/* =========================================================
   Quiz Platform Live — Glassmorphic Dark UI
   Fonts: Syne (display) · Manrope (body) · JetBrains Mono (code)
   All class names identical to prior version; only visuals changed.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=Manrope:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── 1. Design Tokens ─────────────────────────────────── */
:root {
  --bg:              #050912;
  --bg-2:            #070e1c;
  --surface:         rgba(11,19,38,0.72);
  --surface-soft:    rgba(15,25,50,0.60);
  --surface-border:  rgba(99,129,230,0.18);
  --surface-glow:    rgba(99,102,241,0.08);
  --muted:           #7e91b8;
  --muted-2:         #49577a;
  --text:            #e8eeff;
  --text-dim:        #bccae8;
  --primary:         #6366f1;
  --primary-bright:  #818cf8;
  --primary-glow:    rgba(99,102,241,0.35);
  --accent:          #06b6d4;
  --accent-glow:     rgba(6,182,212,0.28);
  --success:         #34d399;
  --success-dim:     rgba(52,211,153,0.15);
  --warning:         #fbbf24;
  --danger:          #f87171;
  --danger-dim:      rgba(248,113,113,0.14);
  --gold:            #fcd34d;
  --silver:          #94a3b8;
  --bronze:          #f97316;

  --radius:          14px;
  --radius-sm:       8px;
  --radius-lg:       20px;
  --space-1:         8px;
  --space-2:         18px;
  --space-3:         28px;

  --blur:            blur(18px) saturate(160%);
  --blur-sm:         blur(10px) saturate(140%);

  --shadow-card:     0 4px 32px rgba(4,8,20,0.55), 0 1px 3px rgba(4,8,20,0.4);
  --shadow-float:    0 12px 40px rgba(4,8,20,0.65), 0 2px 8px rgba(99,102,241,0.12);
  --shadow-glow:     0 0 0 1px var(--surface-border), 0 4px 32px rgba(4,8,20,0.55);

  --font-display:    'Syne', system-ui, sans-serif;
  --font-body:       'Manrope', system-ui, sans-serif;
  --font-mono:       'JetBrains Mono', 'Cascadia Code', monospace;
}

/* ── 2. Reset & Base ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 15% 0%, rgba(99,102,241,0.12) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 85% 15%, rgba(6,182,212,0.07) 0%, transparent 50%),
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(99,102,241,0.05) 0%, transparent 55%);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background noise/grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.028'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  pointer-events: none;
  z-index: 0;
}

/* ── 3. Skip Link (a11y) ──────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  z-index: 9999;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.15s;
}
.skip-link:focus { top: var(--space-1); }

/* ── 4. Shell & Layout ────────────────────────────────── */
.app-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 95vw);
  margin: var(--space-2) auto;
  padding-bottom: var(--space-3);
}

/* ── 5. Topbar ────────────────────────────────────────── */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-2);
  gap: var(--space-2);
  padding: var(--space-2) var(--space-2);
  background: var(--surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.topbar h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #e8eeff 30%, var(--primary-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.topbar p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.01em;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

/* ── 6. Nav ───────────────────────────────────────────── */
.main-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
}

.main-nav .active-nav {
  background: rgba(99,102,241,0.15) !important;
  border-color: rgba(99,102,241,0.5) !important;
  color: var(--primary-bright) !important;
  box-shadow: 0 0 12px rgba(99,102,241,0.15);
}

/* ── 7. Typography ────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

h2 {
  margin: 0 0 6px;
  font-size: clamp(20px, 3.5vw, 26px);
  font-weight: 700;
  background: linear-gradient(135deg, #e8eeff 40%, var(--primary-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h3 {
  margin: var(--space-2) 0 var(--space-1);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dim);
}

h4 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
}

p { margin: 0 0 var(--space-1); }

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

p.muted { font-size: 14px; }

/* ── 8. Screen Container ─────────────────────────────── */
.screen {
  display: none;
  background: var(--surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-float);
  animation: fadeSlideIn 0.22s ease both;
}

.screen.active { display: block; }

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

/* ── 9. Global Error Banner ──────────────────────────── */
#global-error { margin-bottom: var(--space-2); }

.banner {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid;
  font-size: 14px;
  font-weight: 500;
}

.banner.error {
  background: var(--danger-dim);
  border-color: rgba(248,113,113,0.4);
  color: #fecaca;
}

