/* ─── Google Fonts ──────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;0,900;1,400;1,700&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ─── CSS Variables (Light Mode) ─────────────────────────────────────────────── */
:root {
  /* Colors */
  --bg-primary:       #FAF7F0;
  --bg-secondary:     #F0EBE0;
  --bg-tertiary:      #E8E0D0;
  --text-primary:     #2D2D2D;
  --text-secondary:   #5C5C5C;
  --text-muted:       #8A8A8A;
  --accent-primary:   #1B4332;
  --accent-dark:      #0F2B20;
  --accent-light:     #2D6A4F;
  --accent-gold:      #D4A017;
  --accent-gold-dark: #B8860B;
  --accent-gold-light:#E8B820;
  --card-bg:          #FFFFFF;
  --card-hover:       #F8F5EE;
  --border:           #E0D8C8;
  --border-light:     #EDE8DE;
  --shadow-sm:        0 2px 8px rgba(27,67,50,0.06);
  --shadow:           0 4px 20px rgba(27,67,50,0.10);
  --shadow-lg:        0 8px 40px rgba(27,67,50,0.14);
  --shadow-xl:        0 20px 60px rgba(27,67,50,0.18);
  --glass-bg:         rgba(250,247,240,0.85);
  --glass-border:     rgba(224,216,200,0.6);
  --overlay:          rgba(15,43,32,0.5);

  /* Status Colors */
  --success:    #1B7A3E;
  --success-bg: #E8F5ED;
  --error:      #C0392B;
  --error-bg:   #FDE8E6;
  --warning:    #D68A00;
  --warning-bg: #FEF3DC;
  --info:       #1A6FA0;
  --info-bg:    #E0F0FA;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;

  /* Border Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   300ms ease;
  --transition-slow:   500ms ease;
  --transition-theme:  300ms ease;

  /* Layout */
  --navbar-height:  72px;
  --sidebar-width:  260px;
  --container-max:  1280px;
  --content-max:    960px;
}

/* ─── Dark Mode Variables ────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg-primary:       #0D1B2A;
  --bg-secondary:     #162033;
  --bg-tertiary:      #1E2D42;
  --text-primary:     #E8E8E8;
  --text-secondary:   #A8A8A8;
  --text-muted:       #6A7A8A;
  --accent-primary:   #2ECC71;
  --accent-dark:      #27AE60;
  --accent-light:     #5DE890;
  --accent-gold:      #F0C040;
  --accent-gold-dark: #D4A830;
  --accent-gold-light:#FFD060;
  --card-bg:          #1A2740;
  --card-hover:       #213250;
  --border:           #2A3A50;
  --border-light:     #1E2E42;
  --shadow-sm:        0 2px 8px rgba(0,0,0,0.2);
  --shadow:           0 4px 20px rgba(0,0,0,0.3);
  --shadow-lg:        0 8px 40px rgba(0,0,0,0.4);
  --shadow-xl:        0 20px 60px rgba(0,0,0,0.5);
  --glass-bg:         rgba(13,27,42,0.85);
  --glass-border:     rgba(42,58,80,0.6);
  --overlay:          rgba(0,0,0,0.7);

  --success:    #2ECC71;
  --success-bg: #0D2E1A;
  --error:      #E74C3C;
  --error-bg:   #2D0D0A;
  --warning:    #F0C040;
  --warning-bg: #2A1E00;
  --info:       #3498DB;
  --info-bg:    #0A1E30;
}

/* ─── Color Transition ───────────────────────────────────────────────────────── */
*, *::before, *::after {
  transition:
    background-color var(--transition-theme),
    border-color var(--transition-theme),
    color var(--transition-theme),
    box-shadow var(--transition-theme);
}

/* ─── Reset & Base ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: clip;

  /* Firefox */
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) var(--bg-secondary);
}

/* ─── Global Scrollbar (Webkit/Chromium) ─────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-secondary);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

::-webkit-scrollbar-corner {
  background: var(--bg-secondary);
}

/* Dark mode scrollbars */
[data-theme="dark"] body {
  scrollbar-color: var(--accent-primary) var(--bg-tertiary);
}

