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p{font-size:12px;color:var(--secondary)}.site-footer>span{margin-left:auto;color:var(--secondary);font-size:11px}.site-footer .text-link{font-size:11px;color:var(--secondary)}dialog{border:0;max-width:560px;width:calc(100% - 40px);border-radius:12px;padding:30px;background:var(--page);box-shadow:0 20px 80px rgba(13,28,22,.25)}dialog::backdrop{background:rgba(14,28,21,.45);backdrop-filter:blur(3px)}.dialog-top{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}.dialog-top h2{font-size:24px}#dialog-body{font-size:14px;color:var(--secondary);margin-bottom:26px}#dialog-body p+p{margin-top:16px}#dialog-body strong{color:var(--ink)}#dialog-body ul{padding-left:20px}#dialog-body li{margin-bottom:10px}.toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%,25px);opacity:0;pointer-events:none;background:#2448ce;color:white;padding:12px 20px;border-radius:6px;max-width:calc(100% - 40px);font-size:13px;z-index:80;transition:opacity .2s,transform 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@media(hover:hover) and (pointer:fine){.button.primary:hover{background:var(--teal-dark)}.button.light:hover{background:#f5f7fa}.button.secondary:hover{background:#f5f7fa}.ghost-light:hover{background:#ffffff1c}.text-link:hover{text-decoration-color:currentColor}.desktop-nav a:hover{color:var(--teal)}.icon-button:hover{background:#f5f7fa}.campaign-select:hover{background:#fff}.campaign-visual:hover img,.feature-campaign-image:hover img{transform:scale(1.035)}.event-button:hover{background:#f5f7fa}}
@media(min-width:1500px){.hero{min-height:640px}.hero-content{padding-left:100px}}
@media(max-width:1100px){.header-inner{padding:0 28px;gap:22px}.desktop-nav{gap:25px}.context-inner{padding-left:28px;padding-right:28px}.hero-content{padding-left:54px}.hero{min-height:550px}.statement-grid{gap:40px}.feature-campaign-copy{padding:32px}.evidence-grid{gap:40px}.recording-layout{grid-template-columns:1fr}.event-panel{border-left:0;border-top:1px solid var(--line);padding:24px 0 0}.event-list{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 22px;max-height:240px}.comparison-grid{gap:22px}.site-footer{padding:36px 32px;gap:16px}}
@media(max-width:760px){body{font-size:15px}.header-inner{height:66px;padding:0 22px;gap:16px}.brand{font-size:21px}.brand svg{width:26px}.desktop-nav{display:none}.menu-button{display:grid}.header-actions{gap:7px}.demo-label{font-size:11px}.context-inner{padding:10px 22px;align-items:flex-start;gap:8px;font-size:11px}.context-location{display:none}.source-label{gap:6px;flex-wrap:wrap;justify-content:flex-end}.source-divider{display:none}#context-period{display:none}.shell{padding:0 24px}.hero{min-height:630px;align-items:flex-start}.hero-media{object-position:69% center}.hero:after{background:linear-gradient(180deg,rgba(9,19,18,.78),rgba(9,19,18,.42) 58%,rgba(9,19,18,.12))}.hero-content{padding:60px 28px 120px}.hero h1{font-size:40px;line-height:1.27;max-width:9em}.hero p{font-size:14px;max-width:21em;margin-top:22px}.hero .button-row{gap:10px;margin-top:28px}.hero-index{bottom:20px;right:24px;font-size:11px}.button{font-size:13px;padding:11px 18px;min-height:44px}.section{padding:55px 0}.section-heading{margin-bottom:25px;gap:16px;align-items:flex-start}.section-heading h2{font-size:28px}.section-heading p{font-size:13px}.section-heading>.text-link{font-size:12px;white-space:nowrap}.statement-grid{display:block}.statement-intro h2{font-size:28px;max-width:none}.statement-intro p{font-size:13px;margin-top:15px}.statement-result{border:0;padding:30px 0 0;margin-top:26px;border-top:1px solid var(--line)}.main-result strong{font-size:53px}.main-result span{font-size:13px}.stat-row{gap:36px}.stat strong{font-size:22px}.feature-campaign{display:block}.feature-campaign-image{height:auto;aspect-ratio:1.28}.feature-campaign-copy{padding:30px}.feature-campaign-copy h3{font-size:28px}.evidence-teaser{padding:50px 0}.evidence-grid{display:flex;flex-direction:column;gap:30px;align-items:stretch}.evidence-grid