/* ============================================================
   CBT Online - Main Stylesheet
   E-Learning Ujian Online Kampus
   ============================================================ */

/* =========== VARIABLES =========== */
:root {
  --primary: #2563eb;
  --primary-dark: #1e3a8a;
  --primary-light: #60a5fa;
  --secondary: #eab308;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #facc15;
  --info: #3b82f6;
  --dark: #1e293b;
  --darker: #0f172a;
  --body-bg: #f8fafc;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --sidebar-width: 270px;
  --sidebar-bg: #1e293b;
  --topbar-height: 65px;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 15px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--body-bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  font-size: 14px;
  line-height: 1.6;
}

/* =========== SCROLLBAR =========== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* =========== TYPOGRAPHY =========== */
h1, h2, h3, h4, h5, h6 { font-weight: 700; color: var(--text-primary); line-height: 1.3; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

/* =========== LAYOUT =========== */
.app-wrapper {
  display: flex;
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  width: calc(100% - var(--sidebar-width));
  min-width: 0;
}

/* =========== SIDEBAR =========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  border-right: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
  box-shadow: 4px 0 20px rgba(0,0,0,0.3);
}

.sidebar-brand {
  padding: 20px 20px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  background: rgba(37, 99, 235, 0.15);
}

.sidebar-brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(37,99,235,0.3);
}

.brand-name {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: white;
  letter-spacing: 0.3px;
}

.brand-sub {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.sidebar-user {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: rgba(255,255,255,0.02);
}

.sidebar-user-avatar {
  width: 38px;
  height: 38px;
  background: var(--secondary);
  color: var(--dark);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.sidebar-user-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.sidebar-user-role {
  background: rgba(79,70,229,0.3) !important;
  color: var(--primary-light) !important;
  font-size: 10px !important;
  border: 1px solid rgba(79,70,229,0.4);
  padding: 2px 8px !important;
  border-radius: 20px !important;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.sidebar-nav-header {
  padding: 12px 20px 6px;
  font-size: 10px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: white;
  transition: var(--transition);
  border-left: 3px solid transparent;
  font-size: 13.5px;
  font-weight: 500;
  margin: 1px 8px;
  border-radius: 8px;
}

.sidebar-nav-link i {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-nav-link:hover {
  color: white;
  background: rgba(255,255,255,0.08);
  transform: translateX(3px);
}

.sidebar-nav-link.active {
  color: var(--secondary);
  background: rgba(255,255,255,0.05);
  border-left-color: var(--secondary);
  border-left-width: 3px;
}

.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.logout-link {
  color: #f87171 !important;
}

.logout-link:hover {
  background: rgba(239, 68, 68, 0.15) !important;
  color: #f87171 !important;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 999;
}

/* =========== TOPBAR =========== */
.topbar {
  height: var(--topbar-height);
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
  width: 100%;
  overflow: visible !important;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.topbar-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 150px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 22px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.btn-sidebar-toggle:hover {
  background: #f1f5f9;
  color: var(--primary);
}

/* =========== PAGE CONTENT =========== */
.page-content {
  flex: 1;
  padding: 24px;
}

/* =========== CARDS =========== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  background: #ffffff !important;
  border-bottom: 1px solid var(--card-border) !important;
  padding: 16px 20px !important;
  font-weight: 700;
  color: var(--text-primary) !important;
}

.card-body { padding: 20px !important; }

/* =========== STAT CARDS =========== */
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-color, var(--primary));
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255,255,255,0.15);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  flex-shrink: 0;
  background: var(--stat-bg, rgba(79,70,229,0.15));
  color: var(--stat-color, var(--primary-light));
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

.stat-change {
  font-size: 12px;
  margin-top: 2px;
}

/* Stat color variants */
.stat-primary { --stat-color: #2563eb; --stat-bg: #eff6ff; }
.stat-success { --stat-color: #059669; --stat-bg: #ecfdf5; }
.stat-warning { --stat-color: #d97706; --stat-bg: #fffbeb; }
.stat-danger  { --stat-color: #dc2626; --stat-bg: #fef2f2; }
.stat-info    { --stat-color: #0284c7; --stat-bg: #f0f9ff; }
.stat-cyan    { --stat-color: #0891b2; --stat-bg: #ecfeff; }

/* =========== TABLES =========== */
.table {
  color: var(--text-primary);
  border-color: var(--card-border) !important;
}

