/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep:    #0d0f1a;
  --bg-panel:   #12141f;
  --bg-card:    #181b2a;
  --bg-input:   #1a1c2e;
  --border:     #252840;
  --accent:     #6c4fff;
  --online:     #22c55e;
  --live-red:   #ef4444;
  --text-main:  #e5e7eb;
  --text-muted: #6b7280;
  --text-dim:   #9ca3af;
  --teal-start: #0d9488; --teal-end: #06b6d4;
  --pink-start: #db2777; --pink-end: #f97316;
  --cyan-start: #0891b2; --cyan-end: #06b6d4;
  --warn: #f97316;
}

html, body {
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: "PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  height: 100%;
  overflow-x: hidden;
  overscroll-behavior-x: none;
  touch-action: pan-y;
}

.app-wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  padding: 12px;
  gap: 10px;
  box-sizing: border-box;
}

/* ── BANNER ── */
.top-banner {
  width: 100%;
  height: auto;
  min-height: 60px;
  background: #000;
  flex-shrink: 0;
  position: relative;
  transition: height .3s ease;
  border-radius: 16px;
}
.banner-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
/* 左右渐变黑色遮罩 */
.top-banner::before,
.top-banner::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 15%;   /* 响应式宽度，桌面端约200px */
  z-index: 2;
  pointer-events: none;
}
.top-banner::before {
  left: 0;
  background: linear-gradient(to right, rgba(0,0,0,.85) 0%, rgba(0,0,0,.4) 60%, transparent 100%);
}
.top-banner::after {
  right: 0;
  background: linear-gradient(to left, rgba(0,0,0,.85) 0%, rgba(0,0,0,.4) 60%, transparent 100%);
}

/* ── MAIN ROW ── */
.main-row { display:flex; flex:1; align-items:stretch; gap:10px; }

/* ── VIDEO ── */
.video-section {
  flex:1; display:flex; flex-direction:column; min-width:0; gap:10px;
  overflow-y:auto;
  scrollbar-width:none;
}
.video-section::-webkit-scrollbar { display:none; }

.player-wrap {
  position:relative; width:100%; aspect-ratio:16/9;
  max-width: 1400px;
  margin: 0 auto;
  background:#000; overflow:hidden;
  border-radius: 16px;
}
#videoPlayer { width:100%; height:100%; object-fit:cover; display:block; background:#000; }

.offline-overlay {
  position:absolute; inset:0; background:rgba(0,0,0,.85);
  display:flex; align-items:center; justify-content:center; z-index:10;
}
.offline-box {
  display:flex; flex-direction:column; align-items:center; gap:14px;
  padding:36px 48px; background:#181b2a; border-radius:12px;
  border:1px solid var(--border);
}
.warn-icon { font-size:2.4rem; color:var(--warn); line-height:1; }
.offline-text { font-size:1rem; color:var(--text-dim); letter-spacing:.04em; }
.retry-btn {
  background:#fff; color:#111; border:none; border-radius:6px;
  padding:9px 44px; font-size:.95rem; font-weight:600;
  cursor:pointer; font-family:inherit; transition:opacity .15s;
}
.retry-btn:hover { opacity:.85; }

.live-badge {
  position:absolute; top:12px; left:14px; background:var(--live-red);
  color:#fff; font-size:.72rem; font-weight:700; padding:3px 10px;
  border-radius:4px; letter-spacing:.06em; z-index:20;
}
.p2p-badge {
  position:absolute; top:12px; right:14px; background:rgba(108,79,255,.85);
  color:#fff; font-size:.68rem; font-weight:600; padding:3px 9px;
  border-radius:4px; z-index:20;
}

/* ── TITLE BAR ── */
.stream-title-bar {
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 14px; min-height:40px;
  background:linear-gradient(90deg,#4c1d95,#6c4fff 60%,#7c3aed);
  border-radius: 12px;
}
.stream-title-text { font-size:.9rem; font-weight:600; color:#fff; letter-spacing:.04em; }
.viewer-count { font-size:.78rem; color:rgba(255,255,255,.7); }

