:root {
  color-scheme: dark;
  --bg: oklch(0.17 0.02 260);
  --bg-2: oklch(0.22 0.03 255);
  --panel: color-mix(in oklab, white 8%, transparent);
  --panel-2: color-mix(in oklab, white 12%, transparent);
  --text: oklch(0.97 0.01 250);
  --muted: oklch(0.77 0.03 250);
  --accent: oklch(0.75 0.17 155);
  --accent-2: oklch(0.72 0.14 280);
  --accent-3: oklch(0.8 0.12 95);
  --border: color-mix(in oklab, white 15%, transparent);
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
}

:root[data-theme='light'] {
  color-scheme: light;
  --bg: oklch(0.98 0.01 250);
  --bg-2: oklch(0.94 0.02 255);
  --panel: rgba(255, 255, 255, 0.76);
  --panel-2: rgba(255, 255, 255, 0.92);
  --text: oklch(0.23 0.03 255);
  --muted: oklch(0.49 0.03 255);
  --accent: oklch(0.68 0.16 165);
  --accent-2: oklch(0.63 0.15 280);
  --accent-3: oklch(0.82 0.11 92);
  --border: rgba(15, 23, 42, 0.09);
  --shadow: 0 24px 64px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, color-mix(in oklab, var(--accent-2) 22%, transparent), transparent 30%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
}
button, input, select, textarea { font: inherit; }
button { border: 0; cursor: pointer; }
strong { font-weight: 800; }

.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px 40px;
}

.reader-card {
  position: relative;
  width: min(100%, 480px);
  overflow: hidden;
  border-radius: 32px;
  padding: 20px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.reader-card__glow {
  position: absolute;
  inset: -14% auto auto -8%;
  width: 180px;
  aspect-ratio: 1;
  border-radius: 999px;
  background: color-mix(in oklab, var(--accent) 48%, transparent);
  filter: blur(48px);
  opacity: 0.72;
  pointer-events: none;
}

.topbar,
.hero-panel__meta,
.reader-panel__header,
.word-modal__header,
.action-row,
.stats-grid,
.word-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar { margin-bottom: 18px; }
.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 30px; }
h2 { margin-bottom: 8px; font-size: 22px; }
h3 { margin-bottom: 0; font-size: 18px; }

.icon-button,
.chip,
.primary-button,
.ghost-button,
.word-token,
.field__input {
  transition: transform 160ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}
.icon-button:hover,
.chip:hover,
.primary-button:hover,
.ghost-button:hover,
.word-token:hover {
  transform: translateY(-2px);
}
.icon-button:active,
.chip:active,
.primary-button:active,
.ghost-button:active,
.word-token:active {
  transform: scale(0.98);
}

.icon-button {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.hero-panel,
.settings-panel,
.reader-panel {
  padding: 18px;
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--bg) 30%, transparent);
  border: 1px solid var(--border);
}

.hero-panel { margin-bottom: 14px; }
.status-badge,
.tg-badge {
  display: inline-flex;
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}
.status-badge {
  background: color-mix(in oklab, var(--accent) 18%, transparent);
}
.tg-badge {
  background: color-mix(in oklab, var(--accent-2) 16%, transparent);
  color: var(--muted);
}
.hint {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.5;
}

.settings-panel {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}
.field {
  display: grid;
  gap: 8px;
}
.field__label {
  font-size: 14px;
  color: var(--muted);
}
.field-grid,
.quick-presets {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.field__input {
  width: 100%;
  min-height: 48px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel-2) 80%, transparent);
  color: var(--text);
  padding: 0 14px;
  outline: none;
}
.field__input:focus,
.range-input:focus,
.word-token:focus {
  border-color: color-mix(in oklab, var(--accent) 55%, white 10%);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 20%, transparent);
}
.range-input {
  width: 100%;
  accent-color: color-mix(in oklab, var(--accent) 70%, var(--accent-2));
}
.chip {
  min-height: 42px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--panel-2) 78%, transparent);
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 700;
}
.chip.is-active {
  background: linear-gradient(135deg, color-mix(in oklab, var(--accent) 90%, white 5%), color-mix(in oklab, var(--accent-2) 80%, white 5%));
  color: white;
  border-color: transparent;
}
.chip--outline {
  min-width: max-content;
  padding: 0 14px;
}
.stats-grid {
  align-items: stretch;
}
.stat-card {
  flex: 1;
  padding: 14px 16px;
  border-radius: 18px;
  background: color-mix(in oklab, var(--panel-2) 65%, transparent);
  border: 1px solid var(--border);
}
.stat-card__label {
  display: block;
  color: var(--muted);
  margin-bottom: 6px;
  font-size: 13px;
}
.stat-card strong {
  font-size: 20px;
}

.action-row {
  margin-bottom: 14px;
}
.primary-button,
.ghost-button {
  min-height: 54px;
  border-radius: 18px;
  font-weight: 800;
  font-size: 16px;
}
.primary-button {
  flex: 1.2;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 18px 34px color-mix(in oklab, var(--accent-2) 24%, transparent);
}
.ghost-button {
  flex: 0.8;
  background: color-mix(in oklab, var(--panel-2) 70%, transparent);
  color: var(--text);
  border: 1px solid var(--border);
}

.reader-output {
  margin-top: 14px;
  line-height: 1.85;
  font-size: 16px;
}
.reader-output.empty {
  color: var(--muted);
}
.word-token {
  display: inline-flex;
  align-items: center;
  margin: 0 3px 8px 0;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--accent) 35%, transparent);
  background: color-mix(in oklab, var(--accent) 15%, transparent);
  color: var(--text);
}
.word-token.is-known {
  border-color: color-mix(in oklab, var(--accent-3) 55%, transparent);
  background: color-mix(in oklab, var(--accent-3) 22%, transparent);
}
.word-token.is-new {
  border-color: color-mix(in oklab, var(--accent-2) 48%, transparent);
  background: color-mix(in oklab, var(--accent-2) 18%, transparent);
}
.plain-token {
  margin-right: 3px;
}

.word-modal {
  width: min(100% - 24px, 440px);
  border: 0;
  padding: 0;
  background: transparent;
}
.word-modal::backdrop {
  background: rgba(2, 6, 23, 0.6);
  backdrop-filter: blur(6px);
}
.word-modal__sheet {
  padding: 18px;
  border-radius: 26px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow);
}
.word-meta {
  margin: 16px 0;
  align-items: stretch;
}
.word-meta > div {
  flex: 1;
  padding: 12px 14px;
  border-radius: 16px;
  background: color-mix(in oklab, var(--panel-2) 70%, transparent);
  border: 1px solid var(--border);
}
.word-meta__label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.modal-sentence {
  margin-bottom: 16px;
  color: var(--muted);
  line-height: 1.55;
}
.dictionary-sheet {
  max-height: 75vh;
  overflow: auto;
}
.dictionary-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}
.dictionary-item {
  padding: 12px 14px;
  border-radius: 16px;
  background: color-mix(in oklab, var(--panel-2) 68%, transparent);
  border: 1px solid var(--border);
}
.dictionary-item strong {
  display: block;
  margin-bottom: 4px;
}
.dictionary-item span {
  color: var(--muted);
  font-size: 14px;
}
.empty-note {
  color: var(--muted);
  padding: 8px 0;
}

@media (max-width: 480px) {
  .reader-card { padding: 16px; border-radius: 28px; }
  .field-grid,
  .quick-presets,
  .stats-grid,
  .word-meta,
  .action-row,
  .reader-panel__header {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }
  .reader-panel__header .chip--outline { width: 100%; }
}