/* --- DESIGN SYSTEM & CUSTOM PROPERTIES --- */
:root {
  /* Fonts */
  --font-primary: 'Outfit', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Shared Base colors */
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.15);
  --error: #ef4444;
  --error-glow: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --warning-glow: rgba(245, 158, 11, 0.15);
  --info: #06b6d4;
  --info-glow: rgba(6, 182, 212, 0.15);

  /* Transition timings */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-round: 50%;
}

/* Light Theme (Default) */
body,
body.light-theme {
  --bg-app: #f8fafc;
  --bg-color: #f8fafc;
  --bg-app-rgb: 248, 250, 252;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --card-bg: rgba(255, 255, 255, 0.75);
  --border-color: rgba(15, 23, 42, 0.08);
  --border-focus: rgba(79, 70, 229, 0.4);

  --text-main: #0f172a;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --primary: #4f46e5;
  --primary-rgb: 79, 70, 229;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.08);

  --secondary: #9333ea;
  --secondary-rgb: 147, 51, 234;

  --accent: #d97706;
  --accent-glow: rgba(217, 119, 6, 0.1);

  --glass-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.06);
  --glass-bg: rgba(255, 255, 255, 0.85);
}

/* Dark Theme */
body.dark-theme {
  --bg-app: #09090b;
  --bg-color: #09090b;
  --bg-app-rgb: 9, 9, 11;
  --bg-card: rgba(20, 20, 25, 0.65);
  --bg-card-hover: rgba(28, 28, 35, 0.8);
  --card-bg: rgba(20, 20, 25, 0.65);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);

  --text-main: #f4f4f5;
  --text-color: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-inverse: #09090b;

  --primary: #6366f1;
  --primary-rgb: 99, 102, 241;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.15);

  --secondary: #a855f7;
  --secondary-rgb: 168, 85, 247;

  --accent: #f59e0b;
  --accent-glow: rgba(245, 158, 11, 0.15);

  --glass-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(15, 15, 20, 0.7);
}

--secondary-rgb: 147,
51,
234;

--accent: #d97706;
--accent-glow: rgba(217, 119, 6, 0.1);

--glass-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.06);
--glass-bg: rgba(255, 255, 255, 0.75);
}

/* --- RESET & BASE STYLES --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  text-decoration: none;
  color: inherit;
}

button,
input,
select,
textarea {
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  outline: none;
}

/* --- SCROLLBAR --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-sm);
}

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

/* --- GLOBAL LOADING ANIMATION --- */
.app-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: var(--radius-round);
  animation: spin 1s linear infinite;
}

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

/* --- STICKY GLASS HEADER --- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--glass-shadow);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
}

.logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.logo-text {
  background: linear-gradient(to right, var(--text-main), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--border-color);
  color: var(--primary);
}

.sun-icon {
  display: none;
}

body.light-theme .sun-icon {
  display: block;
}

body.light-theme .moon-icon {
  display: none;
}

body.dark-theme .moon-icon {
  display: block;
}

.login-btn {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff !important;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 15px var(--primary-glow);
  transition: var(--transition-fast);
  cursor: pointer;
}

.login-btn:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.user-profile-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-round);
  border: 2px solid var(--primary);
  background: var(--border-color);
  object-fit: cover;
  flex-shrink: 0;
}

.user-profile-name {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.logout-btn {
  color: var(--error);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.logout-btn:hover {
  background: var(--error);
  color: #ffffff;
}

/* --- GLASS CARD STYLING --- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--glass-shadow);
  transition: border-color var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

/* --- TOAST NOTIFICATIONS --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 300px;
  max-width: 400px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideInRight var(--transition-fast) forwards;
}

.toast.success {
  border-left-color: var(--success);
}

.toast.error {
  border-left-color: var(--error);
}

.toast.info {
  border-left-color: var(--info);
}

.toast-message {
  font-size: 0.9rem;
  font-weight: 500;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --- LANDING VIEW --- */
.landing-hero {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 40px;
}

.hero-actions-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px var(--primary-glow);
  cursor: pointer;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.btn-secondary {
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: var(--border-color);
  transform: translateY(-2px);
}

.hero-illustration {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-illustration img {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--border-color);
}

