@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a1f35;
  --bg-glass: rgba(30, 41, 72, 0.6);
  --border: rgba(99, 130, 255, 0.15);
  --border-hover: rgba(99, 130, 255, 0.35);
  --text-primary: #f0f2ff;
  --text-secondary: #8b95b8;
  --text-muted: #5a6380;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --pink: #ec4899;
  --cyan: #06b6d4;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(99,102,241,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(236,72,153,0.06) 0%, transparent 50%);
  z-index: 0;
  pointer-events: none;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  position: relative;
  z-index: 1;
}

/* ===== HEADER ===== */
.hero {
  text-align: center;
  padding: 32px 16px 24px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  color: white;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(135deg, #f0f2ff, #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.hero p {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 400px;
  margin: 0 auto;
}

/* ===== NAME INPUT ===== */
.name-section {
  margin-bottom: 20px;
}
.input-group {
  position: relative;
}
.input-group input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 15px;
  transition: var(--transition);
  outline: none;
}
.input-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.input-group input::placeholder { color: var(--text-muted); }

/* ===== TABS ===== */
.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 4px;
}
.tab {
  flex: 1;
  padding: 10px 8px;
  text-align: center;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: none;
  user-select: none;
}
.tab:hover { color: var(--text-primary); }
.tab.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* ===== EXAM PANEL ===== */
.exam-panel { display: none; }
.exam-panel.active { display: block; animation: fadeIn 0.25s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 20px 0 10px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.section-label .calc-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.calc-badge.no-calc { background: rgba(239,68,68,0.15); color: #f87171; }
.calc-badge.calc { background: rgba(16,185,129,0.15); color: #34d399; }

/* ===== PROBLEM GRID ===== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}
.problem-grid.frq { grid-template-columns: repeat(3, 1fr); }

.prob-btn {
  position: relative;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.prob-btn:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}
.prob-btn.selected {
  background: linear-gradient(135deg, var(--accent), #818cf8);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 2px 12px var(--accent-glow);
  transform: scale(1.05);
}
.prob-btn.frq-btn {
  aspect-ratio: auto;
  padding: 14px 8px;
  flex-direction: column;
  gap: 4px;
  font-size: 15px;
}

/* ===== EXPANDED HELP PANEL ===== */
.help-panel {
  display: none;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin: 8px 0 16px;
  animation: slideDown 0.25s ease;
}
.help-panel.visible { display: block; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.help-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.help-header .q-num {
  font-weight: 700;
  font-size: 15px;
}
.topic-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(99,102,241,0.15);
  color: #a5b4fc;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
}
.answer-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(16,185,129,0.15);
  color: #34d399;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
}
.help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.help-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid transparent;
}
.help-link:hover { transform: translateY(-1px); }
.help-link.ai {
  background: rgba(236,72,153,0.12);
  color: #f472b6;
  border-color: rgba(236,72,153,0.2);
}
.help-link.ai:hover { background: rgba(236,72,153,0.2); }
.help-link.video {
  background: rgba(239,68,68,0.12);
  color: #f87171;
  border-color: rgba(239,68,68,0.2);
}
.help-link.video:hover { background: rgba(239,68,68,0.2); }
.help-link.khan {
  background: rgba(6,182,212,0.12);
  color: #22d3ee;
  border-color: rgba(6,182,212,0.2);
}
.help-link.khan:hover { background: rgba(6,182,212,0.2); }

/* ===== CONFIDENCE ===== */
.confidence-section {
  margin: 24px 0 16px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.confidence-section label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 10px;
}
.confidence-row {
  display: flex;
  gap: 8px;
}
.conf-btn {
  flex: 1;
  padding: 10px 4px;
  text-align: center;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.conf-btn:hover { border-color: var(--border-hover); color: var(--text-secondary); }
.conf-btn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ===== WORRY TEXT ===== */
.worry-section {
  margin: 16px 0;
}
.worry-section label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.worry-section textarea {
  width: 100%;
  min-height: 80px;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
  outline: none;
  transition: var(--transition);
}
.worry-section textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ===== SUBMIT ===== */
.submit-section { margin: 24px 0 40px; }
.submit-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: white;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
}
.submit-btn:active { transform: translateY(0); }
.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}
.submit-btn.success {
  background: linear-gradient(135deg, var(--success), #34d399);
}