/* ── 10. Form Elements ───────────────────────────────── */
label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.01em;
}

input, select {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid rgba(65,83,121,0.6);
  padding: 11px 14px;
  background: rgba(8,14,30,0.7);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color 0.18s, box-shadow 0.18s;
}

input::placeholder { color: var(--muted-2); }

input:focus, select:focus {
  outline: none;
  border-color: rgba(99,102,241,0.65);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15), inset 0 1px 2px rgba(0,0,0,0.2);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%237e91b8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* ── 11. Buttons ─────────────────────────────────────── */
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 11px 18px;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease, opacity 0.14s ease, background 0.14s ease;
  letter-spacing: 0.015em;
  position: relative;
  overflow: hidden;
}

button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.40);
  background: #7173f4;
}

button:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(99,102,241,0.25);
}

button:focus-visible {
  outline: 2px solid var(--primary-bright);
  outline-offset: 2px;
}

button:disabled { opacity: 0.45; cursor: not-allowed; }

button.ghost {
  background: rgba(15,25,52,0.6);
  backdrop-filter: var(--blur-sm);
  border: 1px solid rgba(65,83,121,0.55);
  color: var(--text-dim);
}

button.ghost:hover:not(:disabled) {
  background: rgba(30,42,80,0.75);
  border-color: rgba(99,102,241,0.45);
  color: var(--text);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

button.demo {
  background: linear-gradient(135deg, #065f46, #047857);
  box-shadow: 0 4px 16px rgba(5,150,105,0.25);
}

button.demo:hover:not(:disabled) {
  background: linear-gradient(135deg, #047857, #059669);
  box-shadow: 0 8px 24px rgba(5,150,105,0.40);
}

button.small {
  width: auto;
  padding: 8px 14px;
  font-size: 13px;
}

.actions {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin-top: var(--space-1);
}

.actions > * {
  flex: 1;
  min-width: 140px;
}

/* ── 12. Status Messages ─────────────────────────────── */
.status {
  margin-top: var(--space-1);
  font-size: 13px;
  color: var(--muted);
  min-height: 20px;
}

.status.success { color: var(--success); }
.status.error   { color: var(--danger); }

/* ── 13. Chips & Badges ──────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid rgba(65,83,121,0.6);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--primary-bright);
  background: rgba(99,102,241,0.08);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.chip::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

/* ── 14. Hero Section ────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-3);
  align-items: start;
}

.hero h2 {
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 800;
  margin: 0 0 12px;
  line-height: 1.18;
}

.hero > div:first-child > p.muted {
  font-size: 15px;
  line-height: 1.65;
  max-width: 38ch;
  margin-bottom: var(--space-2);
}

.screenshot-stack { display: grid; gap: var(--space-1); }

.screenshot-card {
  background: var(--surface-soft);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: var(--space-1);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.screenshot-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-float);
}

.screenshot-card h3 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
}

.screenshot-card p.muted { font-size: 12px; margin-bottom: 8px; }

.screenshot-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(40,55,90,0.6);
  display: block;
}

/* ── 15. Credential Grid ─────────────────────────────── */
.cred-grid {
  margin-top: var(--space-3);
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: var(--space-1);
}

.cred-grid article {
  background: var(--surface-soft);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  text-align: center;
  transition: transform 0.2s ease;
}

.cred-grid article:hover { transform: translateY(-2px); }

.cred-grid strong {
  display: block;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--primary-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── 16. Testimonial ─────────────────────────────────── */
.testimonial-strip {
  margin-top: var(--space-2);
  padding: var(--space-2);
  background: var(--surface-soft);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--surface-border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
}

/* ── 17. Auth Tabs ────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: var(--space-1);
  background: rgba(5,10,22,0.5);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 5px;
}

.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 13px;
  padding: 8px 16px;
}

.tab.active {
  background: rgba(99,102,241,0.18);
  border-color: rgba(99,102,241,0.4);
  color: var(--primary-bright);
}

.tab:hover:not(.active):not(:disabled) {
  background: rgba(99,102,241,0.07);
  color: var(--text-dim);
  transform: none;
  box-shadow: none;
}

.auth-form {
  display: none;
  gap: var(--space-1);
  background: transparent;
  border: none;
  padding: 0;
}