.stats-bar {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-lbl {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Feature grid */
.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section-header h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card i {
  color: var(--primary);
  background: var(--primary-glow);
  padding: 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: inline-block;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--text-muted);
  line-height: 1.5;
  font-size: 0.95rem;
}

/* Portal view */
/* --- REDESIGNED AUTHENTICATION SPLIT VIEW --- */
.auth-page-wrapper {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  position: relative;
  overflow: hidden;
}

.auth-ambient-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
}
.auth-ambient-glow-1 {
  top: -100px;
  right: 10%;
  background: var(--primary);
}
.auth-ambient-glow-2 {
  bottom: -100px;
  left: 10%;
  background: #06b6d4;
}

.auth-modern-card {
  width: 100%;
  max-width: 1080px;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-color);
  border-radius: 28px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(255, 255, 255, 0.08);
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  overflow: hidden;
  position: relative;
  z-index: 1;
  transition: all var(--transition-normal);
}

/* Right Section: Logo & Brand Showcase */
.auth-showcase-panel {
  background: linear-gradient(145deg, rgba(79, 70, 229, 0.08) 0%, rgba(6, 182, 212, 0.06) 100%);
  border-left: 1px solid var(--border-color);
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

[dir="ltr"] .auth-showcase-panel {
  border-left: none;
  border-right: 1px solid var(--border-color);
}

.auth-showcase-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.auth-logo-wrapper {
  background: #ffffff;
  padding: 16px 28px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: transform var(--transition-normal);
}

.auth-logo-wrapper:hover {
  transform: translateY(-3px) scale(1.02);
}

.auth-logo-img {
  height: 75px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.auth-showcase-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.auth-showcase-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 380px;
  margin: 0 auto;
}

.auth-showcase-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 32px 0;
}

.auth-feature-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.auth-feature-item:hover {
  transform: translateX(-4px);
  border-color: var(--border-focus);
}

[dir="ltr"] .auth-feature-item:hover {
  transform: translateX(4px);
}

.auth-feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #06b6d4);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.auth-feature-text h4 {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.auth-feature-text p {
  margin: 2px 0 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.auth-showcase-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.auth-trust-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--primary);
  background: rgba(79, 70, 229, 0.08);
  padding: 6px 12px;
  border-radius: 20px;
}

/* Left Section: Form Area */
.auth-form-panel {
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.auth-tabs-nav {
  display: flex;
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 5px;
  margin-bottom: 24px;
  gap: 6px;
}

.auth-tab-btn {
  flex: 1;
  padding: 11px 16px;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
  background: transparent;
  color: var(--text-muted);
}

.auth-tab-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.auth-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.auth-input-icon {
  position: absolute;
  right: 14px;
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
  transition: color var(--transition-fast);
}

[dir="ltr"] .auth-input-icon {
  right: auto;
  left: 14px;
}

.auth-input-field {
  width: 100%;
  padding: 13px 44px 13px 16px;
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  font-size: 0.92rem;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

[dir="ltr"] .auth-input-field {
  padding: 13px 16px 13px 44px;
}

.auth-input-field:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-card);
}

.auth-input-field:focus + .auth-input-icon {
  color: var(--primary);
}

.auth-password-toggle {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

[dir="ltr"] .auth-password-toggle {
  left: auto;
  right: 14px;
}

.auth-password-toggle:hover {
  color: var(--primary);
}

.auth-btn-submit {
  width: 100%;
  padding: 14px;
  border-radius: 14px;
  font-size: 1.02rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
  box-shadow: 0 6px 20px var(--primary-glow);
  transition: all var(--transition-fast);
}

.auth-btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--primary-glow);
}

/* Quick Demo Badges Card */
.auth-demo-box {
  margin-top: 24px;
  padding: 18px 20px;
  background: var(--bg-app);
  border: 1px dashed var(--border-color);
  border-radius: 16px;
}

.auth-demo-title {
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.auth-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.auth-demo-btn {
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-demo-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(79, 70, 229, 0.05);
  transform: translateY(-1px);
}

/* Responsive adjustments */
@media (max-width: 960px) {
  .auth-modern-card {
    grid-template-columns: 1fr;
    max-width: 520px;
    border-radius: 20px;
  }
  