.counter {
  text-align: center;
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.counter strong { color: var(--accent); }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: transform 0.3s ease;
  backdrop-filter: blur(12px);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== STATS BAR ===== */
.stats-bar {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}
.stat-card {
  flex: 1;
  padding: 12px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
}
.stat-card .stat-val {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-card .stat-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

/* ===== DASHBOARD STYLES ===== */
.dash-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}
.dash-card h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.heat-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.heat-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-secondary);
  position: relative;
}
.heat-cell.h1 { background: rgba(99,102,241,0.15); color: #a5b4fc; }
.heat-cell.h2 { background: rgba(99,102,241,0.25); color: #a5b4fc; }
.heat-cell.h3 { background: rgba(99,102,241,0.4); color: white; }
.heat-cell.h4 { background: rgba(99,102,241,0.6); color: white; }
.heat-cell.h5 { background: rgba(239,68,68,0.5); color: white; }

.trouble-list { list-style: none; }
.trouble-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.trouble-item:last-child { border-bottom: none; }
.trouble-rank {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-muted);
  min-width: 28px;
}
.trouble-bar-bg {
  flex: 1;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}
.trouble-bar {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), var(--pink));
  transition: width 0.5s ease;
}
.trouble-count {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 20px;
  text-align: right;
}
.topic-bar-container { margin-bottom: 10px; }
.topic-bar-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
  font-size: 13px;
}
.topic-bar-label span:first-child { color: var(--text-secondary); font-weight: 600; }
.topic-bar-label span:last-child { color: var(--text-muted); }

.response-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 8px;
}
.response-card .resp-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.response-card .resp-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-muted);
}
.empty-state .emoji { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

/* ===== VIEW QUESTION & GOOGLE BUTTONS ===== */
.help-link.view-q {
  background: rgba(245,158,11,0.12);
  color: #fbbf24;
  border-color: rgba(245,158,11,0.2);
  cursor: pointer;
  font-family: inherit;
}
.help-link.view-q:hover { background: rgba(245,158,11,0.2); }
.help-link.google {
  background: rgba(59,130,246,0.12);
  color: #60a5fa;
  border-color: rgba(59,130,246,0.2);
}
.help-link.google:hover { background: rgba(59,130,246,0.2); }

/* ===== QUESTION IMAGE LIGHTBOX ===== */
#qOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
#qOverlay.show {
  opacity: 1;
  pointer-events: all;
}
.q-lightbox {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 95vw;
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  animation: lbIn 0.25s ease;
}
@keyframes lbIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.q-lb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.q-lb-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: var(--transition);
}
.q-lb-close:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
}
.q-lb-body {
  overflow: auto;
  padding: 8px;
  -webkit-overflow-scrolling: touch;
}
.q-lb-body img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: 8px;
  margin: 0 auto;
  background: white;
}

/* ===== NAV BAR ===== */
.nav-bar {
  display: flex; gap: 6px; margin-bottom: 20px; padding: 4px;
  background: var(--bg-secondary); border-radius: var(--radius);
}
.nav-link {
  flex: 1; padding: 10px 8px; text-align: center; border-radius: var(--radius-sm);
  font-size: 12px; font-weight: 600; color: var(--text-secondary);
  text-decoration: none; transition: var(--transition); white-space: nowrap;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { background: var(--accent); color: white; }

/* ===== FORMS (extended) ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.form-input {
  width: 100%; padding: 12px 14px; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-primary); font-family: inherit; font-size: 15px;
  outline: none; transition: var(--transition);
}
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-input::placeholder { color: var(--text-muted); }
.form-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; display: none; }