h2{font-size:28px}.evidence-grid p{font-size:13px;max-width:none}.spatial-preview{padding:15px}.page-head{padding:38px 0 28px}.page-head h1{font-size:35px}.page-head p{font-size:13px;margin-top:15px}.page-head-row{display:block}.page-head-row>.button{margin-top:20px}.control-bar{padding:15px 0;gap:12px}.filter-group{gap:10px}.filter-label{font-size:11px}.segmented button{font-size:12px;padding:7px 11px}.comparison-grid{grid-template-columns:1fr;gap:35px;margin-top:28px}.campaign-panel{display:grid;grid-template-columns:110px minmax(0,1fr);gap:0 20px}.campaign-visual{grid-column:1/-1;aspect-ratio:1.6}.campaign-name-row{grid-column:1/-1;margin-top:18px}.campaign-name-row h2{font-size:23px}.campaign-period{grid-column:1/-1}.campaign-rate{grid-column:1/-1;padding:16px 0 10px}.campaign-stats{grid-column:1/-1}.campaign-detail{grid-column:1/-1}.campaign-rate strong{font-size:34px}.verdict{padding:22px;display:block;margin-bottom:34px}.verdict :is(h2,h3){font-size:18px}.verdict p{font-size:12px}.verdict-mark{margin-top:14px}.chart-heading{align-items:flex-start;flex-direction:column}.chart-heading h2{font-size:23px}.chart-heading .segmented{max-width:100%}.chart-section{padding-bottom:45px}.trend-chart{min-height:180px}.camera-grid{gap:24px;grid-template-columns:1fr}.camera-screen{aspect-ratio:1.35}.camera-heading{font-size:13px}.camera-counts{gap:35px}.playback-bar{gap:14px;margin-top:22px}.recording-layout{margin-top:24px;gap:10px}.playback-settings{gap:12px}.event-list{grid-template-columns:1fr 1fr;gap:0 15px;max-height:250px}.event-panel h2{font-size:20px}.quality-strip{grid-template-columns:1fr;gap:20px;margin-bottom:40px}.quality-strip div{font-size:12px}.upload-grid{grid-template-columns:1fr;gap:14px}.local-import{padding:22px}.local-import h2{font-size:20px}.local-controls{font-size:12px;gap:12px}.analysis-tabs{gap:24px;margin-top:8px}.analysis-summary{grid-template-columns:1fr 1fr;gap:28px 16px}.analysis-summary .stat:nth-child(3){border:0;padding-left:0}.analysis-summary .stat strong{font-size:26px}.provenance-list{grid-template-columns:1fr;gap:30px}.provenance-list p{font-size:13px}.site-footer{padding:32px 24px;display:grid;grid-template-columns:1fr 1fr;gap:13px}.site-footer p{text-align:right;font-size:11px}.site-footer>span{margin:0;font-size:11px}.site-footer .text-link{justify-self:end;font-size:11px}dialog{padding:24px}.dialog-top h2{font-size:22px}.data-note{font-size:11px}}
@media(max-width:360px){.hero h1{font-size:35px}.header-inner{padding:0 16px}.context-inner{padding:9px 16px}.shell{padding:0 20px}.hero-content{padding-left:24px;padding-right:24px}.hero .button{padding:10px 15px}.demo-label{display:none}.campaign-stats dd{font-size:16px}.event-list{grid-template-columns:1fr}.main-result strong{font-size:47px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
@media(prefers-reduced-transparency:reduce){.site-header{background:var(--page)}dialog::backdrop{backdrop-filter:none}}
@media print{.site-header,.context-bar,.site-footer,.control-bar,.button,.toast,.analysis-tabs,.text-link{display:none!important}.shell{padding:0}.page-head{padding-top:0}.analysis-body{padding:0}.table-wrap{overflow:visible}th,td{padding:10px}.campaign-visual{height:100px}body{background:white}.section{padding:25px 0}}

.mobile-break{display:none}@media(max-width:760px){.mobile-break{display:block}}@media(pointer:coarse){.segmented button,.campaign-select,.text-link{min-height:44px}}

/* Bilingual composition. Preserve the approved photographs, palette, and hierarchy. */
:root {
  --font-latin: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-chinese: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --body-leading: 1.6;
}
html[lang="en"] { font-family: var(--font-latin); --body-leading: 1.6; }
html[lang="zh-CN"] { font-family: var(--font-chinese); --body-leading: 1.75; }
body { font-size: 16px; line-height: var(--body-leading); }
p { line-height: inherit; }
html[lang="en"] :is(h1,h2,h3) { hyphens: none; overflow-wrap: normal; }
html[lang="zh-CN"] :is(h1,h2,h3) { letter-spacing: -.025em; }
