:root {
  --bg: #0f1220;
  --bg2: #171b2e;
  --card: #1c2138;
  --line: #2a3050;
  --text: #e8ebf5;
  --muted: #9aa3c4;
  --primary: #5b8cff;
  --primary-d: #3f6fe0;
  --danger: #ff5c7a;
  --ok: #35d39a;
  --radius: 14px;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}
.hidden { display: none !important; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

/* top bar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: rgba(15,18,32,.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 17px; letter-spacing: .3px; }
.top-actions { display: flex; align-items: center; gap: 10px; }
/* 后台实时北京时间时钟（顶部居中） */
.adm-clock {
  position: absolute; left: 50%; transform: translateX(-50%);
  font-variant-numeric: tabular-nums; font-size: 13px; color: var(--muted);
  white-space: nowrap; pointer-events: none;
}
.badge { background: var(--bg2); border: 1px solid var(--line); color: var(--muted); padding: 4px 10px; border-radius: 999px; font-size: 13px; }

/* buttons */
.btn {
  appearance: none; border: 1px solid var(--line); background: var(--card); color: var(--text);
  padding: 9px 14px; border-radius: 10px; font-size: 14px; cursor: pointer; transition: .15s;
}
.btn:hover { border-color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-d); }
.btn.danger { color: var(--danger); border-color: transparent; background: rgba(255,92,122,.12); }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* layout */
.container { max-width: 1100px; margin: 0 auto; padding: 16px; }

/* uploader */
.uploader { margin-bottom: 16px; }
/* 上传保留天数提示（红字） */
.retention-note { color: #ff5c7a; font-size: 12.5px; font-weight: 600; margin: 0 0 10px; }
.dropzone {
  border: 2px dashed var(--line); border-radius: var(--radius); padding: 34px 16px; text-align: center;
  background: var(--bg2); cursor: pointer; transition: .15s;
}
.dropzone.drag { border-color: var(--primary); background: rgba(91,140,255,.08); }
.dz-icon { font-size: 30px; opacity: .7; }
.dz-text { margin-top: 8px; font-weight: 600; }
.dz-sub { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* progress */
.progress { margin-top: 12px; }
.progress-bar { height: 10px; background: var(--bg2); border-radius: 999px; overflow: hidden; border: 1px solid var(--line); }
.progress-bar span { display: block; height: 100%; width: 0; background: linear-gradient(90deg,var(--primary),#7aa2ff); transition: width .15s; }
.progress-label { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* toolbar */
.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.toolbar .spacer { flex: 1; }
.sel-count { color: var(--muted); font-size: 13px; }

/* gallery */
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.card.sel { outline: 2px solid var(--primary); }
.card .thumb { aspect-ratio: 1/1; width: 100%; object-fit: cover; display: block; background: #000; cursor: pointer; }
.card .meta { padding: 8px 10px; }
.card .name { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .info { color: var(--muted); font-size: 12px; margin-top: 2px; }
.card .chk { position: absolute; top: 8px; left: 8px; width: 20px; height: 20px; }
.card .ops { position: absolute; top: 6px; right: 6px; display: flex; gap: 6px; }
.card .ops button { width: 30px; height: 30px; border-radius: 8px; border: none; background: rgba(0,0,0,.55); color: #fff; cursor: pointer; font-size: 14px; }
.card .badge-type { position: absolute; bottom: 8px; left: 8px; background: rgba(0,0,0,.55); color: #fff; font-size: 11px; padding: 2px 7px; border-radius: 999px; }

.empty { text-align: center; color: var(--muted); padding: 60px 16px; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.modal-card { background: var(--bg2); border: 1px solid var(--line); border-radius: 16px; padding: 18px; width: 100%; max-width: 420px; max-height: 90vh; overflow: auto; }
.modal-card.wide { max-width: 720px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.modal-head h3 { margin: 0; font-size: 17px; }
.x { background: none; border: none; color: var(--muted); font-size: 24px; cursor: pointer; line-height: 1; }
form label { display: block; margin: 10px 0; font-size: 13px; color: var(--muted); }
form input[type=text], form input[type=tel], form input[type=number] {
  width: 100%; margin-top: 5px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: 15px;
}
form textarea {
  width: 100%; margin-top: 5px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit; resize: vertical;
}
form input[type=datetime-local] {
  width: 100%; margin-top: 5px; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: 14px;
}
form .row { display: flex; gap: 10px; align-items: flex-end; }
form .row .grow { flex: 1; }
.chk { display: flex !important; align-items: center; gap: 8px; color: var(--text) !important; }
.chk input { width: auto !important; margin: 0 !important; }
.devnote { background: rgba(243,186,47,.12); border: 1px solid rgba(243,186,47,.4); color: #f3ba2f; padding: 8px 10px; border-radius: 10px; font-size: 13px; margin-bottom: 10px; }
.share-result { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 14px; }
.share-result .ok { color: var(--ok); margin-bottom: 8px; }
.share-result input { margin-bottom: 8px; }

