/* ================================================================
   CyberShield Training — Dark SaaS Theme
   Palette: Deep Navy + Cyan Accent + Clean Typography
   ================================================================ */

:root {
  --bg:         #060c18;
  --surface:    #0c1424;
  --surface2:   #111e33;
  --surface3:   #1a2942;
  --border:     #1e3050;
  --border2:    #2a4060;

  --cyan:       #00d4ff;
  --cyan-dim:   #00a8cc;
  --cyan-glow:  rgba(0, 212, 255, 0.15);
  --cyan-soft:  rgba(0, 212, 255, 0.08);

  --green:      #00c896;
  --green-soft: rgba(0, 200, 150, 0.12);
  --yellow:     #f5a623;
  --yellow-soft:rgba(245, 166, 35, 0.12);
  --red:        #ff4757;
  --red-soft:   rgba(255, 71, 87, 0.12);
  --blue:       #4a9eff;
  --blue-soft:  rgba(74, 158, 255, 0.12);

  --text:       #dce8f5;
  --text-dim:   #7a94b0;
  --text-muted: #4a6280;

  --font-head:  'Chakra Petch', sans-serif;
  --font-body:  'Outfit', sans-serif;
  --font-mono:  'JetBrains Mono', monospace;

  --radius:     10px;
  --radius-sm:  6px;
  --radius-lg:  16px;
  --sidebar-w:  240px;
}

/* ─── RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; cursor: pointer; }
button { cursor: pointer; font-family: inherit; }
input { font-family: inherit; }

/* ─── VIEWS ───────────────────────────────────────────────── */
.view { display: none; }
.view.active { display: flex; }
.hidden { display: none !important; }

/* ─── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan-dim); }

/* ================================================================
   LOGIN
================================================================ */
#view-login {
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.login-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(0,212,255,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 70%, rgba(74,158,255,0.04) 0%, transparent 50%);
}

.login-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.login-container {
  position: relative; z-index: 1;
  width: 100%; max-width: 440px;
  padding: 24px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.05);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}

.logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(0,212,255,0.05));
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan);
  flex-shrink: 0;
}
.logo-icon svg { width: 24px; height: 24px; }
.logo-icon.sm { width: 32px; height: 32px; border-radius: 8px; }
.logo-icon.sm svg { width: 16px; height: 16px; }

.logo-title {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
  line-height: 1;
}
.logo-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

.login-desc {
  color: var(--text-dim);
  font-size: 0.875rem;
  margin-bottom: 28px;
  line-height: 1.5;
}

.login-error {
  background: var(--red-soft);
  border: 1px solid rgba(255,71,87,0.3);
  color: var(--red);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.form-group input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus {
  border-color: var(--cyan-dim);
  box-shadow: 0 0 0 3px var(--cyan-soft);
}
.form-group input::placeholder { color: var(--text-muted); }

.login-hints {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.hint-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-family: var(--font-mono);
}
.hint-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.8rem;
}
.hint-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  flex-shrink: 0;
}
.hint-badge.admin { background: rgba(74,158,255,0.15); color: var(--blue); border: 1px solid rgba(74,158,255,0.3); }
.hint-badge.student { background: rgba(0,200,150,0.12); color: var(--green); border: 1px solid rgba(0,200,150,0.3); }
.mono { font-family: var(--font-mono); color: var(--text-dim); font-size: 0.78rem; }

/* ================================================================
   APP SHELL
================================================================ */
#view-app {
  min-height: 100vh;
  display: flex !important;
}

/* ─── SIDEBAR ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.03em;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s;
  cursor: pointer;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item:hover {
  background: var(--surface2);
  color: var(--text);
}
.nav-item.active {
  background: var(--cyan-soft);
  color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.15);
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-chip { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }
.user-avatar {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--cyan-dim), #006880);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.user-info { display: flex; flex-direction: column; min-width: 0; }
.user-name { font-size: 0.82rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 0.7rem; color: var(--text-muted); font-family: var(--font-mono); }

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
  color: var(--text-muted);
  display: flex;
  transition: all 0.15s;
  flex-shrink: 0;
}
.btn-logout svg { width: 16px; height: 16px; }
.btn-logout:hover { color: var(--red); border-color: var(--red); background: var(--red-soft); }

/* ─── MAIN CONTENT ────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 32px;
  max-width: 1200px;
  min-height: 100vh;
}

.section { display: none; }
.section.active { display: block; }

/* ─── PAGE HEADER ─────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}
.page-title {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}
.page-subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ─── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--cyan);
  color: var(--bg);
  font-weight: 600;
}
.btn-primary:hover { background: #00f0ff; box-shadow: 0 4px 20px rgba(0,212,255,0.3); }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text-dim);
}
.btn-outline:hover { border-color: var(--cyan-dim); color: var(--cyan); }

.btn-ghost {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface3); }

.btn-full { width: 100%; justify-content: center; }

.btn-sm { padding: 7px 14px; font-size: 0.82rem; }

/* ─── STATS GRID ──────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent, var(--cyan));
  opacity: 0.6;
}
.stat-card:hover { border-color: var(--border2); }

