/* ============================================================
   VIETGUITAR — Search / Hop-Am Page  (app.css)
   Design System: Guitar Wood Palette · VietGuitar Brand 2026 · Mobile-First · Dark Mode
   ============================================================ */

/* === DESIGN TOKENS === */
:root {
  /* === VietGuitar Brand Colors (Stilguide-vietguitar-2026.png) === */
  --brand-red:       #E94B55;
  --brand-red-dark:  #C73E47;
  --brand-red-light: #FDECEA;
  --brand-charcoal:  #202124;
  --brand-gold:      #D9A441;
  --brand-warm:      #FAFAF8;
  --brand-gray:      #E5E7EB;

  /* === Font Stack === */
  --font-brand:     'Manrope', 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-body:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-editorial: 'Playfair Display', Georgia, serif;

  /* === Wood Palette (UI nền, card) === */
  --wood-950:  hsl(25, 55%, 12%);
  --wood-900:  hsl(25, 55%, 18%);
  --wood-800:  hsl(27, 52%, 24%);
  --wood-700:  hsl(27, 50%, 32%);
  --wood-600:  hsl(29, 47%, 38%);
  --wood-500:  hsl(30, 45%, 46%);
  --wood-400:  hsl(32, 42%, 58%);
  --wood-300:  hsl(33, 40%, 70%);
  --wood-200:  hsl(36, 38%, 82%);
  --wood-100:  hsl(38, 45%, 91%);
  --cream-50:  hsl(42, 60%, 97%);
  --cream-100: hsl(42, 50%, 94%);
  --cream-200: hsl(40, 40%, 88%);
  --amber-400: hsl(36, 96%, 53%);
  --amber-500: hsl(32, 91%, 46%);
  --amber-600: hsl(28, 88%, 40%);

  --bg:        var(--cream-50);
  --surface:   #ffffff;
  --surface-2: var(--cream-100);
  --border:    var(--cream-200);
  --foreground: hsl(25, 40%, 12%);
  --muted:     hsl(25, 18%, 48%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.05);

  --transition: 200ms cubic-bezier(.4,0,.2,1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        hsl(25, 22%, 9%);
    --surface:   hsl(25, 20%, 14%);
    --surface-2: hsl(25, 18%, 18%);
    --border:    hsl(25, 20%, 24%);
    --foreground: hsl(38, 35%, 88%);
    --muted:     hsl(30, 18%, 55%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,.4);
    --shadow-lg: 0 10px 30px rgba(0,0,0,.5);
  }
}

body.dark-mode {
  --bg:        hsl(25, 22%, 9%);
  --surface:   hsl(25, 20%, 14%);
  --surface-2: hsl(25, 18%, 18%);
  --border:    hsl(25, 20%, 24%);
  --foreground: hsl(38, 35%, 88%);
  --muted:     hsl(30, 18%, 55%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,.4);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.5);
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--foreground);
  line-height: 1.6;
  min-height: 100dvh;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
.wrap { max-width: 1100px; margin-inline: auto; padding-inline: 16px; }

/* === FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@700;800&display=swap');

/* ============================================================
   HEADER (đồng nhất toàn site — STYLE_GUIDE_2026)
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 12px;
}

.site-logo-img { height: 38px; width: auto; display: block; object-fit: contain; }
.logo-dark { display: none !important; }
body.dark-mode .logo-light { display: none !important; }
body.dark-mode .logo-dark { display: block !important; }
@media (prefers-color-scheme: dark) {
  body:not(.light-mode) .logo-light { display: none; }
  body:not(.light-mode) .logo-dark { display: block; }
}

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }

.site-nav { display: flex; align-items: center; gap: 2px; }
.site-nav a {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-700, #4a3424);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.site-nav a:hover { background: var(--surface-2); color: var(--wood-700); }
.site-nav a.active { background: var(--wood-100); color: var(--wood-700); }
body.dark-mode .site-nav a.active { background: var(--surface-2); color: var(--wood-300); }