:is(h1,h2,h3,p,button,a,label,th,td,.local-status,.inline-note) { overflow-wrap: anywhere; }
:is(.shell,.header-inner,.header-actions,.context-inner,.context-store,.source-label,.page-head-row,.section-heading,.filter-group,.chart-heading,.campaign-name-row,.camera-heading,.camera-counts,.local-controls,.preview-foot,.site-footer) > * { min-width: 0; }
:is(.statement-intro,.statement-result,.feature-campaign-copy,.evidence-grid > div,.page-head-row > div,.chart-heading > div) { min-width: 0; }

/* Navigation remains usable with English labels, expanded copy, and browser zoom. */
.header-inner { height: auto; min-height: 78px; padding-block: 12px; gap: 24px; }
.desktop-nav { gap: clamp(18px,2.3vw,34px); align-self: stretch; }
.desktop-nav a { min-height: 44px; height: auto; text-align: center; }
.header-actions { flex-shrink: 0; gap: 12px; }
.language-select {
  font-family: var(--font-latin); font-size: 16px; line-height: 1.4;
  color: var(--ink); background: transparent; border: 1px solid #c9d0dc;
  border-radius: 5px; min-height: 44px; max-width: 11rem;
  padding: 8px 6px 8px 10px; cursor: pointer;
}
.context-inner { align-items: flex-start; flex-wrap: wrap; }
.context-store { flex-wrap: wrap; }
.context-store svg { flex-shrink: 0; }
.source-label { flex-wrap: wrap; }
.source-label > span { overflow-wrap: anywhere; }

/* Hero height follows translated copy; the illustration credit occupies real space. */
.hero { display: flex; flex-direction: column; align-items: stretch; }
.hero-content { padding-bottom: 36px; flex: 1; }
.hero h1 { line-height: 1.2; }
html[lang="zh-CN"] .hero h1 { font-size: 64px; max-width: 9em; }
html[lang="en"] .hero h1 { font-size: 56px; max-width: 18ch; letter-spacing: -.035em; }
.hero h1 br { display: none; }
.hero p { font-size: 16px; line-height: var(--body-leading); max-width: 48ch; }
.hero-index { position: static; align-self: flex-end; margin: 0 48px 26px; max-width: calc(100% - 96px); text-align: right; flex-wrap: wrap; justify-content: flex-end; letter-spacing: .025em; }
.hero-index::before { flex-shrink: 0; }
:is(.statement-intro p,.section-heading p,.feature-campaign-copy p,.evidence-grid p,.page-head p,.provenance-list p) { font-size: 16px; line-height: var(--body-leading); }
html[lang="en"] .statement-intro h2 { max-width: 17ch; }
html[lang="en"] .feature-campaign-copy h3 { max-width: 18ch; }

/* Text-bearing controls grow and wrap rather than truncating translated labels. */
.button { max-width: 100%; text-align: center; white-space: normal; }
.button svg,.text-link svg,.check-box,.verdict-mark svg { flex-shrink: 0; }
.text-link { max-width: 100%; white-space: normal; text-align: left; }
.button-row { align-items: stretch; }
.page-head-row { flex-wrap: wrap; }
.page-head-row > div { flex: 1 1 30rem; }
.page-head-row .button {
  flex: 0 1 auto; min-inline-size: min(100%, 9rem);
  overflow-wrap: normal; word-break: normal;
}
.segmented { max-width: 100%; flex-wrap: wrap; }
.segmented button { white-space: normal; overflow-wrap: anywhere; flex: 1 1 auto; }
.filter-group { max-width: 100%; }
.select { min-width: 0; }
.campaign-name-row { flex-wrap: wrap; }
.best-label { max-width: 100%; }
.campaign-select { max-width: calc(100% - 28px); text-align: left; }
.campaign-rate { gap: 16px; }
.campaign-rate strong { flex-shrink: 0; }
.campaign-stats { grid-template-columns: repeat(3,minmax(0,1fr)); }
.main-result,.stat-row,.camera-counts,.camera-counts > div,.preview-foot { flex-wrap: wrap; }
.verdict-mark { white-space: normal; align-self: flex-start; }
.check-control { min-height: 44px; align-items: center; }
.check-control input { flex-shrink: 0; }
.camera-heading { flex-wrap: wrap; }
/* A source caption occupies its own row, never covering diagram labels or footage. */
.camera-screen { aspect-ratio: auto; }
.camera-screen > svg { display: block; width: 100%; height: auto; }
.camera-screen > video { display: block; width: 100%; height: auto; aspect-ratio: 1.24; object-fit: contain; }