/* share dialog fields */
.field-label { font-size: 13px; color: var(--muted); margin: 14px 0 6px; font-weight: 600; }
.pw-auto { background: rgba(91,140,255,.10); border: 1px solid rgba(91,140,255,.35); color: var(--text); font-size: 13px; padding: 10px 12px; border-radius: 10px; line-height: 1.5; }
.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.seg-item { flex: 1; min-width: 140px; display: flex; align-items: center; gap: 8px; margin: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; color: var(--text); font-size: 13px; background: var(--bg2); }
.seg-item input { width: auto; margin: 0; }
.seg-item:has(input:checked) { border-color: var(--primary); background: rgba(91,140,255,.10); }

/* validity duration row */
.expire-box { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.expire-text { font-size: 14px; color: var(--text); }
.expire-num { width: 92px !important; margin: 0 !important; }
.unit-seg { flex: 1; min-width: 150px; }
.unit-seg .seg-item { min-width: 0; flex: 1; justify-content: center; padding: 10px 8px; }

/* share result: copy fields */
.copy-field { margin: 12px 0; }
.cf-label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }
.cf-box { display: flex; align-items: stretch; gap: 8px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 4px 4px 4px 12px; }
.cf-val { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); font-size: 13.5px; line-height: 34px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.cf-val.pw { font-size: 19px; font-weight: 700; letter-spacing: 2px; color: var(--ok); }
.cf-copy { flex: none; align-self: center; border: none; background: var(--primary); color: #fff; border-radius: 8px; padding: 8px 14px; font-size: 13px; cursor: pointer; transition: .15s; }
.cf-copy:hover { background: var(--primary-d); }

/* privacy */
.privacy-note { background: rgba(53,211,154,.08); border: 1px solid rgba(53,211,154,.30); color: var(--text); font-size: 12.5px; line-height: 1.5; padding: 9px 12px; border-radius: 10px; margin: 10px 0 0; }
.site-foot { text-align: center; color: var(--muted); font-size: 12.5px; padding: 18px 16px 28px; line-height: 1.6; }
.site-foot .safe-badge { display: inline-flex; vertical-align: middle; margin-right: 4px; }

/* viewer */
.viewer-body { display: flex; justify-content: center; background: #000; border-radius: 10px; min-height: 200px; max-height: 60vh; overflow: hidden; }
.viewer-body img, .viewer-body video { max-width: 100%; max-height: 60vh; object-fit: contain; }
.preview-broken { color: #ff9b9b; padding: 28px 12px; text-align: center; font-size: 14px; }
.viewer-actions { margin-top: 12px; display: flex; gap: 10px; }

/* scrollable gallery + pager */
.gallery-scroll { max-height: 64vh; overflow-y: auto; padding: 2px; }
.gallery-scroll::-webkit-scrollbar { width: 10px; }
.gallery-scroll::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; }
.gallery-scroll::-webkit-scrollbar-track { background: transparent; }
.pager { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 14px; flex-wrap: wrap; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.pager .total { color: var(--muted); font-size: 13px; }
.pager-ctrl { display: flex; align-items: center; gap: 10px; }
.pager-ctrl #pageInfo { color: var(--text); font-size: 13px; }

/* announcements banner */
.ann-bar { background: rgba(243,186,47,.12); border: 1px solid rgba(243,186,47,.4); border-radius: 12px; padding: 10px 12px; margin-bottom: 14px; }
.ann-item { display: flex; gap: 10px; align-items: flex-start; }
.ann-item + .ann-item { margin-top: 8px; border-top: 1px solid rgba(243,186,47,.25); padding-top: 8px; }
.ann-dot { font-size: 16px; line-height: 1.4; }
.ann-item strong { color: #f3ba2f; }
.ann-content { color: var(--text); font-size: 13.5px; margin-top: 2px; line-height: 1.5; }

