:root {
  color-scheme: light;
  --canvas: #f3f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --ink: #172033;
  --muted: #667085;
  --line: #d8e2ef;
  --line-strong: #b9c9dc;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #dbeafe;
  --success: #16825d;
  --success-soft: #dcfce7;
  --danger: #d92d20;
  --danger-soft: #fff0ef;
  --shadow-sm: 0 1px 2px rgba(23, 32, 51, .05);
  --shadow-md: 0 14px 40px rgba(61, 88, 122, .10);
  --radius-sm: 9px;
  --radius-md: 14px;
  --radius-lg: 22px;
  font-family: "Segoe UI Variable Text", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { background: var(--canvas); color: var(--ink); }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: var(--primary); text-decoration: none; }
h1, h2, p { margin-top: 0; }
h1, h2, .brand strong { font-family: "Segoe UI Variable Display", "Segoe UI", "PingFang SC", sans-serif; }
h1 { margin-bottom: 10px; font-size: clamp(1.9rem, 4vw, 2.7rem); letter-spacing: -.035em; line-height: 1.12; }
h2 { margin-bottom: 8px; font-size: 1.15rem; letter-spacing: -.015em; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.text-muted { color: var(--muted); line-height: 1.65; }
.eyebrow { margin-bottom: 8px; color: var(--primary); font: 700 .72rem/1.2 "Cascadia Mono", "SFMono-Regular", monospace; letter-spacing: .12em; }

.app-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(216, 226, 239, .9); background: rgba(255, 255, 255, .88); backdrop-filter: blur(18px); }
.app-header__inner { display: flex; align-items: center; justify-content: space-between; width: min(1180px, calc(100% - 36px)); min-height: 70px; margin: auto; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); }
.brand__mark { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 12px 5px 12px 5px; background: var(--primary); color: white; font-weight: 800; box-shadow: 0 8px 18px rgba(37, 99, 235, .22); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: .98rem; letter-spacing: -.02em; }
.brand small { margin-top: 1px; color: var(--muted); font-size: .72rem; }
.brand--large .brand__mark { width: 46px; height: 46px; font-size: 1.15rem; }
.brand--large strong { font-size: 1.1rem; }
.app-nav { display: flex; align-items: center; gap: 10px; }
.app-nav form { margin: 0; }
.app-nav > a:not(.button) { padding: 10px 8px; color: var(--muted); font-size: .9rem; font-weight: 650; }

.app-shell { width: min(1180px, calc(100% - 36px)); margin: auto; padding: 48px 0 80px; }
.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.page-heading .text-muted { margin-bottom: 0; }
.back-link { display: inline-block; margin-bottom: 22px; color: var(--muted); font-size: .9rem; font-weight: 650; }
.panel { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-sm); }
.panel--flush { padding: 0; overflow: hidden; }
.form-stack { display: grid; gap: 18px; }
.two-column, .metric-grid { display: grid; gap: 18px; margin-bottom: 20px; }
.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.metric-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: 8px; padding: 10px 17px; border: 1px solid transparent; border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); font-weight: 700; line-height: 1; cursor: pointer; transition: background-color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease; }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button:disabled { cursor: not-allowed; opacity: .55; transform: none; }
.button--primary { background: var(--primary); color: white; box-shadow: 0 7px 16px rgba(37, 99, 235, .18); }
.button--primary:hover { background: var(--primary-hover); }
.button--soft { border-color: #bfd5ff; background: #eff6ff; color: #1d4ed8; }
.button--soft:hover { background: var(--primary-soft); }
.button--ghost { border-color: var(--line); background: var(--surface); color: var(--muted); }
.button--ghost:hover { border-color: var(--line-strong); color: var(--ink); }
.button--danger { background: var(--danger); color: white; }
.button--danger:hover { background: #b42318; }
.button--large { width: 100%; min-height: 50px; }
.button--compact { min-height: 44px; padding: 10px 13px; font-size: .86rem; }

