:root {
  --bg: #fff8fb;
  --bg2: #ffffff;
  --bg3: #fdf2f8;
  --border: rgba(244,114,182,0.18);
  --accent: #ec4899;
  --accent2: #db2777;
  --pink: #f472b6;
  --gold: #f59e0b;
  --text: #3d1f2e;
  --muted: #9d7a8a;
  --success: #10b981;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(244,114,182,0.12);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(160deg, #fce7f3 0%, #fff8fb 40%, #fdf4ff 100%);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* Navbar */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,248,251,0.5);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 60px;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-size: 1.2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 8px; }
.nav-link {
  padding: 6px 16px; border-radius: 20px;
  color: var(--muted); font-size: 0.9rem; transition: all 0.2s;
  background: none; border: none; cursor: pointer; font-family: inherit;
}
.nav-link:hover, .nav-link.active {
  background: rgba(236,72,153,0.1); color: var(--accent);
}

/* Main */
.main { padding-top: 80px; padding-bottom: 60px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Page header */
.page-header { margin-bottom: 32px; }
.page-header h1 {
  font-size: 2rem; font-weight: 800; margin-bottom: 6px;
  background: linear-gradient(135deg, var(--accent2), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.page-header p { color: var(--muted); }

/* Controls */
.controls { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; align-items: center; }
.search-input {
  flex: 1; min-width: 200px; padding: 10px 16px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.95rem; outline: none;
  transition: border-color 0.2s;
}
.search-input:focus { border-color: var(--accent); }
.search-input::placeholder { color: var(--muted); }

.genre-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.genre-tab {
  padding: 6px 14px; border-radius: 20px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); font-size: 0.85rem;
  cursor: pointer; transition: all 0.2s;
}
.genre-tab:hover { border-color: var(--accent); color: var(--accent); }
.genre-tab.active { background: linear-gradient(135deg, var(--accent), var(--pink)); border-color: transparent; color: #fff; }

.sort-select {
  padding: 8px 14px; background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.9rem; cursor: pointer; outline: none;
}
.sort-select option { background: var(--bg2); }

/* Song grid */
.songs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

/* Song card */
.song-card {
  background: var(--bg2); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  cursor: pointer; transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  box-shadow: 0 2px 8px rgba(244,114,182,0.06);
}
.song-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow);
  border-color: rgba(236,72,153,0.3);
}
.card-cover {
  width: 100%; aspect-ratio: 1;
  position: relative; display: flex; align-items: flex-end;
}
.card-genre-badge {
  position: absolute; top: 10px; right: 10px;
  background: rgba(255,255,255,0.75); backdrop-filter: blur(4px);
  padding: 3px 10px; border-radius: 12px; font-size: 0.75rem; color: var(--accent2);
  font-weight: 600;
}
.card-cover-icon {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 3.5rem; opacity: 0.4;
}
.card-body { padding: 14px; }
.card-title { font-size: 1rem; font-weight: 600; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text); }
.card-artist { color: var(--muted); font-size: 0.85rem; margin-bottom: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-rating { display: flex; align-items: center; gap: 8px; }
.rating-num { font-size: 0.85rem; color: var(--muted); }

/* Stars */
.stars { display: inline-flex; gap: 2px; }
.stars-sm .star { font-size: 0.85rem; }
.stars-md .star { font-size: 1rem; }
.stars-lg .star { font-size: 1.5rem; }
.stars-xl .star { font-size: 2rem; cursor: pointer; transition: transform 0.1s; }
.stars-xl .star:hover { transform: scale(1.2); }
.star.filled { color: var(--gold); }
.star.half { color: var(--gold); opacity: 0.6; }
.star.empty { color: #e9c4d4; }

/* Empty state */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: 80px 20px; gap: 12px; color: var(--muted);
}
.empty-icon { font-size: 3rem; }

/* Upload form */
.form-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; max-width: 640px; margin: 0 auto;
  box-shadow: 0 2px 16px rgba(244,114,182,0.08);
}
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.9rem; color: var(--muted); margin-bottom: 6px; }
.form-label span { color: var(--accent); }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.95rem; outline: none;
  transition: border-color 0.2s; font-family: inherit;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--accent); }
.form-select option { background: var(--bg2); }
.form-textarea { resize: vertical; min-height: 90px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.cover-upload {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 32px; text-align: center; cursor: pointer;
  transition: border-color 0.2s, background 0.2s; position: relative;
}
.cover-upload:hover, .cover-upload.drag-over {
  border-color: var(--accent); background: rgba(236,72,153,0.04);
}
.cover-upload input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.cover-preview {
  width: 120px; height: 120px; border-radius: 8px;
  object-fit: cover; margin: 0 auto 12px; display: block;
}
.cover-upload-text { color: var(--muted); font-size: 0.9rem; }
.cover-upload-text strong { color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 24px; border-radius: 8px; font-size: 0.95rem;
  font-weight: 600; cursor: pointer; border: none; transition: all 0.2s;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--pink)); color: #fff; }
.btn-primary:hover { background: linear-gradient(135deg, var(--accent2), var(--accent)); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(236,72,153,0.3); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--accent); }
.btn-outline:hover { border-color: var(--accent); background: rgba(236,72,153,0.06); }
.btn-full { width: 100%; }