/* ===== CARDS (extended) ===== */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px; margin-bottom: 16px;
}
.card h2 { font-size: 16px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px; border-radius: var(--radius); font-family: inherit;
  font-size: 15px; font-weight: 700; border: none; cursor: pointer;
  transition: var(--transition); text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: white; width: 100%; box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 6px 24px var(--accent-glow); }
.btn-success { background: linear-gradient(135deg, var(--success), #34d399); color: white; }
.btn-danger { background: linear-gradient(135deg, var(--danger), #f87171); color: white; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--accent); color: var(--text-primary); }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ===== PILL SELECTORS ===== */
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  flex: 1; min-width: 80px; padding: 12px 8px; text-align: center;
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 600;
  color: var(--text-muted); background: var(--bg-secondary);
  border: 1px solid var(--border); cursor: pointer; transition: var(--transition);
}
.pill:hover { border-color: var(--border-hover); color: var(--text-secondary); }
.pill.active { background: var(--accent); border-color: var(--accent); color: white; }

/* ===== TIMER ===== */
.timer-display { font-size: 48px; font-weight: 800; font-variant-numeric: tabular-nums; z-index: 1; }
.timer-label { font-size: 13px; color: var(--text-muted); font-weight: 600; }
@keyframes pulse { 50% { opacity: 0.5; } }

/* ===== BADGES ===== */
.badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 4px 12px;
  border-radius: 12px; font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
}
.badge-calc { background: rgba(16,185,129,0.15); color: #34d399; }
.badge-nocalc { background: rgba(239,68,68,0.15); color: #f87171; }
.badge-unit { background: rgba(99,102,241,0.15); color: #a5b4fc; margin: 2px; }

/* ===== SCORE INPUT ===== */
.score-slider-wrap { margin: 16px 0; }
.score-display {
  text-align: center; font-size: 64px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 8px;
}
.score-slider { width: 100%; -webkit-appearance: none; appearance: none; height: 8px; border-radius: 4px; background: var(--bg-secondary); outline: none; }
.score-slider::-webkit-slider-thumb { -webkit-appearance: none; width: 24px; height: 24px; border-radius: 50%; background: var(--accent); cursor: pointer; box-shadow: 0 2px 8px var(--accent-glow); }
.score-label-row { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* ===== PROGRESS BARS ===== */
.progress-bar-wrap { margin-bottom: 12px; }
.progress-bar-header { display: flex; justify-content: space-between; margin-bottom: 4px; font-size: 13px; }
.progress-bar-header span:first-child { color: var(--text-secondary); font-weight: 600; }
.progress-bar-header span:last-child { color: var(--text-muted); }
.progress-bar-bg { height: 8px; background: var(--bg-secondary); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; border-radius: 4px; transition: width 0.5s ease; background: linear-gradient(90deg, var(--accent), var(--pink)); }
.progress-bar-fill.green { background: linear-gradient(90deg, var(--success), #34d399); }
.progress-bar-fill.yellow { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.progress-bar-fill.red { background: linear-gradient(90deg, var(--danger), #f87171); }

/* ===== DATA TABLE ===== */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th { text-align: left; padding: 10px 8px; font-weight: 600; color: var(--text-muted); border-bottom: 1px solid var(--border); font-size: 11px; text-transform: uppercase; letter-spacing: 0.8px; }
.data-table td { padding: 10px 8px; border-bottom: 1px solid rgba(99,130,255,0.08); color: var(--text-secondary); }
.data-table tr:hover td { color: var(--text-primary); background: rgba(99,102,241,0.04); }

/* ===== MODAL ===== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(4px); z-index: 100; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal-overlay.hidden { display: none; }
.modal { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; max-width: 480px; width: 100%; }

/* ===== TOGGLE ROW ===== */
.toggle-row { display: flex; margin-bottom: 20px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.toggle-btn { flex: 1; padding: 12px; text-align: center; cursor: pointer; font-weight: 600; font-size: 14px; background: transparent; color: var(--text-secondary); transition: var(--transition); border: none; font-family: inherit; }
.toggle-btn.active { background: var(--accent); color: white; }
.toggle-btn:hover:not(.active) { background: rgba(139,92,246,0.1); }

/* ===== RESPONSIVE ===== */
@media (max-width: 500px) {
  .problem-grid { grid-template-columns: repeat(5, 1fr); }
  .hero h1 { font-size: 22px; }
  .help-links { flex-direction: column; }
  .q-lightbox { max-width: 100vw; border-radius: var(--radius); }
  .stats-bar { flex-wrap: wrap; }
  .stat-card { min-width: calc(50% - 4px); }
  .timer-display { font-size: 36px; }
  .pill-row { flex-wrap: wrap; }
  .pill { min-width: calc(33% - 6px); }
  .nav-bar { flex-wrap: wrap; }
  .nav-link { min-width: calc(33% - 4px); font-size: 11px; }
}

