/* ── AulaAI Design System ─────────────────────────────── */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-card-hover: #1f2847;
  --bg-input: #0f1629;
  --border: #2a3455;
  --border-light: #3a4565;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99,102,241,0.25);
  --success: #22c55e;
  --success-bg: rgba(34,197,94,0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245,158,11,0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239,68,68,0.12);
  --info: #3b82f6;
  --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-2: linear-gradient(135deg, #3b82f6, #6366f1);
  --gradient-3: linear-gradient(135deg, #f59e0b, #ef4444);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Screens ─────────────────────────────────────────── */
.screen { display: none; min-height: 100vh; }
.screen.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ── Login ───────────────────────────────────────────── */
.login-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}
.login-hero {
  background: var(--gradient-1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.hero-pattern {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.08) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%);
}
.hero-content { text-align: center; z-index: 1; }
.logo-mark { font-size: 64px; margin-bottom: 16px; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3)); }
.hero-content h1 { font-size: 48px; font-weight: 800; letter-spacing: -1px; color: #fff; }
.hero-subtitle { font-size: 18px; color: rgba(255,255,255,0.8); margin-top: 8px; }
.hero-book {
  margin-top: 24px;
  padding: 8px 20px;
  background: rgba(255,255,255,0.15);
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  display: inline-block;
  backdrop-filter: blur(8px);
}
.login-form-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px 64px;
  background: var(--bg-secondary);
}
.login-form-section h2 { font-size: 28px; font-weight: 700; margin-bottom: 4px; }
.login-hint { color: var(--text-secondary); margin-bottom: 32px; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.form-group input, .text-input, .select-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  font-family: inherit;
  transition: var(--transition);
}
.form-group input:focus, .text-input:focus, .select-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary {
  background: var(--gradient-1);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); }
.btn-full { width: 100%; justify-content: center; padding: 14px; font-size: 15px; }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text-primary); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-outline:hover { border-color: var(--accent); background: var(--accent-glow); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }

.error-msg { color: var(--danger); font-size: 14px; margin-top: 12px; text-align: center; }
.hidden { display: none !important; }

.demo-accounts { margin-top: 32px; border-top: 1px solid var(--border); padding-top: 24px; }
.demo-title { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 12px; }
.demo-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 8px;
}
.demo-btn:hover { border-color: var(--accent); background: var(--bg-card-hover); }
.demo-icon { font-size: 20px; }

/* ── Navigation ──────────────────────────────────────── */
.topnav {
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 64px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.nav-brand { display: flex; align-items: center; gap: 10px; margin-right: 32px; }
.nav-logo { font-size: 24px; }
.nav-logo-img { height: 32px; width: auto; object-fit: contain; }
.nav-title { font-size: 18px; font-weight: 700; }
.nav-badge {
  padding: 3px 10px;
  background: var(--gradient-1);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.student-badge { background: linear-gradient(135deg, #22c55e, #16a34a); }
.nav-tabs { display: flex; gap: 4px; flex: 1; }
.nav-tab {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.nav-tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-tab.active { color: var(--accent-light); background: var(--accent-glow); }
.nav-user { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--text-secondary); }

/* ── Dashboard Content ───────────────────────────────── */
.dashboard-content { max-width: 1280px; margin: 0 auto; padding: 32px 24px; }
.tab-panel { display: none; animation: fadeIn 0.3s ease; }
.tab-panel.active { display: block; }

.page-header { margin-bottom: 28px; display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 16px; }
.page-header h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; }
.subtitle { color: var(--text-secondary); font-size: 15px; margin-top: 4px; }

/* ── Stats Grid ──────────────────────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-muted); font-weight: 600; }
.stat-value { font-size: 32px; font-weight: 800; margin-top: 8px; letter-spacing: -1px; }
.stat-sub { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }
.stat-value.accent { background: var(--gradient-1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-value.success { color: var(--success); }
.stat-value.warning { color: var(--warning); }
.stat-value.danger { color: var(--danger); }

/* ── Cards ────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}
.card-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h3 { font-size: 16px; font-weight: 600; }
.card-body { padding: 20px 24px; }

.grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ── Curriculum Tree ─────────────────────────────────── */
.chapter-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.chapter-header {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}
.chapter-header:hover { background: var(--bg-card-hover); }
.chapter-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--gradient-1);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-right: 16px;
  flex-shrink: 0;
}
.chapter-title { font-size: 16px; font-weight: 600; flex: 1; }
.chapter-toggle { color: var(--text-muted); font-size: 20px; transition: var(--transition); }
.chapter-topics { padding: 0 24px 16px; display: none; }
.chapter-topics.open { display: block; animation: fadeIn 0.2s ease; }

