/* ベース（YouTube風ダークテーマ） */
:root {
  --bg: #0f0f0f;
  --bg-elev: #1f1f1f;
  --fg: #f1f1f1;
  --muted: #aaa;
  --accent: #f1f1f1;
  --max-width: 1280px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Roboto", "Helvetica Neue", "Hiragino Sans", "Yu Gothic UI",
    system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

/* ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #272727;
}
.site-logo { font-weight: 700; font-size: 18px; }
.site-nav { display: flex; gap: 16px; }
.nav-link {
  font-size: 14px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: #272727; color: var(--fg); }

/* ホーム（グリッド） */
.home {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 64px;
}
.cat-section + .cat-section { margin-top: 36px; }
.cat-title {
  margin: 0 4px 16px;
  font-size: 18px;
  font-weight: 600;
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px 16px;
}
.video-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.15s;
}
.video-card:hover { transform: translateY(-2px); }
.thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elev);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.thumb img {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}
.thumb-placeholder {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  font-size: 48px; color: #555;
}
.card-body { padding: 0 4px; }
.card-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

/* プレイヤーページ */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px 64px;
}
.player-wrap {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 16 / 9;
}
media-player {
  width: 100%;
  height: 100%;
  --media-border-radius: 12px;
}

/* ---- Vidstack 設定メニューのカスタマイズ ---- */
.vds-accessibility-menu,
.vds-audio-menu { display: none !important; }
.vds-playback-menu .vds-menu-items > .vds-menu-section:first-child { display: none !important; }
.vds-playback-menu .vds-menu-close-icon { display: none !important; }

@media (max-width: 768px), (pointer: coarse) {
  .vds-volume { display: none !important; }
}

/* エラー表示 */
.error {
  max-width: var(--max-width);
  margin: 40px auto;
  padding: 24px;
  text-align: center;
  color: var(--muted);
}

/* ログイン画面 */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-box {
  width: min(360px, 90vw);
  padding: 32px 24px;
  background: var(--bg-elev);
  border-radius: 16px;
  text-align: center;
}
.login-title {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
}
.login-sub {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 13px;
}
.login-input {
  display: block;
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  background: #0f0f0f;
  color: var(--fg);
  border: 1px solid #3a3a3a;
  border-radius: 8px;
  outline: none;
}
.login-input:focus { border-color: #8a8a8a; }
.login-btn {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  background: var(--fg);
  color: #0f0f0f;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.login-btn:hover { opacity: 0.85; }
.login-error {
  margin: 12px 0 0;
  color: #f88;
  font-size: 13px;
}

/* FOUC対策 */
:not(:defined) { opacity: 0; }

/* モバイル: 余白を詰める */
@media (max-width: 768px) {
  .home { padding: 12px; }
  .page { padding: 8px; }
  .player-wrap { border-radius: 0; }
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 10px;
  }
  .card-title { font-size: 14px; }
  .cat-title { font-size: 16px; }
}