[data-theme="dark"] ::-webkit-scrollbar-track  { background: var(--bg-tertiary); }
[data-theme="dark"] ::-webkit-scrollbar-thumb  { background: var(--accent-primary); border-color: var(--bg-tertiary); }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: var(--accent-gold); }
[data-theme="dark"] ::-webkit-scrollbar-corner { background: var(--bg-tertiary); }


img { max-width: 100%; height: auto; display: block; }
a  { color: var(--accent-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); }
input, textarea, select { font-family: var(--font-body); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--text-primary);
}

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

@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
}

/* ─── Section Spacing ────────────────────────────────────────────────────────── */
.section {
  padding: var(--space-4xl) 0;
}

@media (max-width: 768px) {
  .section { padding: var(--space-2xl) 0; }
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section-title { font-size: var(--text-3xl); }
  .section-subtitle { font-size: var(--text-base); }
}

/* ─── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-light) 100%);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(27,67,50,0.25), inset 0 1px 0 rgba(255,255,255,0.12);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  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 0.5s ease;
}
.btn-primary:hover::before { left: 150%; }
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent-primary) 100%);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(27,67,50,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
  color: #fff;
}

.btn-gold {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-light) 100%);
  color: #1B1B1B;
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(212,160,23,0.3), inset 0 1px 0 rgba(255,255,255,0.25);
  position: relative;
  overflow: hidden;
}
.btn-gold::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s ease;
}
.btn-gold:hover::before { left: 150%; }
.btn-gold:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--accent-gold-dark) 0%, var(--accent-gold) 100%);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212,160,23,0.5), inset 0 1px 0 rgba(255,255,255,0.2);
  color: #1B1B1B;
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}
.btn-outline:hover:not(:disabled) {
  background: var(--accent-primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-danger {
  background: var(--error);
  color: #fff;
  border-color: var(--error);
}
.btn-danger:hover:not(:disabled) {
  background: #A93226;
  border-color: #A93226;
  transform: translateY(-1px);
  color: #fff;
}

.btn-success {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}
.btn-success:hover:not(:disabled) {
  background: #156830;
  transform: translateY(-1px);
  color: #fff;
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-full { width: 100%; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-icon:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  transform: translateY(-1px);
}
.btn-icon.btn-edit:hover  { color: var(--info); border-color: var(--info); }
.btn-icon.btn-delete:hover{ color: var(--error); border-color: var(--error); }
.btn-icon.btn-view:hover  { color: var(--accent-primary); border-color: var(--accent-primary); }

/* ─── Form Styles ─────────────────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.625rem var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  appearance: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(27,67,50,0.12);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
  box-shadow: 0 0 0 3px rgba(46,204,113,0.15);
}

.form-input.input-error, .form-select.input-error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(192,57,43,0.12);
}

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

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C5C5C' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
}

.form-error, .field-error {
  font-size: var(--text-xs);
  color: var(--error);
  display: block;
  margin-top: 2px;
}

.form-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.input-wrapper {
  position: relative;
}

.password-wrapper .form-input { padding-right: 2.5rem; }

.password-toggle {
  position: absolute;
  right: 0.625rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.password-toggle:hover { color: var(--text-primary); }

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  user-select: none;
}

.checkbox-input { position: absolute; opacity: 0; width: 0; height: 0; }

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox-input:checked + .checkbox-custom::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-input:focus + .checkbox-custom {
  box-shadow: 0 0 0 3px rgba(27,67,50,0.2);
}

.forgot-link {
  font-size: var(--text-sm);
  color: var(--accent-primary);
}

/* ─── Cards ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-theme);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-sm { padding: var(--space-lg); border-radius: var(--radius-lg); }
.card-flat { box-shadow: none; }
.card-flat:hover { box-shadow: var(--shadow); }

/* KPI Cards */
.kpi-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.kpi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.kpi-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kpi-icon-green { background: var(--success-bg); color: var(--success); }
.kpi-icon-gold  { background: var(--warning-bg); color: var(--warning); }
.kpi-icon-blue  { background: var(--info-bg);    color: var(--info); }
.kpi-icon-red   { background: var(--error-bg);   color: var(--error); }

.kpi-value {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.kpi-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.kpi-change {
  font-size: var(--text-xs);
  font-weight: 600;
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  gap: 2px;
}

.kpi-change.positive { color: var(--success); }
.kpi-change.negative { color: var(--error); }