/* ===== COMMAND CENTER (teacher dashboard) ===== */
.cmd-shell { display: flex; height: 100vh; overflow: hidden; background: var(--bg-primary); }

/* Sidebar */
.cmd-sidebar {
  width: 272px; min-width: 272px; display: flex; flex-direction: column;
  background: var(--bg-secondary); border-right: 1px solid var(--border); overflow: hidden;
}
.cmd-sidebar-header {
  padding: 16px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.cmd-logo {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px;
}
.cmd-logo-text {
  font-size: 13px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cmd-search {
  width: 100%; padding: 9px 12px 9px 34px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary); font-family: inherit; font-size: 13px;
  outline: none; transition: var(--transition);
}
.cmd-search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.cmd-search::placeholder { color: var(--text-muted); }
.cmd-search-wrap { position: relative; margin-bottom: 12px; }
.cmd-search-wrap::before {
  content: '🔍'; position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  font-size: 13px; pointer-events: none;
}
.cmd-grade-pills { display: flex; gap: 4px; }
.cmd-grade-pill {
  flex: 1; padding: 6px 4px; text-align: center; border-radius: 6px; font-size: 11px;
  font-weight: 700; color: var(--text-muted); background: var(--bg-card); border: 1px solid var(--border);
  cursor: pointer; transition: var(--transition); font-family: inherit;
}
.cmd-grade-pill:hover { color: var(--text-secondary); border-color: var(--border-hover); }
.cmd-grade-pill.active { background: var(--accent); border-color: var(--accent); color: white; }

/* Sidebar nav */
.cmd-nav { flex-shrink: 0; border-bottom: 1px solid var(--border); }
.cmd-nav-item {
  display: flex; align-items: center; gap: 10px; padding: 11px 16px; font-size: 13px;
  font-weight: 600; color: var(--text-secondary); cursor: pointer; transition: var(--transition);
  border-left: 3px solid transparent;
}
.cmd-nav-item:hover { background: rgba(99,102,241,0.06); color: var(--text-primary); }
.cmd-nav-item.active {
  background: rgba(99,102,241,0.1); color: var(--accent);
  border-left-color: var(--accent);
}
.cmd-nav-item .cmd-nav-icon { font-size: 15px; width: 20px; text-align: center; }

/* Student roster */
.cmd-roster-header {
  padding: 10px 16px; font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1.2px; color: var(--text-muted); border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.cmd-roster { flex: 1; overflow-y: auto; }
.cmd-student-row {
  display: flex; align-items: center; gap: 10px; padding: 10px 16px; cursor: pointer;
  transition: var(--transition); border-left: 3px solid transparent;
  border-bottom: 1px solid rgba(99,130,255,0.06);
}
.cmd-student-row:hover { background: rgba(99,102,241,0.06); }
.cmd-student-row.active {
  background: rgba(99,102,241,0.1); border-left-color: var(--accent);
}
.cmd-perf-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.cmd-perf-dot.green { background: var(--success); box-shadow: 0 0 6px rgba(16,185,129,0.4); }
.cmd-perf-dot.yellow { background: var(--warning); box-shadow: 0 0 6px rgba(245,158,11,0.4); }
.cmd-perf-dot.red { background: var(--danger); box-shadow: 0 0 6px rgba(239,68,68,0.4); }
.cmd-perf-dot.none { background: var(--text-muted); }
.cmd-student-info { flex: 1; min-width: 0; }
.cmd-student-name { font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cmd-student-stats { font-size: 11px; color: var(--text-muted); margin-top: 1px; }
.cmd-grade-tag {
  font-size: 9px; font-weight: 700; padding: 2px 6px; border-radius: 4px;
  background: rgba(99,102,241,0.15); color: #a5b4fc; flex-shrink: 0;
}

