/* TG-RSS 样式：亮/暗双主题，移动端优先 */

:root {
  /* 浅色主题：原生控件（下拉、滚动条、自动填充、日期选择器）跟随浅色 */
  color-scheme: light;
  --bg: #f5f7fa;
  --bg-elev: #ffffff;
  --fg: #16202b;
  --fg-muted: #596878;
  --border: #e2e8f0;
  /* --accent：品牌蓝，用作背景/描边；--accent-text：同色系但满足 4.5:1 的文字蓝 */
  --accent: #229ed9;
  --accent-text: #176a92;
  --accent-fg: #06283a;
  --accent-soft: rgba(34, 158, 217, 0.12);
  --danger: #c93636;
  --danger-text: #c93636;
  --ok: #247a56;
  --warn-text: #8f6216;
  --shadow: 0 6px 24px rgba(16, 32, 48, 0.08);
  --radius: 12px;
  --topbar-h: 56px;
  --sidebar-w: 264px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    /* 关键：按主题设置 color-scheme，否则原生下拉/滚动条按系统（浅色）绘制，
       出现「浅色底 + 浅色字」完全看不见的问题 */
    color-scheme: dark;
    --bg: #141d27;
    --bg-elev: #1c2531;
    --fg: #f2f6fa;
    --fg-muted: #a9b8c6;
    --border: #2a3a4a;
    --accent-text: #57b6e8;
    --danger-text: #e88a85;
    --warn-text: #e0a441;
    --accent-soft: rgba(34, 158, 217, 0.18);
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141d27;
  --bg-elev: #1c2531;
  --fg: #f2f6fa;
  --fg-muted: #a9b8c6;
  --border: #2a3a4a;
  --accent-text: #57b6e8;
  --danger-text: #e88a85;
  --warn-text: #e0a441;
  --accent-soft: rgba(34, 158, 217, 0.18);
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

/*
 * hidden 属性必须压过组件自己的 display 声明。
 * `.lightbox` 是 display:grid、`.sidebar-mask` 在 ≤900px 断点里是 display:block，
 * 在 WebKit/Safari 中作者样式会盖过 UA 的 [hidden]，导致遮罩与灯箱常驻：
 * 内容被 45% + 90% 两层黑底叠住 → 「整页变暗、字都看不到」。
 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* 占位符统一走 --fg-muted：避免 UA 默认占位色在某个主题下几乎看不见 */
input::placeholder, textarea::placeholder {
  color: var(--fg-muted);
  opacity: 1;
}

/* ------------------------------------------------------------------ 顶栏 */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), #1b7fb0);
  display: inline-block;
}

.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a {
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--fg-muted);
  font-weight: 500;
}
.nav a:hover { background: var(--accent-soft); text-decoration: none; color: var(--fg); }
.nav a.active { background: var(--accent-soft); color: var(--accent-text); }

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.badge {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-text);
}

.iconbtn {
  border: 0;
  background: transparent;
  color: var(--fg-muted);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
}
.iconbtn:hover { background: var(--accent-soft); color: var(--fg); }

#sidebar-toggle { display: none; }

/* ----------------------------------------------------------------- 布局 */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: calc(100vh - var(--topbar-h));
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 14px 10px;
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
}

.sidebar-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-muted);
  padding: 0 8px 10px;
}

.channel-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.channel-list li a, .channel-list li span.row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--fg);
}
.channel-list li a:hover { background: var(--accent-soft); text-decoration: none; }
.channel-list li a.active { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }
.channel-list .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  object-fit: cover; background: var(--border); flex: none;
}
.channel-list .avatar.fallback {
  display: grid; place-items: center; font-size: 12px; color: var(--fg-muted);
}
.channel-list .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.channel-list .lock { margin-left: auto; color: var(--fg-muted); font-size: 12px; }

.sidebar-foot { margin-top: 16px; padding: 10px 8px 0; border-top: 1px solid var(--border); display: grid; gap: 6px; }

/* 侧栏底部：关于 / 版本号 / 仓库地址 */
.sidebar-about {
  margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border);
  display: grid; gap: 5px; font-size: 12px; color: var(--fg-muted);
}
.sidebar-about .about-row { display: flex; gap: 8px; align-items: baseline; }
.sidebar-about .about-row > span:first-child { flex: none; min-width: 30px; }
.sidebar-about .v { word-break: break-all; line-height: 1.5; }
.sidebar-about a.v { color: var(--accent-text); }
.sidebar-link { color: var(--fg-muted); font-size: 14px; }

.sidebar-mask { display: none; }

.app {
  padding: 20px clamp(14px, 3vw, 32px) 80px;
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  outline: none;
}
.app.wide { max-width: 1280px; }