.field { display: grid; gap: 8px; color: #344054; font-size: .9rem; font-weight: 700; }
.field small { color: var(--muted); font-weight: 400; }
.field input, .field select, .copy-row input { width: 100%; min-height: 46px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); padding: 10px 13px; outline: none; transition: border-color .15s ease, box-shadow .15s ease; }
.field input:focus, .field select:focus, .copy-row input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37, 99, 235, .11); }
.field-group { display: grid; grid-template-columns: 1fr 100px; gap: 9px; }
.notice { margin-bottom: 20px; padding: 13px 15px; border: 1px solid #b7dfce; border-radius: var(--radius-sm); background: #effcf6; color: #126b4c; }
.notice--error { border-color: #fecaca; background: var(--danger-soft); color: #a82118; }

.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 17px 20px; border-bottom: 1px solid #e8eef5; text-align: left; white-space: nowrap; }
.data-table th { background: var(--surface-soft); color: var(--muted); font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: #fbfdff; }
.file-cell { display: flex; align-items: center; gap: 12px; min-width: 230px; }
.file-cell__icon { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid #c8dcff; border-radius: 11px; background: #eff6ff; color: var(--primary); font: 750 .66rem "Cascadia Mono", monospace; }
.media-kind-pill { display: inline-flex; min-width: 42px; min-height: 28px; align-items: center; justify-content: center; padding: 5px 8px; border: 1px solid #bfdbfe; border-radius: 999px; background: #eff6ff; color: #1d4ed8; font: 750 .66rem/1 "Cascadia Mono", "SFMono-Regular", monospace; letter-spacing: .04em; }
.media-kind-pill--video { border-color: #a5b4fc; background: #eef2ff; color: #4338ca; }
.file-cell strong, .file-cell small { display: block; max-width: 300px; overflow: hidden; text-overflow: ellipsis; }
.file-cell small { margin-top: 4px; color: var(--muted); font: .72rem "Cascadia Mono", monospace; }
.data-value { color: #475467; font: .82rem "Cascadia Mono", "SFMono-Regular", monospace; }
.table-action { text-align: right !important; }
.status-pill { display: inline-flex; align-items: center; gap: 7px; padding: 6px 10px; border-radius: 999px; font-size: .78rem; font-weight: 750; }
.status-pill::before { width: 6px; height: 6px; border-radius: 50%; background: currentColor; content: ""; }
.status-pill--active { background: var(--success-soft); color: var(--success); }
.status-pill--expired { background: #f2f4f7; color: #667085; }
.empty-state { display: grid; justify-items: center; padding: 76px 24px; text-align: center; }
.empty-state__icon { display: grid; width: 58px; height: 58px; margin-bottom: 18px; place-items: center; border: 1px dashed #9fc0fb; border-radius: 18px; background: #eff6ff; color: var(--primary); font-size: 1.7rem; }
.empty-state p { color: var(--muted); }

.login-page { min-height: 100vh; background-color: var(--canvas); background-image: linear-gradient(rgba(172, 195, 222, .18) 1px, transparent 1px), linear-gradient(90deg, rgba(172, 195, 222, .18) 1px, transparent 1px); background-size: 42px 42px; }
.login-shell { min-height: 100vh; }
.login-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(420px, .85fr); min-height: 100vh; }
.login-intro { display: flex; flex-direction: column; justify-content: center; padding: 64px clamp(40px, 8vw, 130px); }
.login-intro > .brand { margin-bottom: clamp(60px, 12vh, 120px); align-self: flex-start; }
.login-intro h1 { max-width: 700px; font-size: clamp(2.5rem, 5.2vw, 5rem); line-height: 1.04; }
.login-intro__copy { max-width: 620px; color: var(--muted); font-size: 1.05rem; line-height: 1.8; }
.feature-list { display: flex; flex-wrap: wrap; gap: 18px 28px; margin: 32px 0 0; padding: 0; list-style: none; color: #475467; font-size: .88rem; }
.feature-list li { display: flex; align-items: center; gap: 8px; }
.feature-list span { color: var(--primary); font: 700 .72rem "Cascadia Mono", monospace; }
.login-panel { display: grid; min-height: 100%; place-items: center; padding: 36px; border-left: 1px solid rgba(216, 226, 239, .8); background: rgba(255, 255, 255, .62); backdrop-filter: blur(12px); }
.login-card { width: min(420px, 100%); padding: 36px; border: 1px solid var(--line); border-radius: 26px; background: var(--surface); box-shadow: var(--shadow-md); }
.login-card h2 { font-size: 1.7rem; }
.login-card form { margin-top: 26px; }