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}
.stat-value {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
}
.stat-icon {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft, var(--cyan-soft));
  color: var(--accent, var(--cyan));
}
.stat-icon svg { width: 18px; height: 18px; }

/* ─── COURSES GRID ────────────────────────────────────────── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.course-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 0 1px rgba(0,212,255,0.08);
}

.course-banner {
  height: 80px;
  background: linear-gradient(135deg, #0c2040 0%, #0a1a30 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.course-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}
.course-banner-icon {
  width: 40px; height: 40px;
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--cyan);
  z-index: 1;
}
.course-banner-icon svg { width: 22px; height: 22px; }

.course-body { padding: 20px; flex: 1; display: flex; flex-direction: column; gap: 10px; }

.course-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid;
  font-weight: 500;
}
.tag-level { background: var(--blue-soft); color: var(--blue); border-color: rgba(74,158,255,0.2); }
.tag-category { background: var(--cyan-soft); color: var(--cyan-dim); border-color: rgba(0,212,255,0.2); }
.tag-duration { background: var(--surface2); color: var(--text-dim); border-color: var(--border); }

.course-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.course-desc {
  font-size: 0.835rem;
  color: var(--text-dim);
  line-height: 1.55;
  flex: 1;
}

.course-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 20px;
  font-family: var(--font-mono);
}
.status-pill::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.status-not_started { background: var(--surface2); color: var(--text-muted); }
.status-in_progress { background: var(--yellow-soft); color: var(--yellow); }
.status-completed   { background: var(--green-soft);  color: var(--green);  }

.score-display {
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
}

/* ─── SECTION TITLE ROW ───────────────────────────────────── */
.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-title-row h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.link-action {
  font-size: 0.82rem;
  color: var(--cyan-dim);
  cursor: pointer;
  transition: color 0.15s;
}
.link-action:hover { color: var(--cyan); }

/* ─── BACK BUTTON ─────────────────────────────────────────── */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  cursor: pointer;
  padding: 6px 0;
  margin-bottom: 24px;
  transition: color 0.15s;
}
.back-btn svg { width: 16px; height: 16px; }
.back-btn:hover { color: var(--cyan); }

/* ================================================================
   COURSE DETAIL
================================================================ */
.course-detail-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
  margin-bottom: 32px;
}
.course-detail-title {
  font-family: var(--font-head);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 10px;
}
.course-detail-desc { color: var(--text-dim); line-height: 1.6; margin-bottom: 16px; }
.course-detail-meta { display: flex; gap: 10px; flex-wrap: wrap; }

.course-detail-actions { display: flex; flex-direction: column; gap: 10px; min-width: 180px; }

.content-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; }
  .course-detail-header { grid-template-columns: 1fr; }
}

/* Video Container */
.video-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}
.video-label {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}
.video-label svg { width: 14px; height: 14px; color: var(--cyan); }
.video-placeholder {
  aspect-ratio: 16/9;
  background: var(--surface2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.875rem;
}
.video-placeholder svg { width: 40px; height: 40px; color: var(--border2); }
.video-placeholder iframe {
  width: 100%; height: 100%;
  border: none;
}
.video-frame {
  aspect-ratio: 16/9;
  width: 100%;
}
.video-frame iframe { width: 100%; height: 100%; border: none; display: block; }

/* Course content / Markdown */
.course-content-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.course-content-box h2 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 12px;
  margin-top: 24px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.course-content-box h2:first-child { margin-top: 0; }
.course-content-box h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 18px;
  margin-bottom: 8px;
}
.course-content-box p {
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 12px;
  font-size: 0.9rem;
}
.course-content-box ul, .course-content-box ol {
  padding-left: 20px;
  margin-bottom: 14px;
}
.course-content-box li {
  color: var(--text-dim);
  line-height: 1.7;
  font-size: 0.9rem;
  margin-bottom: 4px;
}
.course-content-box strong { color: var(--text); font-weight: 600; }
.course-content-box code {
  font-family: var(--font-mono);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.82em;
  color: var(--cyan-dim);
}
.course-content-box blockquote {
  border-left: 3px solid var(--cyan-dim);
  padding: 12px 16px;
  background: var(--cyan-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 16px 0;
}
.course-content-box blockquote p {
  margin: 0;
  color: var(--text);
  font-style: italic;
}
.course-content-box hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}
.course-content-box table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.85rem;
}
.course-content-box th {
  background: var(--surface2);
  padding: 8px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  border: 1px solid var(--border);
}
.course-content-box td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.course-content-box tr:hover td { background: var(--surface2); }

/* Sidebar info panel */
.info-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.info-card h4 {
  font-family: var(--font-head);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.info-row:last-child { border-bottom: none; }
.info-row-label { color: var(--text-dim); }
.info-row-value { color: var(--text); font-weight: 500; }