.table thead th {
  background: #f8fafc !important;
  color: var(--text-secondary) !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  text-transform: uppercase !important;
  letter-spacing: 0.8px !important;
  border-bottom: 1px solid var(--card-border) !important;
  padding: 12px 16px !important;
  white-space: nowrap;
}

.table tbody td {
  border-bottom: 1px solid #f1f5f9 !important;
  padding: 12px 16px !important;
  vertical-align: middle;
  color: var(--text-primary) !important;
  word-break: break-word;
}

.table tbody tr {
  transition: var(--transition);
}

.table tbody tr:hover {
  background: #f8fafc !important;
}

.table-striped tbody tr:nth-of-type(odd) {
  background: #fbfcfe !important;
}

/* =========== FORMS =========== */
.form-control, .form-select {
  background: #ffffff !important;
  border: 1px solid #d1d5db !important;
  color: var(--text-primary) !important;
  border-radius: var(--radius-sm) !important;
  padding: 10px 14px !important;
  transition: var(--transition) !important;
  font-size: 14px !important;
}

.form-control:focus, .form-select:focus {
  background: #ffffff !important;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1) !important;
  color: var(--text-primary) !important;
  outline: none !important;
}

.form-control::placeholder { color: var(--text-muted) !important; }

.form-control option, .form-select option {
  background: #ffffff !important;
  color: var(--text-primary) !important;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-text { color: var(--text-muted) !important; font-size: 12px; }

.form-check-input {
  background-color: #ffffff !important;
  border-color: #d1d5db !important;
}

.form-check-input:checked {
  background-color: var(--primary) !important;
  border-color: var(--primary) !important;
}

/* =========== BUTTONS =========== */
.btn {
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  font-size: 13.5px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6366f1) !important;
  color: white !important;
  box-shadow: 0 4px 15px rgba(79,70,229,0.3) !important;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary)) !important;
  box-shadow: 0 6px 20px rgba(79,70,229,0.4) !important;
}

.btn-success {
  background: linear-gradient(135deg, #059669, #10b981) !important;
  color: white !important;
  box-shadow: 0 4px 15px rgba(16,185,129,0.3) !important;
}

.btn-danger {
  background: linear-gradient(135deg, #dc2626, #ef4444) !important;
  color: white !important;
  box-shadow: 0 4px 15px rgba(239,68,68,0.3) !important;
}

.btn-warning {
  background: linear-gradient(135deg, #d97706, #f59e0b) !important;
  color: white !important;
  box-shadow: 0 4px 15px rgba(245,158,11,0.3) !important;
}

.btn-info {
  background: linear-gradient(135deg, #0284c7, #3b82f6) !important;
  color: white !important;
}

.btn-secondary {
  background: rgba(255,255,255,0.08) !important;
  color: var(--text-secondary) !important;
  border: 1px solid var(--card-border) !important;
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.12) !important;
  color: white !important;
}

.btn-outline-primary {
  border: 1.5px solid var(--primary) !important;
  color: var(--primary-light) !important;
  background: transparent !important;
}

.btn-outline-primary:hover {
  background: rgba(79,70,229,0.12) !important;
  color: white !important;
}

.btn-sm { padding: 6px 12px !important; font-size: 12px !important; }
.btn-lg { padding: 13px 24px !important; font-size: 16px !important; }

/* =========== BADGES =========== */
.badge {
  font-weight: 600 !important;
  padding: 4px 10px !important;
  border-radius: 20px !important;
  font-size: 11px !important;
}

/* =========== ALERTS =========== */
.alert {
  border-radius: var(--radius-sm) !important;
  border: none !important;
  padding: 14px 18px !important;
  font-size: 14px;
}

.alert-success { background: rgba(16,185,129,0.15) !important; color: #34d399 !important; border-left: 4px solid #10b981 !important; }
.alert-danger { background: rgba(239,68,68,0.15) !important; color: #f87171 !important; border-left: 4px solid #ef4444 !important; }
.alert-warning { background: rgba(245,158,11,0.15) !important; color: #fbbf24 !important; border-left: 4px solid #f59e0b !important; }
.alert-info { background: rgba(59,130,246,0.15) !important; color: #60a5fa !important; border-left: 4px solid #3b82f6 !important; }

.modal-content {
  background: var(--card-bg) !important;
  border: 1px solid var(--card-border) !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-lg) !important;
}

/* =========== DROPDOWNS =========== */
.dropdown-menu {
  z-index: 2000 !important;
  box-shadow: var(--shadow-lg) !important;
  border: 1px solid var(--card-border) !important;
}

.modal-header {
  border-bottom: 1px solid var(--card-border) !important;
  padding: 20px 24px !important;
}