/* ─── Badges ──────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-red    { background: var(--error-bg);   color: var(--error); }
.badge-green  { background: var(--success-bg); color: var(--success); }
.badge-blue   { background: var(--info-bg);    color: var(--info); }
.badge-purple { background: #F3E8FF;           color: #7C3AED; }
.badge-orange { background: #FFF3E0;           color: #E65100; }
.badge-teal   { background: #E0F7F7;           color: #00796B; }
.badge-gold   { background: var(--warning-bg); color: var(--warning); }
.badge-gray   { background: var(--bg-secondary);color: var(--text-secondary); }

[data-theme="dark"] .badge-purple { background: rgba(124,58,237,0.2); color: #A78BFA; }
[data-theme="dark"] .badge-orange { background: rgba(230,81,0,0.2);   color: #FFAB40; }
[data-theme="dark"] .badge-teal   { background: rgba(0,121,107,0.2);  color: #4DB6AC; }

/* Grade Badges */
.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 24px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  font-family: var(--font-mono);
}

.grade-aplus  { background: #1B4332; color: #fff; }
.grade-a      { background: #2D6A4F; color: #fff; }
.grade-aminus { background: #40916C; color: #fff; }
.grade-b      { background: #1A6FA0; color: #fff; }
.grade-c      { background: #D68A00; color: #fff; }
.grade-d      { background: #E65100; color: #fff; }
.grade-f      { background: #C0392B; color: #fff; }

/* ─── Navigation (Shared) ─────────────────────────────────────────────────────── */
#main-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

#main-navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.navbar-logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(27,67,50,0.3);
  flex-shrink: 0;
}

.navbar-school-name {
  display: flex;
  flex-direction: column;
}

.navbar-name-en {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.navbar-name-bn {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1;
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  border-radius: var(--radius-full);
  transition: width var(--transition-base), left var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
  left: 10%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-primary);
  background: rgba(27,67,50,0.06);
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
  background: rgba(46,204,113,0.08);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  background: var(--card-bg);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  background: var(--bg-secondary);
  transform: rotate(20deg);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--space-md);
  z-index: 999;
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - var(--navbar-height));
  overflow-y: auto;
}

.mobile-nav.open { display: block; animation: slideDown 0.25s ease; }

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: rgba(27,67,50,0.08);
  color: var(--accent-primary);
}

.mobile-nav-actions {
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
  margin-top: var(--space-md);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

@media (max-width: 1024px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

/* ─── Panel Layout (Admin/Teacher/Student) ─────────────────────────────────── */
.panel-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: transform var(--transition-base), width var(--transition-base);
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.sidebar-school {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-role {
  font-size: var(--text-xs);
  color: var(--accent-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-md) var(--space-sm) var(--space-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.625rem var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  text-decoration: none;
}

.nav-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(27,67,50,0.1);
  color: var(--accent-primary);
  font-weight: 600;
}

[data-theme="dark"] .nav-item.active {
  background: rgba(46,204,113,0.1);
  color: var(--accent-primary);
}

.nav-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
}

.user-card {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
}

.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: var(--text-base);
  flex-shrink: 0;
}

.user-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: capitalize;
}

/* Panel Content Area */
.panel-main {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.panel-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
}

.panel-topbar-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.panel-topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.panel-content {
  flex: 1;
  padding: var(--space-xl);
  overflow-x: hidden;
}

/* Panel sections */
.panel {
  display: none;
}

.panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* Panel Header */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.panel-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  font-family: var(--font-display);
}

.panel-subtitle {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Mobile sidebar */
.sidebar-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-primary);
  cursor: pointer;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: 99;
}

@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
  .panel-main { margin-left: 0; }
  .sidebar-toggle { display: flex; }
  .sidebar-overlay.visible { display: block; }
}

@media (max-width: 768px) {
  .panel-content { padding: var(--space-md); }
  .panel-topbar { padding: 0 var(--space-md); }
}

/* ─── Grids ───────────────────────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ─── Toast Notifications ─────────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-width: 380px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  pointer-events: all;
  position: relative;
  overflow: hidden;
  min-width: 280px;
}

.toast::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.toast-success::before { background: var(--success); }
.toast-error::before   { background: var(--error); }
.toast-warning::before { background: var(--warning); }
.toast-info::before    { background: var(--info); }

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

.toast-success .toast-icon { color: var(--success); }
.toast-error   .toast-icon { color: var(--error); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info    .toast-icon { color: var(--info); }

.toast-message {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: 1.4;
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}
.toast-close:hover { color: var(--text-primary); }

/* ─── Modal System ────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  animation: fadeIn 0.2s ease;
}