/* video preview-only (no inline playback) */
.preview-frame { max-width: 100%; max-height: 55vh; object-fit: contain; border-radius: 8px; background: #000; }
.preview-hint { text-align: center; color: var(--muted); font-size: 13px; margin-top: 10px; }

/* admin tables + thumbnails */
.files-scroll { max-height: 60vh; overflow: auto; border: 1px solid var(--line); border-radius: 12px; }
.files-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 760px; }
.files-table th, .files-table td { padding: 8px 10px; text-align: left; vertical-align: middle; }
.files-table tbody tr:hover { background: rgba(255,255,255,.02); }
.tmb-wrap { width: 56px; height: 56px; border-radius: 8px; overflow: hidden; cursor: pointer; background: #000; display: flex; align-items: center; justify-content: center; }
.tmb { width: 56px; height: 56px; object-fit: cover; display: block; }

/* admin batch bar */
.batch-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.batch-bar .spacer { flex: 1; }
.batch-bar .sel-count { color: var(--muted); font-size: 13px; }

/* admin module tabs */
.adm-tabs { display: flex; gap: 4px; overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 4px 0 16px; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.adm-tabs .adm-tab { flex: 0 0 auto; background: transparent; border: none; color: var(--muted); padding: 10px 14px; font-size: 14px; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.adm-tabs .adm-tab.active { color: var(--text); border-bottom-color: var(--primary); font-weight: 600; }
.adm-mod { animation: modfade .18s ease; }
@keyframes modfade { from { opacity: .35 } to { opacity: 1 } }

/* admin announcements */
.ann-admin-list { display: flex; flex-direction: column; gap: 10px; }
.ann-admin-item { display: flex; gap: 12px; align-items: flex-start; justify-content: space-between; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.ann-admin-main { flex: 1; min-width: 0; }
.ann-admin-main strong { color: var(--text); }
.ann-admin-ops { display: flex; gap: 8px; flex-wrap: wrap; }
.ann-meta { color: var(--muted); font-size: 12px; margin-top: 6px; }
.tag-on { color: var(--ok); border: 1px solid rgba(53,211,154,.4); border-radius: 999px; padding: 1px 8px; }
.tag-off { color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; }

/* toasts */
.toast-wrap { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 80; display: flex; flex-direction: column; gap: 8px; width: max-content; max-width: 90vw; }
.toast { background: var(--card); border: 1px solid var(--line); color: var(--text); padding: 10px 16px; border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,.4); font-size: 14px; animation: pop .2s; }
.toast.err { border-color: var(--danger); }
.toast.ok { border-color: var(--ok); }
@keyframes pop { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; } }

/* mobile */
@media (max-width: 600px) {
  .gallery { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .container { padding: 12px; }
  .dz-text { font-size: 14px; }
  .modal-card { padding: 16px; }
  .toolbar { gap: 8px; }
  .btn { padding: 9px 12px; }
  .topbar { padding: 10px 12px; }
  .adm-tabs .adm-tab { padding: 9px 12px; font-size: 13px; }
  .filters { gap: 8px; padding: 10px; }
  .filters label, .filters select, .filters input { font-size: 13px; }
  .files-table { font-size: 12px; }
  .files-table th, .files-table td { padding: 6px; }
  .pager { padding: 8px 10px; }
  .viewer-body { max-height: 50vh; }
  .share-row { flex-direction: column; align-items: stretch; }
  .share-acts { justify-content: flex-end; }
  /* 小屏隐藏居中时钟，避免与品牌/操作按钮重叠 */
  .adm-clock { display: none; }
}

/* share (view-once) placeholder tile */
.card .thumb.placeholder { display: flex; align-items: center; justify-content: center; font-size: 38px; color: var(--muted); background: var(--bg2); }
.card .thumb.placeholder.destroyed { color: var(--danger); }

/* 截图提示遮罩（Web 无法真正阻止截图，仅做尽力提示） */
.ss-warning {
  position: fixed; left: 50%; top: 18px; transform: translateX(-50%);
  z-index: 9999; background: rgba(255,92,122,.95); color: #fff;
  padding: 10px 16px; border-radius: 10px; font-size: 13.5px; font-weight: 600;
  box-shadow: 0 6px 20px rgba(0,0,0,.35); max-width: 92vw; text-align: center;
}
.ss-warning.hidden { display: none; }

/* brand as link (share page) */
a.brand { text-decoration: none; color: inherit; }