.header-actions { display: flex; align-items: center; gap: 6px; }
.search-trigger-btn, .dm-toggle, .menu-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
  transition: background var(--transition), color var(--transition);
}
.search-trigger-btn:hover, .dm-toggle:hover, .menu-toggle:hover { background: var(--surface-2); color: var(--wood-700); }
.search-trigger-btn svg, .dm-toggle svg, .menu-toggle svg { display: block; }
.dm-toggle .icon-sun { display: none; }
body.dark-mode .dm-toggle .icon-sun { display: block; }
body.dark-mode .dm-toggle .icon-moon { display: none; }

@media (max-width: 768px) {
  .site-nav { display: none; }
  .menu-toggle { display: flex; }
}
@media (min-width: 769px) {
  .menu-toggle { display: none; }
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  padding: 8px 0;
  background: var(--surface);
}
.mobile-nav.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  z-index: 99;
  box-shadow: var(--shadow-md);
}
.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--foreground);
  text-decoration: none;
  border-radius: 0;
  transition: background var(--transition);
}
.mobile-nav a:hover { background: var(--surface-2); }

/* ============================================================
   SEARCH AREA — hero strip
   ============================================================ */
.search-area {
  background-image: url('/assets/images/hero-hop-am-desktop.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 48px 16px 40px; /* Increased padding for hero feel */
  color: #fff;
  position: relative;
  overflow: hidden;
}

@media (max-width: 768px) {
  .search-area {
    background-image: url('/assets/images/hero-hop-am-mobile.jpg');
    padding: 36px 16px 32px;
  }
}

/* Dark overlay for readability */
.search-area::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55); /* Dark overlay */
  pointer-events: none;
}

.search-area .container {
  max-width: 600px;
  margin-inline: auto;
  padding: 0 0;
  position: relative;
}

.search-area h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(18px, 4vw, 24px);
  font-weight: 700;
  text-align: center;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: -0.3px;
}

.search-area .search-subtitle {
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* Search input group */
#searchForm { width: 100%; }

.search-input-group {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: var(--radius-full);
  padding: 6px 6px 6px 16px;
  gap: 8px;
  box-shadow: 0 8px 28px rgba(0,0,0,.28), 0 2px 8px rgba(0,0,0,.12);
}

.search-input-group .search-icon {
  flex-shrink: 0;
  color: var(--wood-500);
  display: flex;
  align-items: center;
}

.search-input-group .form-control {
  flex: 1;
  border: none;
  outline: none;
  box-shadow: none;
  background: transparent;
  font-size: 16px;
  font-family: 'Inter', sans-serif;
  color: hsl(25,40%,12%);
  padding: 6px 0;
  min-width: 0;
}

.search-input-group .form-control::placeholder { color: hsl(25,14%,60%); }

.btn-search {
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  color: #fff !important;
  font-weight: 700;
  font-size: 14px;
  padding: 0 22px;
  height: 44px;
  min-width: 80px;
  border-radius: var(--radius-full) !important;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 3px 12px rgba(180,90,0,.35);
  white-space: nowrap;
}
.btn-search:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 18px rgba(180,90,0,.5);
}
.btn-search:active { transform: translateY(0); }

/* Filter button */
.btn-filter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.88);
  border: 1px solid rgba(255,255,255,.28);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  background: rgba(255,255,255,.1);
  transition: background var(--transition);
  min-height: 38px;
}
.btn-filter:hover { background: rgba(255,255,255,.2); }

/* Advanced search panel */
.adv-search-panel {
  display: none;
  margin-top: 16px;
  background: rgba(255,255,255,.1);
  backdrop-filter: blur(8px);
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,.15);
}
.adv-search-panel .row { display: flex; gap: 10px; flex-wrap: wrap; }
.adv-search-panel .col-12 { flex: 1 1 200px; }
.adv-search-panel label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: rgba(255,255,255,.7);
  margin-bottom: 6px;
}
.adv-search-panel .form-control,
.adv-search-panel .form-select {
  width: 100%;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-md);
  color: #fff;
  padding: 9px 12px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}
.adv-search-panel .form-control:focus,
.adv-search-panel .form-select:focus {
  border-color: rgba(255,255,255,.5);
  background: rgba(255,255,255,.18);
}
.adv-search-panel .form-control::placeholder { color: rgba(255,255,255,.5); }
.adv-search-panel .form-select option { background: var(--wood-900); color: #fff; }

