/* Little Lessons — storybook reader
   Warm, kid-friendly palette built on the Prometheus web-ui-framework tokens. */

:root {
  /* Warm storybook surface palette */
  --bg-primary: #fff8f0;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #fff2e2;
  --bg-glass: rgba(255, 255, 255, 0.75);

  --border-subtle: rgba(120, 82, 40, 0.14);
  --border-accent: rgba(245, 158, 11, 0.45);

  --text-primary: #2c2115;
  --text-secondary: #6b5844;
  --text-muted: #97836c;

  --accent-cyan: #0ea5e9;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gap-fluid: clamp(0.75rem, 1.5vw, 1.5rem);

  --font-display: 'Fredoka', system-ui, sans-serif;
  --font-sans: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --btn-radius: var(--radius-pill);
  --shadow-soft: 0 10px 30px -12px rgba(120, 82, 40, 0.35);
  --shadow-card: 0 18px 50px -20px rgba(120, 82, 40, 0.45);

  /* Shoelace primary -> storybook amber */
  --sl-color-primary-50: #fff7ed;
  --sl-color-primary-100: #ffedd5;
  --sl-color-primary-200: #fed7aa;
  --sl-color-primary-300: #fdba74;
  --sl-color-primary-400: #fb923c;
  --sl-color-primary-500: #f59e0b;
  --sl-color-primary-600: #ea9806;
  --sl-color-primary-700: #c2740a;
  --sl-color-primary-800: #9a5a0c;
  --sl-color-primary-900: #7c460f;
}

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

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

body {
  min-height: 100dvh;
  background:
    radial-gradient(1200px 600px at 50% -10%, #ffe9c9 0%, transparent 60%),
    var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-weight: 500;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

img { max-width: 100%; display: block; }
[hidden] { display: none !important; }

/* ---------- Shell ---------- */
.reader {
  min-height: 100dvh;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--gap-fluid);
}

/* ---------- Loading ---------- */
.reader__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ---------- Story ---------- */
.story {
  width: 100%;
  max-width: 760px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--gap-fluid);
  min-height: min(100dvh - 2 * var(--gap-fluid), 900px);
}

.story__bar {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.grownups {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-pill);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.grownups:hover { color: var(--text-primary); background: var(--bg-surface-elevated); }
@media (max-width: 480px) {
  .grownups { font-size: 0; padding: 0.5rem; }
  .grownups::after { content: "👪"; font-size: 1.2rem; }
}

.story__badge {
  font-size: 1.5rem;
  line-height: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: color-mix(in srgb, var(--accent-amber) 16%, transparent);
  border-radius: var(--radius-pill);
}

.story__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 1rem + 1vw, 1.5rem);
  text-align: center;
  letter-spacing: 0.01em;
}

.icon-btn {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.icon-btn:hover { transform: translateY(-2px); border-color: var(--border-accent); }
.icon-btn[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent-amber) 22%, var(--bg-surface));
  border-color: var(--border-accent);
}

/* ---------- Stage / panel ---------- */
.story__stage {
  display: grid;
  place-items: center;
}

.panel {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--gap-fluid);
  animation: panel-in 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.panel.is-back { animation-name: panel-in-back; }

@keyframes panel-in {
  from { opacity: 0; transform: translateX(24px) scale(0.99); }
  to { opacity: 1; transform: none; }
}
@keyframes panel-in-back {
  from { opacity: 0; transform: translateX(-24px) scale(0.99); }
  to { opacity: 1; transform: none; }
}

.panel__frame {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.panel__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.panel__text {
  font-size: clamp(1.2rem, 1rem + 1.6vw, 1.7rem);
  line-height: 1.45;
  font-weight: 700;
  text-align: center;
  text-wrap: balance;
  color: var(--text-primary);
  padding: 0 clamp(0.25rem, 1vw, 1rem);
}

/* ---------- Controls ---------- */
.story__controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
}

sl-button { min-height: 44px; }
.nav-btn { --sl-button-font-size: 1rem; min-height: 48px; }
.nav-btn::part(base) { border-radius: var(--btn-radius); height: 100%; }
.nav-btn--primary::part(base) { font-weight: 800; }

.dots {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
}
.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--text-muted) 40%, transparent);
  transition: transform 0.2s ease, background 0.2s ease;
}
.dot.is-active {
  background: var(--accent-amber);
  transform: scale(1.35);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-amber) 22%, transparent);
}
.dot.is-done { background: color-mix(in srgb, var(--accent-emerald) 70%, transparent); }

/* ---------- Question ---------- */
.question {
  width: 100%;
  max-width: 720px;
  display: grid;
  place-items: center;
  animation: panel-in 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.question__card {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 1rem + 2vw, 2.25rem);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}
.question__emoji { font-size: 2.5rem; line-height: 1; }
.question__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 1.2rem + 1.5vw, 2rem);
}
.question__prompt {
  font-size: clamp(1.1rem, 1rem + 1vw, 1.35rem);
  font-weight: 700;
  color: var(--text-secondary);
  text-wrap: balance;
}
.question__options {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.25rem;
}
.option-btn {
  width: 100%;
  min-height: 56px;
  padding: 0.9rem 1.1rem;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}
.option-btn:hover { transform: translateY(-2px); border-color: var(--border-accent); }
.option-btn.is-correct {
  background: color-mix(in srgb, var(--accent-emerald) 18%, var(--bg-surface));
  border-color: var(--accent-emerald);
}
.option-btn.is-wrong {
  background: color-mix(in srgb, var(--accent-rose) 14%, var(--bg-surface));
  border-color: var(--accent-rose);
}
.option-btn:disabled { cursor: default; transform: none; }

.question__feedback {
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--accent-cyan) 12%, var(--bg-surface));
  border: 1px solid color-mix(in srgb, var(--accent-cyan) 35%, transparent);
  text-wrap: balance;
}
.question__actions { display: flex; justify-content: center; }

/* ---------- Small screens ---------- */
@media (max-width: 480px) {
  .panel__frame { aspect-ratio: 1 / 1; }
  .story__controls { grid-template-columns: 1fr 1fr; grid-template-areas: "dots dots" "prev next"; }
  .dots { grid-area: dots; }
  #prevBtn { grid-area: prev; }
  #nextBtn { grid-area: next; }
  .nav-btn { width: 100%; }
}

@media (pointer: coarse) {
  button, sl-button, .option-btn, .icon-btn { min-height: 44px; min-width: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}