.camera-screen > .empty-state { height: auto; min-height: 220px; aspect-ratio: 1.24; }
.camera-screen .screen-label {
  position: static; display: block; border-radius: 0; padding: 8px 10px;
  background: #f5f7fa; color: #263247; border-top: 1px solid #d4deee;
  font-size: 12px; line-height: var(--body-leading); overflow-wrap: anywhere;
}
.local-import,.upload-label { min-width: 0; }
.upload-label input { width: 100%; min-width: 0; }
.upload-label .sample-caption,.file-name,.local-status { overflow-wrap: anywhere; word-break: normal; }
.local-controls label { max-width: 100%; }
.local-controls .number-input { flex: 0 0 88px; }
.event-time { flex-shrink: 0; width: auto; min-width: 33px; }
.event-button > span:last-child { min-width: 0; }
.analysis-tabs { flex-wrap: wrap; overflow: visible; gap: 8px 28px; }
.analysis-tabs button { white-space: normal; text-align: left; }
.stat strong,.main-result strong,.campaign-rate strong,.campaign-stats dd,.camera-counts strong,.event-time,.time-labels,.num,.nowrap { font-variant-numeric: tabular-nums; }

/* Wide data regions scroll locally. Only values explicitly marked numeric stay on one line. */
.table-wrap { width: 100%; max-width: 100%; overscroll-behavior-x: contain; }
table { white-space: normal; min-width: 680px; }
th,td { vertical-align: top; white-space: normal; overflow-wrap: normal; }
th { min-width: 7.5em; line-height: 1.5; }
th:first-child,td:first-child { min-width: 11em; }
th.num,th[data-numeric] { white-space: normal; text-align: right; min-width: 7em; }
td.num,td[data-numeric] { white-space: nowrap; text-align: right; min-width: 7em; }
.nowrap { white-space: nowrap; }
.trend-chart { max-width: 100%; }

@media (max-width: 1100px) {
  .header-inner { gap: 18px; }
  .header-actions { gap: 8px; }
  .desktop-nav { gap: 18px; }
  .demo-label { display: none; }
}
@media (max-width: 960px) {
  .desktop-nav { display: none; }
  .menu-button { display: grid; }
  .header-inner { min-height: 70px; }
  .mobile-nav a { overflow-wrap: anywhere; }
  .section-heading { flex-wrap: wrap; }
  .statement-grid { gap: 36px; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .header-inner { min-height: 66px; padding-block: 10px; gap: 12px; }
  .header-actions { gap: 8px; }
  .context-inner { align-items: flex-start; }
  .context-store { flex: 1 1 12em; }
  .source-label { flex: 1 1 11em; justify-content: flex-start; }
  .hero { min-height: 630px; }
  .hero-content { padding: 52px 28px 36px; }
  html[lang="zh-CN"] .hero h1 { font-size: 38px; max-width: 9em; }
  html[lang="en"] .hero h1 { font-size: 36px; max-width: 18ch; }
  .hero p { font-size: 16px; max-width: 34ch; }
  .hero-index { margin: 0 24px 24px; max-width: calc(100% - 48px); }
  :is(.statement-intro p,.section-heading p,.feature-campaign-copy p,.evidence-grid p,.page-head p,.provenance-list p) { font-size: 16px; }
  html[lang="en"] .statement-intro h2 { max-width: 20ch; }
  .section-heading > .text-link { white-space: normal; }
  .button-row { gap: 10px; }
  .feature-campaign-copy { padding: 28px; }
  .filter-group { align-items: flex-start; }
  .filter-group .segmented { flex-wrap: wrap; }
  .select,.number-input,.upload-label input { font-size: 16px; }
  .campaign-rate > span { max-width: 60%; }
  .campaign-stats { gap: 14px; }
  .verdict-mark { margin-top: 14px; }
  .stat-row { gap: 24px; }
  .camera-counts { gap: 16px 24px; }
  .camera-screen { aspect-ratio: auto; }
  .camera-screen > video,.camera-screen > .empty-state { aspect-ratio: 1.35; }
  .playback-settings { align-items: flex-start; }
  .event-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .analysis-tabs { gap: 8px 24px; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer p { text-align: left; }
  .site-footer .text-link { justify-self: start; }
  .site-footer > span { margin-left: 0; }
  .dialog-top { align-items: flex-start; }
  .dialog-top .icon-button { flex-shrink: 0; }
}
@media (max-width: 420px) {
  .header-inner { padding-inline: 12px; gap: 8px; }
  .brand { font-size: 18px; gap: 7px; letter-spacing: -.7px; }