.upload-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); gap: 20px; align-items: start; }
.upload-panel { min-height: 500px; }
.drop-zone { display: grid; min-height: 445px; place-items: center; align-content: center; padding: 34px; border: 1.5px dashed #9fc0f4; border-radius: 17px; background-color: #f7fbff; background-image: linear-gradient(rgba(194, 213, 235, .16) 1px, transparent 1px), linear-gradient(90deg, rgba(194, 213, 235, .16) 1px, transparent 1px); background-size: 28px 28px; text-align: center; }
.drop-zone:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37, 99, 235, .09); }
.drop-zone__icon { display: grid; width: 58px; height: 58px; margin-bottom: 14px; place-items: center; border-radius: 18px; background: var(--primary-soft); color: var(--primary); font-size: 1.8rem; }
.drop-zone p, .drop-zone small { color: var(--muted); }
.drop-zone .button { margin: 10px 0; }
.visually-hidden-input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.selected-file { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px; align-items: center; min-height: 445px; }
.selected-file__preview { width: 100%; min-height: 260px; max-height: 390px; grid-column: 1 / -1; border: 1px solid var(--line); border-radius: 14px; background: var(--canvas); object-fit: contain; }
.selected-file video.selected-file__preview { background: #eaf1fa; }
.selected-file strong { display: block; overflow-wrap: anywhere; }
.rule-panel { position: sticky; top: 92px; display: grid; gap: 22px; }

.share-panel { display: grid; grid-template-columns: .8fr 1.2fr; gap: 30px; align-items: center; margin-bottom: 20px; }
.share-panel p { margin-bottom: 0; }
.copy-row { display: grid; grid-template-columns: 1fr auto; gap: 9px; }
.metric-card { min-width: 0; padding: 21px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow-sm); }
.metric-card span, .metric-card small { display: block; color: var(--muted); }
.metric-card span { margin-bottom: 10px; font-size: .77rem; font-weight: 700; }
.metric-card strong { display: block; overflow: hidden; margin-bottom: 5px; font: 720 1.5rem/1.2 "Segoe UI Variable Display", sans-serif; text-overflow: ellipsis; }
.metric-card__time { font: 700 .83rem/1.5 "Cascadia Mono", monospace !important; }
.metric-card small { font-size: .74rem; }
.records-panel { margin-bottom: 20px; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.section-heading p { margin-bottom: 0; }
.inline-empty { padding: 38px 0 20px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; }
.danger-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 26px; border: 1px solid #fecaca; border-radius: var(--radius-lg); background: var(--danger-soft); }
.danger-panel h2 { color: #9f241a; }
.danger-panel p { margin-bottom: 0; color: #a64b43; }

.public-page { min-height: 100vh; background-color: var(--canvas); background-image: linear-gradient(rgba(172, 195, 222, .2) 1px, transparent 1px), linear-gradient(90deg, rgba(172, 195, 222, .2) 1px, transparent 1px); background-size: 34px 34px; }
.public-shell { display: grid; min-height: 100vh; place-items: center; padding: 24px; }
.public-card { position: relative; width: min(470px, 100%); overflow: hidden; padding: 48px 38px; border: 1px solid var(--line); border-radius: 28px; background: var(--surface); box-shadow: var(--shadow-md); text-align: center; }
.public-card__code { position: absolute; top: 18px; right: 22px; color: #c7d5e6; font: 800 1rem "Cascadia Mono", monospace; }
.public-card__icon { display: grid; width: 68px; height: 68px; margin: 0 auto 22px; place-items: center; border-radius: 21px; background: var(--primary-soft); color: var(--primary); font-size: 2rem; }
.public-card__icon--error { background: var(--danger-soft); color: var(--danger); }
.public-card > p:not(.eyebrow) { color: #475467; line-height: 1.7; }
.public-card > small { display: block; margin-top: 22px; color: var(--muted); line-height: 1.6; }

