/* ============================================================
   IELTS Writing Assessor — Design System
   Modern Minimalist Dark Theme
   ============================================================ */

/* ── 1. FONTS & TOKENS ─────────────────────────────────── */
:root {
  /* Palette */
  --bg: #09090b;
  --surface: #111114;
  --surface-2: #18181c;
  --surface-3: #222228;
  --border: rgba(255, 255, 255, .07);
  --border-strong: rgba(255, 255, 255, .13);

  /* Ink */
  --ink: #f4f4f5;
  --ink-2: #a1a1aa;
  --ink-3: #71717a;

  /* Accent */
  --accent: #a78bfa;
  --accent-glow: rgba(167, 139, 250, .18);
  --accent-2: #818cf8;
  --accent-rgb: 167, 139, 250;

  /* Semantic */
  --good: #4ade80;
  --ok: #fbbf24;
  --bad: #f87171;
  --blue: #60a5fa;

  /* Geometry */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Shadow */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .5), 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 4px 16px rgba(0, 0, 0, .5), 0 1px 4px rgba(0, 0, 0, .4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, .6), 0 4px 12px rgba(0, 0, 0, .4);

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: .2s;
}

/* ── 2. RESET ───────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100dvh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background grid texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(var(--accent-rgb), .12) 0%, transparent 60%),
    linear-gradient(rgba(255, 255, 255, .015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .015) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ── 3. NAVIGATION ─────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 9, 11, .75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -.3px;
}

.nav-logo strong {
  color: var(--accent);
}

.logo-icon {
  font-size: 20px;
  color: var(--accent);
  filter: drop-shadow(0 0 8px rgba(var(--accent-rgb), .6));
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {

  0%,
  100% {
    filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), .5));
  }

  50% {
    filter: drop-shadow(0 0 14px rgba(var(--accent-rgb), .9));
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── 4. ICON BUTTON ────────────────────────────────────── */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  transition: background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform .1s var(--ease);
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--ink);
  border-color: var(--border-strong);
}

.icon-btn:active {
  transform: scale(.93);
}

/* ── 5. STATUS PILL ────────────────────────────────────── */
.status-pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-2);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  white-space: nowrap;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all var(--dur) var(--ease);
}

.status-pill:empty {
  display: none;
}

/* ── 6. SETTINGS DRAWER ────────────────────────────────── */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease);
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(420px, 100vw);
  background: var(--surface);
  border-left: 1px solid var(--border);
  z-index: 200;
  transform: translateX(100%);
  transition: transform .35s var(--ease);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.drawer-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.settings-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── 7. FORM FIELDS ────────────────────────────────────── */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
  text-transform: uppercase;
  letter-spacing: .6px;
}

.field-hint {
  font-size: 11px;
  color: var(--ink-3);
  font-family: 'JetBrains Mono', monospace;
}

.field-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
  -webkit-appearance: none;
}

.field-input:focus {
  border-color: var(--accent);
  background: var(--surface-3);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .15);
}

.field-input::placeholder {
  color: var(--ink-3);
}

/* Select arrow */
select.field-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

select option {
  background: var(--surface-2);
  color: var(--ink);
}

.field-textarea {
  resize: vertical;
  line-height: 1.7;
  min-height: 80px;
}

.essay-input {
  min-height: 220px;
  flex: 1;
}

/* ── 8. BUTTONS ────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  text-decoration: none;
  -webkit-appearance: none;
  user-select: none;
}

.btn:active {
  transform: scale(.96);
}

.btn-primary {
  background: var(--accent);
  color: #0f0a1e;
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(var(--accent-rgb), .3);
}

.btn-primary:hover {
  background: #b89ffb;
  box-shadow: 0 0 28px rgba(var(--accent-rgb), .45);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--ink-2);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-3);
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-3);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--ink-2);
  border-color: var(--border);
}

.btn-full {
  width: 100%;
}

/* ── 9. MAIN LAYOUT ────────────────────────────────────── */
.main {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

/* ── 10. HERO ──────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 20px 0 36px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(var(--accent-rgb), .25);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 20px;
  letter-spacing: .3px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  animation: blink 1.8s ease-in-out infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: .3;
  }
}

.hero-title {
  font-size: clamp(36px, 7vw, 64px);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 16px;
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 17px;
  color: var(--ink-2);
  font-weight: 400;
  max-width: 480px;
  margin: 0 auto;
}

/* ── 11. WORKSPACE ─────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: start;
}

@media (min-width: 1024px) {
  .workspace {
    grid-template-columns: 520px 1fr;
    align-items: start;
  }

  .input-panel {
    position: sticky;
    top: 78px;
    /* below the 58px nav + 20px gap */
  }
}