/* Main panel */
.cmd-main {
  flex: 1; overflow-y: auto; padding: 24px 32px; position: relative;
}
.cmd-main::before {
  content: ''; position: fixed; top: -50%; left: 272px; width: calc(200% - 272px); height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(99,102,241,0.06) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(236,72,153,0.04) 0%, transparent 50%);
  z-index: 0; pointer-events: none;
}
.cmd-main > * { position: relative; z-index: 1; }
.cmd-main-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px;
}
.cmd-main-title { font-size: 24px; font-weight: 800; color: var(--text-primary); }

/* Stats row */
.cmd-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px; }
.cmd-stat-card {
  padding: 16px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); text-align: center;
}
.cmd-stat-val {
  font-size: 28px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cmd-stat-label {
  font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.8px; margin-top: 4px;
}

/* Card grid */
.cmd-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.cmd-grid-full { grid-column: 1 / -1; }
.cmd-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 20px; animation: fadeIn 0.25s ease;
}
.cmd-card-title {
  font-size: 14px; font-weight: 700; color: var(--text-primary); margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}

/* Student profile header */
.cmd-profile-header {
  display: flex; align-items: center; gap: 20px; padding: 20px 24px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  margin-bottom: 20px; animation: fadeIn 0.25s ease;
}
.cmd-profile-avatar {
  width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-size: 22px; font-weight: 800; color: white; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--pink));
}
.cmd-profile-info { flex: 1; }
.cmd-profile-name { font-size: 22px; font-weight: 800; color: var(--text-primary); }
.cmd-profile-meta { font-size: 13px; color: var(--text-secondary); margin-top: 2px; display: flex; align-items: center; gap: 8px; }
.cmd-profile-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Push-to-live button */
.cmd-push-btn {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 10px;
  border-radius: 6px; font-size: 11px; font-weight: 700; cursor: pointer;
  background: rgba(99,102,241,0.12); color: #a5b4fc; border: 1px solid rgba(99,102,241,0.2);
  font-family: inherit; transition: var(--transition);
}
.cmd-push-btn:hover { background: rgba(99,102,241,0.25); transform: translateY(-1px); }
.cmd-push-btn.danger { background: rgba(239,68,68,0.12); color: #f87171; border-color: rgba(239,68,68,0.2); }
.cmd-push-btn.danger:hover { background: rgba(239,68,68,0.25); }

/* Question row in dashboard */
.cmd-q-row {
  display: flex; align-items: center; gap: 8px; padding: 8px 0;
  border-bottom: 1px solid rgba(99,130,255,0.08); font-size: 13px;
}
.cmd-q-row:last-child { border-bottom: none; }
.cmd-q-id { font-weight: 700; min-width: 70px; color: var(--text-primary); }
.cmd-q-topic { flex: 1; font-size: 11px; color: var(--text-muted); }
.cmd-q-badge {
  font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 6px;
  background: rgba(239,68,68,0.15); color: #f87171;
}
.cmd-q-push {
  width: 28px; height: 28px; border-radius: 6px; display: flex; align-items: center;
  justify-content: center; font-size: 12px; cursor: pointer; border: 1px solid var(--border);
  background: transparent; color: var(--text-muted); transition: var(--transition); flex-shrink: 0;
}
.cmd-q-push:hover { border-color: var(--accent); color: var(--accent); background: rgba(99,102,241,0.08); }

/* Missed question thumbnails */
.cmd-missed-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.cmd-missed-item {
  background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px; width: calc(50% - 4px); cursor: pointer; transition: var(--transition);
}
.cmd-missed-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.cmd-missed-label { font-size: 12px; font-weight: 700; margin-bottom: 6px; }
.cmd-missed-actions { display: flex; gap: 4px; margin-top: 6px; }

/* Performance ring */
.cmd-perf-ring {
  width: 52px; height: 52px; flex-shrink: 0; position: relative;
}
.cmd-perf-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.cmd-perf-ring-bg { fill: none; stroke: var(--bg-secondary); stroke-width: 4; }
.cmd-perf-ring-fill { fill: none; stroke-width: 4; stroke-linecap: round; transition: stroke-dashoffset 0.8s ease; }
.cmd-perf-ring-text {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800;
}