  .auth-showcase-panel {
    border-left: none;
    border-bottom: 1px solid var(--border-color);
    padding: 32px 24px;
  }
  
  .auth-showcase-features {
    display: none;
  }
  
  .auth-form-panel {
    padding: 32px 24px;
  }
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

body.light-theme .form-input {
  background: rgba(255, 255, 255, 0.4);
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.form-select {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.95rem;
  cursor: pointer;
}

body.light-theme .form-select {
  background: rgba(255, 255, 255, 0.4);
}

/* --- STUDENT VIEW --- */
.student-dashboard-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}

.dashboard-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.stat-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
}

.stat-box-icon {
  background: var(--primary-glow);
  color: var(--primary);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- SIDEBAR MENU --- */
body.sidebar-open {
  overflow: hidden !important;
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9980;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.app-sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  width: 300px;
  max-width: calc(100vw - 48px);
  background: var(--bg-card);
  border-inline-start: 1px solid var(--border-color);
  z-index: 9990;
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.35);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

[dir="ltr"] .app-sidebar {
  right: auto;
  left: 0;
  transform: translateX(-100%);
  border-inline-start: none;
  border-inline-end: 1px solid var(--border-color);
  box-shadow: 8px 0 32px rgba(0, 0, 0, 0.35);
}

.app-sidebar.active {
  transform: translateX(0);
  visibility: visible;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.sidebar-close-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.sidebar-menu-list {
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 6px;
  flex: 1;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition-fast);
}

.sidebar-nav-item:hover,
.sidebar-nav-item.active {
  background: var(--primary-glow);
  color: var(--primary);
}

.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-inline-end: 8px;
}

.sidebar-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.stat-box-val {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-box-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.dashboard-section-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

/* ─── Premium Bakalorya Course Card (Inspired by Screenshot) ──────────────── */
.course-card,
.bakalorya-course-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  overflow: hidden;
  height: 100%;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  position: relative;
}

.course-card:hover,
.bakalorya-course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
  border-color: var(--primary);
}

.course-card.banned-card {
  border: 1px solid var(--error) !important;
  opacity: 0.8;
}

/* Image Banner */
.course-img-wrapper {
  position: relative;
  height: 180px;
  width: 100%;
  overflow: hidden;
  background: var(--bg-app);
}

.course-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.course-card:hover .course-img-wrapper img,
.bakalorya-course-card:hover .course-img-wrapper img {
  transform: scale(1.06);
}

/* Category Pill Badge (Top Right) */
.course-category-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #2563eb;
  color: #ffffff;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
  z-index: 2;
  white-space: nowrap;
}

/* Ribbon Bookmark Flag Badge (Top Left - e.g. 2ث / 3ث / BAC) */
.course-ribbon-badge {
  position: absolute;
  top: 0;
  left: 16px;
  background: #451a03;
  color: #ffffff;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 10px 10px 14px 10px;
  border-radius: 0 0 4px 4px;
  z-index: 2;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 82%, 0 100%);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  text-align: center;
  min-width: 38px;
  line-height: 1;
}

/* Content Body */
.course-card-content {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 10px;
}

/* Instructor Row */
.course-instructor-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 2px;
}

.course-instructor-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #3b82f6;
  background: var(--bg-card);
}

.course-instructor-name {
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-color);
}

/* Title & Description */
.course-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-color);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-desc {
  color: var(--text-muted);
  font-size: 0.84rem;
  line-height: 1.5;
  margin: 0;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Card Footer Bar */
.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  gap: 8px;
}

.course-tag-subject {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.course-price-pill {
  background: #10b981;
  color: #ffffff;
  padding: 6px 18px;
  border-radius: 20px;
  font-weight: 800;
  font-size: 0.85rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, background 0.2s;
  border: none;
  cursor: pointer;
}

.course-price-pill:hover {
  background: #059669;
  transform: scale(1.04);
}

.course-progress-bar-wrapper {
  margin-bottom: 16px;
}

.course-progress-bar {
  background: var(--border-color);
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
}

.course-progress-fill {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  height: 100%;
}

.course-progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.course-teacher-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
}

.teacher-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 500;
}

.teacher-avatar {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-round);
}

.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.session-card {
  padding: 16px;
}

