex layout */
.table-wrapper .table-actions form,
.table-responsive .table-actions form {
  display: contents;
}

/* ── Topbar user info: hide name+role on medium-small screens ── */
@media (max-width: 640px) {
  .topbar-user .user-info {
    display: none;
  }
}

/* ── Exam timer: compact on mobile ── */
@media (max-width: 640px) {
  .exam-timer {
    min-width: 110px;
    padding: 0.6rem 0.75rem;
  }
  .exam-timer > div:first-child {
    font-size: 0.7rem;
    margin-bottom: 0.2rem;
  }
  .timer-value {
    font-size: 1.5rem;
  }
}

/* ── Stat card value: scale down on small screens ── */
@media (max-width: 480px) {
  .stat-value {
    font-size: 1.75rem;
  }
}

/* ── Filter forms with inline flex (e.g. payments.php) ── */
@media (max-width: 640px) {
  .card-body > form.d-flex {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }
  .card-body > form.d-flex select,
  .card-body > form.d-flex input[type="text"] {
    width: 100%;
    max-width: 100% !important;
    min-width: 0 !important;
    flex: 1 1 100%;
  }
}

/* ── Row gap reset on mobile to avoid clipping ── */
@media (max-width: 640px) {
  .row {
    gap: 0.5rem;
  }
  .row > [class*="col-"] {
    padding: 0;
  }
}

/* ── Page header with action buttons: keep button right-aligned ── */
@media (max-width: 640px) {
  .d-flex.justify-between.align-center {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .d-flex.justify-between.align-center .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ── Exam-take question navigator: show above questions on mobile ── */
@media (max-width: 768px) {
  .exam-nav-col {
    order: -1;
  }
  .exam-question-col {
    order: 1;
  }
  .question-nav {
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 0.35rem;
  }
  .question-nav-btn {
    padding: 0.35rem;
    font-size: 0.8rem;
  }
}

/* ── Subject stats grid on small mobile ── */
@media (max-width: 480px) {
  .subject-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Ensure tables don't force the page to be wider than viewport ── */
.table-wrapper,
.table-responsive {
  max-width: 100%;
}

/* ── Card inside modals: no border radius issue on mobile ── */
@media (max-width: 480px) {
  .modal-content .card {
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
}