.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 20px;
  box-shadow: var(--shadow); font-size: 0.9rem;
  transform: translateY(80px); opacity: 0;
  transition: all 0.3s; pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error { border-color: #ef4444; color: #ef4444; }

/* Song detail */
.song-hero {
  display: flex; gap: 32px; align-items: flex-start;
  background: linear-gradient(135deg, #fff0f7, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; margin-bottom: 24px;
  box-shadow: 0 2px 16px rgba(244,114,182,0.08);
}
.hero-cover {
  width: 180px; height: 180px; border-radius: 12px;
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  font-size: 4rem; overflow: hidden;
}
.hero-cover img { width: 100%; height: 100%; object-fit: cover; }
.hero-info { flex: 1; min-width: 0; }
.hero-genre { display: inline-block; padding: 3px 12px; border-radius: 12px; font-size: 0.8rem; margin-bottom: 10px; }
.hero-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 4px; color: var(--text); }
.hero-artist { color: var(--muted); font-size: 1.1rem; margin-bottom: 4px; }
.hero-meta { color: var(--muted); font-size: 0.85rem; margin-bottom: 4px; }
.hero-desc { color: var(--muted); font-size: 0.95rem; line-height: 1.7; }

.rating-section {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(244,114,182,0.06);
}
.rating-section h2 { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.rating-overview { display: flex; gap: 32px; align-items: center; margin-bottom: 24px; }
.rating-big { text-align: center; }
.rating-big .num { font-size: 3.5rem; font-weight: 800; color: var(--gold); line-height: 1; }
.rating-big .count { color: var(--muted); font-size: 0.85rem; margin-top: 4px; }
.rating-dist { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.dist-row { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; }
.dist-bar-wrap { flex: 1; height: 6px; background: #fce7f3; border-radius: 3px; overflow: hidden; }
.dist-bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--pink)); border-radius: 3px; transition: width 0.5s; }
.dist-label { color: var(--muted); width: 20px; text-align: right; }
.dist-count { color: var(--muted); width: 24px; }

.user-rating { border-top: 1px solid var(--border); padding-top: 20px; }
.user-rating p { color: var(--muted); margin-bottom: 12px; font-size: 0.9rem; }
.interactive-stars { display: flex; gap: 6px; }
.interactive-stars .star {
  font-size: 2.2rem; cursor: pointer; color: #e9c4d4;
  transition: color 0.15s, transform 0.1s;
}
.interactive-stars .star:hover,
.interactive-stars .star.active { color: var(--gold); }
.interactive-stars .star:hover { transform: scale(1.15); }
.rating-feedback { margin-top: 10px; font-size: 0.9rem; color: var(--success); min-height: 22px; }

.back-btn { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 0.9rem; margin-bottom: 20px; transition: color 0.2s; }
.back-btn:hover { color: var(--accent); }

@media (max-width: 640px) {
  .song-hero { flex-direction: column; }
  .hero-cover { width: 100%; height: 200px; }
  .form-row { grid-template-columns: 1fr; }
  .rating-overview { flex-direction: column; gap: 16px; }
  .page-header h1 { font-size: 1.5rem; }
}

/* Nav user area */
.nav-user { display: flex; align-items: center; gap: 8px; }
.nav-user-btn { display: flex; align-items: center; gap: 8px; padding: 4px 12px; border-radius: 20px; transition: background 0.2s; }
.nav-user-btn:hover { background: rgba(236,72,153,0.1); }
.nav-avatar-sm { width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--pink)); display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: 700; color: #fff; flex-shrink: 0; }

/* Homepage hero */
.home-hero { padding: 60px 24px 40px; text-align: center; }
.home-hero h1 {
  font-size: 2.8rem; font-weight: 900; margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent2), var(--pink), #fbcfe8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.home-hero p { color: var(--muted); margin-bottom: 28px; }
.home-search-wrap { max-width: 100%; display: flex; gap: 0; }
.home-search-input { flex: 1; padding: 14px 20px; background: var(--bg2); border: 1px solid var(--border); border-right: none; border-radius: 10px 0 0 10px; color: var(--text); font-size: 1rem; outline: none; transition: border-color 0.2s; }
.home-search-input:focus { border-color: var(--accent); }
.home-search-input::placeholder { color: var(--muted); }
.home-search-btn { padding: 14px 24px; background: linear-gradient(135deg, var(--accent), var(--pink)); border: none; border-radius: 0 10px 10px 0; color: #fff; font-size: 1rem; cursor: pointer; transition: opacity 0.2s; }
.home-search-btn:hover { opacity: 0.88; }