  .brand svg { width: 23px; height: 23px; }
  .header-actions { gap: 4px; }
  .language-select { width: 108px; max-width: 108px; padding-left: 5px; padding-right: 0; }
  .menu-button { width: 40px; min-width: 40px; }
  .demo-label { display: none; }
  .hero-content { padding-inline: 24px; }
  .hero .button { flex: 1 1 100%; }
  .hero-index::before { width: 24px; }
  .campaign-name-row { align-items: flex-start; }
  .chart-heading .filter-group { width: 100%; }
  .chart-heading .select { max-width: 100%; }
  .event-list { grid-template-columns: 1fr; }
  .local-import { padding: 18px; }
  .local-controls { gap: 10px; }
  .analysis-summary .stat strong { font-size: 24px; }
  dialog { width: calc(100% - 24px); padding: 20px; }
}

/* Classroom workflow: the conclusion leads; media setup explains its state. */
.control-bar + .verdict {
  margin-block: 28px 0;
  padding: 26px 30px;
}
.control-bar + .verdict > div { max-width: 70ch; min-width: 0; }
.control-bar + .verdict p { font-size: 14px; line-height: var(--body-leading); }
.local-import {
  padding: 30px 0 0; margin: 26px 0 36px;
  background: transparent; border-radius: 0;
  border-top: 1px solid var(--line);
}
.local-import h2 { font-size: 26px; line-height: 1.35; letter-spacing: -.025em; }
.local-import > p { max-width: 72ch; font-size: 16px; line-height: var(--body-leading); margin: 12px 0 24px; }
.upload-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px; }
.upload-slot {
  display: flex; flex-direction: column; min-width: 0;
  padding: 24px; border: 1px solid #cbd3e2; border-radius: 12px;
  background: var(--surface);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.upload-slot-top { display: flex; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; gap: 10px 16px; }
.upload-slot-top > :first-child { min-width: 0; font-size: 18px; line-height: 1.45; font-weight: 550; }
.file-status {
  display: inline-flex; align-items: center; max-width: 100%;
  min-height: 28px; padding: 3px 8px; border-radius: 4px;
  color: #666d7a; background: #f5f7fa;
  font-size: 13px; line-height: 1.5; overflow-wrap: anywhere;
}
.file-status[data-status="ready"] { color: #11775b; background: #f5f7fa; }
.file-status[data-status="reading"],.file-status[data-status="loading"] { color: #9a650c; background: #fff4df; }
.file-status[data-status="error"] { color: #ba4050; background: #fceef0; }
.upload-name {
  margin-block: 22px 24px; font-size: 16px; line-height: var(--body-leading);
  overflow-wrap: anywhere; word-break: normal;
}
.upload-name.is-empty { color: var(--secondary); }
.upload-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 16px; margin-top: auto; }
.upload-actions .button { min-height: 44px; padding: 10px 16px; font-size: 14px; }
.upload-hint { flex: 1 1 12em; min-width: 0; color: var(--secondary); font-size: 14px; line-height: 1.6; }
.upload-slot.is-dragging { border-color: var(--teal); background: #f5f7fa; outline: 2px solid var(--teal); outline-offset: 3px; }
.upload-slot:focus-within { border-color: var(--teal); }
.alignment-workspace {
  display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.15fr);
  align-items: start; gap: 36px; margin-top: 30px;
  padding-top: 28px; border-top: 1px solid var(--line);
}
.alignment-settings,.alignment-preview { min-width: 0; }
.alignment-settings h3 { font-size: 20px; line-height: 1.4; letter-spacing: -.02em; }
.alignment-settings .local-controls { margin-top: 18px; gap: 10px 14px; font-size: 16px; }
.alignment-settings .number-input { min-height: 44px; font-size: 16px; }
.alignment-settings .local-controls > span { color: var(--secondary); font-size: 14px; line-height: 1.6; }
.local-import .offset-explanation { max-width: 48ch; color: var(--secondary); font-size: 14px; line-height: 1.65; margin: 14px 0 0; }
.alignment-preview { padding-top: 3px; --alignment-label-width: 5.5rem; --alignment-label-gap: 16px; }
.alignment-track-grid { display: grid; gap: 18px; }
.alignment-row { display: grid; grid-template-columns: var(--alignment-label-width) minmax(0,1fr); align-items: center; gap: var(--alignment-label-gap); min-width: 0; }
