/* 看片台：冷白底 + 墨色文字 + 字幕荧光黄（只用在选题公式和点中时的闪一下）。
   视觉主角是视频本身：剧本每段配关键帧，剪辑节奏条标出段落。 */
:root {
  --bg: #f2f4f5;
  --surface: #ffffff;
  --ink: #17202a;
  --ink-2: #4b5664;
  --ink-3: #87919c;
  --rule: #d9dee3;
  --marker: #ffd43b;
  --cut-a: #17202a;
  --cut-b: #a3acb6;
  --bad: #c93c3c;
  --douyin: #0f9f9a;
  --bili: #d9558d;
  --xhs: #e5484d;
  --radius: 6px;
  --measure: 38em;
  --nav-h: 46px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101317;
    --surface: #1a1f25;
    --ink: #e8ecef;
    --ink-2: #aab3bd;
    --ink-3: #75808b;
    --rule: #2a3037;
    --cut-a: #e8ecef;
    --cut-b: #58626d;
    --bad: #ef6b6b;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-variant-numeric: tabular-nums;
  padding-bottom: calc(60px + env(safe-area-inset-bottom));
}

a { color: inherit; }

main {
  max-width: 720px;
  margin: 0 auto;
  padding: calc(12px + env(safe-area-inset-top)) 16px 40px;
}

h1 { font-size: 23px; line-height: 1.4; font-weight: 650; margin: 6px 0 6px; }
h2 { font-size: 18px; line-height: 1.4; font-weight: 650; margin: 28px 0 10px; }
h3 { font-size: 16px; line-height: 1.5; font-weight: 650; margin: 24px 0 8px; }
p { margin: 0 0 12px; }

.muted { color: var(--ink-2); }
.faint { color: var(--ink-3); font-size: 13px; }
.bad { color: var(--bad); }

/* ---------- 提交 ---------- */
.composer textarea {
  width: 100%;
  min-height: 92px;
  padding: 12px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}
.composer textarea:focus-visible, button:focus-visible, input:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.composer .row { margin-top: 10px; }

button {
  appearance: none;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  border-radius: var(--radius);
  padding: 9px 16px;
  font: inherit;
  font-size: 15px;
  cursor: pointer;
}
button.primary { background: var(--ink); color: var(--bg); }
button.small { padding: 5px 12px; font-size: 14px; }
button:disabled { opacity: 0.45; cursor: default; }

.notice { margin: 12px 0 0; font-size: 15px; }
.notice:empty { display: none; }
a.small { font-size: 14px; color: var(--ink-2); }

/* ---------- 列表：左边封面（第一个镜头），右边文字 ---------- */
.list { list-style: none; margin: 0; padding: 0; }
.list > li { border-top: 1px solid var(--rule); }
.list > li:last-child { border-bottom: 1px solid var(--rule); }
.list a.item { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 12px; padding: 14px 0; text-decoration: none; }
.cover { display: block; width: 64px; height: 85px; border-radius: var(--radius); object-fit: cover; object-position: center 30%; background: var(--rule); }
.item-title { font-weight: 600; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.item-line { color: var(--ink-2); font-size: 14px; line-height: 1.55; margin-top: 3px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.item-meta { display: flex; gap: 4px 12px; flex-wrap: wrap; align-items: center; color: var(--ink-3); font-size: 13px; margin-top: 6px; }
.item-labels { font-size: 13px; color: var(--ink-3); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.platform { display: inline-flex; align-items: center; gap: 5px; }
.platform::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ink-3); flex: none; }
.platform.douyin::before { background: var(--douyin); }
.platform.bilibili::before { background: var(--bili); }
.platform.xiaohongshu::before { background: var(--xhs); }

.state { font-size: 13px; }
.state.failed, .state.attention { color: var(--bad); }

/* 步骤进度：每步一格，正在跑的那格呼吸闪烁（唯一的自动动画） */
.steps { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 3px; margin-top: 8px; }
.steps span { height: 4px; border-radius: 2px; background: var(--rule); }
.steps span.done { background: var(--ink); }
.steps span.failed { background: var(--bad); }
.steps span.running { background: var(--ink-2); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }

/* 表现：爆款实心，其余描边，越弱越淡 */
.level { display: inline-block; font-size: 12px; line-height: 18px; padding: 0 6px; border: 1px solid var(--rule); border-radius: 4px; color: var(--ink-2); white-space: nowrap; }
.level.hit { background: var(--ink); border-color: var(--ink); color: var(--bg); font-weight: 650; }
.level.good { border-color: var(--ink-2); color: var(--ink); }
.level.weak, .level.unknown { color: var(--ink-3); }