/* ── 12. PANELS ────────────────────────────────────────── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.input-panel {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── 13. STEPS ─────────────────────────────────────────── */
.step {
  padding: 22px 24px;
  border-bottom: 1px solid var(--border);
}

.step:last-of-type {
  border-bottom: none;
}

.step-grow {
  flex: 1;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.step-num {
  font-size: 11px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(var(--accent-rgb), .2);
  border-radius: var(--radius-sm);
  padding: 2px 7px;
  letter-spacing: .5px;
}

.step-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

/* ── 14. SEGMENTED CONTROL ─────────────────────────────── */
.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface-2);
}

.seg-btn {
  padding: 8px 6px;
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-right: 1px solid var(--border);
  background: transparent;
  color: var(--ink-3);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
  text-align: center;
}

.seg-btn:last-child {
  border-right: none;
}

.seg-btn.active {
  background: var(--surface-3);
  color: var(--ink);
  font-weight: 600;
  box-shadow: inset 0 1px 0 var(--border);
}

.seg-btn:hover:not(.active) {
  background: rgba(255, 255, 255, .04);
  color: var(--ink-2);
}

/* On very narrow screens, wrap to 2×2 */
@media (max-width: 380px) {
  .segmented {
    grid-template-columns: 1fr 1fr;
  }

  .seg-btn:nth-child(2) {
    border-right: none;
  }

  .seg-btn:nth-child(1),
  .seg-btn:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }
}


/* ── 15. TOPIC CONTROLS ────────────────────────────────── */
.topic-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-btns {
  display: flex;
  gap: 8px;
}

.custom-topic-group {
  display: none;
}

.custom-topic-group.visible {
  display: block;
}

/* ── 16. PANEL ACTIONS ─────────────────────────────────── */
.panel-actions {
  display: flex;
  gap: 8px;
  padding: 20px 24px 8px;
  flex-wrap: wrap;
}

.panel-actions .btn-primary {
  flex: 1;
  min-width: 160px;
  padding: 12px 20px;
  font-size: 14px;
}

.status-inline {
  padding: 0 24px 18px;
  font-size: 12.5px;
  color: var(--ink-2);
  font-family: 'JetBrains Mono', monospace;
  min-height: 24px;
}

/* ── 17. RESULTS PANEL ─────────────────────────────────── */
.results-panel {
  display: none;
}

.results-panel.visible {
  display: block;
}

/* Score hero */
.score-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px;
  background: linear-gradient(135deg,
      rgba(var(--accent-rgb), .08) 0%,
      rgba(129, 140, 248, .06) 100%);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.score-label {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.score-value {
  font-size: 60px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent) 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
}

.chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chip {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink-2);
  font-family: 'JetBrains Mono', monospace;
}

.results-body {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── 18. CRITERION SECTIONS ────────────────────────────── */
.crit {
  padding: 22px 28px;
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: background var(--dur) var(--ease);
}

.crit:last-of-type {
  border-bottom: none;
}

.crit-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.crit-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.crit-badge {
  font-size: 11px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-2);
}

.crit.good .crit-badge {
  background: rgba(74, 222, 128, .12);
  border-color: rgba(74, 222, 128, .3);
  color: var(--good);
}

.crit.ok .crit-badge {
  background: rgba(251, 191, 36, .12);
  border-color: rgba(251, 191, 36, .3);
  color: var(--ok);
}

.crit.bad .crit-badge {
  background: rgba(248, 113, 113, .12);
  border-color: rgba(248, 113, 113, .3);
  color: var(--bad);
}

/* Left colored edge */
.crit::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--border-strong);
  border-radius: 0 2px 2px 0;
}

.crit.good::before {
  background: var(--good);
}

.crit.ok::before {
  background: var(--ok);
}

.crit.bad::before {
  background: var(--bad);
}

/* Content inside .crit */
.crit .content p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-bottom: 10px;
}

.crit .content h4 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--ink-3);
  margin: 12px 0 6px;
}

.crit .content ul {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.crit .content li {
  font-size: 13px;
  color: var(--ink-2);
}

.badge {
  display: none;
  /* hidden, we use crit-badge instead */
}

/* ── 19. RESULT BLOCKS ─────────────────────────────────── */
.result-block {
  padding: 22px 28px;
  border-bottom: 1px solid var(--border);
}

.result-block:last-child {
  border-bottom: none;
}

.result-block-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.result-block-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.title-badge {
  font-size: 10px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(var(--accent-rgb), .15);
  border: 1px solid rgba(var(--accent-rgb), .25);
  color: var(--accent);
  letter-spacing: .3px;
}

.result-block-hint {
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 12px;
}

