/* ===========================================================
   ReelUs · 精修版样式（在原始界面基础上提质，结构不变）
   - 保留 Pacifio 手写标题字体
   - 保留全部原类名，app.js 无需改动
   - 新增：层级化排版、精致阴影、微交互、焦点态、暗色打磨
   =========================================================== */

/* 自托管手写字体（标题沿用原字体） */
@font-face {
  font-family: "Pacifico";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/fonts/pacifico.woff2") format("woff2");
}

:root {
  /* 色彩：更克制、更协调的浅色体系 */
  --bg: #f5f6fa;
  --bg-2: #eef1f7;
  --card: #ffffff;
  --text: #1b2130;
  --muted: #717a8a;
  --accent: #3d63f5;          /* 精炼皇家蓝 */
  --accent-strong: #2f4fdc;
  --accent-soft: #eaf0ff;     /* 浅蓝底色（聚焦/标签） */
  --line: #e8ebf1;
  --line-strong: #dde1ea;

  /* 圆角 / 阴影 / 缓动 */
  --radius: 16px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 3px rgba(20,30,60,.06), 0 1px 2px rgba(20,30,60,.04);
  --shadow-md: 0 12px 30px -14px rgba(20,30,60,.20);
  --shadow-lg: 0 26px 54px -22px rgba(20,30,60,.30);
  --shadow-accent: 0 8px 22px -8px rgba(61,99,245,.50);
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 统一焦点态（键盘可达性） */
a:focus-visible,
button:focus-visible,
.player:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===================== 顶部横幅 ===================== */
.site-header {
  position: relative;
  width: 100%;
  min-height: 42vh;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  overflow: hidden;
}
.header-bg {
  position: absolute;
  inset: 0;
  background: url("assets/header.jpg") center / cover no-repeat;
  z-index: 0;
}
/* 多层渐变：左侧压暗保证文字可读 + 底部柔和淡出到页面底色 */
.header-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right,
      rgba(8,12,28,.62) 0%,
      rgba(8,12,28,.30) 42%,
      rgba(8,12,28,.06) 100%),
    linear-gradient(to bottom,
      rgba(8,12,28,.34) 0%,
      rgba(8,12,28,0) 38%),
    linear-gradient(to bottom,
      transparent 58%,
      var(--bg) 100%);
}
.header-content {
  position: relative;
  z-index: 1;
  text-align: left;
  padding: 30px 28px;
  color: #fff;
}
.site-header h1 {
  margin: 0;
  font-family: "Pacifico", "Segoe Script", cursive;
  font-size: clamp(46px, 8vw, 76px);
  font-weight: 400;
  letter-spacing: .5px;
  line-height: 1;
  text-shadow: 0 4px 22px rgba(8,12,28,.45);
}
.subtitle {
  margin: 10px 0 0;
  color: rgba(255,255,255,.92);
  font-size: 14px;
  font-style: italic;
  font-weight: 300;
  letter-spacing: 1px;
  text-shadow: 0 1px 10px rgba(8,12,28,.4);
}

/* ===================== 吸顶胶囊页签 ===================== */
.tabs {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.tab {
  border: 1px solid var(--line-strong);
  background: var(--card);
  color: var(--text);
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.tab:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-accent);
}

#app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px 56px;
}
.loading {
  text-align: center;
  color: var(--muted);
  padding: 48px 0;
  font-size: 15px;
}

/* ===================== 相册与卡片网格 ===================== */
.album { margin-top: 44px; }
.album-title {
  font-size: 22px;
  font-weight: 700;
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  margin-bottom: 20px;
  letter-spacing: .3px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
}

/* 视频预览：首帧即封面，hover 轻微放大 */
.player {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0c1018;
  display: block;
  cursor: pointer;
  object-fit: cover;
  border: 0;
  transition: transform .45s var(--ease);
}
.card:hover .player { transform: scale(1.04); }

.meta { padding: 16px 18px 8px; }
.meta h3 { margin: 0 0 5px; font-size: 17px; font-weight: 600; }
.date { margin: 0; color: var(--accent); font-size: 13px; font-weight: 500; letter-spacing: .3px; }
.desc { margin: 9px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

