/* =====================================================
   Triden AI Training LMS — Main Stylesheet
   Dark professional theme matching Triden brand
   ===================================================== */

:root {
  --bg:             #060e1e;
  --surface:        #0c1a30;
  --surface-2:      #112340;
  --surface-3:      #163050;
  --primary:        #1a56db;
  --primary-hover:  #1648c0;
  --primary-light:  #3b82f6;
  --success:        #059669;
  --success-bg:     #064e3b;
  --success-text:   #6ee7b7;
  --warning:        #d97706;
  --danger:         #dc2626;
  --danger-bg:      #450a0a;
  --text:           #e2e8f0;
  --text-muted:     #94a3b8;
  --text-subtle:    #64748b;
  --border:         #1e3560;
  --border-light:   #243f6a;
  --shadow:         0 4px 32px rgba(0,0,0,0.5);
  --shadow-sm:      0 2px 8px rgba(0,0,0,0.3);
  --radius:         12px;
  --radius-sm:      8px;
  --topnav-h:       60px;
  --sidebar-w:      280px;
  --font:           'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-weight: 600; line-height: 1.3; color: var(--text); }

/* ── Top Navigation ── */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topnav-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

.topnav-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.topnav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
}

.topnav-logo img { display: block; }
.logo-text { font-size: 1.1rem; font-weight: 700; color: var(--text); }

.topnav-product {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-light);
  background: rgba(59,130,246,0.12);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(59,130,246,0.25);
  letter-spacing: 0.02em;
}

.topnav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topnav-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.topnav-link:hover { color: var(--text); text-decoration: none; }
.topnav-logout { color: var(--text-subtle); }

.topnav-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  flex-shrink: 0;
}

/* ── Main Content Area ── */
.site-main {
  margin-top: var(--topnav-h);
  min-height: calc(100vh - var(--topnav-h));
}

/* ── Footer ── */
.site-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
  color: var(--text-subtle);
  font-size: 0.8rem;
}

/* =====================================================
   LOGIN PAGE
   ===================================================== */
body.page-login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  padding: 2rem;
}

body.page-login .site-main { display: none; }

.login-container {
  width: 100%;
  max-width: 440px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.login-logo { margin-bottom: 1.5rem; }
.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.login-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  line-height: 1.5;
}

.login-error {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: #fca5a5;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
}

.login-notice {
  background: var(--surface-2);
  border: 1px solid var(--border-light);
  padding: 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  text-align: left;
}
.login-notice a { color: var(--primary-light); }

.btn-ms-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: #fff;
  color: #333;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  width: 100%;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow-sm);
}
.btn-ms-login:hover {
  background: #f0f0f0;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.login-footer-note {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

/* Login form (dev-login) */
.login-form { text-align: left; }

.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}
.form-group input[type="text"],
.form-group input[type="password"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.875rem;
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font);
  transition: border-color 0.15s;
  outline: none;
}
.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,0.2);
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.925rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--primary-hover);
  text-decoration: none;
  color: #fff;
}
.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.925rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--danger);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-danger:hover { background: #b91c1c; }

.btn-complete {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--success);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
  max-width: 400px;
}
.btn-complete:hover { background: #047857; }
.btn-complete:disabled {
  background: var(--surface-3);
  color: var(--text-subtle);
  cursor: not-allowed;
}
.btn-uncomplete {
  background: var(--surface-3);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.6rem 1.25rem;
  max-width: 280px;
}
.btn-uncomplete:hover { background: var(--danger-bg); color: #fca5a5; }

/* =====================================================
   PROGRESS BAR
   ===================================================== */
.progress-bar-outer {
  background: var(--surface-3);
  border-radius: 20px;
  height: 8px;
  overflow: hidden;
}
.progress-bar-inner {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  height: 100%;
  border-radius: 20px;
  transition: width 0.4s ease;
}

/* =====================================================
   DASHBOARD PAGE
   ===================================================== */
.page-dashboard .site-main { padding: 2rem; }

.dashboard-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 0;
}

.dashboard-header { margin-bottom: 2.5rem; }
.dashboard-greeting {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.dashboard-sub { color: var(--text-muted); font-size: 0.95rem; }

.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.track-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.track-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}
.track-card.enrolled { border-color: var(--primary); }

.track-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.track-icon { font-size: 2rem; flex-shrink: 0; }

.track-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.track-desc { font-size: 0.85rem; color: var(--text-muted); }

.track-progress-area { margin-bottom: 1.25rem; }
.progress-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.progress-pct { font-weight: 600; color: var(--primary-light); }

.track-card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.track-complete-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--success-bg);
  color: var(--success-text);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--success);
}

.dashboard-tip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}
.tip-icon { font-size: 1.1rem; flex-shrink: 0; }
.tip-text strong { color: var(--text); }

/* =====================================================
   TRACK OVERVIEW PAGE
   ===================================================== */
.page-track .site-main { padding: 2rem; }

.track-page-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.breadcrumb {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: inline-block;
}
.breadcrumb:hover { color: var(--text); text-decoration: none; }