.session-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.session-tag {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid rgba(245, 158, 11, 0.3);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}

.session-tag.live {
  background: var(--error-glow);
  color: var(--error);
  border-color: rgba(239, 68, 68, 0.3);
  animation: pulse-border 1.5s infinite;
}

@keyframes pulse-border {
  0% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
  }

  70% {
    box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
}

.session-title {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
}

.session-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}

.session-action {
  margin-top: 14px;
  width: 100%;
  text-align: center;
  padding: 8px;
  font-size: 0.85rem;
}

/* --- COURSE PLAYER VIEW --- */
.course-player-container {
  display: grid;
  grid-template-columns: 2.3fr 1.2fr;
  height: calc(100vh - 73px);
  overflow: hidden;
}

.player-main-area {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  border-right: 1px solid var(--border-color);
}

.video-container {
  position: relative;
  background: #000000;
  aspect-ratio: 16/9;
  width: 100%;
}

.video-container video,
.video-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.video-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  gap: 16px;
  height: 100%;
}

.player-details-card {
  padding: 24px;
}

.player-details-header {
  margin-bottom: 20px;
}

.player-course-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.player-lesson-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.tabs-header {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 18px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  position: relative;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  outline: none;
}

.tab-btn:hover {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
  transform: translateY(-1px);
}

.tab-btn.active {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.12);
  font-weight: 700;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 0 8px var(--primary);
}

.tab-content-pane {
  display: none;
  line-height: 1.5;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.tab-content-pane.active {
  display: block;
}

.sidebar-curriculum {
  overflow-y: auto;
  padding: 24px;
  background: rgba(10, 10, 15, 0.3);
}

.curriculum-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.chapter-group {
  margin-bottom: 24px;
}

.chapter-header {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.lesson-list-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lesson-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition-fast);
}

.lesson-item-row:hover,
.lesson-item-row.active {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.lesson-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lesson-checkbox {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 2px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lesson-checkbox.checked {
  background: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

.lesson-item-title-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lesson-item-title {
  font-size: 0.85rem;
  font-weight: 600;
}

.lesson-item-duration {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- VIRTUAL CLASSROOM VIEW --- */
.classroom-layout {
  display: grid;
  grid-template-columns: 3fr 1fr;
  height: calc(100vh - 73px);
  background: #050508;
  overflow: hidden;
}

.classroom-main {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  position: relative;
}

.classroom-tabs {
  background: #0a0a0f;
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  display: flex;
  gap: 24px;
}

.classroom-tab {
  padding: 14px 0;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
}

.classroom-tab.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}

.classroom-viewport {
  flex-grow: 1;
  background: #000000;
  position: relative;
}

.video-stream-sim {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.whiteboard-container {
  display: none;
  flex-direction: column;
  width: 100%;
  height: 100%;
}

.whiteboard-container.active {
  display: flex;
}

.whiteboard-tools {
  background: #0d0d14;
  border-bottom: 1px solid var(--border-color);
  padding: 8px 16px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.tool-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.tool-btn:hover,
.tool-btn.active {
  background: var(--border-color);
  color: var(--primary);
}

.tool-color {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-round);
  cursor: pointer;
  border: 2px solid transparent;
}

.tool-color.active {
  border-color: #ffffff;
}

.classroom-canvas {
  flex-grow: 1;
  background: #111116;
  cursor: crosshair;
}

.control-bar {
  background: #0a0a0f;
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.controls-group {
  display: flex;
  gap: 12px;
}

.control-icon-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.control-icon-btn:hover {
  background: var(--border-color);
  color: var(--primary);
}

.control-icon-btn.active {
  background: var(--error-glow);
  color: var(--error);
  border-color: var(--error);
}

.leave-classroom-btn {
  background: var(--error);
  color: #ffffff;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.leave-classroom-btn:hover {
  background: #dc2626;
}

.classroom-chat-sidebar {
  display: flex;
  flex-direction: column;
  background: #0a0a0f;
}

.chat-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 700;
  font-size: 1rem;
}

.chat-messages {
  flex-grow: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-bubble {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-bubble-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.chat-sender-name {
  font-weight: 600;
}

.chat-sender-role {
  font-size: 0.65rem;
  background: var(--primary-glow);
  color: var(--primary);
  padding: 1px 4px;
  border-radius: 2px;
  margin-left: 4px;
}