.viewer-page { width: 100%; height: 100%; overflow: hidden; background: var(--canvas); }
.viewer-main { width: 100%; height: 100dvh; }
.viewer { display: grid; grid-template-rows: 72px minmax(0, 1fr); width: 100%; height: 100%; }
.viewer--video { position: relative; grid-template-rows: minmax(0, 1fr); place-items: center; padding: 24px; overflow: hidden; }
.viewer__header { z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 clamp(16px, 3vw, 34px); border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .92); backdrop-filter: blur(16px); }
.viewer__identity { display: flex; align-items: center; gap: 11px; }
.viewer__identity strong, .viewer__identity span { display: block; }
.viewer__identity strong { font-size: .92rem; }
.viewer__identity div span { margin-top: 2px; color: var(--muted); font-size: .72rem; }
.viewer__mark { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 12px; background: var(--primary-soft); color: var(--primary); }
.viewer__mark svg, .viewer__consent-icon svg { width: 21px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.viewer__privacy { padding: 6px 10px; border: 1px solid #bfd5ff; border-radius: 999px; background: #eff6ff; color: #1d4ed8; font-size: .73rem; font-weight: 750; }
.viewer__stage { position: relative; min-height: 0; overflow: hidden; outline: none; touch-action: none; user-select: none; background-color: #eef4fa; background-image: linear-gradient(45deg, rgba(179, 198, 220, .16) 25%, transparent 25%), linear-gradient(-45deg, rgba(179, 198, 220, .16) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, rgba(179, 198, 220, .16) 75%), linear-gradient(-45deg, transparent 75%, rgba(179, 198, 220, .16) 75%); background-position: 0 0, 0 10px, 10px -10px, -10px 0; background-size: 20px 20px; }
.viewer__stage.is-interactive { cursor: default; }
.viewer__stage.can-pan { cursor: grab; }
.viewer__stage.is-dragging { cursor: grabbing; }
.viewer__image { position: absolute; top: 50%; left: 50%; display: block; max-width: none; max-height: none; transform-origin: center; will-change: transform, filter; transition: filter .28s ease, opacity .28s ease; }
.viewer__image.is-blurred { filter: blur(30px); opacity: .72; }
.viewer__video { display: block; width: min(100%, 1280px); height: min(78vh, 820px); margin: auto; object-fit: contain; background: #eaf1f8; }
.viewer__video.is-blurred { filter: blur(22px); transform: scale(1.025); }
.viewer__consent { position: absolute; z-index: 3; inset: 0; display: grid; place-items: center; padding: 24px; background: rgba(243, 247, 251, .58); backdrop-filter: blur(4px); }
.viewer__consent-card { width: min(410px, 100%); padding: 34px; border: 1px solid rgba(194, 211, 232, .95); border-radius: 24px; background: rgba(255, 255, 255, .96); box-shadow: var(--shadow-md); text-align: center; }
.viewer__consent-icon { display: grid; width: 60px; height: 60px; margin: 0 auto 20px; place-items: center; border-radius: 19px; background: var(--primary-soft); color: var(--primary); }
.viewer__consent-card h1 { font-size: 1.7rem; }
.viewer__consent-card > p:not(.eyebrow) { margin-bottom: 24px; color: var(--muted); line-height: 1.65; }
.viewer__loading { position: absolute; z-index: 4; top: 18px; left: 50%; display: flex; align-items: center; gap: 8px; padding: 8px 12px; transform: translateX(-50%); border: 1px solid var(--line); border-radius: 999px; background: white; color: var(--muted); font-size: .76rem; box-shadow: var(--shadow-sm); }
.viewer__spinner { width: 13px; height: 13px; border: 2px solid #bfdbfe; border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; }
.viewer__toolbar { position: absolute; z-index: 4; bottom: 22px; left: 50%; display: flex; align-items: center; gap: 4px; padding: 7px; transform: translateX(-50%); border: 1px solid rgba(185, 201, 220, .95); border-radius: 15px; background: rgba(255, 255, 255, .96); box-shadow: 0 14px 38px rgba(41, 66, 97, .17); backdrop-filter: blur(16px); }
.tool-button { display: inline-flex; min-width: 44px; height: 44px; align-items: center; justify-content: center; gap: 6px; padding: 0 10px; border: 0; border-radius: 9px; background: transparent; color: #344054; cursor: pointer; }
.tool-button:hover { background: #eff6ff; color: var(--primary); }
.tool-button:disabled { cursor: not-allowed; opacity: .45; }
.tool-button svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.7; }
.tool-button--reset { padding: 0 13px; }
.tool-button--reset span { font-size: .78rem; font-weight: 700; }
.viewer__zoom { min-width: 58px; color: #344054; font: 700 .78rem "Cascadia Mono", monospace; text-align: center; }
.viewer__toolbar-divider { width: 1px; height: 25px; margin: 0 3px; background: var(--line); }
.viewer__error { position: absolute; z-index: 5; inset: 0; display: grid; place-content: center; justify-items: center; padding: 30px; background: var(--canvas); text-align: center; }
.viewer__error > span { display: grid; width: 56px; height: 56px; margin-bottom: 18px; place-items: center; border-radius: 18px; background: var(--danger-soft); color: var(--danger); font-size: 1.5rem; font-weight: 800; }
.viewer__error p { color: var(--muted); }

