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

:root {
  --bg-primary: #121212;
  --bg-secondary: #1A1A1A;
  --bg-card: #222222;
  --bg-card-hover: #2a2a2a;
  --bg-input: #161616;
  --border: #333333;
  --border-focus: #FF5A1F;
  --text-primary: #f0f0f0;
  --text-secondary: #B0B0B0;
  --text-muted: #777777;
  --accent: #FF5A1F;
  --accent-hover: #E14A10;
  --accent-glow: rgba(255, 90, 31, 0.12);
  --accent-subtle: rgba(255, 90, 31, 0.06);
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 4px 32px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

/* ===== LAYOUT ===== */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.sidebar-brand {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.sidebar-brand img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
}

.sidebar-brand .brand-text {
  display: flex;
  flex-direction: column;
}

.sidebar-brand .brand-text h1 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.sidebar-brand .brand-text span {
  font-size: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin-top: 2px;
}

.sidebar-nav { flex: 1; padding: 8px 12px; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.sidebar-nav a:hover { background: var(--bg-card); color: var(--text-primary); }
.sidebar-nav a.active { background: var(--accent-glow); color: var(--accent); }

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.sidebar-footer .user-info {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.sidebar-footer .user-name { color: var(--text-primary); font-weight: 600; }

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 32px 40px;
  min-height: 100vh;
}

.page-header { margin-bottom: 32px; }

.page-header h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-header h3 { font-size: 16px; font-weight: 600; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.5;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.stat-card .stat-value.success { color: var(--success); }
.stat-card .stat-value.accent { color: var(--accent); }

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(255,90,31,0.3); }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(1.1); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-card); color: var(--text-primary); }

.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid rgba(51, 51, 51, 0.6);
}

tr:hover td { background: var(--accent-subtle); }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--accent-glow); color: var(--accent); }

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: flex-start;
  padding-top: 60px;
  overflow-y: auto;
}
.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  margin-bottom: 40px;
}

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

.modal-header h3 { font-size: 18px; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
}
.modal-close:hover { color: var(--text-primary); }

.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ===== LOGIN ===== */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg-primary);
  position: relative;
}

.login-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,90,31,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,90,31,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.login-logo img { width: 100px; height: 100px; border-radius: 14px; object-fit: cover; }

.login-card .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 28px;
  text-align: center;
}

.login-card .btn { width: 100%; justify-content: center; padding: 12px; }

.login-error {
  background: var(--danger-bg);
  border: 1px solid rgba(239,68,68,0.2);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}

/* ===== TRAINING PAGE ===== */
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.video-container iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
}

.question-card .q-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.question-card .q-text {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 14px;
}

.option-group { display: flex; flex-direction: column; gap: 8px; }

.option-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 14px;
}
.option-label:hover { border-color: var(--accent); background: var(--accent-glow); }
.option-label input { accent-color: var(--accent); }

.fill-blank-input {
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  width: 100%;
}
.fill-blank-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.question-card.correct { border-color: var(--success); }
.question-card.incorrect { border-color: var(--danger); }
.correct-answer-text { color: var(--success); font-size: 13px; margin-top: 8px; }

/* ===== PROGRESS BAR ===== */
.progress-bar-wrap {
  background: var(--bg-input);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
  margin-top: 6px;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 20px;
  background: linear-gradient(90deg, var(--accent), #ff8c5a);
  transition: width 0.4s ease;
}

/* ===== QUESTION BUILDER ===== */
.question-builder-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}

.question-builder-item .qb-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.question-builder-item .qb-header span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent);
}

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.tab-btn {
  padding: 12px 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; padding: 20px; }
  .form-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.3s ease; }

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}
.empty-state svg { margin-bottom: 16px; opacity: 0.3; }
.empty-state h3 { font-size: 16px; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state p { font-size: 14px; }

/* Score display */
.score-display { text-align: center; padding: 40px; }
.score-display .score-number {
  font-size: 72px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}
.score-display .score-number.pass { color: var(--success); }
.score-display .score-number.fail { color: var(--danger); }
.score-display .score-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}