/* ===================== 留言区 ===================== */
.comments {
  padding: 12px 18px 18px;
  border-top: 1px solid var(--line);
  margin-top: 10px;
}
.comments-title {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 12px;
  font-weight: 600;
  letter-spacing: .3px;
}
.comment-list { display: flex; flex-direction: column; gap: 10px; }
.comment-empty { color: var(--muted); font-size: 13px; margin: 0 0 12px; }
.comment-as { margin: 0 0 8px; font-size: 12px; color: var(--muted); }
.comment-as b { color: var(--accent); font-weight: 600; }

.comment-toolbar { margin: 0 0 8px; }
.emoji-toggle {
  border: 1px solid var(--line-strong);
  background: var(--card);
  color: var(--text);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.emoji-toggle:hover { border-color: var(--accent); color: var(--accent); }

.emoji-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  max-height: 140px;
  overflow-y: auto;
  padding: 10px;
  margin-bottom: 10px;
  background: var(--bg-2);
  border-radius: var(--radius-sm);
}
.emoji-panel[hidden] { display: none; }
.emoji-item {
  border: none;
  background: transparent;
  font-size: 20px;
  line-height: 1;
  padding: 4px;
  cursor: pointer;
  border-radius: 8px;
  transition: background .15s var(--ease);
}
.emoji-item:hover { background: var(--accent-soft); }

.comment {
  background: var(--bg-2);
  border-radius: var(--radius-sm);
  padding: 9px 13px;
}
.comment-name { font-weight: 600; font-size: 13px; color: var(--accent); }
.comment-time { font-size: 11px; color: var(--muted); margin-left: 8px; }
.comment-text { margin: 4px 0 0; font-size: 14px; color: var(--text); white-space: pre-wrap; word-break: break-word; line-height: 1.55; }

.comment-form { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.comment-form input,
.comment-form textarea {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font: inherit;
  background: var(--card);
  color: var(--text);
  resize: vertical;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.comment-form button {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.comment-form button:hover:not(:disabled) { background: var(--accent-strong); transform: translateY(-1px); }
.comment-form button:disabled { opacity: .6; cursor: default; }

/* ===================== 页脚 ===================== */
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 28px 0 44px;
  letter-spacing: .3px;
}

/* ===================== 全屏播放层 ===================== */
.player-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6,8,16,.96);
  z-index: 100;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.player-overlay.open { display: flex; }

#fullscreenVideo {
  width: 100%;
  height: 100%;
  max-height: 100vh;
  max-width: 100vw;
  object-fit: contain;
  background: #000;
}

.overlay-close {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,.16);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  z-index: 101;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.overlay-close:hover { background: rgba(255,255,255,.30); transform: rotate(90deg); }

/* ===================== 响应式 ===================== */
@media (max-width: 600px) {
  .site-header { min-height: 38vh; }
  .header-content { padding: 24px 20px; }
  .site-header h1 { font-size: 40px; }
  .subtitle { font-size: 11px; }
  .grid { grid-template-columns: 1fr; gap: 18px; }
  #app { padding: 0 16px 48px; }
}

/* ===================== 暗色模式（系统级） ===================== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1117;
    --bg-2: #171b22;
    --card: #161a21;
    --text: #e7eaf0;
    --muted: #9aa3b2;
    --accent: #6f8dff;
    --accent-strong: #8aa0ff;
    --accent-soft: #1e2748;
    --line: #262c36;
    --line-strong: #323a47;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
    --shadow-md: 0 14px 32px -14px rgba(0,0,0,.6);
    --shadow-lg: 0 26px 54px -22px rgba(0,0,0,.7);
    --shadow-accent: 0 8px 22px -8px rgba(111,141,255,.5);
  }
  .comment { background: var(--bg-2); }
  .comment-form input,
  .comment-form textarea { background: var(--card); border-color: var(--line-strong); }
  .emoji-panel { background: var(--bg-2); }
  .emoji-item:hover { background: var(--accent-soft); }
  .tab { border-color: var(--line-strong); }
  .tab:hover { color: var(--accent); border-color: var(--accent); }
}

/* ===================== 减弱动效偏好 ===================== */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .card:hover, .player:hover { transform: none; }
}