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, .viewer__stage:focus-visible { outline: 3px solid rgba(37, 99, 235, .28); outline-offset: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .login-layout { grid-template-columns: 1fr; }
  .login-intro { min-height: auto; padding: 40px 28px 18px; }
  .login-intro > .brand { margin-bottom: 54px; }
  .login-intro h1 { font-size: clamp(2.4rem, 10vw, 4rem); }
  .login-panel { padding: 18px 28px 50px; border-left: 0; background: transparent; }
  .upload-layout { grid-template-columns: 1fr; }
  .rule-panel { position: static; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .share-panel { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .app-header__inner, .app-shell { width: min(100% - 24px, 1180px); }
  .app-header__inner { min-height: 64px; }
  .brand small, .app-nav > a:not(.button) { display: none; }
  .app-nav { gap: 6px; }
  .app-nav .button { min-height: 44px; padding: 10px; }
  .app-shell { padding: 30px 0 58px; }
  .page-heading { align-items: flex-start; flex-direction: column; }
  .page-heading > .button { width: 100%; }
  .panel { padding: 20px; border-radius: 17px; }
  .two-column, .metric-grid { grid-template-columns: 1fr; }
  .upload-panel { min-height: auto; }
  .drop-zone { min-height: 340px; padding: 24px; }
  .selected-file { min-height: auto; grid-template-columns: 1fr; }
  .copy-row { grid-template-columns: 1fr; }
  .section-heading, .danger-panel { align-items: stretch; flex-direction: column; }
  .danger-panel .button { width: 100%; }
  .data-table th, .data-table td { padding: 14px 15px; }
  .login-card { padding: 26px 22px; }
  .feature-list { display: grid; }
  .viewer { grid-template-rows: 64px minmax(0, 1fr); }
  .viewer--video { grid-template-rows: minmax(0, 1fr); }
  .viewer__identity div span { display: none; }
  .viewer__privacy { font-size: .68rem; }
  .viewer__consent-card { padding: 28px 22px; }
  .viewer__toolbar { bottom: 12px; width: calc(100% - 20px); justify-content: center; gap: 1px; }
  .tool-button { min-width: 44px; padding: 0 7px; }
  .tool-button--reset span { display: none; }
  .viewer__zoom { min-width: 48px; }
  .viewer__toolbar-divider { margin: 0 1px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}