/* ---------- 视频页：顶部 ---------- */
.back { display: inline-block; padding: 8px 16px 8px 0; color: var(--ink-2); text-decoration: none; font-size: 15px; }
.byline { display: flex; gap: 4px 14px; flex-wrap: wrap; color: var(--ink-2); font-size: 14px; }
.byline a { text-decoration-color: var(--rule); text-underline-offset: 3px; }

.verdict { margin: 18px 0 14px; }
.verdict-line { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--ink-2); margin-bottom: 6px; }
.verdict .level { font-size: 13px; line-height: 20px; padding: 0 8px; }
.lede { font-size: 19px; line-height: 1.6; font-weight: 500; margin: 0; }

.stats { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin: 16px 0 12px; }
.stats > div { padding: 9px 0; min-width: 0; }
.stats > div + div { padding-left: 10px; border-left: 1px solid var(--rule); }
.stats b { display: block; font-size: 18px; font-weight: 650; line-height: 1.3; white-space: nowrap; }
.stats small { color: var(--ink-3); font-size: 12px; white-space: nowrap; }
@media (max-width: 400px) { .stats b { font-size: 16px; } .stats > div + div { padding-left: 8px; } }

.labels { display: flex; flex-wrap: wrap; gap: 2px 16px; font-size: 14px; margin: 0; }
.labels a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--rule); text-underline-offset: 3px; }
.label-name { color: var(--ink-3); margin-right: 6px; }

/* 章节栏：吸顶，滚到哪一节就标出哪一节 */
.sections {
  position: sticky; top: 0; z-index: 5;
  display: flex; gap: 24px;
  margin: 22px -16px 0; padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.sections button { border: 0; border-radius: 0; background: none; padding: 0; height: var(--nav-h); font-size: 16px; color: var(--ink-3); }
.sections button[aria-current="true"] { color: var(--ink); font-weight: 600; box-shadow: inset 0 -2px 0 var(--ink); }

.banner { background: var(--surface); border-left: 3px solid var(--ink-2); padding: 10px 12px; font-size: 14px; margin: 16px 0 0; border-radius: 0 var(--radius) var(--radius) 0; }
.banner.bad { border-left-color: var(--bad); }

/* 每一节以一道墨线开头 */
.sec { margin-top: 34px; scroll-margin-top: calc(var(--nav-h) + 8px); }
.sec > h2 { font-size: 21px; margin: 0 0 12px; padding-top: 12px; border-top: 2px solid var(--ink); }
.sec h3 { font-size: 17px; }

/* ---------- 判断 ---------- */
.vs { margin: 14px 0 6px; }
.vs svg { display: block; width: 100%; height: auto; overflow: visible; }
.vs .bar { fill: var(--ink-3); }
.vs .bar.mine { fill: var(--ink); }
.vs .bar.picked { fill: var(--ink-2); }
.vs .bar.mine.picked { fill: var(--ink); }
.vs .median { stroke: var(--ink-2); stroke-width: 1; stroke-dasharray: 3 3; }
.vs .hit { fill: transparent; cursor: pointer; }
.vs text { font-size: 11px; fill: var(--ink-2); text-anchor: middle; }
.vs figcaption { font-size: 13px; color: var(--ink-3); margin-top: 6px; line-height: 1.6; }

.needs { list-style: none; padding: 0; margin: 0 0 8px; }
.needs li { margin: 0 0 10px; }
.needs b { margin-right: 8px; }

.prose { max-width: var(--measure); }
.prose h1, .prose h2, .prose h3 { font-size: 17px; margin: 24px 0 8px; }
.prose blockquote { margin: 0 0 14px; padding-left: 12px; border-left: 2px solid var(--rule); color: var(--ink-2); font-size: 15px; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 14px; }
.prose li { margin: 4px 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 0 0 14px; display: block; overflow-x: auto; }
.prose th, .prose td { border-bottom: 1px solid var(--rule); padding: 6px 8px 6px 0; text-align: left; vertical-align: top; min-width: 4.5em; }
.prose a { color: var(--ink-2); }