.auth-form.active { display: grid; }

/* ── 18. Info / Dashboard Grid ───────────────────────── */
.info-grid {
  margin-top: var(--space-2);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-1);
}

.info-grid article,
.question-card,
.edge-card,
.dsa-card {
  background: var(--surface-soft);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dashboard-grid article:first-child { grid-column: span 2; }

/* ── 19. Live Head (session header row) ──────────────── */
.live-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
  flex-wrap: wrap;
}

.live-head h2 { margin: 0; }

/* ── 20. Timer ───────────────────────────────────────── */
.timer {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  min-width: 64px;
  text-align: right;
  transition: color 0.3s ease;
}

.timer.warning {
  color: var(--danger);
  text-shadow: 0 0 12px rgba(248,113,113,0.5);
  animation: timer-blink 0.6s ease-in-out infinite alternate;
}

@keyframes timer-blink {
  from { opacity: 1; }
  to   { opacity: 0.55; }
}

.timer.pulse {
  animation: none;
}

/* ── 21. Question Card ───────────────────────────────── */
.question-card {
  margin-bottom: var(--space-1);
}

.question-card h3 {
  margin: 0 0 var(--space-2);
  font-size: clamp(15px, 2.5vw, 17px);
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
}

.question-card.shift {
  animation: qShift 0.22s cubic-bezier(0.22,1,0.36,1);
}

@keyframes qShift {
  from { transform: translateX(-6px) scale(0.99); opacity: 0.7; }
  to   { transform: translateX(0) scale(1); opacity: 1; }
}

/* ── 22. Answer Options ──────────────────────────────── */
.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

.option-btn {
  background: rgba(10,18,38,0.7);
  border: 1px solid rgba(65,83,121,0.55);
  color: var(--text-dim);
  font-size: 14px;
  text-align: left;
  padding: 14px 16px;
  border-radius: var(--radius);
  transition: all 0.16s ease;
  justify-content: flex-start;
}

.option-btn:hover:not(:disabled) {
  background: rgba(99,102,241,0.12);
  border-color: rgba(99,102,241,0.5);
  color: var(--text);
  transform: none;
  box-shadow: 0 2px 12px rgba(99,102,241,0.15);
}

.option-btn.correct {
  background: var(--success-dim) !important;
  border-color: var(--success) !important;
  color: var(--success) !important;
  box-shadow: 0 0 16px rgba(52,211,153,0.2) !important;
}

.option-btn.wrong {
  background: var(--danger-dim) !important;
  border-color: var(--danger) !important;
  color: var(--danger) !important;
}

/* ── 23. Players List ────────────────────────────────── */
.players, .leaderboard {
  list-style: none;
  margin: var(--space-1) 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.players li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-1);
  background: rgba(10,18,38,0.65);
  border: 1px solid rgba(65,83,121,0.4);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  transition: border-color 0.18s;
}

.player-badge {
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(52,211,153,0.12);
  border: 1px solid rgba(52,211,153,0.3);
  color: var(--success);
}

/* ── 24. Leaderboard ─────────────────────────────────── */
.leaderboard li {
  background: rgba(10,18,38,0.65);
  border: 1px solid rgba(65,83,121,0.4);
  border-radius: var(--radius-sm);
  padding: 11px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  position: relative;
}

.leaderboard li.bump {
  transform: scale(1.012);
  border-color: var(--accent) !important;
  box-shadow: 0 0 12px var(--accent-glow);
  animation: bumpPop 0.26s ease;
}

@keyframes bumpPop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.018); }
  100% { transform: scale(1.012); }
}

.leaderboard li.top-1 {
  border-color: rgba(252,211,77,0.6) !important;
  background: rgba(252,211,77,0.06) !important;
  color: var(--gold);
  box-shadow: 0 0 0 1px rgba(252,211,77,0.15), inset 0 1px 0 rgba(252,211,77,0.1);
}

.leaderboard li.top-2 {
  border-color: rgba(148,163,184,0.5) !important;
  color: var(--silver);
}

.leaderboard li.top-3 {
  border-color: rgba(249,115,22,0.5) !important;
  color: var(--bronze);
}

/* ── 25. DSA Cards ───────────────────────────────────── */
.dsa-grid {
  margin-top: var(--space-1);
  display: grid;
  gap: var(--space-1);
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.dsa-card {
  padding: var(--space-1) var(--space-1);
  position: relative;
  overflow: hidden;
}

