/* 备份服务只开放 /backup/ 下的三个静态文件。
 * 此处使用官网 Organic 配色；verify-backup.mjs 将两种主题逐字钉到
 * contracts/design-tokens.json 的生成物，防止独立服务与官网悄悄分叉。 */
:root {
  color-scheme: dark;
  --backup-bg: #211b13;
  --backup-surface: #2a241a;
  --backup-hover: #37301f;
  --backup-border: #463d28;
  --backup-control-border: #a99d87;
  --backup-text: #f1e8d6;
  --backup-muted: #c9bfae;
  --backup-dim: #a99d87;
  --backup-accent: #e09659;
  --backup-link: #ffc89d;
  --backup-primary: #e09659;
  --backup-on-primary: #211b13;
  --backup-danger: #ff6961;
  --backup-focus: #eeab72;
  --backup-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --backup-bg: #f5ead8;
    --backup-surface: #f9f4ed;
    --backup-hover: #eee7db;
    --backup-border: #dcd3c4;
    --backup-control-border: #82796a;
    --backup-text: #201e1d;
    --backup-muted: #474238;
    --backup-dim: #645c50;
    --backup-accent: #c67139;
    --backup-link: #8c491a;
    --backup-primary: #8c491a;
    --backup-on-primary: #ffffff;
    --backup-danger: #bc2d0e;
    --backup-focus: #b2622d;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; color: var(--backup-text); background: var(--backup-bg); font: 15px/1.65 var(--backup-font); -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .6; }
a { color: var(--backup-link); }
:focus-visible { outline: 3px solid var(--backup-focus); outline-offset: 4px; }
h1, h2, p { margin: 0; }
h1 { line-height: 1.25; letter-spacing: -.04em; }
.wrap { width: min(1180px, 100%); margin-inline: auto; padding-inline: 36px; }
.topbar { border-bottom: 1px solid var(--backup-border); }
.topbar-inner { display: flex; align-items: center; min-height: 88px; gap: 26px; }
.brand { color: var(--backup-text); display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 21px; letter-spacing: -.035em; font-weight: 750; white-space: nowrap; }
.brand-mark { width: 26px; height: 26px; border: 7px solid var(--backup-accent); border-radius: 8px; }
.header-label { color: var(--backup-muted); border-left: 1px solid var(--backup-border); padding-left: 26px; font-size: 13px; }
.topbar .button { margin-left: auto; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 2; background: var(--backup-surface); padding: 12px 20px; }
.skip-link:focus { top: 12px; }
.session-status { color: var(--backup-muted); padding-block: 18px; }
.session-status:empty { display: none; }
.login-layout { min-height: 660px; display: grid; grid-template-columns: 1.16fr 1fr; align-items: center; gap: 90px; padding-block: 60px 76px; }
.eyebrow { color: var(--backup-link); font-size: 11px; letter-spacing: .16em; font-weight: 700; margin-bottom: 20px; overflow-wrap: anywhere; }
.intro h1 { font-size: clamp(36px, 4.3vw, 52px); font-weight: 680; line-height: 1.3; }
.intro-copy { color: var(--backup-muted); font-size: 17px; margin-top: 25px; line-height: 1.9; }
.intro-note { display: flex; gap: 16px; font-size: 13px; color: var(--backup-muted); max-width: 400px; margin-top: 44px; }
.note-line { width: 3px; flex: 0 0 3px; background: var(--backup-accent); border-radius: 2px; }
.timing-note { color: var(--backup-dim); font-size: 12px; max-width: 400px; margin-top: 16px; }
.login-card { padding: 35px 34px; background: var(--backup-surface); border: 1px solid var(--backup-border); border-radius: 20px; }
.card-kicker { display: block; color: var(--backup-dim); font-size: 12px; margin-bottom: 5px; }
.login-card h2 { font-size: 25px; font-weight: 650; letter-spacing: -.03em; }
.login-description { font-size: 13px; margin-top: 6px; margin-bottom: 27px; }
.muted { color: var(--backup-muted); }
.small { font-size: 12px; }
.login-card label { display: block; font-size: 13px; font-weight: 600; margin-block: 17px 7px; }
.login-card input { width: 100%; background: var(--backup-bg); border: 1px solid var(--backup-control-border); border-radius: 9px; padding: 12px 14px; color: var(--backup-text); min-height: 48px; }
.login-card input[aria-invalid="true"] { border-color: var(--backup-danger); }
.error-message { color: var(--backup-danger); font-size: 13px; margin-block: 12px; }
.error-message:empty { margin-block: 22px 0; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 18px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 9px; font-size: 13px; font-weight: 600; text-decoration: none; transition: background-color .15s; }
.button-primary { width: 100%; min-height: 48px; justify-content: space-between; color: var(--backup-on-primary); background: var(--backup-primary); }
.button-primary:hover:not(:disabled) { filter: brightness(1.06); }
.button-secondary { color: var(--backup-text); border-color: var(--backup-control-border); background: var(--backup-surface); }
.button-quiet { color: var(--backup-muted); background: transparent; }
.button-quiet:hover:not(:disabled), .button-secondary:hover:not(:disabled) { background: var(--backup-hover); }
.login-footnote { font-size: 11px; color: var(--backup-dim); border-top: 1px solid var(--backup-border); margin-top: 26px; padding-top: 20px; }
.retry-logout { width: 100%; margin-top: 15px; }
.library { padding-block: 52px 34px; min-height: calc(100vh - 210px); }