.track-page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.track-page-title-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.track-page-title-row h1 { font-size: 1.75rem; }
.track-page-pct {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-light);
  background: rgba(59,130,246,0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(59,130,246,0.2);
}

.week-section { margin-bottom: 2.5rem; }

.week-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.week-badge {
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  white-space: nowrap;
}

.week-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.day-list { display: flex; flex-direction: column; gap: 0.5rem; }

.day-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  transition: border-color 0.15s, background 0.15s;
}
.day-item.day-completed { border-color: var(--success); }
.day-item.day-available:hover { border-color: var(--border-light); background: var(--surface-2); }
.day-item.day-locked { opacity: 0.5; }

.day-item-status {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 600;
}
.day-completed .day-item-status {
  background: var(--success-bg);
  color: var(--success-text);
}
.day-available .day-item-status {
  background: var(--surface-3);
  color: var(--text-muted);
}
.day-check { font-size: 1rem; }
.day-lock { font-size: 0.875rem; }

.day-item-info { flex: 1; }
.day-item-title {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text);
}
.day-locked .day-item-title { color: var(--text-muted); }
.day-item-date { font-size: 0.78rem; color: var(--text-subtle); margin-top: 0.15rem; }

.day-item-link {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--primary-light);
  white-space: nowrap;
  text-decoration: none;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(59,130,246,0.25);
  background: rgba(59,130,246,0.07);
  transition: all 0.15s;
}
.day-item-link:hover {
  background: rgba(59,130,246,0.15);
  text-decoration: none;
}

/* =====================================================
   LESSON PAGE
   ===================================================== */
body.page-lesson .site-main {
  display: flex;
  flex-direction: column;
  padding: 0;
}

.lesson-layout {
  display: flex;
  min-height: calc(100vh - var(--topnav-h));
}

/* Sidebar */
.lesson-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  position: fixed;
  top: var(--topnav-h);
  left: 0;
  bottom: 0;
  padding: 1.25rem 0 1.5rem;
  transition: transform 0.25s;
  z-index: 50;
}

.sidebar-track-name {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-subtle);
  padding: 0 1.25rem;
  margin-bottom: 0.75rem;
}

.sidebar-progress {
  padding: 0 1.25rem;
  margin-bottom: 1.25rem;
}
.sidebar-progress-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.sidebar-day-list { padding: 0; }

.sidebar-week { margin-bottom: 0.5rem; }

.sidebar-week-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-subtle);
  padding: 0.6rem 1.25rem 0.3rem;
}

.sidebar-day-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 1.25rem;
  cursor: default;
  transition: background 0.1s;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.825rem;
  border-left: 3px solid transparent;
}

a.sidebar-day-item:hover {
  background: var(--surface-2);
  text-decoration: none;
}

.sidebar-day-completed {
  color: var(--success-text);
  border-left-color: transparent;
}
.sidebar-day-current {
  color: var(--text);
  background: rgba(26,86,219,0.12);
  border-left-color: var(--primary);
}
.sidebar-day-available { color: var(--text-muted); }
.sidebar-day-locked { color: var(--text-subtle); opacity: 0.6; }

.sidebar-day-indicator {
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}
.sidebar-day-current .sidebar-day-indicator .dot {
  width: 8px; height: 8px;
  background: var(--primary);
  border-radius: 50%;
  display: inline-block;
}

.sidebar-day-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

/* Main lesson area */
.lesson-main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  padding: 2rem 2.5rem 4rem;
  max-width: 860px;
}

.lesson-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.825rem;
  color: var(--text-subtle);
  margin-bottom: 1.5rem;
}
.lesson-breadcrumb a { color: var(--text-muted); }
.lesson-breadcrumb a:hover { color: var(--text); text-decoration: none; }
.lesson-breadcrumb span:not(:last-child) { color: var(--text-subtle); }

.lesson-header { margin-bottom: 1.5rem; }

.lesson-week-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.lesson-title {
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.lesson-complete-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--success-bg);
  color: var(--success-text);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.875rem;
  border-radius: 20px;
  border: 1px solid var(--success);
}

/* Lesson markdown content */
.lesson-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
}

.lesson-content h1,
.lesson-content h2,
.lesson-content h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.lesson-content h1:first-child,
.lesson-content h2:first-child,
.lesson-content h3:first-child { margin-top: 0; }

.lesson-content p { margin-bottom: 0.875rem; }
.lesson-content ul, .lesson-content ol {
  margin: 0.75rem 0 0.875rem 1.5rem;
}
.lesson-content li { margin-bottom: 0.35rem; }

.lesson-content code {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: 'Consolas', 'Monaco', monospace;
  color: #93c5fd;
}

.lesson-content pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
}
.lesson-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
}

.lesson-content blockquote {
  border-left: 3px solid var(--primary);
  background: var(--surface-2);
  padding: 0.875rem 1.25rem;
  margin: 1.25rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
}
.lesson-content blockquote p:last-child { margin-bottom: 0; }
.lesson-content blockquote strong { color: var(--text); }