/* ---------- 借鉴：每条一个做法，"换个选题 / 怎么改"单独托起来 ---------- */
.points { list-style: none; padding: 0; margin: 0; }
.points > li { padding: 12px 0 4px; border-top: 1px solid var(--rule); }
.points > li:first-child { border-top: 0; padding-top: 0; }
.point { font-weight: 650; line-height: 1.55; margin-bottom: 4px; }
.time { display: inline-block; font-size: 12px; font-weight: 400; line-height: 18px; color: var(--ink-2); border: 1px solid var(--rule); border-radius: 999px; padding: 0 8px; vertical-align: 1px; white-space: nowrap; }
button.time { background: none; }
.todo { background: var(--surface); border-radius: var(--radius); padding: 8px 12px; font-size: 15px; }
.todo span { display: block; font-size: 12px; color: var(--ink-3); }
.plain { padding-left: 1.2em; margin: 0 0 12px; }
.plain li { margin: 4px 0; }

/* ---------- 模板：[变量] 是待填的空，骨架是带编号的步骤 ---------- */
.recipe { margin: 0; }
.recipe dt { font-size: 13px; color: var(--ink-3); margin-top: 10px; }
.recipe dd { margin: 2px 0 0; }
.slot { display: inline-block; max-width: 100%; line-height: 1.45; padding: 0 4px; margin: 0 1px; border-radius: 4px; box-shadow: inset 0 0 0 1px var(--ink-3); font-weight: 600; }
.formula { line-height: 2; }
.formula mark {
  background: linear-gradient(transparent 38%, var(--marker) 38%, var(--marker) 88%, transparent 88%);
  color: inherit;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  padding: 0 2px;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .formula mark { background: var(--marker); color: #17202a; }
  .formula .slot { box-shadow: inset 0 0 0 1px #17202a; }
}

.beats { list-style: none; counter-reset: beat; padding: 0; margin: 0 0 8px; }
.beats li { counter-increment: beat; position: relative; padding: 5px 0 5px 34px; line-height: 1.55; }
.beats li::before {
  content: counter(beat);
  position: absolute; left: 0; top: 6px;
  width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--ink); color: var(--bg);
  font-size: 12px; font-weight: 650; line-height: 1;
}
.beats li:not(:last-child)::after { content: ""; position: absolute; left: 10.5px; top: 30px; bottom: -6px; width: 1px; background: var(--rule); }

/* ---------- 剧本 ---------- */
.reel { margin: 4px 0 6px; }
.reel-parts { position: relative; height: 34px; }
.reel-part {
  position: absolute; top: 0; bottom: 6px;
  border: 0; border-left: 1px solid var(--ink-3); border-radius: 0;
  background: none; padding: 0 0 0 4px; text-align: left;
  font-size: 11px; line-height: 1.25; color: var(--ink-2);
  overflow: hidden;
}
.reel-bar { display: flex; height: 26px; }
.reel-bar i { display: block; height: 100%; background: var(--cut-a); }
.reel-bar i:nth-child(even) { background: var(--cut-b); }
.reel-scale { display: flex; justify-content: space-between; font-size: 11px; color: var(--ink-3); margin-top: 3px; }

.script { list-style: none; padding: 0; margin: 0; }
.seg { padding: 14px 0 6px; border-top: 1px solid var(--rule); scroll-margin-top: calc(var(--nav-h) + 8px); }
.seg-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.seg-head b { font-size: 17px; }
.seg-time { font-size: 13px; color: var(--ink-3); }
.strip { display: flex; gap: 4px; overflow-x: auto; margin: 0 -16px 10px 0; padding-right: 16px; scrollbar-width: none; }
.strip::-webkit-scrollbar { display: none; }
.strip a { flex: none; }
.strip img { display: block; height: 104px; width: auto; border-radius: 4px; background: var(--rule); }
.seg-detail { font-size: 14px; color: var(--ink-2); line-height: 1.65; margin-bottom: 8px; }
.seg-detail span { color: var(--ink-3); margin-right: 8px; }
.seg.flash { animation: flash 1.4s ease-out; }
/* 封面按原比例显示：竖版限高，横版（B站）撑满宽度 */
.cover-seg img { display: block; max-width: 100%; max-height: 360px; width: auto; height: auto; border-radius: 4px; margin-bottom: 10px; background: var(--rule); }
@keyframes flash { from { background: color-mix(in srgb, var(--marker) 40%, transparent); } }