/* ================================================================
   QUIZ
================================================================ */
.quiz-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.quiz-title {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}
.quiz-progress-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.progress-bar-track {
  height: 4px;
  background: var(--surface3);
  border-radius: 2px;
  margin-bottom: 24px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-dim), var(--cyan));
  border-radius: 2px;
  transition: width 0.4s ease;
}

.question-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 20px;
}
.question-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.question-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 24px;
}

.answers-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.answer-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 18px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
}
.answer-option:hover {
  border-color: var(--cyan-dim);
  background: var(--cyan-soft);
}
.answer-option.selected {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  box-shadow: 0 0 0 1px rgba(0,212,255,0.2);
}
.answer-letter {
  width: 26px; height: 26px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  flex-shrink: 0;
}
.answer-option.selected .answer-letter {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--bg);
}
.answer-text {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.5;
  padding-top: 2px;
}
.answer-option.selected .answer-text { color: var(--text); }

.quiz-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

/* ================================================================
   RESULTS
================================================================ */
.results-header {
  text-align: center;
  padding: 40px 20px;
  margin-bottom: 28px;
}
.score-ring-container {
  display: inline-block;
  position: relative;
  margin-bottom: 24px;
}
.score-ring {
  width: 140px; height: 140px;
}
.score-circle-bg { fill: none; stroke: var(--surface3); stroke-width: 8; }
.score-circle-fill {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  transform-origin: center;
  transform: rotate(-90deg);
  transition: stroke-dashoffset 1s ease;
}
.score-text-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}
.score-pct {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  display: block;
}
.score-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.results-title {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.results-subtitle { color: var(--text-dim); font-size: 0.9rem; }

.results-detail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
}

.result-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.result-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.result-icon svg { width: 14px; height: 14px; }
.result-correct .result-icon { background: var(--green-soft); color: var(--green); }
.result-wrong .result-icon { background: var(--red-soft); color: var(--red); }
.result-correct { border-color: rgba(0,200,150,0.2); }
.result-wrong { border-color: rgba(255,71,87,0.2); }

.result-q { font-size: 0.875rem; font-weight: 600; color: var(--text); margin-bottom: 6px; line-height: 1.4; }
.result-answer-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.result-answer-label { font-size: 0.72rem; font-family: var(--font-mono); color: var(--text-muted); }
.result-answer-text { font-size: 0.82rem; }
.result-answer-text.wrong-ans { color: var(--red); text-decoration: line-through; }
.result-answer-text.right-ans { color: var(--green); }

.results-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

/* ================================================================
   PROFILE
================================================================ */
.profile-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 800px) { .profile-grid { grid-template-columns: 1fr; } }

.profile-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}
.profile-avatar-lg {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, var(--cyan-dim), #006880);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 16px;
}
.profile-name {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.profile-email { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 4px; }
.profile-dept { font-size: 0.8rem; color: var(--cyan-dim); font-family: var(--font-mono); margin-bottom: 20px; }

.profile-stats {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.profile-stat-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.profile-stat-row:last-child { border-bottom: none; }
.profile-stat-label { color: var(--text-dim); }
.profile-stat-value { color: var(--text); font-weight: 600; }

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

.attempt-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.attempt-card-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}
.attempt-card-header:hover { background: var(--surface2); }
.attempt-course-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}
.attempt-meta { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.attempt-date { font-size: 0.78rem; color: var(--text-muted); font-family: var(--font-mono); }

.attempt-body {
  border-top: 1px solid var(--border);
  padding: 16px 20px;
  display: none;
}
.attempt-body.open { display: block; }

.mini-result {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}
.mini-result:last-child { border-bottom: none; }
.mini-icon {
  width: 20px; height: 20px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.mini-icon svg { width: 10px; height: 10px; }
.mini-correct .mini-icon { background: var(--green-soft); color: var(--green); }
.mini-wrong .mini-icon { background: var(--red-soft); color: var(--red); }
.mini-q { color: var(--text-dim); flex: 1; }
.mini-a { color: var(--text); font-weight: 500; }
.mini-ca { color: var(--green); font-size: 0.78rem; }

/* ================================================================
   ADMIN
================================================================ */
.admin-table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.admin-table-header {
  padding: 16px 20px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

table.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  padding: 10px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 16px;
  font-size: 0.875rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr {
  transition: background 0.1s;
  cursor: pointer;
}
.data-table tbody tr:hover td { background: var(--surface2); }

.score-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 3px 10px;
  border-radius: 20px;
}
.score-high   { background: var(--green-soft); color: var(--green); }
.score-mid    { background: var(--yellow-soft); color: var(--yellow); }
.score-low    { background: var(--red-soft);   color: var(--red); }
.score-none   { background: var(--surface3); color: var(--text-muted); }

/* ── Admin user detail ── */
.admin-user-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.admin-user-title {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}
.admin-user-sub { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ================================================================
   EMPTY STATE
================================================================ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.3; }
.empty-state p { font-size: 0.9rem; }

/* ================================================================
   LOADING
================================================================ */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--text-muted);
  gap: 12px;
}
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--border2);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  .sidebar { display: none; }
  .main-content { margin-left: 0; padding: 16px; }
}