/* ============================================================
   ALPHABET / FILTER STRIP
   ============================================================ */
.alphabet-filter {
  margin-top: 14px;
}

.alphabet-scroll {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 2px 2px 6px;
  flex-wrap: nowrap;
}
.alphabet-scroll::-webkit-scrollbar { display: none; }

.alpha-btn {
  flex: 0 0 auto;
  min-width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,.78);
  background: rgba(255,255,255,.1);
  border: 1.5px solid rgba(255,255,255,.18);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  padding: 0 10px;
  white-space: nowrap;
}
.alpha-btn:hover {
  background: rgba(255,255,255,.22);
  color: #fff;
  border-color: rgba(255,255,255,.35);
}
.alpha-btn.active {
  background: var(--amber-400);
  color: #fff;
  border-color: var(--amber-500);
  box-shadow: 0 3px 10px rgba(180,90,0,.4);
}

/* ============================================================
   RESULTS AREA
   ============================================================ */
.results-container {
  max-width: 680px;
  margin-inline: auto;
  padding: 20px 16px 24px;
}

#result-status {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
}
#result-status b { color: var(--foreground); }
#result-status .text-primary { color: var(--amber-500); }

/* ============================================================
   SONG CARDS
   ============================================================ */
.song-card {
  display: block;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.song-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--genre-accent, var(--wood-400));
  border-radius: 0;
}

.song-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(2px);
  border-color: var(--wood-200);
}

@media (prefers-color-scheme: dark) {
  .song-card:hover { border-color: var(--border); }
}

/* Genre accent colors */
.song-card[data-genre*="pop"]    { --genre-accent: hsl(200,70%,50%); }
.song-card[data-genre*="bolero"] { --genre-accent: hsl(0,65%,55%); }
.song-card[data-genre*="rock"]   { --genre-accent: hsl(25,20%,28%); }
.song-card[data-genre*="indie"]  { --genre-accent: hsl(142,50%,42%); }
.song-card[data-genre*="trinh"]  { --genre-accent: hsl(270,50%,55%); }

.song-card-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.song-card-body { flex: 1; min-width: 0; }

.song-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--foreground);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.song-meta {
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.song-meta-artist {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
}

.song-meta-views {
  display: flex;
  align-items: center;
  gap: 4px;
}

.song-card-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

/* Genre badge */
.genre-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .3px;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: var(--surface-2);
  color: var(--muted);
  white-space: nowrap;
  text-transform: uppercase;
}

/* Heart button in card */
.card-heart {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--muted);
  transition: color var(--transition), background var(--transition);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.card-heart:hover { color: hsl(0,70%,60%); background: hsl(0,70%,95%); }
.card-heart.loved { color: hsl(0,65%,55%); }
.card-heart.loved svg { fill: currentColor; }

@media (prefers-color-scheme: dark) {
  .card-heart:hover { background: hsl(0,30%,22%); }
}

/* ============================================================
   SKELETON LOADING
   ============================================================ */
.skeleton-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 10px;
  height: 74px;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.skeleton-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--cream-200);
}

.skeleton-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,.55) 50%,
    transparent 100%
  );
  animation: shimmer 1.4s ease-in-out infinite;
}

@media (prefers-color-scheme: dark) {
  .skeleton-card::after {
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,.08) 50%, transparent 100%);
  }
}

@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-item .page-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--foreground);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  padding: 0 12px;
  transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.page-item .page-link:hover {
  background: var(--surface-2);
  border-color: var(--wood-300);
  color: var(--wood-700);
}

.page-item.active .page-link {
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  border-color: var(--amber-500);
  color: #fff;
  box-shadow: 0 3px 10px rgba(180,90,0,.3);
}

/* ============================================================
   EMPTY / ERROR STATE
   ============================================================ */
.alert-danger {
  background: hsl(0,55%,97%);
  border: 1px solid hsl(0,55%,88%);
  color: hsl(0,50%,38%);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .alert-danger {
    background: hsl(0,30%,16%);
    border-color: hsl(0,30%,28%);
    color: hsl(0,60%,75%);
  }
}