.topic-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  transition: var(--transition);
}
.topic-item:hover { background: rgba(255,255,255,0.03); }
.topic-info { display: flex; align-items: center; gap: 12px; }
.topic-type-badge {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.topic-type-badge.vocabulary { background: rgba(59,130,246,0.15); color: #60a5fa; }
.topic-type-badge.grammar { background: rgba(168,85,247,0.15); color: #c084fc; }
.topic-type-badge.reading { background: rgba(34,197,94,0.15); color: #4ade80; }
.topic-name { font-size: 14px; font-weight: 500; }
.topic-meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 12px; }

/* ── Activity Preview ────────────────────────────────── */
.activity-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 12px;
  transition: var(--transition);
}
.activity-card.correct { border-color: var(--success); background: var(--success-bg); }
.activity-card.incorrect { border-color: var(--danger); background: var(--danger-bg); }
.activity-type-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--accent-light);
  font-weight: 600;
  margin-bottom: 8px;
}
.activity-prompt { font-size: 18px; font-weight: 600; margin-bottom: 16px; line-height: 1.5; }

.options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.option-btn {
  padding: 12px 16px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
}
.option-btn:hover { border-color: var(--accent); background: var(--accent-glow); }
.option-btn.selected { border-color: var(--accent); background: var(--accent-glow); }
.option-btn.correct-answer { border-color: var(--success); background: var(--success-bg); }
.option-btn.wrong-answer { border-color: var(--danger); background: var(--danger-bg); }

.fill-blank-input {
  padding: 10px 16px;
  background: var(--bg-input);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 16px;
  width: 200px;
  transition: var(--transition);
}
.fill-blank-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.feedback-msg {
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}
.feedback-msg.correct { background: var(--success-bg); color: var(--success); }
.feedback-msg.incorrect { background: var(--danger-bg); color: var(--danger); }

/* ── Roster ──────────────────────────────────────────── */
.roster-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.student-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}
.student-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.student-name { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.student-mastery-bar { height: 6px; background: var(--bg-input); border-radius: 3px; overflow: hidden; margin-bottom: 8px; }
.student-mastery-fill { height: 100%; border-radius: 3px; transition: width 0.6s ease; }
.student-meta-row { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-secondary); }

/* ── Progress Bars ───────────────────────────────────── */
.progress-item { margin-bottom: 16px; }
.progress-label { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 14px; }
.progress-label span:first-child { font-weight: 500; }
.progress-label span:last-child { color: var(--text-secondary); }
.progress-bar { height: 8px; background: var(--bg-input); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 4px; transition: width 0.8s cubic-bezier(0.4,0,0.2,1); }

/* ── Report ──────────────────────────────────────────── */
.report-section { margin-bottom: 28px; }
.report-section h3 { font-size: 18px; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

.risk-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}
.risk-name { font-weight: 600; }
.risk-badges { display: flex; gap: 6px; }
.risk-badge {
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.risk-badge.critical { background: var(--danger-bg); color: var(--danger); }
.risk-badge.warning { background: var(--warning-bg); color: var(--warning); }
.risk-badge.low { background: rgba(59,130,246,0.12); color: var(--info); }

.topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.topic-practice-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}
.topic-practice-card:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ── Modal ────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}
.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 640px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}

/* ── Quiz Taking ─────────────────────────────────────── */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding: 16px 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.quiz-progress-text { font-size: 14px; color: var(--text-secondary); }
.quiz-timer { font-size: 20px; font-weight: 700; color: var(--accent-light); font-variant-numeric: tabular-nums; }

.quiz-result-card {
  text-align: center;
  padding: 48px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.quiz-score-big { font-size: 72px; font-weight: 800; margin: 16px 0; }
.quiz-score-label { font-size: 18px; color: var(--text-secondary); }

.form-row { display: flex; gap: 16px; margin-bottom: 16px; }
.form-row .form-group { flex: 1; }
.card-list .card { cursor: pointer; }
.card-list .card:hover { border-color: var(--accent); }

/* ── Responsive ──────────────────────────────────────── */

/* Tablet */
@media (max-width: 1024px) {
  .grid-2col { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile */
@media (max-width: 768px) {
  /* Login */
  .login-container { grid-template-columns: 1fr; }
  .login-hero { display: none; }
  .login-form-section { padding: 32px 20px; }

  /* Top Nav → slim static header */
  .topnav {
    position: static;
    flex-wrap: nowrap;
    justify-content: space-between;
    padding: 0 16px;
    height: 56px;
    backdrop-filter: none;
  }
  .nav-brand { margin-right: 0; gap: 8px; }
  .nav-title { display: none; }
  .nav-logo { font-size: 20px; }
  .nav-badge { font-size: 10px; padding: 2px 8px; }

  /* Hide username but keep logout visible */
  #nav-username, #student-nav-username { display: none; }
  .nav-user {
    display: flex !important;
  }
  .nav-user .btn-ghost {
    padding: 8px 14px;
    font-size: 13px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
  }