/* ── 20. ANNOTATION LEGEND ─────────────────────────────── */
.annotation-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.legend-item {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  border-bottom: 2px solid transparent;
}

.legend-grammar {
  border-color: var(--bad);
  color: var(--bad);
  background: rgba(248, 113, 113, .08);
}

.legend-vocabulary {
  border-color: var(--good);
  color: var(--good);
  background: rgba(74, 222, 128, .08);
}

.legend-cohesion {
  border-color: var(--ok);
  color: var(--ok);
  background: rgba(251, 191, 36, .08);
}

.legend-spelling {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(96, 165, 250, .08);
}

/* ── 21. ESSAY PREVIEW ─────────────────────────────────── */
.essay-preview {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── 22. ERRORS LIST ───────────────────────────────────── */
.errors-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 18px;
}

.errors-list li {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.6;
}

.errors-list b {
  color: var(--ink);
  font-weight: 600;
}

.errors-list i {
  color: var(--accent);
  font-style: normal;
  font-weight: 500;
}

.errors-list .hint {
  font-size: 11.5px;
  color: var(--ink-3);
  font-family: 'JetBrains Mono', monospace;
}

.errors-list .mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: var(--ink-3);
}

/* ── 23. INLINE ANNOTATIONS ────────────────────────────── */
.inline-err {
  padding: 1px 2px;
  border-radius: 3px;
  cursor: pointer;
  position: relative;
}

.inline-err-grammar {
  background: rgba(248, 113, 113, .12);
  border-bottom: 2px solid var(--bad);
}

.inline-err-vocabulary {
  background: rgba(74, 222, 128, .07);
  border-bottom: 2px solid var(--good);
}

.inline-err-cohesion {
  background: rgba(251, 191, 36, .07);
  border-bottom: 2px solid var(--ok);
}

.inline-err-spelling {
  background: rgba(96, 165, 250, .07);
  border-bottom: 2px dashed var(--blue);
}

/* ── 24. TOOLTIP ───────────────────────────────────────── */
.tooltip {
  position: fixed;
  z-index: 999;
  padding: 10px 14px;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-2);
  font-size: 12.5px;
  line-height: 1.5;
  max-width: 300px;
  pointer-events: none;
  white-space: pre-wrap;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .15s var(--ease), transform .15s var(--ease);
}

.tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 25. EMPTY STATE ───────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  border-style: dashed;
}

.empty-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-3);
  margin-bottom: 20px;
}

.empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 8px;
}

.empty-hint {
  font-size: 13.5px;
  color: var(--ink-3);
  max-width: 280px;
}

.empty-hint strong {
  color: var(--accent);
  font-weight: 600;
}

/* ── 26. FOOTER ────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px 20px;
  font-size: 13px;
  color: var(--ink-3);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-sep {
  color: var(--border-strong);
}

.heart {
  animation: heartbeat 2s ease-in-out infinite;
  display: inline-block;
}

@keyframes heartbeat {

  0%,
  100% {
    transform: scale(1);
  }

  15% {
    transform: scale(1.2);
  }

  30% {
    transform: scale(1);
  }
}

/* ── 27. LOADING STATE ─────────────────────────────────── */
@keyframes shimmer {
  0% {
    background-position: -400px 0;
  }

  100% {
    background-position: 400px 0;
  }
}

.loading-overlay {
  position: relative;
  overflow: hidden;
}

.loading-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
      transparent 0%,
      rgba(var(--accent-rgb), .04) 40%,
      rgba(var(--accent-rgb), .08) 50%,
      rgba(var(--accent-rgb), .04) 60%,
      transparent 100%);
  background-size: 800px 100%;
  animation: shimmer 1.6s infinite;
}

/* ── 28. RESPONSIVE ────────────────────────────────────── */
@media (max-width: 600px) {
  .main {
    padding: 24px 12px 48px;
  }

  .hero {
    padding: 12px 0 24px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .step {
    padding: 18px 16px;
  }

  .panel-actions {
    padding: 16px 16px 6px;
  }

  .status-inline {
    padding: 0 16px 14px;
  }

  .score-hero {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  .score-value {
    font-size: 48px;
  }

  .crit,
  .result-block {
    padding: 18px 16px;
  }

  .drawer {
    width: 100vw;
  }

  .settings-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 400px) {
  .topic-btns {
    flex-direction: column;
  }

  .topic-btns .btn {
    width: 100%;
  }
}

/* ── 29. SCROLLBAR ─────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--surface-3);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
}

/* ── 30. SELECTION ─────────────────────────────────────── */
::selection {
  background: rgba(var(--accent-rgb), .25);
  color: var(--ink);
}