/* ============================================
   Korean Daily Phrases - Pastel Theme
   ============================================ */

:root {
  /* Backgrounds */
  --bg-page: #fffbf5;
  --bg-card: #ffffff;

  /* Text */
  --text-korean: #2d3748;
  --text-meaning: #4a5568;
  --text-pronunciation: #38b2ac;
  --text-muted: #718096;

  /* Accents */
  --accent-coral: #fb923c;
  --accent-coral-hover: #f97316;
  --accent-purple: #9f7aea;
  --accent-teal: #38b2ac;

  /* Error */
  --bg-error: #fed7d7;
  --text-error: #742a2a;
  --border-error: #fc8181;

  /* Shadows */
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 20px rgba(0, 0, 0, 0.10);

  /* Spacing / radii */
  --radius-card: 12px;
  --radius-button: 999px;

  /* Fonts */
  --font-korean: 'Noto Sans KR', system-ui, -apple-system, sans-serif;
  --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  background-color: var(--bg-page);
  color: var(--text-korean);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Layout ---------- */
#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.header-text h1 {
  font-family: var(--font-korean);
  font-size: 1.875rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--text-korean);
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.language-selector select {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background-color: var(--bg-card);
  color: var(--text-korean);
  cursor: pointer;
  min-width: 140px;
  transition: border-color 0.15s ease;
}

.language-selector select:hover {
  border-color: var(--accent-coral);
}

.language-selector select:focus {
  outline: 2px solid var(--accent-coral);
  outline-offset: 2px;
}

/* ---------- Error banner ---------- */
.error-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 1rem;
  background-color: var(--bg-error);
  color: var(--text-error);
  border: 1px solid var(--border-error);
  border-radius: var(--radius-card);
  margin-bottom: 1.5rem;
}

.error-banner[hidden] {
  display: none;
}

.retry-button {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  background-color: var(--bg-card);
  color: var(--text-error);
  border: 1px solid var(--border-error);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.retry-button:hover {
  background-color: #fff5f5;
}

/* ---------- Sentences container ---------- */
.sentences-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.category-section {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.category-title {
  font-family: var(--font-ui);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent-purple);
  margin: 0;
  padding-left: 0.25rem;
  letter-spacing: 0.01em;
}

/* ---------- Sentence card ---------- */
.sentence-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 1.25rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto;
  column-gap: 1rem;
  row-gap: 0.5rem;
  align-items: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.sentence-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.korean-text {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-korean);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-korean);
  margin: 0;
  line-height: 1.3;
}

.play-button {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  background-color: var(--accent-coral);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.play-button:hover:not(:disabled) {
  background-color: var(--accent-coral-hover);
}

.play-button:active:not(:disabled) {
  transform: scale(0.97);
}

.play-button:focus-visible {
  outline: 2px solid var(--accent-coral-hover);
  outline-offset: 2px;
}

.play-button:disabled {
  background-color: #cbd5e0;
  color: #ffffff;
  cursor: not-allowed;
}

.play-button.is-playing {
  background-color: #e53e3e;
  animation: pulse 1.2s ease-in-out infinite;
}

.play-button.is-playing:hover {
  background-color: #c53030;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(229, 62, 62, 0.5); }
  50%      { box-shadow: 0 0 0 8px rgba(229, 62, 62, 0); }
}

.meaning {
  grid-column: 1 / -1;
  grid-row: 2;
  font-size: 1rem;
  color: var(--text-meaning);
  margin: 0;
}

.pronunciation {
  grid-column: 1 / -1;
  grid-row: 3;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--accent-teal);
  margin: 0;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 3rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.site-footer p {
  margin: 0;
}

/* ---------- Accessibility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@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;
  }

  .sentence-card:hover {
    transform: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  #app {
    padding: 1.5rem 1rem 3rem;
  }

  .header-text h1 {
    font-size: 1.5rem;
  }

  .korean-text {
    font-size: 1.5rem;
  }

  .sentence-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    row-gap: 0.625rem;
  }

  .korean-text {
    grid-column: 1;
    grid-row: 1;
  }

  .play-button {
    grid-column: 1;
    grid-row: 2;
    justify-self: start;
  }

  .meaning {
    grid-column: 1;
    grid-row: 3;
  }

  .pronunciation {
    grid-column: 1;
    grid-row: 4;
  }
}