.dsa-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  right: 0; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.25s;
}

.dsa-card.active {
  border-color: rgba(6,182,212,0.55) !important;
  box-shadow: 0 0 20px rgba(6,182,212,0.12), inset 0 0 16px rgba(6,182,212,0.04) !important;
}

.dsa-card.active::before { opacity: 1; }

.dsa-card .chip {
  font-size: 11px;
  padding: 2px 8px;
  margin-top: 6px;
}

/* ── 26. Mini Chart (Dashboard) ──────────────────────── */
.mini-chart {
  height: 80px;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 8px 4px 0;
}

.mini-chart span {
  flex: 1;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--primary-bright), rgba(99,102,241,0.4));
  min-height: 20%;
  transition: height 0.4s ease;
}

/* ── 27. Plain List ──────────────────────────────────── */
.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.plain-list li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(65,83,121,0.25);
  font-size: 13px;
  color: var(--text-dim);
}

.plain-list li:last-child { border-bottom: none; }

/* ── 28. Sync Label ──────────────────────────────────── */
.sync-label {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--muted);
}

/* ── 29. Runtime Feed ────────────────────────────────── */
.runtime-feed {
  margin-top: var(--space-1);
  max-height: 140px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--muted-2) transparent;
}

.runtime-feed li {
  padding: 5px 0;
  border-bottom: 1px dashed rgba(65,83,121,0.35);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
}

/* ── 30. Pre / Code ──────────────────────────────────── */
pre {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(65,83,121,0.4);
  background: rgba(4,8,20,0.8);
  color: #a5f3c0;
  font-family: var(--font-mono);
  font-size: 12px;
  overflow: auto;
  line-height: 1.6;
}

/* ── 31. Loading ─────────────────────────────────────── */
.loading-row {
  min-height: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(65,83,121,0.4);
  border-top-color: var(--primary-bright);
  animation: spin 0.75s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── 32. Skeleton ────────────────────────────────────── */
.skeleton {
  border: 1px solid rgba(65,83,121,0.3);
  border-radius: var(--radius);
  padding: var(--space-1);
  margin-bottom: var(--space-1);
}

.skeleton-line {
  height: 13px;
  border-radius: 6px;
  margin-bottom: 8px;
  background: linear-gradient(90deg,
    rgba(20,32,62,1) 25%,
    rgba(35,52,95,0.8) 50%,
    rgba(20,32,62,1) 75%);
  background-size: 300% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

.skeleton-line.short { width: 55%; }

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.skeleton-grid span {
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg,
    rgba(20,32,62,1) 25%,
    rgba(35,52,95,0.8) 50%,
    rgba(20,32,62,1) 75%);
  background-size: 300% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── 33. Edge / Empty Card ───────────────────────────── */
.edge-card {
  margin-top: var(--space-1);
  border-style: dashed;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  padding: var(--space-2);
}

/* ── 34. Kick Controls ───────────────────────────────── */
.kick-controls {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--space-1);
  margin-top: var(--space-1);
}

/* ── 35. Toggle Checkboxes ───────────────────────────── */
.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
  cursor: pointer;
}

.toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ── 36. Responsive ──────────────────────────────────── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .dashboard-grid article:first-child { grid-column: span 1; }
  .screenshot-stack { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  .app-shell { width: 97vw; margin: var(--space-1) auto; }
  .topbar { flex-direction: column; align-items: flex-start; padding: var(--space-1) 14px; }
  .topbar h1 { font-size: 20px; }
  .screen { padding: var(--space-2) 14px; }
  .cred-grid { grid-template-columns: 1fr; }
  .kick-controls { grid-template-columns: 1fr; }
  .dsa-grid { grid-template-columns: repeat(2, 1fr); }
  .screenshot-stack { grid-template-columns: 1fr; }
  .options { grid-template-columns: 1fr; }
  .hero h2 { font-size: 22px; }
  .tabs { flex-direction: column; }
  .actions > * { min-width: 100%; }
}

/* ── 37. Reduced Motion ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── 38. High Contrast ───────────────────────────────── */
@media (forced-colors: active) {
  .topbar, .screen, .cred-grid article, .dsa-card,
  .info-grid article, .question-card, .edge-card {
    border: 2px solid ButtonText;
  }
}