/* Live roster sidebar (compact) */
.live-roster-sidebar {
  width: 220px; min-width: 220px; display: flex; flex-direction: column;
  background: var(--bg-secondary); border-right: 1px solid var(--border);
  transition: width 0.2s ease, min-width 0.2s ease; overflow: hidden;
}
.live-roster-sidebar.collapsed { width: 0; min-width: 0; border-right: none; }
.live-roster-header {
  padding: 10px 12px; font-size: 12px; font-weight: 700; color: var(--text-muted);
  border-bottom: 1px solid var(--border); display: flex; align-items: center;
  justify-content: space-between; flex-shrink: 0;
}
.live-roster-toggle {
  width: 24px; height: 24px; border-radius: 4px; display: flex; align-items: center;
  justify-content: center; cursor: pointer; background: none; border: 1px solid var(--border);
  color: var(--text-muted); font-size: 12px; transition: var(--transition);
}
.live-roster-toggle:hover { border-color: var(--accent); color: var(--accent); }
.live-roster-list { flex: 1; overflow-y: auto; }
.live-roster-item {
  display: flex; align-items: center; gap: 8px; padding: 6px 12px; font-size: 12px;
  border-bottom: 1px solid rgba(99,130,255,0.06);
}
.live-roster-name { flex: 1; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.live-roster-pct { font-size: 10px; font-weight: 700; min-width: 30px; text-align: right; }

/* Auth overlay for dashboard */
.cmd-auth-overlay {
  position: fixed; inset: 0; background: var(--bg-primary); z-index: 50;
  display: flex; align-items: center; justify-content: center;
}

/* ===== MOCK SELECTOR ===== */
.mock-selector {
  display: flex; gap: 4px; padding: 3px; background: var(--bg-secondary);
  border-radius: var(--radius-sm); border: 1px solid var(--border); margin-bottom: 24px;
}
.mock-pill {
  flex: 1; padding: 8px 16px; text-align: center; border-radius: 6px; font-size: 13px;
  font-weight: 700; color: var(--text-muted); background: transparent; border: none;
  cursor: pointer; transition: var(--transition); font-family: inherit;
}
.mock-pill:hover { color: var(--text-secondary); }
.mock-pill.active { background: var(--accent); color: white; box-shadow: 0 2px 8px var(--accent-glow); }

/* ===== HEALTH CARDS ===== */
.health-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 28px;
}
.health-card {
  padding: 20px; border-radius: var(--radius-lg); border: 1px solid var(--border);
  background: var(--bg-card); position: relative; overflow: hidden;
  transition: var(--transition); cursor: default;
}
.health-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.health-card .hc-icon {
  font-size: 28px; margin-bottom: 8px;
}
.health-card .hc-value {
  font-size: 36px; font-weight: 900; line-height: 1;
}
.health-card .hc-label {
  font-size: 11px; font-weight: 700; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.8px; margin-top: 6px;
}
.health-card .hc-sub {
  font-size: 12px; color: var(--text-muted); margin-top: 4px;
}
.health-card .hc-glow {
  position: absolute; top: -40px; right: -40px; width: 120px; height: 120px;
  border-radius: 50%; filter: blur(50px); opacity: 0.15; pointer-events: none;
}
.health-card.hc-ready .hc-value { color: #22c55e; }
.health-card.hc-ready .hc-glow { background: #22c55e; }
.health-card.hc-risk .hc-value { color: #ef4444; }
.health-card.hc-risk .hc-glow { background: #ef4444; }
.health-card.hc-avg .hc-value {
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.health-card.hc-avg .hc-glow { background: var(--accent); }

/* ===== AP SCORE MINI CHART ===== */
.ap-dist-row {
  display: flex; gap: 6px; align-items: flex-end; height: 48px; margin-top: 8px;
}
.ap-dist-bar {
  flex: 1; border-radius: 4px 4px 0 0; min-height: 4px; transition: height 0.5s ease;
  position: relative;
}
.ap-dist-bar .ap-dist-count {
  position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  font-size: 10px; font-weight: 800; color: var(--text-secondary);
}
.ap-dist-labels {
  display: flex; gap: 6px; margin-top: 4px;
}
.ap-dist-labels span {
  flex: 1; text-align: center; font-size: 10px; font-weight: 700; color: var(--text-muted);
}