.modal-title { color: var(--text-primary) !important; font-weight: 700; }

.modal-body { padding: 24px !important; }

.modal-footer {
  border-top: 1px solid var(--card-border) !important;
  padding: 16px 24px !important;
}

.btn-close {
  filter: invert(1) !important;
  opacity: 0.7 !important;
}

/* =========== PAGINATION =========== */
.page-link {
  background: rgba(255,255,255,0.05) !important;
  border-color: var(--card-border) !important;
  color: var(--text-secondary) !important;
  border-radius: var(--radius-sm) !important;
  margin: 0 2px !important;
}

.page-link:hover {
  background: rgba(79,70,229,0.2) !important;
  color: white !important;
}

.page-item.active .page-link {
  background: var(--primary) !important;
  border-color: var(--primary) !important;
  color: white !important;
}

/* =========== BREADCRUMB =========== */
.breadcrumb {
  background: none !important;
  padding: 0 !important;
  margin-bottom: 8px !important;
}

.breadcrumb-item { font-size: 12px; color: var(--text-muted); }
.breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted) !important; content: "/" !important; }
.breadcrumb-item.active { color: var(--text-muted) !important; }
.breadcrumb-item a { color: var(--primary-light); }

/* =========== PAGE HEADER =========== */
.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
}

.page-header p {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 4px;
}

/* =========== ACTIVE EXAM PANEL =========== */
.exam-active-panel {
  background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(6,182,212,0.1));
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-lg);
  padding: 20px;
  animation: pulse-border 3s infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: rgba(16,185,129,0.3); }
  50% { border-color: rgba(16,185,129,0.7); }
}

.exam-active-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16,185,129,0.2);
  color: #34d399;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid rgba(16,185,129,0.4);
}

.exam-active-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #34d399;
  border-radius: 50%;
  animation: blink 1.2s infinite;
}

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

/* =========== EXAM CARD =========== */
.exam-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.exam-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-color, linear-gradient(90deg, var(--primary), var(--secondary)));
}

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

.exam-card-body { padding: 20px; }

.exam-card-title {
  font-size: 16px;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}

.exam-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

.exam-card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* =========== QUESTION STATUS LEGEND =========== */
.status-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 4px;
}

.status-dot.unanswered { background: #4b5563; }
.status-dot.flagged { background: #f59e0b; }
.status-dot.answered { background: #10b981; }

/* =========== QUESTION NAVIGATION =========== */
.question-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 16px;
}

.q-btn {
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.q-btn.unanswered {
  background: #ffffff;
  color: var(--text-secondary);
  border: 1px solid #e2e8f0;
}

.q-btn.flagged {
  background: rgba(245,158,11,0.2);
  color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.4);
}

.q-btn.answered {
  background: rgba(16,185,129,0.2);
  color: #34d399;
  border: 1px solid rgba(16,185,129,0.4);
}

.q-btn.current {
  background: var(--primary) !important;
  color: white !important;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(79,70,229,0.3) !important;
  transform: scale(1.1);
}

.q-btn:hover:not(.current) {
  transform: scale(1.05);
  opacity: 0.85;
}

/* =========== EXAM PAGE =========== */
.exam-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  min-height: calc(100vh - 120px);
}

.exam-main-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.exam-sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.exam-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.exam-question-area {
  padding: 28px;
  min-height: 400px;
}

.question-number {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: 16px;
}

.question-type-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  margin-left: 10px;
}

.question-text {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.answer-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.answer-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.answer-option:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.answer-option.selected {
  background: #eff6ff;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(37,99,235,0.1);
}

.answer-option input[type="radio"] {
  display: none;
}

.option-label {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
  background: #e2e8f0;
  color: var(--text-secondary);
  transition: var(--transition);
}

.answer-option.selected .option-label {
  background: var(--primary);
  color: white;
}

.option-text {
  flex: 1;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
  transition: var(--transition);
}

.answer-option.selected .option-text {
  color: var(--text-primary);
  font-weight: 600;
}

/* TF Options */
.tf-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.tf-option {
  padding: 20px;
  border-radius: var(--radius);
  border: 2px solid #e2e8f0;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  background: #ffffff;
}

.tf-option.true-opt:hover {
  border-color: #10b981;
  background: rgba(16,185,129,0.1);
  color: #34d399;
}

.tf-option.false-opt:hover {
  border-color: #ef4444;
  background: rgba(239,68,68,0.1);
  color: #f87171;
}