.library-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.library-heading .eyebrow { margin-bottom: 9px; letter-spacing: .08em; }
.library-heading h1 { font-size: 38px; font-weight: 680; margin-bottom: 10px; }
.library-heading p.muted { font-size: 13px; }
.library-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin: 31px 0 34px; border: 1px solid var(--backup-border); border-radius: 13px; background: var(--backup-surface); padding-block: 23px; }
.library-stats div { padding-inline: 25px; }
.library-stats div + div { border-left: 1px solid var(--backup-border); }
.library-stats dt { font-size: 12px; color: var(--backup-muted); }
.library-stats dd { font-size: 26px; line-height: 1.4; font-weight: 550; margin: 4px 0 0; overflow-wrap: anywhere; }
.library-toolbar { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; color: var(--backup-muted); margin-bottom: 16px; }
.download-hint { color: var(--backup-dim); }
.notice, .error-notice { padding: 15px 18px; border: 1px solid var(--backup-border); border-radius: 10px; background: var(--backup-surface); font-size: 13px; margin-block: 16px; }
.error-notice { color: var(--backup-danger); }
.error-notice .button { margin-top: 12px; }
.photo-grid { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.photo-card { min-width: 0; border: 1px solid var(--backup-border); border-radius: 13px; overflow: hidden; background: var(--backup-surface); }
.photo-preview { position: relative; aspect-ratio: 1; display: flex; align-items: center; justify-content: center; background: var(--backup-hover); overflow: hidden; }
.photo-preview img { display: block; width: 100%; height: 100%; object-fit: cover; }
.preview-placeholder { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 18px; text-align: center; color: var(--backup-muted); }
.preview-placeholder strong { font-size: 20px; letter-spacing: .07em; font-weight: 550; }
.preview-placeholder span { font-size: 11px; }
.photo-info { padding: 14px; }
.photo-name { margin: 0; font-size: 13px; font-weight: 600; line-height: 1.6; overflow-wrap: anywhere; }
.photo-meta { font-size: 11px; color: var(--backup-dim); margin-top: 6px; }
.photo-time { font-size: 11px; color: var(--backup-dim); margin-top: 3px; }
.download-button { width: 100%; margin-top: 12px; min-height: 42px; font-size: 12px; }
.photo-error { color: var(--backup-danger); margin-top: 8px; font-size: 11px; overflow-wrap: anywhere; }
.empty-state { text-align: center; border: 1px dashed var(--backup-control-border); border-radius: 14px; padding: 46px 25px; margin-block: 18px; }
.empty-frame { display: block; position: relative; width: 48px; height: 42px; margin: 0 auto 22px; border: 2px solid var(--backup-control-border); border-radius: 8px; transform: rotate(-6deg); }
.empty-frame::after { content: ""; display: block; position: absolute; width: 38px; height: 32px; top: 6px; left: 8px; background: var(--backup-bg); border: 2px solid var(--backup-control-border); border-radius: 7px; transform: rotate(12deg); }
.empty-state h2 { font-size: 21px; font-weight: 600; margin-bottom: 13px; }
.empty-state > p { color: var(--backup-muted); font-size: 13px; }
.empty-state .small { margin-top: 16px; font-size: 12px; }
.pagination { text-align: center; margin-block: 27px; }
.pagination p { margin-top: 13px; }
.library-footnote { border-top: 1px solid var(--backup-border); padding-top: 23px; color: var(--backup-dim); font-size: 11px; }
.library-footnote p + p { margin-top: 6px; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 92px; border-top: 1px solid var(--backup-border); font-size: 11px; color: var(--backup-dim); }
@media (max-width: 960px) {
  .login-layout { gap: 45px; }
  .login-card { padding: 28px; }
  .photo-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
}
@media (max-width: 720px) {
  .wrap { padding-inline: 22px; }
  .topbar-inner { min-height: 74px; gap: 16px; }
  .brand { font-size: 19px; }
  .header-label { padding-left: 16px; }
  .topbar .button { padding-inline: 8px; font-size: 12px; }
  .login-layout { grid-template-columns: 1fr; gap: 32px; padding-block: 40px; min-height: auto; }
  .intro h1 { font-size: 38px; }
  .intro-copy { margin-top: 18px; font-size: 15px; }
  .intro-note { margin-top: 24px; max-width: none; }
  .timing-note { max-width: none; }
  .wide-break { display: none; }
  .login-card { padding: 27px 24px; }
  .library { padding-top: 32px; }
  .library-heading h1 { font-size: 30px; }
  .library-heading .button { padding-inline: 12px; }
  .library-stats { padding-block: 18px; margin-block: 26px; }
  .library-stats div { padding-inline: 14px; }
  .library-stats dd { font-size: 21px; }
  .library-stats dt { font-size: 11px; }
  .library-toolbar { flex-direction: column; gap: 4px; }
  .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .photo-info { padding: 12px; }
  .photo-name { font-size: 12px; }
  .footer { min-height: 85px; }
}
@media (max-width: 390px) {
  .wrap { padding-inline: 16px; }
  .header-label { display: none; }
  .library-stats div { padding-inline: 10px; }
  .library-stats dd { font-size: 19px; }
  .photo-info { padding: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  body { display: none; }
}