/* ---------- 素材：默认收起 ---------- */
details { border-top: 1px solid var(--rule); }
details:last-of-type { border-bottom: 1px solid var(--rule); }
summary { display: flex; justify-content: space-between; padding: 12px 0; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "展开"; font-size: 13px; color: var(--ink-3); }
details[open] > summary::after { content: "收起"; }
/* 剧本里一段台词太长时，后面几句的折叠：一行小字，点开就消失 */
.seg-detail details { border: 0; }
.seg-detail summary { display: block; padding: 2px 0 0; font-size: 13px; color: var(--ink-3); }
.seg-detail summary::after { content: ""; }
.seg-detail details[open] > summary { display: none; }
.fold { padding: 0 0 14px; }
#materials .faint { margin-top: 14px; }

.sheets figure { margin: 0 0 18px; }
.sheets img { width: 100%; height: auto; display: block; border-radius: 4px; background: var(--rule); }
.sheets figcaption { font-size: 13px; color: var(--ink-3); margin-top: 4px; }

.transcript { white-space: pre-wrap; font-size: 15px; max-width: var(--measure); }
.desc { white-space: pre-wrap; max-width: var(--measure); }
.desc-seg summary { color: var(--ink-2); }
.comments { list-style: none; padding: 0; margin: 0; }
.comments li { padding: 10px 0; border-top: 1px solid var(--rule); }
.comments li:first-child { border-top: 0; padding-top: 0; }
.comments .faint { display: block; }

.step-list { list-style: none; padding: 0; margin: 8px 0 14px; font-size: 14px; }
.step-list li { display: flex; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--rule); }
.step-list .name { flex: 1; }
.step-list .note { display: block; color: var(--ink-3); font-size: 12px; }
.warnings { padding-left: 1.2em; font-size: 14px; margin: 0 0 12px; }
.warnings li { margin: 4px 0; }
.warnings .faint { margin-left: 8px; }

/* ---------- 视频库 ---------- */
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 10px; }
.toolbar input {
  flex: 1 1 100%;
  padding: 10px 12px; border: 1px solid var(--rule); border-radius: var(--radius);
  background: var(--surface); color: var(--ink); font: inherit;
}
.chip { padding: 4px 12px; font-size: 14px; border-color: var(--rule); color: var(--ink-2); white-space: nowrap; flex: none; border-radius: 999px; }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.chip small { margin-left: 5px; color: var(--ink-3); font-size: 12px; }
.chip[aria-pressed="true"] small { color: inherit; opacity: 0.7; }

/* 每类筛选一行，标签多了就横向滑动，页面本身不横向滚动 */
.filters { margin: 0 0 6px; }
.filter { display: flex; align-items: center; gap: 10px; padding: 3px 0; }
.filter-name { flex: none; width: 2.2em; font-size: 13px; color: var(--ink-3); }
.chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; min-width: 0; padding: 2px 2px 2px 0; }
.chips::-webkit-scrollbar { display: none; }

/* ---------- 设置 ---------- */
.setup ol { padding-left: 1.4em; }
.msg { margin: 14px 0; overflow-wrap: anywhere; }
.msg.me { margin-left: 15%; padding: 9px 12px; background: var(--surface); border-radius: 12px; white-space: pre-wrap; }
.activity { list-style: none; margin: 8px 0 0; padding: 0; font-size: 14px; color: var(--ink-3); }
.activity .thinking { animation: thinking 1.4s ease-in-out infinite; }
@keyframes thinking { 50% { opacity: 0.4; } }
.chat-input textarea { font-size: 16px; }
.chats a { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; color: inherit; text-decoration: none; }
.login input { display: block; width: 100%; box-sizing: border-box; margin: 12px 0; padding: 10px 12px; font: inherit; font-size: 16px; color: inherit; background: none; border: 1px solid var(--ink-3); border-radius: 10px; }
.setup li { margin: 8px 0; }
code { font-family: inherit; background: var(--surface); border: 1px solid var(--rule); border-radius: 4px; padding: 1px 5px; font-size: 14px; word-break: break-all; }

/* ---------- 底部导航：图标 + 文字，当前页图标实心 ---------- */
nav.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0;
  display: flex; justify-content: center;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-top: 1px solid var(--rule);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 10;
}
nav.tabbar a {
  flex: 0 1 160px;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  padding: 7px 0 5px;
  text-decoration: none; color: var(--ink-3); font-size: 11px; line-height: 1.3;
}
nav.tabbar svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
nav.tabbar a[aria-current="page"] { color: var(--ink); font-weight: 600; }
nav.tabbar a[aria-current="page"] svg { fill: currentColor; }

.empty { padding: 28px 0; color: var(--ink-2); }

@media (prefers-reduced-motion: reduce) {
  .steps span.running, .seg.flash { animation: none; }
}