.tf-option.selected-true {
  background: rgba(16,185,129,0.2) !important;
  border-color: #10b981 !important;
  color: #34d399 !important;
}

.tf-option.selected-false {
  background: rgba(239,68,68,0.2) !important;
  border-color: #ef4444 !important;
  color: #f87171 !important;
}

/* Essay textarea */
.essay-textarea {
  width: 100%;
  min-height: 180px;
  background: #ffffff !important;
  border: 1.5px solid #d1d5db !important;
  color: var(--text-primary) !important;
  border-radius: 10px !important;
  padding: 14px !important;
  resize: vertical;
  font-size: 14px !important;
  line-height: 1.7 !important;
  transition: var(--transition) !important;
}

.essay-textarea:focus {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1) !important;
  outline: none !important;
}

/* Exam navigation */
.exam-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-top: 1px solid var(--card-border);
  background: #f8fafc;
}

/* Timer */
.timer-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
}

.timer-display {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 3px;
  font-variant-numeric: tabular-nums;
}

.timer-display.warning { color: #fbbf24; animation: pulse 1s infinite; }
.timer-display.danger { color: #f87171; animation: pulse 0.5s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.timer-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* Flag button */
.btn-flag {
  background: rgba(245,158,11,0.15) !important;
  border: 1.5px solid rgba(245,158,11,0.4) !important;
  color: #fbbf24 !important;
}

.btn-flag.flagged {
  background: rgba(245,158,11,0.3) !important;
  border-color: #f59e0b !important;
}

/* =========== CALCULATOR =========== */
.calculator-float {
  position: fixed;
  bottom: 90px;
  right: 24px;
  width: 280px;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  border: 1px solid #e2e8f0;
  z-index: 9999;
  display: none;
  overflow: hidden;
  animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: move;
  user-select: none;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.calculator-float.show { display: block; }

.calc-header {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: move;
}

.calc-header-title {
  font-size: 13px;
  font-weight: 700;
  color: white;
}

.calc-close {
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: var(--transition);
}

.calc-close:hover { color: white; }

.calc-display {
  background: #f8fafc;
  padding: 16px;
  text-align: right;
  border-bottom: 1px solid #e2e8f0;
}

.calc-display-expr {
  font-size: 12px;
  color: var(--text-muted);
  min-height: 18px;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calc-display-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.2;
}

.calc-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px;
}

.calc-btn {
  height: 50px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.calc-btn:hover { transform: scale(0.95); opacity: 0.85; }
.calc-btn:active { transform: scale(0.9); }

.calc-btn.num {
  background: #f1f5f9;
  color: var(--text-primary);
}

.calc-btn.op {
  background: #eff6ff;
  color: var(--primary);
}

.calc-btn.eq {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: white;
  grid-column: span 2;
}

.calc-btn.clear {
  background: rgba(239,68,68,0.2);
  color: #f87171;
}

.calc-btn.del {
  background: rgba(245,158,11,0.2);
  color: #fbbf24;
}

.calc-btn.zero { grid-column: span 2; }

/* Calculator toggle button */
.calc-toggle-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  border: none;
  border-radius: 50%;
  font-size: 22px;
  color: white;
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(79,70,229,0.5);
  transition: var(--transition);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calc-toggle-btn:hover {
  transform: scale(1.1) rotate(10deg);
  box-shadow: 0 12px 35px rgba(79,70,229,0.6);
}

/* =========== LOGIN PAGE =========== */
.login-page {
  min-height: 100vh;
  background: #f1f5f9;
  background-image: radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.1) 0, transparent 50%), radial-gradient(at 50% 0%, rgba(234, 179, 8, 0.1) 0, transparent 50%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 20px;
}

.login-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
}

.login-bg-orb:nth-child(1) {
  width: 400px; height: 400px;
  background: var(--primary);
  top: -100px; left: -100px;
}

.login-bg-orb:nth-child(2) {
  width: 350px; height: 350px;
  background: var(--secondary);
  bottom: -100px; right: -100px;
  animation-delay: -3s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.login-card {
  width: 100%;
  max-width: 460px;
  background: #ffffff;
  border-radius: 24px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 20px 50px rgba(0,0,0,0.05);
  padding: 48px 40px;
  position: relative;
  z-index: 1;
  animation: slideInUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-logo {
  width: 70px;
  height: 70px;
  background: var(--primary);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  margin: 0 auto 24px;
  box-shadow: 0 10px 30px rgba(37,99,235,0.2);
}