.alignment-label { font-size: 14px; line-height: 1.5; color: var(--secondary); overflow-wrap: anywhere; }
.alignment-rail { position: relative; height: 12px; border-radius: 3px; background: #f5f7fa; min-width: 0; }
.alignment-clip { position: absolute; top: 0; height: 100%; border-radius: 3px; background: #8798b3; min-width: 0; }
.alignment-row:nth-child(2) .alignment-clip { background: var(--teal); }
.alignment-common {
  position: relative; margin: 18px 0 0 calc(var(--alignment-label-width) + var(--alignment-label-gap));
  padding-top: 14px; color: #0c7884; font-size: 14px; line-height: 1.6;
  font-variant-numeric: tabular-nums; overflow-wrap: anywhere;
}
.alignment-common::before {
  content: ""; position: absolute; top: 0;
  left: var(--common-start,0%); width: var(--common-width,0%);
  height: 4px; border-radius: 2px; background: var(--teal);
}
.alignment-legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 14px; color: var(--secondary); font-size: 13px; line-height: 1.6; }
.alignment-legend > * { min-width: 0; }
.alignment-legend i { display: inline-block; width: 14px; height: 4px; margin-inline-end: 6px; vertical-align: middle; border-radius: 1px; background: #8798b3; }
.alignment-legend > :nth-child(2) i { background: var(--teal); }
.alignment-empty { min-height: 116px; display: flex; align-items: center; margin: 0; padding: 8px 0; color: var(--secondary); font-size: 16px; line-height: var(--body-leading); max-width: 48ch; }
.local-import .local-status { margin: 24px 0 0; font-size: 14px; line-height: var(--body-leading); color: #52627d; }
.event-navigation {
  display: grid; grid-template-columns: auto minmax(0,1fr) auto;
  align-items: center; gap: 16px; margin: 20px 0 0;
  padding: 0 0 22px; border-bottom: 1px solid var(--line);
}
.event-navigation button {
  min-height: 44px; max-width: 100%; padding: 10px 14px;
  border: 1px solid #c5cfdf; border-radius: 5px;
  background: var(--surface); color: var(--ink); font: inherit;
  font-size: 14px; line-height: 1.5; white-space: normal;
  transition: background-color .18s var(--ease), border-color .18s var(--ease);
}
.event-navigation button:disabled { cursor: default; color: #697181; background: #f5f7fa; border-color: #e1e5ec; }
#active-event-label { min-width: 0; text-align: center; font-size: 14px; line-height: 1.6; color: var(--secondary); overflow-wrap: anywhere; }
#active-event-label strong { color: var(--ink); font-weight: 550; }
.event-navigation button:focus-visible,.upload-actions button:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; }
@media (hover:hover) and (pointer:fine) {
  .upload-slot:has(.upload-actions button:hover) { border-color: #8292ac; }
  .event-navigation button:not(:disabled):hover { background: #f5f7fa; border-color: #8798b3; }
}
@media (max-width: 960px) {
  .alignment-workspace { grid-template-columns: 1fr; gap: 24px; }
  .alignment-preview { max-width: 42rem; width: 100%; }
}
@media (max-width: 760px) {
  .control-bar + .verdict { padding: 22px; margin-top: 22px; }
  .upload-grid { grid-template-columns: minmax(0,1fr); gap: 16px; }
  .upload-slot { padding: 22px; }
  .local-import { padding: 26px 0 0; margin-bottom: 28px; }
  .local-import h2 { font-size: 24px; }
  .alignment-workspace { gap: 22px; padding-top: 24px; margin-top: 26px; }
  .event-navigation { gap: 10px; }
  .event-navigation button { padding: 10px; }
}
@media (max-width: 420px) {
  .upload-slot { padding: 18px; }
  .upload-slot-top { gap: 10px; }
  .upload-name { margin-block: 18px 20px; }
  .upload-actions { align-items: flex-start; }
  .upload-hint { flex-basis: 100%; }
  .alignment-row { grid-template-columns: minmax(0,1fr); gap: 7px; }
  .alignment-track-grid { gap: 16px; }
  .alignment-common { margin-left: 0; }
  .event-navigation { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 12px; }
  #active-event-label { grid-row: 1; grid-column: 1 / -1; text-align: left; }
}

.event-markers { display: block; width: 100%; height: 14px; margin-top: -3px; }