.lesson-content strong { color: var(--text); font-weight: 600; }
.lesson-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

/* ── Quiz Section ── */
.quiz-section {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
}

.quiz-header { margin-bottom: 1.25rem; }
.quiz-badge {
  display: inline-block;
  background: rgba(26,86,219,0.15);
  color: var(--primary-light);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(26,86,219,0.3);
  margin-bottom: 0.5rem;
}
.quiz-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.quiz-question {
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}
.quiz-option:hover { border-color: var(--border-light); background: var(--surface-3); }
.quiz-option input { cursor: pointer; accent-color: var(--primary); width: 16px; height: 16px; flex-shrink: 0; }
.quiz-option-label { font-size: 0.9rem; }

.quiz-option.quiz-opt-correct {
  border-color: var(--success);
  background: var(--success-bg);
}
.quiz-option.quiz-opt-wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
  opacity: 0.8;
}
.quiz-option.quiz-opt-missed {
  border-color: var(--warning);
  background: rgba(217,119,6,0.1);
}

.quiz-actions { margin-bottom: 0.75rem; }

.quiz-feedback {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  line-height: 1.6;
}
.quiz-feedback.feedback-correct {
  background: var(--success-bg);
  border: 1px solid var(--success);
  color: var(--success-text);
}
.quiz-feedback.feedback-incorrect {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: #fca5a5;
}

.quiz-answered {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
}
.quiz-correct { background: var(--success-bg); border: 1px solid var(--success); }
.quiz-incorrect { background: var(--danger-bg); border: 1px solid var(--danger); }

.quiz-result-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}
.quiz-correct .quiz-result-icon { background: var(--success); color: #fff; }
.quiz-incorrect .quiz-result-icon { background: var(--danger); color: #fff; }

.quiz-explanation { font-size: 0.875rem; color: var(--text-muted); margin-top: 0.25rem; }
.quiz-explanation strong { color: var(--text); }

/* ── Lesson Footer ── */
.lesson-footer {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
}

.complete-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.complete-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}
.lesson-done-note {
  font-size: 0.9rem;
  color: var(--success-text);
  background: var(--success-bg);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--success);
}

.lesson-nav {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Sidebar toggle (mobile) */
.sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--primary);
  color: #fff;
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 60;
  box-shadow: var(--shadow);
}

/* =====================================================
   ADMIN PAGE
   ===================================================== */
.page-admin .site-main { padding: 2rem; }

.admin-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 0;
}

.admin-header { margin-bottom: 2rem; }
.admin-header h1 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.admin-sub { color: var(--text-muted); font-size: 0.925rem; }

.admin-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.admin-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  text-align: center;
}
.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 0.35rem;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

.admin-table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.admin-table th {
  background: var(--surface-2);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.875rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.admin-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--surface-2); }

.user-cell { display: flex; align-items: center; gap: 0.75rem; }
.user-avatar-sm {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.user-name { font-weight: 500; }
.user-email { color: var(--text-muted); font-size: 0.8rem; }

.badge-admin, .badge-test {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  margin-top: 0.2rem;
}
.badge-admin { background: rgba(26,86,219,0.15); color: var(--primary-light); border: 1px solid rgba(26,86,219,0.3); }
.badge-test  { background: var(--surface-3); color: var(--text-muted); border: 1px solid var(--border-light); }

.track-progress-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.track-pct-label { font-size: 0.8rem; color: var(--text-muted); min-width: 45px; }

.text-muted { color: var(--text-muted); }

.btn-reset-sm {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-reset-sm:hover { background: var(--danger-bg); }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
}
.modal-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.modal-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; }

/* =====================================================
   404 PAGE
   ===================================================== */
.page-404 .site-main {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
}
.not-found-wrap h1 { font-size: 4rem; color: var(--text-subtle); }
.not-found-wrap p { color: var(--text-muted); margin: 1rem 0 2rem; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 900px) {
  .lesson-sidebar {
    transform: translateX(-100%);
  }
  .lesson-sidebar.open {
    transform: translateX(0);
  }
  .lesson-main {
    margin-left: 0;
    padding: 1.25rem 1.25rem 3rem;
  }
  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .lesson-title { font-size: 1.4rem; }
}

@media (max-width: 640px) {
  .track-grid { grid-template-columns: 1fr; }
  .track-card-actions { flex-direction: column; }
  .btn-primary, .btn-ghost { width: 100%; }
  .admin-stats-row { grid-template-columns: repeat(2, 1fr); }
  .admin-table-wrap { overflow-x: auto; }
  .topnav-inner { padding: 0 1rem; }
  .dashboard-wrap { padding: 1rem 0; }
  .page-dashboard .site-main { padding: 1rem; }
}

/* ── Inline complete warning ── */
.complete-warning {
  margin-top: 0.75rem;
  padding: 0.875rem 1rem 0.875rem 1.25rem;
  background: rgba(217,119,6,0.12);
  border: 1px solid var(--warning);
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-sm);
  color: #fbbf24;
  font-size: 0.875rem;
  line-height: 1.5;
  max-width: 520px;
}