.modal-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-box::-webkit-scrollbar { width: 4px; }
.modal-box::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.modal-sm  { max-width: 420px; }
.modal-md  { max-width: 600px; }
.modal-lg  { max-width: 800px; }
.modal-xl  { max-width: 1000px; }

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

.modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--text-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.modal-close:hover { background: var(--error-bg); color: var(--error); transform: rotate(90deg); }

.modal-body {
  padding: var(--space-xl);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl) var(--space-xl);
  border-top: 1px solid var(--border);
}

/* Confirm Dialog */
.confirm-box {
  padding: var(--space-2xl);
  text-align: center;
}

.confirm-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.confirm-icon i { width: 32px; height: 32px; }

.confirm-icon-danger  { background: var(--error-bg);   color: var(--error);   }
.confirm-icon-warning { background: var(--warning-bg); color: var(--warning); }
.confirm-icon-info    { background: var(--info-bg);    color: var(--info);    }

.confirm-title   { font-size: var(--text-xl); margin-bottom: var(--space-sm); }
.confirm-message { color: var(--text-secondary); margin-bottom: var(--space-xl); line-height: 1.6; }
.confirm-actions { display: flex; gap: var(--space-sm); justify-content: center; }

/* ─── Login Modal ─────────────────────────────────────────────────────────────── */
.login-modal-box {
  max-width: 440px;
  padding: var(--space-2xl);
}

.login-header { text-align: center; margin-bottom: var(--space-xl); }

.login-logo {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-light));
  border-radius: var(--radius-xl);
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(27,67,50,0.25);
}

.login-shield-icon { width: 36px; height: 36px; color: #fff; }

.login-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.login-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.role-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 4px;
  margin-bottom: var(--space-xl);
  gap: 4px;
}

.role-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.role-tab.active {
  background: var(--card-bg);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

.login-form { display: flex; flex-direction: column; gap: 0; }

.form-error-main {
  padding: var(--space-sm) var(--space-md);
  background: var(--error-bg);
  border-radius: var(--radius-md);
  color: var(--error);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-md);
  min-height: 0;
}

.form-error-main:empty { display: none; }

.login-credentials-hint {
  margin-top: var(--space-lg);
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
}

.login-credentials-hint summary {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
}

.login-credentials-hint summary::-webkit-details-marker { display: none; }

.creds-grid {
  display: grid;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
}

/* ─── Data Table ──────────────────────────────────────────────────────────────── */
.table-wrapper { display: flex; flex-direction: column; gap: var(--space-md); }

.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.table-search {
  position: relative;
  flex: 1;
  max-width: 300px;
}

.table-search .search-icon {
  position: absolute;
  left: var(--space-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.table-search-input {
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 2.25rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: var(--text-sm);
  width: 100%;
  outline: none;
  transition: border-color var(--transition-fast);
}

.table-search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(27,67,50,0.1);
}

.table-count {
  font-size: var(--text-sm);
  color: var(--text-muted);
  white-space: nowrap;
}

.table-scroll { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table thead { background: var(--bg-secondary); }

.data-table th {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  position: relative;
}

.data-table th.sortable { cursor: pointer; user-select: none; }
.data-table th.sortable:hover { color: var(--accent-primary); }

.sort-icon { width: 12px; height: 12px; display: inline-block; margin-left: 4px; vertical-align: middle; }

.data-table td {
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid var(--border-light);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover { background: var(--bg-secondary); }

.table-empty {
  text-align: center;
  padding: var(--space-3xl) !important;
  color: var(--text-muted);
}

.table-empty-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  opacity: 0.4;
}

.table-actions {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

.table-pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.pagination-pages { display: flex; gap: 4px; }

.page-btn {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-btn:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.page-btn.active { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }

.pagination-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.pagination-info {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ─── Skeleton Loader ─────────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg,
    var(--bg-secondary) 25%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text   { height: 16px; margin: 6px 0; width: 100%; }
.skeleton-short  { width: 60%; }
.skeleton-circle { width: 48px; height: 48px; border-radius: var(--radius-full); }

.skeleton-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

/* ─── Icons ───────────────────────────────────────────────────────────────────── */
.icon-xs { width: 14px; height: 14px; }
.icon-sm { width: 18px; height: 18px; }
.icon-md { width: 24px; height: 24px; }
.icon-lg { width: 32px; height: 32px; }
.icon-xl { width: 48px; height: 48px; }