/* Section titles */
.section-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; color: var(--text); }

/* Comments */
.comments-section { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; box-shadow: 0 2px 8px rgba(244,114,182,0.06); }
.comment-form { display: flex; gap: 10px; margin-bottom: 20px; }
.comment-input { flex: 1; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 0.9rem; outline: none; font-family: inherit; resize: none; }
.comment-input:focus { border-color: var(--accent); }
.comment-list { display: flex; flex-direction: column; gap: 14px; }
.comment-item { display: flex; gap: 12px; }
.comment-avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--pink)); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 700; color: #fff; flex-shrink: 0; }
.comment-body { flex: 1; }
.comment-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.comment-username { font-size: 0.85rem; font-weight: 600; color: var(--accent); }
.comment-date { font-size: 0.75rem; color: var(--muted); }
.comment-text { font-size: 0.9rem; color: var(--text); line-height: 1.5; }
.comment-del { font-size: 0.75rem; color: var(--muted); cursor: pointer; margin-left: auto; }
.comment-del:hover { color: #ef4444; }
.login-prompt { color: var(--muted); font-size: 0.9rem; padding: 12px 0; }
.login-prompt a { color: var(--accent); }

/* Auth page */
.auth-wrap { min-height: calc(100vh - 60px); display: flex; align-items: center; justify-content: center; padding: 24px; background: linear-gradient(160deg, #fff0f7 0%, #fff8fb 100%); }
.auth-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; width: 100%; max-width: 400px; box-shadow: 0 8px 32px rgba(244,114,182,0.12); }
.auth-tabs { display: flex; gap: 0; margin-bottom: 28px; border-bottom: 1px solid var(--border); }
.auth-tab { flex: 1; padding: 10px; text-align: center; cursor: pointer; color: var(--muted); font-size: 0.95rem; border-bottom: 2px solid transparent; margin-bottom: -1px; transition: all 0.2s; }
.auth-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.auth-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 6px; background: linear-gradient(135deg, var(--accent2), var(--pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.auth-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }

/* Profile page */
.profile-header { background: linear-gradient(135deg, #fff0f7, #ffffff); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; display: flex; gap: 24px; align-items: flex-start; margin-bottom: 28px; box-shadow: 0 2px 16px rgba(244,114,182,0.08); }
.profile-avatar { width: 90px; height: 90px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--pink)); display: flex; align-items: center; justify-content: center; font-size: 2.2rem; font-weight: 700; color: #fff; flex-shrink: 0; overflow: hidden; }
.profile-avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile-info { flex: 1; }
.profile-name { font-size: 1.6rem; font-weight: 800; margin-bottom: 4px; color: var(--text); }
.profile-bio { color: var(--muted); font-size: 0.95rem; margin-bottom: 8px; }
.profile-join { color: var(--muted); font-size: 0.8rem; }
.profile-edit-form { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }

/* Random users grid */
.users-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.user-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s; }
.user-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(236,72,153,0.3); }
.user-card-avatar { width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--pink)); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 700; color: #fff; margin: 0 auto 10px; overflow: hidden; }
.user-card-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-card-name { font-weight: 600; margin-bottom: 4px; color: var(--text); }
.user-card-bio { color: var(--muted); font-size: 0.8rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Song card comment count */
.card-comments { font-size: 0.8rem; color: var(--muted); margin-top: 4px; }

/* Song card download button */
.card-download {
  display: flex; align-items: center; gap: 6px;
  margin-top: 10px; padding: 6px 12px;
  background: rgba(236,72,153,0.06); border: 1px solid var(--border);
  border-radius: 6px; font-size: 0.8rem; color: var(--accent);
  transition: all 0.2s;
}
.card-download:hover {
  background: rgba(236,72,153,0.14); border-color: var(--accent);
}

/* Pagination */
.pagination {
  display: flex; justify-content: center; align-items: center; gap: 6px;
  margin-top: 28px; flex-wrap: wrap;
}
.pag-btn {
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg2); color: var(--text); font-size: 0.85rem;
  cursor: pointer; transition: all 0.2s;
}
.pag-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pag-btn.active { background: linear-gradient(135deg, var(--accent), var(--pink)); border-color: transparent; color: #fff; }
.pag-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Delete song button */
.btn-delete-song {
  margin-top: 8px; padding: 4px 10px; border-radius: 6px;
  border: 1px solid #fca5a5; background: rgba(239,68,68,0.06);
  color: #ef4444; font-size: 0.75rem; cursor: pointer; transition: all 0.2s;
}
.btn-delete-song:hover { background: rgba(239,68,68,0.15); border-color: #ef4444; }