/* ── INFO CARDS (desktop) ── */
.info-cards { display:flex; gap:16px; padding:16px; background:var(--bg-panel); border-radius:16px; }
.info-card {
  flex:1; border-radius:20px; padding:20px;
  display:flex; align-items:center; gap:12px;
  min-height:160px; position:relative; overflow:hidden;
}
.info-card.teal { background:linear-gradient(120deg,#0d7a72,#06c6c0); }
.info-card.pink { background:linear-gradient(120deg,#b91c6e,#f97040); }
.info-card.cyan { background:linear-gradient(120deg,#0369a1,#06b6d4); }
.info-card.green { background:linear-gradient(120deg,#166534,#16a34a); }
.info-card-title { font-size:.9rem; font-weight:800; color:#fff; margin-bottom:6px; z-index:2; position:relative; }
.info-card-body  { font-size:.78rem; color:rgba(255,255,255,.88); line-height:1.6; z-index:2; position:relative; }
.info-card-text  { flex:1; z-index:2; }
.info-card-img {
  position:absolute;
  right:0;
  bottom:0;
  height:100%;
  width:auto;
  object-fit:contain;
  object-position:bottom right;
  z-index:1;
  pointer-events:none;
}
.chat-panel {
  width:350px; flex-shrink:0; background:var(--bg-panel);
  border-left:1px solid var(--border);
  display:flex; flex-direction:column;
  height:100vh;
  position:sticky; top:0;
  overflow:hidden;
  border-radius: 16px;
}

.chat-tabs { display:flex; border-bottom:1px solid var(--border); flex-shrink:0; }
.chat-tab {
  flex:1; text-align:center; padding:12px 4px; font-size:.83rem;
  color:var(--text-muted); cursor:pointer; user-select:none;
  border-bottom:2px solid transparent; transition:color .15s;
}
.chat-tab.active { color:var(--text-main); border-bottom:2px solid var(--accent); }
.chat-tab:hover { color:var(--text-dim); }

.tab-content { display:none; flex-direction:column; flex:1; overflow:hidden; }
.tab-content.active-tab { display:flex; }

.chat-room-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 14px; border-bottom:1px solid var(--border); flex-shrink:0;
}
.room-label { font-size:.83rem; font-weight:600; color:var(--text-main); }
.online-badge {
  font-size:.72rem; color:var(--online);
  background:rgba(34,197,94,.15); padding:2px 10px;
  border-radius:10px; border:1px solid rgba(34,197,94,.35);
}

.chat-messages {
  flex:1; overflow-y:auto; padding:10px 12px;
  display:flex; flex-direction:column; gap:6px;
  scrollbar-width:thin; scrollbar-color:var(--border) transparent;
}
.chat-messages::-webkit-scrollbar { width:4px; }
.chat-messages::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

.chat-msg { font-size:.78rem; line-height:1.5; word-break:break-all; }
.chat-msg .nick { font-weight:600; margin-right:4px; }
.chat-msg .nick.system { color:#a855f7; }
.chat-msg .nick.user1  { color:#38bdf8; }
.chat-msg .nick.user2  { color:#fb923c; }
.chat-msg .nick.user3  { color:#4ade80; }
.chat-msg .nick.user4  { color:#f472b6; }
.chat-msg .nick.self   { color:#fbbf24; }
.chat-msg .body { color:var(--text-dim); }