.loading, .empty, .errorbox {
  padding: 40px 16px;
  text-align: center;
  color: var(--fg-muted);
}
.errorbox { color: var(--danger-text); }
.linkbtn {
  border: 0; background: transparent; color: var(--accent-text);
  cursor: pointer; padding: 2px 4px; border-radius: 6px;
}
.linkbtn:hover { background: var(--accent-soft); }
.muted { color: var(--fg-muted); }

/* ----------------------------------------------------------------- 消息卡 */

.view-head {
  display: flex; align-items: flex-start; gap: 14px;
  margin-bottom: 18px;
}
.view-head img.avatar { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; }
.view-head h1 { margin: 0 0 4px; font-size: 21px; line-height: 1.3; }
.view-head .sub { color: var(--fg-muted); font-size: 13.5px; }
.view-head .desc { margin-top: 6px; color: var(--fg-muted); font-size: 14px; }

.posts { display: flex; flex-direction: column; gap: 14px; }

.post {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.post-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--fg-muted);
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.post-head .ch { color: var(--accent-text); font-weight: 600; }
.post-head .sep { opacity: .5; }
.post-text { word-break: break-word; }
.post-text blockquote {
  margin: 8px 0;
  padding: 6px 12px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  color: var(--fg-muted);
}
.post-text pre, .post-text code { font-family: var(--mono); font-size: 13.5px; }
.post-text pre {
  background: rgba(127, 127, 127, 0.12);
  padding: 10px; border-radius: 8px; overflow-x: auto;
}
.post-foot {
  display: flex; gap: 12px; align-items: center;
  margin-top: 10px; font-size: 13px; color: var(--fg-muted);
}

/* 媒体块 */
.media { display: grid; gap: 8px; margin-top: 10px; }
.media.media-1 { grid-template-columns: 1fr; }
.media.media-n { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

.media-item {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  background: rgba(127, 127, 127, 0.1);
  border: 1px solid var(--border);
}
.media-item img.thumb, .media-item video {
  display: block; width: 100%; max-height: 420px;
  object-fit: cover; background: #000;
}
.media-item video { object-fit: contain; }
/* 信息流 #标签 筛选条 */
.tag-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 2px 0 14px; align-items: center; }
/* 标签展开/折叠：按钮固定在顶栏「媒体」之后 */
.nav .nav-tag-btn {
  background: none; border: 0; color: var(--fg-muted); cursor: pointer;
  padding: 7px 10px; font-size: 14px; border-radius: 8px;
}
.nav .nav-tag-btn:hover { color: var(--fg); background: var(--accent-soft); }
.tag-chip {
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--fg-muted);
  border-radius: 999px; padding: 5px 12px; font-size: 13px; cursor: pointer;
}
.tag-chip:hover { border-color: var(--accent); color: var(--accent-text); }
.tag-chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.taglink { color: var(--accent-text); font-weight: 600; text-decoration: none; }
.taglink:hover { text-decoration: underline; }

/* 图片/音频等媒体下方的操作行（查看大图 / 下载） */
.media-actions { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.media-card .card-actions { margin-top: 8px; }

.media-inline { padding: 12px; display: flex; gap: 10px; align-items: center; }
.media-inline .meta { min-width: 0; }
.media-inline .title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.media-inline .sub { color: var(--fg-muted); font-size: 13px; }
.media-inline .actions { margin-left: auto; display: flex; gap: 8px; flex: none; }

audio { width: 100%; }

.filecard {
  display: flex; align-items: center; gap: 12px;
  padding: 12px;
}
.filecard .ico {
  width: 40px; height: 40px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-text);
  font-size: 12px; font-weight: 700; text-transform: uppercase;
}
.filecard .info { min-width: 0; flex: 1; }
.filecard .nm { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.filecard .sz { color: var(--fg-muted); font-size: 13px; }

/* ---------------------------------------------------------------- 按钮/表单 */

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  padding: 7px 14px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { border-color: var(--accent); color: var(--accent-text); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.primary:hover { filter: brightness(1.06); color: var(--accent-fg); }
.btn.danger { color: var(--danger-text); }
.btn.danger:hover { border-color: var(--danger); }
.btn.sm { padding: 4px 10px; font-size: 13px; border-radius: 7px; }

.loadmore { display: flex; justify-content: center; margin-top: 18px; }

.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field > label { font-size: 13.5px; color: var(--fg-muted); }
.input, .select, .textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg);
  color: var(--fg);
}
.input:focus, .select:focus, .textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.hint { font-size: 12.5px; color: var(--fg-muted); }
.checkbox { display: flex; align-items: center; gap: 8px; font-size: 14px; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 4px; font-size: 16px; }
.card h2 + .hint { margin-bottom: 14px; }
.card-title { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.tabs a, .tabs button {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--fg-muted); cursor: pointer; font-size: 14px;
}
.tabs a.active, .tabs button.active {
  background: var(--accent); border-color: var(--accent); color: var(--accent-fg); font-weight: 600;
}
.tabs a:hover, .tabs button:hover { text-decoration: none; color: var(--fg); }
.tabs a.active:hover { color: var(--accent-fg); }

.formgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }

/* 频道管理表 */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 9px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.table th { color: var(--fg-muted); font-weight: 500; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.table tr:last-child td { border-bottom: 0; }
.table .row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.pill {
  font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-text); white-space: nowrap;
}
.pill.warn { background: rgba(217, 160, 60, .16); color: var(--warn-text); }
.pill.off { background: rgba(127,127,127,.16); color: var(--fg-muted); }

/* ---------------------------------------------------------------- 媒体模式 */

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
}
.media-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  display: flex; flex-direction: column;
  transition: transform .12s ease, box-shadow .12s ease;
}
.media-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.media-card .cover {
  position: relative; aspect-ratio: 4/3; background: rgba(127,127,127,.12);
  display: grid; place-items: center; overflow: hidden;
}
.media-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.media-card .cover .ph { color: var(--fg-muted); font-size: 28px; }
.media-card .cover .dur {
  position: absolute; right: 6px; bottom: 6px;
  background: rgba(0,0,0,.72); color: #fff; font-size: 12px;
  padding: 1px 6px; border-radius: 6px;
}
.media-card .body { padding: 9px 11px; }
.media-card .body .t { font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.media-card .body .s { font-size: 12.5px; color: var(--fg-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------------------------------------------------------- 灯箱 */

.lightbox {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(0, 0, 0, 0.9);
  display: grid; place-items: center;
  padding: 24px;
}
.lightbox .lb-inner { width: min(1100px, 100%); max-height: 100%; display: grid; gap: 10px; justify-items: center; }
.lightbox video { width: 100%; max-height: 78vh; background: #000; border-radius: 8px; }
.lightbox img { max-width: 100%; max-height: 78vh; border-radius: 8px; }
.lightbox audio { width: min(560px, 100%); }
.lightbox .lb-bar { display: flex; gap: 10px; align-items: center; color: #eee; font-size: 13px; flex-wrap: wrap; justify-content: center; }
.lightbox .lb-close {
  position: absolute; top: 14px; right: 16px;
  border: 0; background: rgba(255,255,255,.14); color: #fff;
  width: 38px; height: 38px; border-radius: 50%; cursor: pointer; font-size: 20px;
}
.lightbox .btn { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.3); color: #fff; }
.lightbox .btn:hover { border-color: #fff; color: #fff; }

/* ---------------------------------------------------------------- Toast */

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  background: var(--fg); color: var(--bg);
  padding: 10px 16px; border-radius: 10px; z-index: 100;
  box-shadow: var(--shadow); font-size: 14px; max-width: 90vw;
}
.toast.error { background: var(--danger); color: #fff; }
.toast.ok { background: var(--ok); color: #fff; }

/* -------------------------------------------------------------- 登录/初始化 */

.auth-wrap { max-width: 420px; margin: 40px auto; }
.auth-wrap h1 { font-size: 20px; margin: 0 0 6px; }
.auth-wrap .hint { margin-bottom: 18px; }

.stat-row { display: flex; gap: 14px; flex-wrap: wrap; }
.stat {
  flex: 1 1 140px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px;
}
.stat .k { font-size: 12.5px; color: var(--fg-muted); }
.stat .v { font-size: 22px; font-weight: 700; }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  #sidebar-toggle { display: inline-flex; }
  .sidebar {
    position: fixed; z-index: 60; top: var(--topbar-h); left: 0;
    width: min(320px, 86vw); transform: translateX(-105%);
    transition: transform .18s ease;
    box-shadow: var(--shadow);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-mask {
    display: block; position: fixed; inset: var(--topbar-h) 0 0 0;
    background: rgba(0,0,0,.45); z-index: 50;
  }
  .nav a, .nav .nav-tag-btn { padding: 7px 9px; font-size: 14px; }
  /* 频道列表在移动端压行高：头像与内边距同时收紧 */
  .channel-list { gap: 1px; }
  .channel-list li a { padding: 6px 8px; gap: 8px; }
  .channel-list .avatar { width: 24px; height: 24px; font-size: 11px; }
  .channel-list li a .name { font-size: 14px; }
  .channel-list .lock { padding: 1px 5px; font-size: 11px; }
  .sidebar-foot { margin-top: 12px; padding-top: 8px; gap: 5px; }
  .sidebar-about { margin-top: 8px; padding-top: 8px; }
  .app { padding: 16px 12px 70px; }
  .media-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
}

@media (max-width: 560px) {
  .brand #site-title { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .channel-list li a { padding: 5px 8px; }
  .tag-bar { gap: 6px; margin-bottom: 10px; }
  .tag-chip { padding: 4px 10px; font-size: 12px; }
  .post { padding: 12px; }
  .view-head h1 { font-size: 18px; }
}

/* 人机验证组件占位 */
.turnstile-box { margin: 10px 0 4px; }