/* ===== リセット・ベース ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary:    #f2f2f2;
  --bg-white:      #ffffff;
  --bg-card:       #ffffff;
  --accent-orange: #ff6600;
  --accent-yellow: #FBBF24;
  --accent-blue:   #0EA5E9;
  --accent-dark:   #1a1a1a;
  --text-primary:  #1a1a1a;
  --text-muted:    #666666;
  --border:        #e0e0e0;
  --shadow:        0 2px 12px rgba(0,0,0,0.08);
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.7;
}

/* ===== 弾幕レイヤー ===== */
#danmaku-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.danmaku-comment {
  position: absolute;
  white-space: nowrap;
  font-size: 1rem;
  font-weight: 700;
  animation: danmaku-flow linear forwards;
  opacity: 0.15;
  user-select: none;
}

@keyframes danmaku-flow {
  from { transform: translateX(110vw); }
  to   { transform: translateX(-110vw); }
}

@media (prefers-reduced-motion: reduce) {
  .danmaku-comment { animation: none; opacity: 0; }
  .loading-bar-inner { animation: none; width: 45%; }
  .seekbar-progress { animation: none; width: 30%; }
}

/* ===== ヘッダー ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.7rem 2rem;
  background: #ffffff;
  border-bottom: 3px solid var(--accent-orange);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.logo-wrap {
  display: flex;
  align-items: center;
}

.header-logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.header-nav {
  display: flex;
  gap: 1rem;
}

.nav-item {
  font-size: 0.85rem;
  padding: 0.25rem 0.7rem;
  border-radius: 99px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}

.nav-item.active {
  background: var(--accent-orange);
  color: #fff;
  font-weight: 700;
}

.nav-item.disabled {
  opacity: 0.4;
  cursor: default;
}

/* ===== メイン ===== */
.main-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

/* ===== プレイヤーコンテナ ===== */
.player-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* 上部バー */
.player-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 1rem;
  background: var(--accent-dark);
}

.player-title {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-controls {
  display: flex;
  gap: 0.35rem;
  flex-shrink: 0;
}

.ctrl-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

.ctrl-dot.active {
  background: var(--accent-orange);
  box-shadow: 0 0 6px var(--accent-orange);
}

/* スクリーン */
.player-screen {
  padding: 3.5rem 2rem;
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255,102,0,0.04) 0%, transparent 60%),
    var(--bg-card);
}

.kinen-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.3rem 1.1rem;
  border-radius: 99px;
  margin-bottom: 2rem;
  letter-spacing: 0.06em;
  box-shadow: 0 2px 8px rgba(249,115,22,0.3);
}

.main-title {
  font-family: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;
  font-size: clamp(2.8rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent-dark);
  margin-bottom: 1rem;
}

.accent {
  color: var(--accent-orange);
}

.sub-title {
  display: block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(1.1rem, 3.5vw, 1.8rem);
  color: var(--accent-blue);
  letter-spacing: 0.25em;
  font-weight: 700;
  margin-top: 0.4rem;
}

.message {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 1.5rem auto;
  max-width: 420px;
  line-height: 1.9;
}

/* ローディングバー */
.loading-bar {
  width: 240px;
  height: 5px;
  background: var(--border);
  border-radius: 99px;
  margin: 1.5rem auto 0.6rem;
  overflow: hidden;
}

.loading-bar-inner {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-yellow));
  border-radius: 99px;
  animation: loading-pulse 2s ease-in-out infinite alternate;
}

@keyframes loading-pulse {
  from { width: 15%; opacity: 0.7; }
  to   { width: 70%; opacity: 1; }
}

.loading-label {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  font-weight: 500;
}

/* 下部バー */
.player-bottombar {
  padding: 0.6rem 1rem;
  background: #f2f2f2;
  border-top: 1px solid var(--border);
}

.seekbar {
  width: 100%;
  height: 4px;
  background: #d0d0d0;
  border-radius: 99px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.seekbar-progress {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-yellow));
  border-radius: 99px;
  animation: seekbar-grow 8s linear infinite;
}

@keyframes seekbar-grow {
  from { width: 0%; }
  to   { width: 100%; }
}

.player-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===== 情報カード ===== */
.info-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.info-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: default;
  transition: border-color 0.2s ease-out, transform 0.2s ease-out, box-shadow 0.2s ease-out;
  box-shadow: var(--shadow);
}

.info-card:hover {
  border-color: var(--accent-orange);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(249,115,22,0.12);
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.card-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.card-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-blue);
}

/* ===== SNSフォロー ===== */
.follow-section {
  text-align: center;
  padding: 1rem 0;
}

.follow-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.follow-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.follow-btn {
  display: inline-block;
  padding: 0.65rem 1.8rem;
  border-radius: 99px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.2s ease-out, transform 0.15s ease-out;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.follow-btn:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

.follow-btn:focus-visible {
  outline: 3px solid var(--accent-blue);
  outline-offset: 3px;
}

.follow-btn.twitter {
  background: #000;
  color: #fff;
}

.follow-btn.niconico {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-yellow));
  color: #fff;
}

/* ===== フッター ===== */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  background: #f2f2f2;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.footer-sub {
  font-size: 0.7rem;
  color: #999999;
}

/* ===== レスポンシブ ===== */
@media (max-width: 600px) {
  .info-cards {
    grid-template-columns: 1fr;
  }

  .player-screen {
    padding: 2.5rem 1rem;
  }

  .site-header {
    padding: 0.6rem 1rem;
    gap: 1rem;
  }

  .header-nav {
    gap: 0.5rem;
  }
}