.chat-bubble-body {
  background: var(--bg-card);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.4;
  word-break: break-word;
}

.chat-input-area {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 10px;
}

.chat-input-area input {
  flex-grow: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.85rem;
}

.chat-send-btn {
  background: var(--primary);
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* --- TEACHER VIEW --- */
.teacher-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px;
}

.teacher-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.teacher-actions-top {
  display: flex;
  gap: 12px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.25s forwards;
}

.modal-content {
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 540px;
  box-shadow: var(--glass-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close-btn {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
}

.modal-body {
  padding: 24px;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Interactive Quick Poll Widget inside Classroom */
.classroom-poll-overlay {
  position: absolute;
  bottom: 80px;
  right: 24px;
  width: 320px;
  z-index: 100;
  animation: slideUp var(--transition-fast) forwards;
}

.poll-option-btn {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.poll-option-btn:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.poll-results-bar {
  background: var(--border-color);
  height: 4px;
  border-radius: 2px;
  margin-top: 6px;
  overflow: hidden;
}

.poll-results-fill {
  background: var(--primary);
  height: 100%;
  width: 0;
  transition: width 0.8s ease;
}

/* Dynamic whiteboard active styles */
.whiteboard-active-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-round);
  background: var(--success);
}

/* --- COURSE MANAGE LAYOUT --- */
.course-manage-container {
  display: flex;
  min-height: calc(100vh - 64px);
  background: var(--bg-app);
}

.manage-sidebar {
  width: 280px;
  flex-shrink: 0;
  border-inline-end: 1px solid var(--border-color);
  background: var(--bg-card);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.manage-content {
  flex: 1;
  padding: 36px;
  overflow-y: auto;
}

.manage-nav-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  width: 100%;
  text-align: start;
  transition: var(--transition-fast);
}

.manage-nav-btn:hover {
  background: var(--bg-app);
  color: var(--text-main);
}

.manage-nav-btn.active {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: var(--border-focus);
  font-weight: 700;
}

/* ==========================================================================
   MOBILE & RESPONSIVE DESIGN SYSTEM
   ========================================================================== */

/* --- TABLETS & SMALL DESKTOPS (max-width: 1024px) --- */
@media screen and (max-width: 1024px) {
  .hero-card-main h1 {
    font-size: 1.75rem;
  }

  .hero-card-secondary h2 {
    font-size: 1.5rem;
  }
}

/* --- MOBILE PHONES & TABLETS (max-width: 768px) --- */
@media screen and (max-width: 768px) {

  html,
  body,
  #app-viewport {
    max-width: 100vw !important;
    overflow-x: hidden !important;
  }

  .header-container {
    padding: 8px 14px !important;
    justify-content: space-between !important;
  }

  #header-search-wrapper,
  .header-teachers-link,
  .nav-menu {
    display: none !important;
  }

  .user-profile-name,
  .logout-text {
    display: none !important;
  }

  /* Grid Layouts on Mobile Phones */
  .student-dashboard-layout {
    grid-template-columns: 1fr !important;
    padding: 16px 12px !important;
    gap: 16px !important;
  }

  .dashboard-stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
  }

  .hero-section-grid,
  .subscription-banners-grid,
  .learn-paths-grid,
  .why-choose-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  .degrees-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px !important;
  }

  .hero-card-main,
  .hero-card-secondary {
    padding: 28px 20px !important;
    min-height: auto !important;
    flex-direction: column !important;
    text-align: center;
  }

  .hero-card-image-wrapper,
  .subscription-banner-card img {
    display: none !important;
  }

  #hero-categories-container {
    width: 100% !important;
    grid-template-columns: repeat(2, 1fr) !important;
    margin-top: 14px;
  }

  .gradient-banner-inner {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 14px !important;
  }

  #featured-category-pills {
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    padding: 6px;
    flex-wrap: nowrap !important;
  }

  .outcome-banner-inner {
    flex-direction: column !important;
    text-align: center;
    align-items: center !important;
    gap: 20px;
    padding: 32px 20px !important;
  }

  .footer-grid {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }

  .footer-bottom {
    flex-direction: column !important;
    gap: 10px !important;
    text-align: center;
  }

  .modal-content {
    width: 94vw !important;
    max-width: 94vw !important;
    margin: 10px auto;
    border-radius: 18px !important;
  }

  .modal-footer {
    flex-direction: column-reverse;
    gap: 8px;
  }

  .modal-footer button {
    width: 100%;
  }

  /* Table Touch Scroll */
  .table-responsive,
  table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .course-manage-container,
  .teacher-layout,
  .classroom-layout,
  .course-player-layout {
    flex-direction: column !important;
    height: auto !important;
    min-height: auto !important;
  }

  .manage-sidebar,
  .classroom-chat-sidebar,
  .sidebar-curriculum {
    width: 100% !important;
    max-width: 100% !important;
    border-inline-end: none !important;
    border-bottom: 1px solid var(--border-color) !important;
    padding: 16px !important;
  }
}

/* --- SMALL MOBILE PHONES (max-width: 480px) --- */
@media screen and (max-width: 480px) {
  .dashboard-stats-grid {
    grid-template-columns: 1fr !important;
  }

  .logo-link span {
    font-size: 1rem;
  }

  .stat-box {
    padding: 14px 16px !important;
  }

  .btn-primary,
  .btn-secondary {
    font-size: 0.85rem !important;
    padding: 10px 18px !important;
  }

  .admin-main {
    padding: 14px 10px !important;
  }

  /* Degrees grid on very small: 1 col */
  .degrees-grid {
    grid-template-columns: 1fr !important;
  }

  /* Metrics: 1 col */
  .metrics-strip-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }

  /* Hero h1 even smaller */
  .hero-card-main h1 {
    font-size: 1.3rem !important;
  }

  /* Banner section padding */
  section {
    padding-left: 10px !important;
    padding-right: 10px !important;
  }

  #header-logo {
    height: 44px !important;
    padding: 3px 8px !important;
  }
}

/* ── Admin Sessions Filter Tabs & Pills ──────────────────────────────────────── */
.admin-session-status-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-color);
}

.admin-session-status-filter-btn.inactive-pill {
  background: var(--bg-card);
  color: var(--text-muted);
}

.admin-session-status-filter-btn.inactive-pill:hover {
  background: var(--bg-app);
  color: var(--text-main);
  border-color: var(--primary);
}

.admin-session-status-filter-btn.active-pill {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.admin-session-status-filter-btn.active-pill-danger {
  background: linear-gradient(135deg, #ef4444, #f43f5e);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}

.admin-session-status-filter-btn.active-pill-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.admin-session-status-filter-btn.active-pill-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.tab-badge {
  background: rgba(255, 255, 255, 0.25);
  color: inherit;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 12px;
}

.inactive-pill .tab-badge {
  background: var(--bg-app);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.tab-badge-danger {
  background: rgba(255, 255, 255, 0.3);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 12px;
}

.inactive-pill .tab-badge-danger {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
}

.tab-badge-success {
  background: rgba(255, 255, 255, 0.3);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 12px;
}

.inactive-pill .tab-badge-success {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.tab-badge-warning {
  background: rgba(255, 255, 255, 0.3);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 12px;
}

.inactive-pill .tab-badge-warning {
  background: rgba(245, 158, 11, 0.12);
  color: #d97706;
}

/* --- STUDENT DASHBOARD MODERN STYLES --- */
.stat-card-hover {
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.25s ease;
}

.stat-card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.1);
  border-color: var(--border-focus) !important;
}

.filter-pill-btn {
  transition: all 0.2s ease;
}

.filter-pill-btn:hover:not(.active) {
  background: var(--bg-card-hover) !important;
  color: var(--primary) !important;
  border-color: var(--primary) !important;
}

@media (max-width: 992px) {
  .dashboard-main-grid-layout {
    grid-template-columns: 1fr !important;
  }
  
  .hero-student-banner,
  .hero-teacher-banner {
    padding: 24px 20px !important;
  }
}


/* --- COURSE STUDIO MODERN PLAYER STYLES --- */
@media (max-width: 1024px) {
  .course-studio-grid {
    grid-template-columns: 1fr !important;
  }

  .sidebar-curriculum-sticky {
    position: relative !important;
    top: 0 !important;
    max-height: none !important;
  }
}