  /* Tabs → Fixed Bottom Navigation Bar */
  .nav-tabs {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: auto;
    min-height: 60px;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: rgba(10, 14, 26, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    gap: 0;
    box-shadow: 0 -2px 20px rgba(0,0,0,0.5);
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .nav-tabs::-webkit-scrollbar { display: none; }

  .nav-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    flex: 0 0 auto;
    padding: 8px 6px 6px;
    border-radius: 0;
    background: transparent;
    scroll-snap-align: center;
    -webkit-tap-highlight-color: transparent;
    position: relative;
  }
  .nav-tab:hover { background: transparent; }
  .nav-tab.active {
    background: transparent;
    color: var(--accent-light);
  }
  .nav-tab.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 3px;
    background: var(--accent);
    border-radius: 0 0 4px 4px;
  }

  .tab-icon {
    font-size: 20px;
    margin-bottom: 2px;
    display: block;
    filter: grayscale(0.8) brightness(0.6);
    transition: all 0.2s ease;
  }
  .nav-tab.active .tab-icon {
    filter: none;
    transform: scale(1.1);
  }
  .tab-label {
    font-size: 9px;
    line-height: 1.2;
    white-space: nowrap;
    letter-spacing: 0.2px;
  }

  /* Dashboard content — space for bottom nav */
  .dashboard-content {
    padding: 16px 14px;
    padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px));
  }

  /* Page headers */
  .page-header { margin-bottom: 20px; }
  .page-header h1 { font-size: 22px; }
  .subtitle { font-size: 13px; }

  /* Stats */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 20px; }
  .stat-card { padding: 14px 16px; }
  .stat-value { font-size: 26px; }
  .stat-label { font-size: 11px; }

  /* Cards */
  .card-header, .card-body { padding: 14px 16px; }

  /* Forms */
  .form-row { flex-direction: column; gap: 12px; }

  /* Grids */
  .grid-2col { grid-template-columns: 1fr; }
  .options-grid { grid-template-columns: 1fr; }
  .roster-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

  /* Practice cards */
  .topic-practice-card { padding: 14px; }

  /* Activity cards */
  .activity-card { padding: 16px; }
  .activity-prompt { font-size: 15px; }
  .fill-blank-input { width: 100%; margin-bottom: 12px; }

  /* Curriculum */
  .chapter-header { padding: 14px 16px; }

  /* Student cards */
  .student-card { padding: 14px 16px; }

  /* Modal — full screen on mobile */
  .modal-content {
    margin: 0;
    border-radius: 16px 16px 0 0;
    max-height: 90vh;
    padding: 24px 16px;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    animation: slideUp 0.3s ease;
  }
  @keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }

  /* Quiz result */
  .quiz-score-big { font-size: 56px; }

  /* Touch targets — minimum 44px per Apple/Google guidelines */
  .btn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
  .option-btn { min-height: 48px; padding: 12px 16px; font-size: 15px; }
  .dialogue-row { gap: 4px; }
  .dialogue-row .btn { min-height: 44px; min-width: 44px; font-size: 18px; }

  /* Report on mobile */
  .report-metrics-flex { flex-direction: column !important; }
}

/* Small phones (iPhone SE, etc) */
@media (max-width: 375px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 22px; }
  .topic-grid { grid-template-columns: 1fr; }
  .nav-tab { min-width: 56px; }
  .tab-label { font-size: 8px; }
  .tab-icon { font-size: 18px; }
  .page-header h1 { font-size: 20px; }
}

/* Mobile Login Optimization */
@media (max-width: 768px) {
  .login-form-section {
    padding: 24px 20px;
    min-height: 100vh;
    min-height: 100dvh;
    justify-content: flex-start;
    padding-top: 40px;
  }
  .login-form-section h2 { font-size: 24px; }
  .login-hint { font-size: 14px; margin-bottom: 24px; }
  .form-group input { padding: 14px 16px; font-size: 16px; } /* 16px prevents iOS zoom */
  .btn-full { padding: 16px; font-size: 16px; }
  .demo-btn { padding: 14px 16px; }
  .nav-logo-img { width: 28px; height: 28px; }
}

/* Landscape phone */
@media (max-height: 500px) and (orientation: landscape) {
  .login-form-section {
    padding: 16px 32px;
    min-height: 100vh;
    overflow-y: auto;
  }
  .login-form-section h2 { font-size: 20px; margin-bottom: 2px; }
  .login-hint { margin-bottom: 12px; }
  .form-group { margin-bottom: 10px; }
  .form-group input { padding: 10px 14px; }
  .btn-full { padding: 12px; }
  .demo-accounts { margin-top: 16px; padding-top: 12px; }
  .dashboard-content { padding-bottom: calc(70px + env(safe-area-inset-bottom, 0px)); }
}

/* ── Utility ─────────────────────────────────────────── */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.gap-8 { gap: 8px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }