/* ═══════════════════════════════════════════
   Kava Session — Tongan Song Library
   Pacific Songbook aesthetic: warm, organic,
   tapa-inspired with golden amber accents
   ═══════════════════════════════════════════ */

/* ─── Custom Properties ─── */
:root {
  --color-bg: #FDF6EC;
  --color-bg-warm: #F8EDD8;
  --color-bg-card: #FFFBF5;
  --color-text: #3B2314;
  --color-text-soft: #6B4C3A;
  --color-text-muted: #9A7B68;
  --color-accent: #C8860A;
  --color-accent-warm: #D4960F;
  --color-accent-light: #F5DFA8;
  --color-accent-faint: #FBF0D4;
  --color-terracotta: #B85C38;
  --color-border: #E8D5BE;
  --color-border-light: #F0E4D4;
  --color-shadow: rgba(59, 35, 20, 0.08);
  --color-shadow-hover: rgba(59, 35, 20, 0.14);
  --color-chorus-bg: #FEF8EC;
  --color-chorus-border: #D4960F;

  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-lyrics: 'Crimson Pro', 'Georgia', serif;
  --font-ui: 'DM Sans', system-ui, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  --max-width: 640px;
  --header-height: 0px; /* no fixed header */
}

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

/* Subtle tapa-inspired background texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.03;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 40px,
      var(--color-text) 40px,
      var(--color-text) 41px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      var(--color-text) 40px,
      var(--color-text) 41px
    );
}

/* ─── Views ─── */
.view {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.view[hidden] {
  display: none;
}

/* ═══ HEADER ═══ */
.site-header {
  text-align: center;
  padding: var(--space-2xl) 0 var(--space-lg);
  position: relative;
}

.header-decoration {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: 0 auto var(--space-lg);
  border-radius: 2px;
}

.site-title {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
  line-height: 1.1;
}

.site-subtitle {
  font-family: var(--font-lyrics);
  font-size: 1.05rem;
  font-weight: 300;
  font-style: italic;
  color: var(--color-text-soft);
  margin-top: var(--space-xs);
  letter-spacing: 0.02em;
}

/* ═══ SEARCH ═══ */
.search-container {
  padding-bottom: var(--space-md);
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  pointer-events: none;
  transition: color 0.2s;
}

.search-box:focus-within .search-icon {
  color: var(--color-accent);
}

#search-input {
  width: 100%;
  padding: 0.85rem 2.8rem 0.85rem 3rem;
  font-family: var(--font-ui);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#search-input::placeholder {
  color: var(--color-text-muted);
  font-weight: 400;
}

#search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-faint);
}

.search-clear {
  position: absolute;
  right: var(--space-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  border-radius: 50%;
  transition: color 0.15s, background 0.15s;
}

.search-clear svg {
  width: 16px;
  height: 16px;
}

.search-clear:hover {
  color: var(--color-text);
  background: var(--color-border-light);
}

/* ═══ FILTER BAR ═══ */
.filter-bar {
  display: flex;
  gap: var(--space-sm);
  padding-bottom: var(--space-lg);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  flex-shrink: 0;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 0.9rem;
  border: 1.5px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-bg-card);
  color: var(--color-text-soft);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.filter-pill:hover {
  border-color: var(--color-accent-light);
  color: var(--color-text);
}

.filter-pill.active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

.pill-count {
  font-weight: 400;
  opacity: 0.7;
  margin-left: 0.15em;
}

.pill-count::before { content: '('; }
.pill-count::after { content: ')'; }

/* ═══ SONG LIST ═══ */
.song-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-bottom: var(--space-2xl);
}

/* ─── Song Card ─── */
.song-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  position: relative;
}

.song-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--color-accent);
  border-radius: 0 2px 2px 0;
  transition: height 0.2s;
}

.song-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--color-shadow);
  border-color: var(--color-border);
}

.song-card:hover::before {
  height: 60%;
}

.song-card:active {
  transform: translateY(0);
}

.song-card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.song-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.song-card-author {
  color: var(--color-text-soft);
}

.song-card-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
}

.song-card-collection {
  font-weight: 500;
  color: var(--color-accent);
}

/* ═══ NO RESULTS ═══ */
.no-results {
  text-align: center;
  padding: var(--space-2xl) 0;
}

.no-results[hidden] {
  display: none;
}

.no-results-icon {
  font-size: 2.5rem;
  opacity: 0.3;
  margin-bottom: var(--space-sm);
}

.no-results-text {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-soft);
}

.no-results-hint {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ═══ SONG DETAIL ═══ */
.detail-nav {
  padding: var(--space-lg) 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s;
}

.back-link svg {
  width: 18px;
  height: 18px;
  transition: transform 0.15s;
}

.back-link:hover {
  color: var(--color-terracotta);
}

.back-link:hover svg {
  transform: translateX(-3px);
}

/* ─── Detail Layout ─── */
.song-detail {
  padding-bottom: var(--space-2xl);
}

.song-detail-header {
  margin-bottom: var(--space-xl);
}

.song-detail-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.song-detail-divider {
  width: 50px;
  height: 2.5px;
  background: var(--color-accent);
  border-radius: 2px;
  margin: var(--space-md) 0;
}

/* ─── Metadata ─── */
.song-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
}

.song-meta-row {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  color: var(--color-text-soft);
  line-height: 1.5;
}

.song-meta-label {
  font-weight: 600;
  color: var(--color-text);
  margin-right: 0.3em;
}

/* ─── Lyrics ─── */
.song-lyrics {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.verse {
  /* default verse styling */
}

.verse-label {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.verse-lines {
  font-family: var(--font-lyrics);
  font-size: 1.08rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--color-text);
}

.verse-lines .line {
  display: block;
}

/* ─── Chorus ─── */
.chorus {
  background: var(--color-chorus-bg);
  border-left: 3px solid var(--color-chorus-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-md) var(--space-lg);
  position: relative;
}

.chorus-label {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.chorus-label::before {
  content: '\266A';
  font-size: 0.9rem;
}

.chorus .verse-lines {
  font-style: italic;
  font-weight: 300;
}

/* ─── Notes ─── */
.song-notes {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-warm);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.song-notes-label {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.song-notes-text {
  font-family: var(--font-lyrics);
  font-size: 0.95rem;
  font-style: italic;
  line-height: 1.65;
  color: var(--color-text-soft);
}

/* ═══ LOADING STATE ═══ */
.loading {
  text-align: center;
  padding: var(--space-2xl) 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.loading-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-bottom: var(--space-sm);
}

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

/* ═══ VIEW TRANSITIONS ═══ */
.view-enter {
  animation: fadeSlideIn 0.25s ease-out;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ═══ RESPONSIVE ═══ */

/* Slightly larger screens */
@media (min-width: 480px) {
  .site-title {
    font-size: 3rem;
  }

  .song-detail-title {
    font-size: 2.3rem;
  }

  .verse-lines {
    font-size: 1.12rem;
  }
}

/* Tablet+ */
@media (min-width: 768px) {
  .view {
    padding: 0 var(--space-xl);
  }

  .site-header {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  .song-card {
    padding: var(--space-lg) var(--space-xl);
  }

  .song-card-title {
    font-size: 1.2rem;
  }
}

/* ═══ ACCESSIBILITY ═══ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus-visible for keyboard users */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar {
  width: 6px;
}

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

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

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}