@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Rajdhani:wght@500;600;700&display=swap');

:root {
  --bg:        #0a0a0a;
  --bg2:       #111111;
  --bg3:       #1a1a1a;
  --border:    #2a2a2a;
  --border2:   #333333;
  --accent:    #e8e8e8;
  --accent2:   #aaaaaa;
  --muted:     #555555;
  --gold:      #3b82f6;
  --gold2:     #2563eb;
  --success:   #4caf50;
  --danger:    #f44336;
  --warning:   #ff9800;
  --info:      #2196f3;
  --text:      #e8e8e8;
  --text2:     #999999;
  --text3:     #555555;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  /* grid background */
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ===== TOPBAR ===== */
.topbar {
  height: 56px;
  background: rgba(10,10,10,0.95);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

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

.topbar-logo svg { display: block; }

.topbar-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 3px;
  text-transform: uppercase;
  line-height: 1.2;
}

.topbar-title span {
  display: block;
  font-size: 0.6rem;
  color: var(--text3);
  letter-spacing: 4px;
  font-weight: 500;
}

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

.topbar-user {
  font-size: 0.8rem;
  color: var(--text3);
}

.topbar-user strong { color: var(--text2); }

/* ===== BUTTONS ===== */
.btn {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  white-space: nowrap;
}

.btn i { font-size: 0.85rem; }

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover { background: #cccccc; border-color: #cccccc; }

.btn-blue {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}
.btn-blue:hover { background: #60a5fa; border-color: #60a5fa; }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: #3a1a1a;
}
.btn-danger:hover { background: rgba(244,67,54,0.1); border-color: var(--danger); }

.btn-success {
  background: transparent;
  color: var(--success);
  border-color: #1a3a1a;
}
.btn-success:hover { background: rgba(76,175,80,0.1); border-color: var(--success); }

.btn-outline {
  background: transparent;
  color: var(--text2);
  border-color: var(--border2);
}
.btn-outline:hover { border-color: var(--muted); color: var(--text); }

.btn-sm { padding: 5px 12px; font-size: 0.78rem; }
.btn-sm i { font-size: 0.78rem; }

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== LOGIN PAGE ===== */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
}

.login-page::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(59,130,246,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.login-hero {
  text-align: center;
  margin-bottom: 32px;
}

.login-badge {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  opacity: 0.9;
}

.login-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 8px;
  text-transform: uppercase;
}

.login-subtitle {
  font-size: 0.72rem;
  color: var(--text3);
  letter-spacing: 4px;
  margin-top: 4px;
  text-transform: uppercase;
}

.login-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
  width: 100%;
  max-width: 400px;
  position: relative;
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.login-card h2 {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text3);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 24px;
  text-align: center;
}

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text3);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 9px 12px;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  transition: border-color 0.15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--muted);
  background: #1e1e1e;
}

.form-control::placeholder { color: var(--text3); }

select.form-control option { background: var(--bg3); color: var(--text); }

textarea.form-control { resize: vertical; min-height: 90px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.form-hint { font-size: 0.75rem; color: var(--text3); margin-top: 4px; }

/* ===== ALERTS ===== */
.alert {
  padding: 10px 14px;
  border-radius: 3px;
  font-size: 0.84rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert i { font-size: 0.9rem; flex-shrink: 0; }

.alert-danger  { background: rgba(244,67,54,0.08);  border: 1px solid rgba(244,67,54,0.25);  color: #ff8a80; }
.alert-success { background: rgba(76,175,80,0.08);  border: 1px solid rgba(76,175,80,0.25);  color: #a5d6a7; }
.alert-info    { background: rgba(33,150,243,0.08); border: 1px solid rgba(33,150,243,0.25); color: #90caf9; }
.alert-warning { background: rgba(255,152,0,0.08);  border: 1px solid rgba(255,152,0,0.25);  color: #ffcc80; }

/* ===== DASHBOARD LAYOUT ===== */
.dashboard { display: flex; min-height: calc(100vh - 56px); }

