/* === Ultrasound Tongue DB v3 — Design System === */
:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #5a5a72;
  --text-muted: #999aab;
  --border: #e2e4ea;
  --accent: #0d6e6e;
  --accent-light: #e0f5f5;
  --danger: #dc3545;
  --warning: #e6a817;
  --radius: 8px;
  --max-width: 1300px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', 'Noto Sans JP', 'Noto Sans SC', -apple-system, 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
  min-height: 100vh;
}

/* ====== Header ====== */
.header {
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  max-width: var(--max-width); margin: 0 auto;
  padding: 0 24px; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}
.header-left { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.badge-count {
  padding: 2px 10px; border-radius: 9999px;
  font-size: 0.75rem; font-weight: 600;
  background: var(--accent-light); color: var(--accent);
}
.header-right { display: flex; align-items: center; gap: 4px; }

/* Language Switcher */
.lang-switcher {
  display: flex; gap: 1px;
  border: 1px solid var(--border); border-radius: 6px;
  overflow: hidden; margin-right: 8px;
}
.lang-btn {
  padding: 5px 10px; font-size: 0.72rem; font-weight: 500;
  cursor: pointer; border: none; background: var(--surface);
  color: var(--text-muted); font-family: inherit;
  transition: all 0.15s;
}
.lang-btn:hover { background: var(--bg); color: var(--text); }
.lang-btn.active {
  background: var(--accent); color: white;
}

.btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 7px 16px; border-radius: 6px;
  font-size: 0.82rem; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font-family: inherit;
  transition: all 0.15s;
}
.btn:hover { background: #f0f1f4; border-color: #ccc; }
.btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.btn-primary:hover { background: #0b5c5c; }
.btn-sm { padding: 4px 10px; font-size: 0.75rem; }
.btn-icon { padding: 6px 10px; font-size: 0.85rem; border: none; background: transparent; }
.btn-icon:hover { background: var(--bg); }
.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #fff0f0; }
.btn.active { background: var(--accent); color: white; border-color: var(--accent); }

/* ====== Search Bar ====== */
.search-bar {
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.search-input {
  width: 100%; padding: 10px 16px; border-radius: var(--radius);
  border: 1px solid var(--border); font-size: 0.9rem;
  background: var(--bg); color: var(--text); font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(13,110,110,0.1); }
.filter-chips { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.filter-chip {
  padding: 3px 10px; border-radius: 9999px; font-size: 0.72rem; font-weight: 500;
  background: var(--accent-light); color: var(--accent); cursor: pointer;
  display: flex; align-items: center; gap: 4px;
}
.filter-chip:hover { background: #c5eaea; }
.filter-chip .remove { font-weight: 700; opacity: 0.6; }

/* ====== Main ====== */
.main { max-width: var(--max-width); margin: 0 auto; padding: 16px 24px 48px; }

/* ====== Table View ====== */
.table-container { overflow-x: auto; }
.data-table {
  width: 100%; border-collapse: collapse;
  background: var(--surface); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
  font-size: 0.85rem;
}
.data-table thead { background: #f8f9fb; }
.data-table th {
  padding: 12px 20px; text-align: left; font-weight: 600;
  font-size: 0.78rem; color: var(--text-secondary);
  border-bottom: 2px solid var(--border); white-space: nowrap;
  cursor: pointer; user-select: none;
}
.data-table th:hover { color: var(--text); }
.sort-arrow { font-size: 0.65rem; }
.data-table td {
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tbody tr:hover { background: #fafbfc; }
.data-table tbody tr:last-child td { border-bottom: none; }

.col-no { width: 40px; text-align: center; color: var(--text-muted); }
.col-title { min-width: 180px; }
.col-phoneme { min-width: 100px; }
.col-ipa { min-width: 80px; font-family: 'Times New Roman', serif; }
.col-lang { width: 70px; }
.col-speaker { min-width: 100px; }
.col-date { width: 100px; }
.col-duration { width: 60px; }
.col-play { width: 50px; text-align: center; }
.col-size { width: 70px; font-size: 0.75rem; color: var(--text-muted); }
.col-actions { width: 80px; text-align: center; }

.phoneme-tag {
  display: inline-block; padding: 2px 8px; border-radius: 9999px;
  font-size: 0.75rem; font-weight: 500;
  background: var(--accent-light); color: var(--accent);
  margin: 1px 2px;
}