/* ── INPUT BAR ── */
.chat-input-bar {
  display:flex; align-items:center; gap:8px;
  padding:10px 12px; border-top:1px solid var(--border);
  background:var(--bg-panel); flex-shrink:0;
}
.input-wrap { flex:1; position:relative; min-width:0; }
.chat-input {
  width:100%; background:var(--bg-input);
  border:1px solid var(--border); border-radius:20px;
  color:var(--text-main); font-size:.82rem;
  padding:8px 42px 8px 14px;
  outline:none; font-family:inherit;
}
.chat-input::placeholder { color:var(--text-muted); }
.chat-input:focus { border-color:var(--accent); }
.char-count {
  position:absolute; right:10px; bottom:50%; transform:translateY(50%);
  font-size:.62rem; color:var(--text-muted); pointer-events:none;
}
.send-btn {
  background:var(--accent); color:#fff; border:none;
  border-radius:18px; padding:8px 18px; font-size:.82rem;
  font-weight:600; cursor:pointer; font-family:inherit;
  white-space:nowrap; flex-shrink:0; transition:opacity .15s;
}
.send-btn:hover { opacity:.85; }

/* ── CHANNEL LIST ── */
.channel-list {
  padding:10px;
  display:flex;
  flex-direction:column;
  gap:10px;
  overflow-y:auto;
}

/* 频道卡片 */
.channel-card {
  display:flex;
  align-items:center;
  gap:14px;
  padding:12px 14px;
  border-radius:12px;
  background:var(--bg-card);
  border:1px solid var(--border);
  cursor:pointer;
  transition:border-color .15s, background .15s;
}
.channel-card:hover { border-color:var(--accent); }
.active-channel-card {
  border-color:var(--accent);
  background:linear-gradient(120deg,rgba(108,79,255,.18),rgba(108,79,255,.06));
}
.ch-offline { opacity:.55; }

/* 封面图区域 */
.ch-thumb {
  width:72px; height:52px;
  border-radius:8px;
  background:var(--bg-input);
  flex-shrink:0;
  overflow:hidden;
  position:relative;
  display:flex; align-items:center; justify-content:center;
}
.ch-thumb img {
  width:100%; height:100%;
  object-fit:cover;
  position:absolute; inset:0;
}
.ch-thumb-placeholder {
  font-size:1.6rem;
  z-index:1;
}

/* 文字信息 */
.ch-info {
  flex:1;
  display:flex;
  flex-direction:column;
  gap:4px;
  min-width:0;
}
.ch-name {
  font-size:.9rem;
  font-weight:700;
  color:var(--text-main);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.ch-sub {
  font-size:.75rem;
  color:var(--text-muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  min-height:1em;
}
.ch-live-badge {
  display:inline-block;
  background:var(--live-red);
  color:#fff;
  font-size:.68rem;
  font-weight:700;
  padding:2px 8px;
  border-radius:4px;
  letter-spacing:.04em;
  width:fit-content;
}
.ch-offline-badge {
  display:inline-block;
  background:var(--text-muted);
  color:#fff;
  font-size:.68rem;
  font-weight:600;
  padding:2px 8px;
  border-radius:4px;
  width:fit-content;
}

/* ── DOWNLOAD CARDS ── */
.download-cards {
  padding:10px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
  min-height:0;
}
.dl-card {
  flex:1;
  min-height:180px;
  border-radius:14px;
  display:flex;
  flex-direction:row;
  align-items:center;
  position:relative;
  overflow:hidden;
  padding:20px;
}
.dl-card.teal { background:linear-gradient(120deg,#0d7a72,#06c6c0); }
.dl-card.pink { background:linear-gradient(120deg,#b91c6e,#f97040); }
.dl-card.cyan { background:linear-gradient(120deg,#0369a1,#06b6d4); }
.dl-card.green { background:linear-gradient(120deg,#166534,#16a34a); }

.dl-card-text { flex:1; z-index:2; }
.dl-card-title {
  font-size:1rem;
  font-weight:800;
  color:#fff;
  margin-bottom:10px;
  line-height:1.3;
}
.dl-card-body {
  font-size:.85rem;
  color:rgba(255,255,255,.92);
  line-height:1.85;
}

.dl-player-img {
  position:absolute;
  right:0;
  bottom:0;
  height:100%;
  width:auto;
  object-fit:contain;
  object-position:bottom right;
  z-index:1;
  pointer-events:none;
}