.sidebar {
  width: 220px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 16px 0;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-label {
  font-size: 0.65rem;
  letter-spacing: 2px;
  color: var(--text3);
  text-transform: uppercase;
  padding: 8px 16px 4px;
  display: block;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  cursor: pointer;
  color: var(--text3);
  font-size: 0.84rem;
  font-weight: 500;
  transition: all 0.15s;
  text-decoration: none;
  border-left: 2px solid transparent;
  margin: 1px 0;
}

.sidebar-item i { width: 16px; text-align: center; font-size: 0.85rem; }

.sidebar-item:hover { color: var(--text2); background: rgba(255,255,255,0.03); }

.sidebar-item.active {
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border-left-color: var(--gold);
}

.sidebar-divider { border: none; border-top: 1px solid var(--border); margin: 8px 16px; }

.main-content { flex: 1; padding: 28px; overflow-y: auto; }

/* ===== PAGE HEADER ===== */
.page-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header-left h1 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 1px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-header-left h1 i { color: var(--gold); font-size: 1.1rem; }

.page-header-left p { color: var(--text3); font-size: 0.82rem; margin-top: 4px; }

/* ===== STATS CARDS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
}

.stat-card.blue::after  { background: var(--info); }
.stat-card.gold::after  { background: var(--gold); }
.stat-card.green::after { background: var(--success); }
.stat-card.red::after   { background: var(--danger); }

.stat-icon { font-size: 1.4rem; margin-bottom: 10px; }
.stat-icon i { color: var(--text3); }
.stat-card.blue  .stat-icon i { color: var(--info); }
.stat-card.gold  .stat-icon i { color: var(--gold); }
.stat-card.green .stat-icon i { color: var(--success); }
.stat-card.red   .stat-icon i { color: var(--danger); }

.stat-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text3);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 4px;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 20px;
}

.card-header {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.01);
}

.card-header h3 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text2);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header h3 i { color: var(--gold); }

.card-body { padding: 18px; }

/* ===== TABLES ===== */
.table-wrapper { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }

thead th {
  background: rgba(255,255,255,0.02);
  padding: 10px 14px;
  text-align: left;
  font-size: 0.68rem;
  letter-spacing: 1.5px;
  color: var(--text3);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  font-weight: 600;
}

tbody tr { border-bottom: 1px solid rgba(42,42,42,0.6); transition: background 0.1s; }
tbody tr:hover { background: rgba(255,255,255,0.02); }
tbody td { padding: 10px 14px; color: var(--text2); vertical-align: middle; }
tbody tr:last-child { border-bottom: none; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-active   { background: rgba(76,175,80,0.1);   color: #81c784; border: 1px solid rgba(76,175,80,0.2); }
.badge-inactive { background: rgba(244,67,54,0.1);   color: #e57373; border: 1px solid rgba(244,67,54,0.2); }
.badge-pending  { background: rgba(255,152,0,0.1);   color: #ffb74d; border: 1px solid rgba(255,152,0,0.2); }
.badge-admin    { background: rgba(59,130,246,0.1);  color: var(--gold); border: 1px solid rgba(59,130,246,0.2); }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(3px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
}

.modal-overlay.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
  position: relative;
  transform: translateY(12px);
  transition: transform 0.15s;
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-header h3 i { color: var(--gold); }

.modal-close {
  background: none;
  border: none;
  color: var(--text3);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color 0.15s;
}

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

.modal-body { padding: 20px; }

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ===== EXAM CARDS ===== */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.exam-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}

.exam-card:hover { border-color: var(--border2); transform: translateY(-1px); }

.exam-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 2px; height: 100%;
  background: var(--muted);
}

.exam-card.gold::before { background: var(--gold); }

.exam-card-icon { font-size: 1.6rem; margin-bottom: 12px; color: var(--text3); }
.exam-card-icon i { color: var(--text3); }
.exam-card.gold .exam-card-icon i { color: var(--gold); }

.exam-card-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.exam-card-desc { font-size: 0.82rem; color: var(--text3); line-height: 1.5; margin-bottom: 14px; }