/* ─── Utility Classes ─────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center{ align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.w-full { width: 100%; }
.font-mono { font-family: var(--font-mono); }
.font-display { font-family: var(--font-display); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }
.text-gold   { color: var(--accent-gold); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* Reveal animation base state */
.reveal{
  opacity: 1;
  transform: translateY(0);
}


.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ─── Divider ─────────────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: var(--space-lg) 0;
}

/* ─── Progress Bar ────────────────────────────────────────────────────────────── */
.progress-bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-gold));
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

/* ─── Back to Top ─────────────────────────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 500;
  width: 44px;
  height: 44px;
  background: var(--accent-gold);
  color: var(--accent-dark);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(212,160,23,0.4);
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
  pointer-events: none;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

#back-to-top:hover {
  background: var(--accent-gold-light);
  color: var(--accent-dark);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(212,160,23,0.55);
}

/* ─── Page Loader ─────────────────────────────────────────────────────────────── */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.loader-shield { width: 48px; height: 48px; color: var(--accent-primary); }

.loader-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.loader-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-gold));
  border-radius: var(--radius-full);
  animation: loaderProgress 1.5s ease infinite;
}

/* ─── Modal Open Body ─────────────────────────────────────────────────────────── */
body.modal-open { overflow: hidden; }

/* ─── KPI Grid ────────────────────────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 1200px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .kpi-grid { grid-template-columns: 1fr; } }

/* ─── Attendance Status Buttons (Teacher portal) ──────────────────────────────── */
.att-status-btn {
  padding: 4px 12px;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  background: var(--card-bg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}

.att-present.selected { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.att-absent.selected  { background: var(--error-bg);   border-color: var(--error);   color: var(--error); }
.att-late.selected    { background: var(--warning-bg);  border-color: var(--warning);  color: var(--warning); }

.att-present:hover { border-color: var(--success); color: var(--success); }
.att-absent:hover  { border-color: var(--error);   color: var(--error); }
.att-late:hover    { border-color: var(--warning);  color: var(--warning); }

/* ─── Notice Category Icons ───────────────────────────────────────────────────── */
.notice-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.notice-icon.exam     { background: var(--error-bg);   color: var(--error); }
.notice-icon.holiday  { background: var(--success-bg); color: var(--success); }
.notice-icon.event    { background: var(--info-bg);    color: var(--info); }
.notice-icon.academic { background: var(--warning-bg);  color: var(--warning); }

/* ─── Filter Buttons (Student Notice Board) ───────────────────────────────────── */
.filter-btn {
  padding: 0.375rem 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--card-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

/* ─── Panel Enter Animation ───────────────────────────────────────────────────── */
.page-enter {
  animation: pageEnter 0.4s ease;
}

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Marks Input ─────────────────────────────────────────────────────────────── */
.marks-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(27,67,50,0.12);
}

[data-theme="dark"] .marks-input:focus {
  box-shadow: 0 0 0 3px rgba(46,204,113,0.15);
}


/* --- Premium Global Enhancements ------------------------------------------ */

/* Smoother panel transitions */
.panel.active { animation: fadeInUp 0.35s cubic-bezier(0.22, 1, 0.36, 1) both; }

/* KPI Card premium hover */
.kpi-card { transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease; }
.kpi-card:hover { transform: translateY(-6px) scale(1.01); box-shadow: var(--shadow-lg); }

/* Better table row hover */
.data-table tbody tr { transition: background var(--transition-fast); }

/* Btn-icon premium hover */
.btn-icon { transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1); }
.btn-icon:hover { transform: translateY(-2px) scale(1.05); }

/* Responsive panel content */
@media (max-width: 480px) {
  .panel-content { padding: var(--space-sm); }
  .kpi-card { padding: var(--space-md); gap: var(--space-sm); }
  .kpi-value { font-size: var(--text-2xl); }
}

/* Glassmorphism KPI cards in dark mode */
[data-theme="dark"] .kpi-card {
  background: rgba(26, 39, 64, 0.8);
  backdrop-filter: blur(8px);
  border-color: rgba(42, 58, 80, 0.8);
}

/* Smooth scrollbars for panel content */
.panel-content::-webkit-scrollbar { width: 6px; }
.panel-content::-webkit-scrollbar-track { background: transparent; }
.panel-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.panel-content::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }