:root {
  --lmu-green: #00883A;
  --lmu-green-dark: #00662A;
  --lmu-green-light: #E6F4EA;
  --lmu-accent: #10B981;
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-300: #CBD5E1;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;
  --danger: #DC2626;
  --danger-light: #FEE2E2;
  --success: #16A34A;
  --success-light: #DCFCE7;
  --warning: #D97706;
  --warning-light: #FEF3C7;
  --card-shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --modal-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--slate-100);
  color: var(--slate-800);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  background-color: #FFFFFF;
  border-bottom: 2px solid var(--slate-200);
  padding: 0.85rem 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lmu-badge {
  background-color: var(--lmu-green);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.15rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  letter-spacing: 0.5px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.lmu-badge:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  color: #FFFFFF;
}

.header-title-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

.header-title-link:hover {
  color: var(--lmu-green);
}

.header-jst-link {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px dotted rgba(100, 116, 139, 0.5);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.header-jst-link:hover {
  color: var(--lmu-green);
  border-bottom-color: var(--lmu-green);
}

.logo-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--slate-900);
  line-height: 1.2;
}

.logo-text p {
  font-size: 0.8rem;
  color: var(--slate-500);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--slate-600);
  text-decoration: none;
  padding: 0.45rem 0.85rem;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.nav-link:hover {
  background-color: var(--slate-100);
  color: var(--lmu-green);
}

.main-content {
  max-width: 1200px;
  width: 100%;
  margin: 1.75rem auto;
  padding: 0 1rem;
  flex: 1;
}

/* Cards */
.card {
  background: #FFFFFF;
  border-radius: 12px;
  border: 1px solid var(--slate-200);
  box-shadow: var(--card-shadow);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

/* Rule Banner */
.rule-banner {
  background: linear-gradient(135deg, #00883A 0%, #005A24 100%);
  color: #FFFFFF;
  padding: 1.75rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: var(--card-shadow);
}

.rule-banner h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.rule-banner p {
  font-size: 0.95rem;
  opacity: 0.95;
  line-height: 1.5;
}

/* Live Active Pulse Banner */
.live-topic-alert {
  background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
  border: 2px solid #EF4444;
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: #DC2626;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 0.4rem;
}

.form-input, .form-select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--slate-300);
  border-radius: 8px;
  background-color: #FFFFFF;
  color: var(--slate-900);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--lmu-green);
  box-shadow: 0 0 0 3px rgba(0, 136, 58, 0.15);
}

.input-group {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--slate-300);
  border-radius: 8px;
  overflow: hidden;
  background: #FFFFFF;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input-group:focus-within {
  border-color: var(--lmu-green);
  box-shadow: 0 0 0 3px rgba(0, 136, 58, 0.15);
}

.input-group .input-group-field {
  flex: 1;
  border: none;
  outline: none;
  padding: 0.65rem 0.85rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--slate-900);
  background: transparent;
  min-width: 0;
}

.input-group .input-group-addon {
  display: flex;
  align-items: center;
  padding: 0 0.85rem;
  background: var(--slate-100);
  color: var(--slate-700);
  font-size: 0.9rem;
  font-weight: 600;
  border-left: 1px solid var(--slate-200);
  user-select: none;
  white-space: nowrap;
}

.form-row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 640px) {
  .form-row-2col {
    grid-template-columns: 1fr;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: var(--lmu-green);
  color: #FFFFFF;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--lmu-green-dark);
}

.btn-primary:disabled {
  background-color: var(--slate-300);
  color: var(--slate-500);
  cursor: not-allowed;
}

.btn-secondary {
  background-color: var(--slate-100);
  color: var(--slate-700);
  border: 1px solid var(--slate-300);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--slate-200);
  color: var(--slate-900);
}

.btn-danger {
  background-color: var(--danger);
  color: #FFFFFF;
}

.btn-danger:hover {
  background-color: #B91C1C;
}

.btn-block {
  width: 100%;
}

/* Topic Grid (Student Dashboard) */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.topic-card {
  background: #FFFFFF;
  border-radius: 12px;
  border: 1px solid var(--slate-200);
  padding: 1.25rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  position: relative;
}

.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0,0,0,0.08);
  border-color: var(--lmu-green);
}

.topic-card.live-active {
  border: 2px solid var(--lmu-green);
  background: linear-gradient(180deg, #F0FDF4 0%, #FFFFFF 60%);
}

.topic-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.3px;
}

.badge-not-started {
  background-color: var(--slate-100);
  color: var(--slate-600);
}

.badge-in-progress {
  background-color: #FEF3C7;
  color: #B45309;
}

.badge-completed {
  background-color: var(--lmu-green-light);
  color: var(--lmu-green-dark);
}

/* Quiz Interface */
.quiz-header {
  background: #FFFFFF;
  border-radius: 12px;
  border: 1px solid var(--slate-200);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--card-shadow);
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.category-tag {
  background-color: var(--lmu-green-light);
  color: var(--lmu-green-dark);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
}

.score-tag {
  background-color: var(--slate-100);
  color: var(--slate-700);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
}

.progress-bar-container {
  height: 8px;
  background-color: var(--slate-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--lmu-green) 0%, #10B981 100%);
  transition: width 0.3s ease;
}

.question-card {
  background: #FFFFFF;
  border-radius: 12px;
  border: 1px solid var(--slate-200);
  box-shadow: var(--card-shadow);
  padding: 2rem;
}

.question-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--slate-900);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  background-color: var(--slate-50);
  border: 2px solid var(--slate-200);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--lmu-green);
  background-color: #F0FDF4;
}

.option-btn.selected {
  border-color: var(--lmu-green);
  background-color: var(--lmu-green-light);
  box-shadow: 0 0 0 2px var(--lmu-green);
}

.option-btn.correct-highlight {
  border-color: var(--success) !important;
  background-color: var(--success-light) !important;
  color: #14532D !important;
  font-weight: 600;
}

.option-btn.wrong-highlight {
  border-color: var(--danger) !important;
  background-color: var(--danger-light) !important;
  color: #7F1D1D !important;
}

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #FFFFFF;
  border: 2px solid var(--slate-300);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--slate-700);
  flex-shrink: 0;
}

.option-btn.selected .option-letter {
  background-color: var(--lmu-green);
  border-color: var(--lmu-green);
  color: #FFFFFF;
}

.option-btn.correct-highlight .option-letter {
  background-color: var(--success);
  border-color: var(--success);
  color: #FFFFFF;
}

.option-btn.wrong-highlight .option-letter {
  background-color: var(--danger);
  border-color: var(--danger);
  color: #FFFFFF;
}

.explanation-box {
  background-color: #F8FAFC;
  border-left: 5px solid var(--lmu-green);
  border-radius: 8px;
  padding: 1.25rem;
  margin-top: 1.5rem;
}

.explanation-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.explanation-text {
  font-size: 0.95rem;
  color: var(--slate-700);
  line-height: 1.55;
}

.timer-notice {
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  background: #FFFBEB;
  border: 1px solid #FCD34D;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  color: #92400E;
}

.countdown-badge {
  background: #D97706;
  color: #FFFFFF;
  padding: 0.2rem 0.55rem;
  border-radius: 12px;
  font-weight: 800;
}

/* Tabs */
.tab-container {
  display: flex;
  border-bottom: 2px solid var(--slate-200);
  margin-bottom: 1.5rem;
  gap: 0.5rem;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--slate-600);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--lmu-green);
}

.tab-btn.active {
  color: var(--lmu-green);
  border-bottom-color: var(--lmu-green);
}

/* Data Table */
.data-table-container {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--slate-200);
  background: #FFFFFF;
  box-shadow: var(--card-shadow);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.data-table th {
  background-color: var(--slate-50);
  padding: 0.85rem 1rem;
  font-weight: 700;
  color: var(--slate-700);
  border-bottom: 2px solid var(--slate-200);
  white-space: nowrap;
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--slate-200);
  color: var(--slate-800);
}

.data-table tr:hover {
  background-color: #F8FAFC;
}

/* KPI Summary Cards */
.admin-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: #FFFFFF;
  border-radius: 10px;
  border: 1px solid var(--slate-200);
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.kpi-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.3rem;
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--slate-900);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 1rem;
}

.modal-content {
  background: #FFFFFF;
  border-radius: 14px;
  padding: 2rem;
  width: 100%;
  max-width: 600px;
  box-shadow: var(--modal-shadow);
}

.modal-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 1rem;
}

/* Beamer Presentation Styles */
.beamer-card {
  background: #FFFFFF;
  border-radius: 16px;
  border: 2px solid var(--slate-200);
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
  padding: 2.25rem;
  margin-bottom: 2rem;
}

.beamer-question-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--slate-900);
  line-height: 1.4;
  margin-bottom: 1.75rem;
}

.beamer-option-row {
  margin-bottom: 1rem;
}

.beamer-option-header {
  display: flex;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.beamer-bar-container {
  height: 24px;
  background-color: var(--slate-100);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--slate-200);
  display: flex;
}

.beamer-bar-fill {
  height: 100%;
  transition: width 0.5s ease-out;
  display: flex;
  align-items: center;
  padding-left: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #FFFFFF;
}

.bar-correct {
  background: linear-gradient(90deg, #16A34A 0%, #22C55E 100%);
}

.bar-wrong {
  background: linear-gradient(90deg, #DC2626 0%, #EF4444 100%);
}

.bar-neutral {
  background: linear-gradient(90deg, #3B82F6 0%, #60A5FA 100%);
}