.player-controls {
  position:absolute; bottom:0; left:0; right:0; z-index:30;
  display:flex; align-items:center; justify-content:space-between;
  padding:8px 12px;
  background:linear-gradient(transparent, rgba(0,0,0,.75));
  opacity:0; transition:opacity .25s;
  gap:8px;
}
.player-wrap:hover .player-controls,
.player-wrap.ctrl-visible .player-controls { opacity:1; }

.ctrl-left, .ctrl-right { display:flex; align-items:center; gap:6px; }

.ctrl-btn {
  background:none; border:none; cursor:pointer;
  color:#fff; padding:4px; border-radius:4px;
  display:flex; align-items:center; justify-content:center;
  transition:background .15s;
  flex-shrink:0;
}
.ctrl-btn:hover { background:rgba(255,255,255,.2); }
.ctrl-btn svg { width:22px; height:22px; fill:#fff; display:block; }

.danmu-btn {
  font-size:.72rem; font-weight:700; padding:3px 10px;
  border:1px solid rgba(255,255,255,.5); border-radius:4px;
  letter-spacing:.04em;
}
.danmu-btn.danmu-off { opacity:.45; }

.volume-slider {
  -webkit-appearance:none; appearance:none;
  width:64px; height:3px;
  background:rgba(255,255,255,.4); border-radius:2px; outline:none;
  cursor:pointer;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance:none; width:12px; height:12px;
  border-radius:50%; background:#fff; cursor:pointer;
}

/* ── 弹幕层 ── */
.danmu-layer {
  position:absolute; inset:0; z-index:25;
  pointer-events:none; overflow:hidden;
}
.danmu-item {
  position:absolute;
  left:100%;          /* 从播放器右边缘外开始 */
  white-space:nowrap;
  font-size:.88rem; font-weight:600;
  color:#fff; text-shadow:1px 1px 2px rgba(0,0,0,.8);
  animation:danmu-move linear forwards;
  pointer-events:none;
  will-change:transform;
}
@keyframes danmu-move {
  from { transform:translateX(0); }
  to   { transform:translateX(var(--danmu-dist, -9999px)); }
}

/* ── MOBILE ONLY ── */
.mobile-only { display:none; }

/* ════════════════════════════════════════
   MOBILE  ≤ 678px
   ════════════════════════════════════════ */
@media (max-width: 678px) {
  .mobile-only { display:block; }

  .top-banner { height:100px !important; }
  .banner-img { height:100px !important; object-fit:cover; }

  .main-row { flex-direction:column; }

  .player-wrap { aspect-ratio:16/9; }

  .offline-box { padding:22px 28px; gap:10px; }
  .warn-icon { font-size:2rem; }
  .offline-text { font-size:.9rem; }
  .retry-btn { padding:8px 36px; font-size:.88rem; }

  .chat-panel {
    width:100%;
    height:calc(100vh - 100px - 56.25vw - 40px);
    min-height:460px;
    position:static;
    border-left:none;
    border-top:none;
    display:flex;
    flex-direction:column;
  }

  .chat-tabs { background:var(--bg-deep); flex-shrink:0; }
  .chat-tab { font-size:.82rem; padding:11px 4px; }

  .chat-room-header { padding:9px 14px; }

  .tab-content { display:none; flex:1; overflow:hidden; min-height:0; }
  .tab-content.active-tab { display:flex; }

  .chat-messages {
    max-height:100%;
    padding:8px 12px;
  }

  .chat-input-bar { padding:8px 10px; gap:7px; }
  .chat-input {
    border-radius:20px;
    padding:8px 40px 8px 14px;
    font-size:16px; /* 防止 iOS 自动放大 */
  }
  .char-count { font-size:.6rem; }
  .send-btn { border-radius:18px; padding:8px 15px; font-size:.8rem; }

  .info-cards { display:none; }
}

/* ── DESKTOP ── */
@media (min-width: 679px) {
  #tab-download { display:none !important; }
  #content-download { display:none !important; }
}