/* ===== SCORE HISTOGRAM ===== */
.histogram { margin-bottom: 24px; }
.histogram-bar-wrap {
  display: flex; align-items: center; gap: 10px; margin-bottom: 8px;
}
.histogram-label {
  font-size: 11px; font-weight: 700; color: var(--text-muted); min-width: 50px; text-align: right;
}
.histogram-bar-bg {
  flex: 1; height: 28px; background: var(--bg-secondary); border-radius: 6px; overflow: hidden;
  position: relative;
}
.histogram-bar {
  height: 100%; border-radius: 6px; transition: width 0.6s ease; display: flex;
  align-items: center; padding-left: 10px; font-size: 11px; font-weight: 800; color: white;
  min-width: fit-content;
}
.histogram-bar.ap1 { background: linear-gradient(90deg, #dc2626, #ef4444); }
.histogram-bar.ap2 { background: linear-gradient(90deg, #ea580c, #f97316); }
.histogram-bar.ap3 { background: linear-gradient(90deg, #ca8a04, #eab308); }
.histogram-bar.ap4 { background: linear-gradient(90deg, #2563eb, #3b82f6); }
.histogram-bar.ap5 { background: linear-gradient(90deg, #16a34a, #22c55e); }

/* ===== MCQ HEATMAP ===== */
.heatmap-section { margin-bottom: 24px; }
.heatmap-label {
  font-size: 11px; font-weight: 700; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.8px; margin-bottom: 8px;
}
.heatmap-grid {
  display: grid; gap: 4px;
}
.heatmap-grid.nc { grid-template-columns: repeat(15, 1fr); }
.heatmap-grid.calc { grid-template-columns: repeat(15, 1fr); }
.heatmap-cell {
  aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: 6px; font-size: 10px; font-weight: 700; cursor: pointer;
  transition: var(--transition); position: relative; border: 1px solid transparent;
}
.heatmap-cell:hover { transform: scale(1.15); z-index: 2; border-color: white; }
.heatmap-cell .hm-q { font-size: 9px; opacity: 0.8; }
.heatmap-cell .hm-pct { font-size: 11px; font-weight: 800; }
.heatmap-cell.hm-green { background: rgba(34,197,94,0.25); color: #86efac; }
.heatmap-cell.hm-yellow { background: rgba(234,179,8,0.3); color: #fde047; }
.heatmap-cell.hm-red { background: rgba(239,68,68,0.35); color: #fca5a5; }
.heatmap-cell.hm-dark { background: rgba(239,68,68,0.55); color: #fecaca; }

/* ===== FRQ CLASS BARS ===== */
.frq-bars { margin-bottom: 24px; }
.frq-bar-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
}
.frq-bar-label {
  font-size: 12px; font-weight: 700; color: var(--text-secondary); min-width: 36px;
}
.frq-bar-topic {
  font-size: 11px; color: var(--text-muted); min-width: 180px; max-width: 220px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.frq-bar-bg {
  flex: 1; height: 22px; background: var(--bg-secondary); border-radius: 6px; overflow: hidden;
}
.frq-bar-fill {
  height: 100%; border-radius: 6px; transition: width 0.6s ease; display: flex;
  align-items: center; justify-content: flex-end; padding-right: 8px;
  font-size: 11px; font-weight: 800; color: white;
}
.frq-bar-fill.fb-high { background: linear-gradient(90deg, #16a34a, #22c55e); }
.frq-bar-fill.fb-mid { background: linear-gradient(90deg, #ca8a04, #eab308); }
.frq-bar-fill.fb-low { background: linear-gradient(90deg, #dc2626, #ef4444); }

/* ===== MOVEMENT TABLE ===== */
.movement-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.movement-table th {
  text-align: left; padding: 10px 12px; font-weight: 700; color: var(--text-muted);
  border-bottom: 2px solid var(--border); font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.6px;
}
.movement-table td {
  padding: 10px 12px; border-bottom: 1px solid rgba(99,130,255,0.08); color: var(--text-secondary);
}
.movement-table tr:hover td { color: var(--text-primary); background: rgba(99,102,241,0.04); }
.delta-up { color: #22c55e; font-weight: 700; }
.delta-down { color: #ef4444; font-weight: 700; }
.delta-same { color: var(--text-muted); }
.trend-arrow { font-size: 16px; }