.play-btn {
  padding: 4px 8px; border-radius: 4px; font-size: 0.75rem;
  border: 1px solid var(--border); background: var(--bg);
  cursor: pointer; color: var(--accent); font-family: inherit;
}
.play-btn:hover { background: var(--accent-light); }

.edit-btn, .del-btn {
  padding: 3px 8px; border-radius: 4px; font-size: 0.7rem;
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; font-family: inherit; margin: 0 1px;
}
.edit-btn:hover { background: #e8f0ff; }
.del-btn:hover { background: #ffe8e8; color: var(--danger); }

.empty-row td { text-align: center; padding: 40px; color: var(--text-muted); }

/* ====== Pagination ====== */
.pagination {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 16px 0; border-top: 1px solid var(--border);
}
.pagination .btn-sm { font-size: 0.8rem; padding: 6px 14px; }
.row-cb { width: 16px; height: 16px; cursor: pointer; accent-color: var(--accent); }
.dl-link { display: block; padding: 4px 0; color: #0ff; text-decoration: none; font-size: 0.85rem; }
.dl-link:hover { color: #0f0; }

/* ====== Card View ====== */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}
.video-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  transition: box-shadow 0.2s; cursor: pointer;
}
.video-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.video-thumb {
  width: 100%; height: 160px; background: #1a1a2e;
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.video-thumb video { width: 100%; height: 100%; object-fit: cover; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.play-icon-overlay {
  position: absolute; font-size: 2.5rem; color: white;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
  pointer-events: none;
}
.card-info { padding: 14px; }
.card-title { font-size: 0.88rem; font-weight: 600; margin-bottom: 6px; }
.card-tags { display: flex; gap: 4px; flex-wrap: wrap; }

/* ====== Admin Panel ====== */
.admin-panel {
  max-width: var(--max-width); margin: 24px auto; padding: 0 24px;
}
.admin-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.admin-header h2 { font-size: 1.15rem; font-weight: 700; }
.admin-header-right { display: flex; align-items: center; gap: 12px; }

.storage-info {
  font-size: 0.78rem; color: var(--text-muted);
  padding: 4px 10px; border-radius: 9999px;
  background: var(--accent-light);
}

.admin-form {
  background: var(--surface); border-radius: var(--radius);
  border: 2px solid var(--accent); padding: 24px;
}
.admin-form h3 { font-size: 1rem; font-weight: 600; margin-bottom: 16px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label { font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); }

.input {
  padding: 8px 12px; border-radius: 6px; border: 1px solid var(--border);
  font-size: 0.85rem; background: var(--bg); color: var(--text);
  font-family: inherit; resize: vertical;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(13,110,110,0.1); }

.file-area { position: relative; }
.file-input-hidden { position: absolute; opacity: 0; width: 0; height: 0; }
.file-drop-zone {
  display: flex; align-items: center; justify-content: center;
  padding: 24px; border: 2px dashed var(--border); border-radius: 8px;
  cursor: pointer; font-size: 0.82rem; color: var(--text-muted);
  transition: all 0.15s;
}
.file-drop-zone:hover { border-color: var(--accent); background: var(--accent-light); }

.form-actions { display: flex; gap: 8px; margin-top: 16px; }

/* ====== Modal ====== */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.6); }
.modal-content {
  position: relative; background: var(--surface);
  border-radius: var(--radius); padding: 24px;
  max-width: 850px; width: 92%; max-height: 88vh; overflow-y: auto;
  box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}
.modal-sm { max-width: 400px; }
.modal-close {
  position: absolute; top: 12px; right: 12px;
  background: none; border: none; font-size: 1.2rem;
  cursor: pointer; color: var(--text-muted); z-index: 1;
}
.modal-close:hover { color: var(--text); }

.player-info { margin-top: 16px; }
.player-info h3 { font-size: 1rem; margin-bottom: 8px; }
.player-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.player-notes { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; }

/* ====== Responsive ====== */
@media (max-width: 768px) {
  .form-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 0 12px; }
  .header-right { flex-wrap: wrap; gap: 2px; }
  .lang-switcher { margin-right: 4px; }
  .lang-btn { padding: 4px 7px; font-size: 0.68rem; }
  .data-table { font-size: 0.78rem; }
  .data-table th, .data-table td { padding: 6px 8px; }
  .card-grid { grid-template-columns: 1fr; }
}