/* my shares (personal center) */
.shares-list { display: flex; flex-direction: column; gap: 10px; }
.share-row { display: flex; align-items: center; gap: 12px; background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.share-info { flex: 1; min-width: 0; }
.share-title { font-weight: 600; font-size: 14.5px; display: flex; align-items: center; gap: 8px; }
.share-meta { color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.share-acts { display: flex; gap: 8px; flex: none; }
.tag { font-size: 11px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.tag.once { color: var(--danger); border-color: rgba(255,92,122,.4); }
.tag.expired { color: var(--muted); }
.shares-pager { margin-top: 14px; }

/* ===== 皮肤：炫白（light） ===== */
:root[data-theme="light"] {
  --bg: #f4f6fb;
  --bg2: #ffffff;
  --card: #ffffff;
  --line: #d8deea;
  --text: #1a2030;
  --muted: #6b7488;
  --primary: #3f6fe0;
  --primary-d: #2f57bd;
  --danger: #e0405f;
  --ok: #18a978;
  --radius: 14px;
}
:root[data-theme="light"] body { color: var(--text); }
:root[data-theme="light"] .topbar { background: rgba(255,255,255,.85); }
:root[data-theme="light"] .modal { background: rgba(20,24,40,.35); }
:root[data-theme="light"] .dropzone, :root[data-theme="light"] .toolbar,
:root[data-theme="light"] .batch-bar, :root[data-theme="light"] .pager { background: var(--bg2); }

/* brand + logo */
.brand { display: flex; align-items: center; gap: 8px; }
.brand .logo { color: var(--primary); flex: none; }
.brand #brandName, .brand span { font-weight: 700; font-size: 17px; letter-spacing: .3px; }

/* 用户下拉菜单（皮肤 + 退出） */
.user-menu { position: relative; }
.user-trigger { cursor: pointer; }
.dropdown {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 60;
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px; min-width: 160px; box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.dropdown.hidden { display: none; }
.dropdown-title { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.skin-row { display: flex; gap: 8px; margin-bottom: 8px; }
.skin-btn {
  flex: 1; padding: 8px 0; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); cursor: pointer; font-size: 13px;
}
.skin-btn.active { border-color: var(--primary); background: rgba(91,140,255,.12); color: var(--primary); }
.dropdown-item {
  width: 100%; text-align: left; padding: 9px 10px; border: none; border-radius: 8px;
  background: transparent; color: var(--text); cursor: pointer; font-size: 13px;
}
.dropdown-item:hover { background: var(--bg); }

/* 公告全屏锁定（用户端） */
.ann-lock {
  position: fixed; inset: 0; z-index: 200; background: var(--bg);
  display: flex; align-items: center; justify-content: center; padding: 24px; overflow: auto;
}
.ann-lock.hidden { display: none; }
.ann-lock-inner { max-width: 640px; width: 100%; display: flex; flex-direction: column; gap: 16px; }
.ann-lock-item {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px;
}
.ann-lock-title { font-size: 20px; font-weight: 700; color: #f3ba2f; margin-bottom: 10px; }
.ann-lock-content { font-size: 15px; line-height: 1.7; color: var(--text); white-space: pre-wrap; }

/* 分享页：水印 + 画质保护 + 马赛克 + 倒计时 */
.watermark {
  position: absolute; top: 10px; left: 10px; right: 10px; pointer-events: none;
  font-size: 13px; color: rgba(255,255,255,.55); text-shadow: 0 1px 3px rgba(0,0,0,.6);
  transform: rotate(-4deg); letter-spacing: 1px; z-index: 5;
}
.viewer-body { position: relative; }
.protected-media { filter: blur(1.4px) contrast(.92) saturate(.9); }
.mosaic { filter: blur(16px); transform: scale(1.04); }
.card .mosaic-cover {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(10,12,24,.45); color: #fff; font-size: 13px; font-weight: 600; cursor: pointer;
  text-align: center; padding: 8px; z-index: 4;
}
.card { position: relative; }
.countdown-overlay {
  position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%);
  background: rgba(0,0,0,.7); color: #fff; padding: 8px 16px; border-radius: 999px;
  font-size: 15px; font-weight: 600; z-index: 8;
}
.countdown-overlay.hidden { display: none; }
.destroyed-overlay {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(8,10,20,.92); z-index: 9;
}
.destroyed-overlay.hidden { display: none; }
.destroyed-inner { color: #ff7a90; font-size: 22px; font-weight: 700; }
.play-gate { display: flex; align-items: center; justify-content: center; min-height: 240px; }