/* ===== AP BADGE (Large, for student profile) ===== */
.ap-badge-lg {
  width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center;
  justify-content: center; font-size: 32px; font-weight: 900; flex-shrink: 0;
}
.ap-badge-lg.ap5 { background: rgba(34,197,94,0.2); color: #22c55e; border: 2px solid rgba(34,197,94,0.3); }
.ap-badge-lg.ap4 { background: rgba(59,130,246,0.2); color: #60a5fa; border: 2px solid rgba(59,130,246,0.3); }
.ap-badge-lg.ap3 { background: rgba(234,179,8,0.2); color: #fbbf24; border: 2px solid rgba(234,179,8,0.3); }
.ap-badge-lg.ap2 { background: rgba(249,115,22,0.2); color: #fb923c; border: 2px solid rgba(249,115,22,0.3); }
.ap-badge-lg.ap1 { background: rgba(239,68,68,0.2); color: #f87171; border: 2px solid rgba(239,68,68,0.3); }

/* ===== STUDENT MCQ GRID ===== */
.mcq-grid-section { margin-bottom: 20px; }
.mcq-grid {
  display: grid; gap: 4px;
}
.mcq-grid.nc-grid { grid-template-columns: repeat(15, 1fr); }
.mcq-grid.calc-grid { grid-template-columns: repeat(15, 1fr); }
.mcq-cell {
  aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: 6px; font-size: 10px; font-weight: 700; cursor: pointer;
  transition: var(--transition); border: 1px solid transparent;
}
.mcq-cell:hover { transform: scale(1.15); z-index: 2; border-color: white; }
.mcq-cell.mc-right { background: rgba(34,197,94,0.25); color: #86efac; }
.mcq-cell.mc-wrong { background: rgba(239,68,68,0.35); color: #fca5a5; }
.mcq-cell .mc-icon { font-size: 12px; }

/* ===== COMPOSITE BREAKDOWN ===== */
.composite-breakdown {
  background: var(--bg-secondary); border-radius: var(--radius-sm); padding: 14px 16px;
  margin-top: 12px; font-size: 13px; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.composite-breakdown .cb-row {
  display: flex; justify-content: space-between; align-items: center; padding: 4px 0;
}
.composite-breakdown .cb-label { color: var(--text-muted); font-size: 12px; }
.composite-breakdown .cb-val { font-weight: 700; color: var(--text-primary); }
.composite-breakdown .cb-total {
  border-top: 1px solid var(--border); margin-top: 6px; padding-top: 8px;
  font-weight: 800; font-size: 15px;
}

/* ===== QUESTION DETAIL POPOVER ===== */
.q-detail-panel {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 16px; margin-top: 16px; animation: fadeIn 0.2s ease;
}
.q-detail-panel img {
  width: 100%; max-width: 600px; border-radius: 8px; background: white; margin: 12px 0;
}
.q-detail-answers {
  display: flex; gap: 12px; align-items: center; margin-top: 8px; font-size: 13px;
}
.q-detail-missed {
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border);
}
.q-detail-missed-list {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px;
}
.q-detail-missed-name {
  font-size: 11px; font-weight: 600; padding: 3px 8px; border-radius: 4px;
  background: rgba(239,68,68,0.15); color: #fca5a5;
}

/* Dashboard responsive */
@media (max-width: 900px) {
  .cmd-sidebar { width: 100%; min-width: 100%; max-height: 50vh; border-right: none; border-bottom: 1px solid var(--border); }
  .cmd-shell { flex-direction: column; }
  .cmd-main { padding: 16px; }
  .cmd-stats { grid-template-columns: repeat(2, 1fr); }
  .cmd-grid { grid-template-columns: 1fr; }
  .cmd-profile-header { flex-wrap: wrap; }
  .health-cards { grid-template-columns: repeat(2, 1fr); }
  .heatmap-grid.nc { grid-template-columns: repeat(10, 1fr); }
}