:root{
  --bg:#f6f7f9; --panel:#ffffff; --ink:#14181f; --muted:#5b6572; --line:#e4e8ee;
  --brand:#0f766e; --brand-2:#0ea5a4; --brand-soft:#e6f5f3; --danger:#b42318; --danger-soft:#fef3f2;
  --ok:#067647; --warn:#b54708; --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px -12px rgba(16,24,40,.12);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
a{color:var(--brand);text-decoration:none}
b{font-weight:650}
u{text-underline-offset:3px}

/* topbar */
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto}
.brand-mark{display:inline-flex}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px;letter-spacing:.2px}
.brand-text span{font-size:11px;color:var(--muted)}
.tabs{display:flex;gap:4px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{border:0;background:transparent;color:var(--muted);font:inherit;font-size:14px;padding:8px 12px;border-radius:9px;cursor:pointer;white-space:nowrap;transition:.15s}
.tab:hover{background:#eef1f5;color:var(--ink)}
.tab.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.pill-new{font-style:normal;font-size:9px;font-weight:700;letter-spacing:.4px;background:var(--brand);color:#fff;border-radius:5px;padding:1px 5px;margin-left:4px;vertical-align:middle}
.pill-new.inline{font-size:10px;padding:2px 6px}
.topbar-badge{flex:0 0 auto;font-size:12px;color:var(--ok);background:#eafaf1;border:1px solid #c7ebd7;padding:5px 10px;border-radius:999px}

/* panels */
main{padding:34px 22px 10px}
.panel{display:none;animation:fade .22s ease}
.panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.hero{margin:6px 0 22px}
.hero.small{margin:0 0 18px}
.hero h1{font-size:30px;line-height:1.25;letter-spacing:-.02em;margin:0 0 8px;font-weight:750}
.hero.small h1{font-size:23px}
.hl{background:linear-gradient(transparent 62%,var(--brand-soft) 62%);color:var(--brand)}
.sub{color:var(--muted);margin:0;max-width:760px;font-size:14.5px}

/* dropzone */
.dropzone{position:relative;border:1.6px dashed #c7ced8;border-radius:var(--radius);background:var(--panel);transition:.18s;cursor:pointer;overflow:hidden}
.dropzone:hover,.dropzone.drag{border-color:var(--brand-2);background:#fbfefd;box-shadow:var(--shadow)}
.dropzone:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px}
.dz-inner{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:42px 20px;gap:7px}
.dz-icon{font-size:26px;filter:grayscale(.2)}
.dz-title{font-weight:600;font-size:15px}
.dz-hint{color:var(--muted);font-size:12.5px}

/* toolbar & buttons */
.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0}
.toolbar-note{color:var(--muted);font-size:13px}
.btn{font:inherit;font-size:14px;border:1px solid var(--line);background:#fff;color:var(--ink);padding:9px 15px;border-radius:10px;cursor:pointer;transition:.15s;font-weight:550}
.btn:hover:not(:disabled){border-color:#bcc6d2;background:#f7f9fc}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover:not(:disabled){background:#0c5f59;border-color:#0c5f59}
.btn.ghost{background:transparent}
.btn.danger{background:var(--danger-soft);border-color:#f3c6c1;color:var(--danger)}

/* file list */
.filelist{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.frow{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;box-shadow:var(--shadow)}
.frow .thumb{width:52px;height:52px;border-radius:8px;object-fit:cover;background:#eef1f5;flex:0 0 auto;border:1px solid var(--line)}
.frow .fmeta{flex:1 1 auto;min-width:0}
.frow .fname{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.frow .fsmall{color:var(--muted);font-size:12px;margin-top:2px}
.frow .fafter{font-size:12px;color:var(--ok);margin-top:2px}
.chip{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;margin:2px 4px 2px 0;border:1px solid var(--line);background:#f7f9fc;color:var(--muted)}
.chip.ai{background:var(--danger-soft);border-color:#f3c6c1;color:var(--danger)}
.chip.ok{background:#eafaf1;border-color:#c7ebd7;color:var(--ok)}
.frow .fact{display:flex;gap:8px;flex:0 0 auto}

/* metadata groups */
.meta-banner{border-radius:12px;padding:14px 16px;margin:16px 0;border:1px solid var(--line);background:var(--panel)}
.meta-banner.has-ai{border-color:#f3c6c1;background:var(--danger-soft)}
.meta-banner h4{margin:0 0 4px;font-size:15px}
.grp{border:1px solid var(--line);border-radius:12px;margin:10px 0;overflow:hidden;background:var(--panel)}
.grp h5{margin:0;padding:11px 14px;font-size:13.5px;background:#f7f9fc;border-bottom:1px solid var(--line);display:flex;justify-content:space-between}
.grp table{width:100%;border-collapse:collapse;font-size:13px}
.grp td{padding:8px 14px;border-bottom:1px solid #f0f3f7;vertical-align:top}
.grp tr:last-child td{border-bottom:0}
.grp td.k{color:var(--muted);width:38%;font-family:var(--mono);font-size:12px}
.grp td.v{word-break:break-word}
.empty{color:var(--muted);text-align:center;padding:30px}

/* gif */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
@media(max-width:760px){.grid2{grid-template-columns:1fr}}
.gif-controls{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.ctrl-row{margin-bottom:12px}
.switch{display:flex;gap:9px;align-items:flex-start;cursor:pointer;font-size:14px}
.switch input{margin-top:3px;width:16px;height:16px;accent-color:var(--brand)}
.switch small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.hint{color:var(--muted);font-size:12.5px;background:#f7f9fc;border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-top:4px}
.gif-stage{display:grid;grid-template-columns:1.3fr .9fr;gap:20px;margin-top:20px;align-items:start}
@media(max-width:760px){.gif-stage{grid-template-columns:1fr}}
.gif-canvas-box{position:relative;display:block;width:100%;max-width:100%;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:
  repeating-conic-gradient(#eef1f5 0% 25%, #fff 0% 50%) 50%/18px 18px}
#gif-canvas{display:block;width:100%;height:auto}
.gif-sel{position:absolute;border:2px solid var(--brand-2);background:rgba(14,165,164,.15);pointer-events:none;border-radius:2px}
.gif-meta-line{color:var(--muted);font-size:12.5px;margin-top:8px}
.gif-actions{display:flex;flex-direction:column;gap:10px}

/* text tool */
.textbox{width:100%;min-height:150px;border:1px solid var(--line);border-radius:12px;padding:14px;font:14px/1.6 var(--sans);background:var(--panel);resize:vertical;outline:none}
.textbox:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(14,165,164,.12)}
.textbox.out{background:#fbfcfd}

/* prose */
.prose{max-width:820px;color:#2a313b}
.prose h3{font-size:16px;margin:22px 0 8px}
.prose p{color:#3c4552;font-size:14.5px}
.prose b{color:var(--ink)}

.footer{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:12px;padding:30px 22px 40px;border-top:1px solid var(--line);margin-top:36px}
.panel:not(.active){display:none}