.exam-card-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.exam-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  color: var(--text3);
}

.exam-meta-item i { font-size: 0.7rem; color: var(--muted); }
.exam-meta-item span { color: var(--text2); font-weight: 500; }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: 48px 20px; color: var(--text3); }
.empty-state-icon { font-size: 2.5rem; margin-bottom: 12px; opacity: 0.3; }
.empty-state-icon i { color: var(--text3); }

.empty-state h3 {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.85rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--text3);
}

.empty-state p { font-size: 0.82rem; }

/* ===== QUESTION BUILDER ===== */
.question-item {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 14px;
  margin-bottom: 10px;
}

.question-item .question-num {
  font-size: 0.68rem;
  color: var(--gold);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.answer-option { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.answer-option input[type="radio"] { accent-color: var(--gold); width: 14px; height: 14px; cursor: pointer; flex-shrink: 0; }
.answer-option .form-control { flex: 1; padding: 7px 10px; }
.correct-label { font-size: 0.7rem; color: var(--success); white-space: nowrap; opacity: 0.4; }

/* ===== EXAM TAKING ===== */
.exam-progress-bar { background: var(--border); border-radius: 2px; height: 3px; margin-bottom: 24px; overflow: hidden; }
.exam-progress-fill { height: 100%; background: var(--gold); border-radius: 2px; transition: width 0.3s ease; }

.exam-timer {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 3px;
}

.exam-timer.warning { color: var(--warning); }
.exam-timer.danger  { color: var(--danger); animation: pulse 0.6s infinite; }

.question-block {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px;
  margin-bottom: 16px;
}

.question-block .q-number {
  font-size: 0.68rem;
  color: var(--gold);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.question-block .q-text { font-size: 0.95rem; font-weight: 500; color: var(--text); margin-bottom: 16px; line-height: 1.5; }

.answer-choice {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 3px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.12s;
}

.answer-choice:hover { border-color: var(--border2); background: rgba(255,255,255,0.02); }
.answer-choice.selected { border-color: var(--gold); background: rgba(59,130,246,0.06); }
.answer-choice.correct  { border-color: var(--success); background: rgba(76,175,80,0.08); }
.answer-choice.wrong    { border-color: var(--danger);  background: rgba(244,67,54,0.08); }

.answer-choice input[type="radio"] { accent-color: var(--gold); width: 15px; height: 15px; flex-shrink: 0; }
.answer-choice label { cursor: pointer; font-size: 0.88rem; color: var(--text2); flex: 1; }

/* ===== RESULT SCREEN ===== */
.result-screen { text-align: center; padding: 40px 20px; }
.result-icon { font-size: 3.5rem; margin-bottom: 16px; }
.result-icon i { color: var(--text3); }

.result-score { font-family: 'Rajdhani', sans-serif; font-size: 4rem; font-weight: 700; margin-bottom: 8px; line-height: 1; }
.result-score.pass { color: var(--success); }
.result-score.fail { color: var(--danger); }

.result-label { font-size: 0.82rem; color: var(--text3); margin-bottom: 24px; letter-spacing: 1px; }

.result-details {
  display: inline-flex;
  gap: 24px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px 32px;
  margin-bottom: 24px;
}

.result-detail-item { text-align: center; }

.result-detail-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}

.result-detail-label { font-size: 0.68rem; color: var(--text3); letter-spacing: 1px; text-transform: uppercase; margin-top: 3px; }

/* ===== MISC ===== */
.section-divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

.open-hint { margin-top: 8px; }

code {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  background: rgba(255,255,255,0.05);
  padding: 2px 6px;
  border-radius: 2px;
  color: var(--gold);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.2s ease forwards; }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.pulse { animation: pulse 1.5s infinite; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .dashboard { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); padding: 8px 0; }
  .main-content { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .login-card { padding: 24px 16px; }
  .page-header { flex-direction: column; }
  .result-details { gap: 16px; padding: 14px 20px; }
}