.login-title {
  font-size: 26px;
  font-weight: 800;
  text-align: center;
  color: var(--dark);
  margin-bottom: 8px;
}

.login-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 32px;
}

.login-demo-accounts {
  background: rgba(79,70,229,0.1);
  border: 1px solid rgba(79,70,229,0.3);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 20px;
}

.demo-account-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 12px;
  cursor: pointer;
  border-radius: 6px;
  padding: 6px 8px;
  transition: var(--transition);
}

.demo-account-item:hover {
  background: rgba(79,70,229,0.1);
}

/* =========== RESULT PAGE =========== */
.result-score-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border: 6px solid;
  position: relative;
}

.result-score-circle.lulus {
  border-color: #10b981;
  box-shadow: 0 0 30px rgba(16,185,129,0.4), inset 0 0 30px rgba(16,185,129,0.1);
  background: rgba(16,185,129,0.08);
}

.result-score-circle.tidak-lulus {
  border-color: #ef4444;
  box-shadow: 0 0 30px rgba(239,68,68,0.4), inset 0 0 30px rgba(239,68,68,0.1);
  background: rgba(239,68,68,0.08);
}

.result-score-value {
  font-size: 40px;
  font-weight: 900;
  line-height: 1;
}

.result-score-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 4px;
}

/* =========== MISC UTILITIES =========== */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glassmorphism {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
}

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

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

/* Input group bright */
.input-group-text {
  background: #f8fafc !important;
  border-color: #d1d5db !important;
  color: var(--text-muted) !important;
}

/* Dropdown */
.dropdown-menu {
  background: var(--card-bg) !important;
  border: 1px solid var(--card-border) !important;
  border-radius: var(--radius) !important;
  box-shadow: var(--shadow-lg) !important;
}

.dropdown-item {
  color: var(--text-secondary) !important;
  font-size: 13px !important;
  padding: 8px 16px !important;
  transition: var(--transition) !important;
}

.dropdown-item:hover {
  background: #eff6ff !important;
  color: var(--primary) !important;
}

.dropdown-divider { border-color: var(--card-border) !important; }

/* Nav tabs */
.nav-tabs {
  border-bottom: 1px solid var(--card-border) !important;
}

.nav-tabs .nav-link {
  color: var(--text-muted) !important;
  border: none !important;
  padding: 10px 20px !important;
  font-weight: 600 !important;
  font-size: 13px !important;
  border-bottom: 2px solid transparent !important;
  border-radius: 0 !important;
  transition: var(--transition) !important;
}

.nav-tabs .nav-link:hover {
  color: var(--text-primary) !important;
  border-bottom-color: rgba(79,70,229,0.5) !important;
}

.nav-tabs .nav-link.active {
  color: var(--primary-light) !important;
  background: none !important;
  border-bottom-color: var(--primary) !important;
}

/* Koreksi Essay */
.essay-answer-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 16px;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 80px;
  white-space: pre-wrap;
}

/* =========== RESPONSIVE =========== */
@media (max-width: 1024px) {
  :root { --sidebar-width: 260px; }
  
  .exam-layout {
    grid-template-columns: 1fr;
  }
  
  .exam-sidebar-panel {
    order: -1;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 1001;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .sidebar-overlay.show {
    display: block;
  }
  
  .main-content {
    margin-left: 0;
    width: 100%;
  }
  
  .btn-sidebar-toggle {
    display: block !important;
  }
  
  .page-content { padding: 12px; }
  
  .stat-card { 
      padding: 12px; 
      gap: 12px;
  }
  .stat-icon {
      width: 40px;
      height: 40px;
      font-size: 18px;
  }
  .stat-value { font-size: 20px; }
  .stat-label { font-size: 11px; }
  
  .login-card { padding: 32px 24px; }
  
  .topbar { padding: 0 16px; }
  
  .calculator-float {
    width: 260px;
    right: 12px;
    bottom: 80px;
  }
  
  .calc-toggle-btn {
    right: 12px;
    bottom: 16px;
    width: 48px;
    height: 48px;
    font-size: 20px;
  }
  
  .exam-question-area { padding: 20px 16px; }
  .exam-nav { padding: 12px 16px; }
  
  .tf-options { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .topbar-title { font-size: 14px; }
}

/* =========== PRINT =========== */
@media print {
  .sidebar, .topbar, .btn, .calculator-float, .calc-toggle-btn { display: none !important; }
  .main-content { margin: 0 !important; }
  body { background: white !important; color: black !important; }
  .card { border: 1px solid #ddd !important; background: white !important; }
}