:root{--bg:#f7f8fb;--card:#fff;--ink:#1f2430;--muted:#9aa0ad;--line:#e7e9f0;--accent:#6366f1;--accent2:#8b5cf6;--ok:#10b981;--shadow:0 2px 8px rgba(30,40,60,.06)}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;font-family:-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink)}
.muted{color:var(--muted)}.err{color:#dc2626;font-size:13px}
.gate{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#eef1f6,#e7eaf5)}
.gate-card{background:var(--card);padding:28px 32px;border-radius:16px;box-shadow:var(--shadow);width:320px;text-align:center}
.gate-card h1{font-size:20px;margin:0 0 4px}
.gate-card input{width:100%;padding:10px 12px;margin:14px 0 10px;border:1px solid var(--line);border-radius:10px;font-size:15px}
.gate-card button,.tab{cursor:pointer}
.gate-card button{width:100%;padding:10px;border:0;border-radius:10px;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#fff;font-size:15px}
.topbar{display:flex;align-items:center;gap:18px;padding:12px 20px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.brand{font-weight:700}
.tabs{display:flex;gap:6px}
.tab{padding:6px 14px;border:0;background:transparent;border-radius:20px;font-size:14px;color:var(--muted)}
.tab.active{background:#eef0fb;color:var(--accent)}
.sync{margin-left:auto;font-size:12px;color:var(--muted)}
main{max-width:1100px;margin:0 auto;padding:20px}
.series-group{margin-bottom:22px}
.series-name{font-size:12px;letter-spacing:1px;color:var(--muted);text-transform:uppercase;margin:0 0 10px}
.bookcard{background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:14px 16px;margin-bottom:14px}
.bookcard h3{margin:0 0 4px;font-size:15px}
.bookcard .meta{font-size:12px;color:var(--muted);margin-bottom:10px}
.progress{height:6px;border-radius:6px;background:#eef0f4;overflow:hidden;margin-bottom:12px}
.progress>div{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2))}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:5px 7px;border-bottom:1px solid var(--line);text-align:left}
th{font-size:11px;color:var(--muted);font-weight:600}
td.c,th.c{text-align:center;width:34px}
.box{width:18px;height:18px;border:2px solid #c7cbf5;border-radius:5px;display:inline-block;cursor:pointer;vertical-align:middle}
.box.on{background:var(--accent);border-color:var(--accent);position:relative}
.box.on::after{content:"✓";color:#fff;font-size:12px;position:absolute;left:3px;top:-2px}
.date-in{width:96px;border:1px solid var(--line);border-radius:6px;padding:3px 5px;font-size:12px}
.bookgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.studycard{background:var(--card);border-radius:12px;box-shadow:var(--shadow);padding:12px 14px;cursor:pointer;transition:transform .1s}
.studycard:hover{transform:translateY(-2px)}
.sc-t{font-size:14px;font-weight:600;margin-bottom:4px;line-height:1.3}
.sc-m{font-size:11px}
.backbtn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 12px;font-size:13px;cursor:pointer;margin-bottom:12px}
.backbtn:hover{background:#f3f3f3}
.addform{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:14px}
.addform input{border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:13px}
.addform #isbnin,.addform #qin{min-width:230px}
.addform button{font-size:13px;padding:6px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
.addform #isbngo,.addform #qgo{background:linear-gradient(145deg,var(--accent),var(--accent2));color:#fff;border:0}
.addform .cancel{color:var(--muted)}
.addform .addstatus{font-size:12px}
.scanwrap{flex-basis:100%;margin-top:8px}
.scanwrap video{width:100%;max-width:360px;border-radius:10px;background:#000}
.rtoolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.rtoolbar button,.importbtn{font-size:13px;padding:6px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
.rtoolbar #add-isbn,.rtoolbar #add-series{background:linear-gradient(145deg,var(--accent),var(--accent2));color:#fff;border:0}
.rfilters{display:flex;gap:4px;margin-left:8px}
.rf{border-radius:20px!important;color:var(--muted)}
.rf.on{background:#eef0fb!important;color:var(--accent)}
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}
.shelfitem{background:var(--card);border-radius:12px;box-shadow:var(--shadow);padding:10px;cursor:pointer;transition:transform .1s}
.shelfitem:hover{transform:translateY(-2px)}
.cv{width:100%;height:180px;object-fit:cover;border-radius:8px;display:block}
.cv.ph{display:flex;align-items:flex-end;color:#fff;padding:8px;font-size:12px;font-weight:600;box-shadow:0 4px 10px rgba(99,102,241,.25)}
.si-t{font-size:13px;font-weight:600;margin:8px 0 2px;line-height:1.3}
.si-m{font-size:11px}
.det{margin-top:16px}
.det-h{display:flex;justify-content:space-between;align-items:center}
.det-h button{border:0;background:none;cursor:pointer;font-size:16px}
.det-actions{display:flex;gap:10px;align-items:center}
.det-actions .del{font-size:13px;color:#dc2626;border:1px solid #f3c2c2;border-radius:6px;padding:2px 10px}
.det-actions .del:hover{background:#fdecec}
.det-row{display:flex;gap:10px;align-items:center;font-size:13px;margin:10px 0;flex-wrap:wrap}
.det-row select,.tv{border:1px solid var(--line);border-radius:6px;padding:3px 6px}
.tv{width:60px}
.vols{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.vol{display:flex;flex-direction:column;align-items:center;gap:3px;border:1px solid var(--line);border-radius:8px;padding:6px 8px}
.vno{font-size:12px;color:var(--muted)}
.vb{width:26px;height:24px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer;font-size:12px}
.vb.own.on{background:#fde68a;border-color:#f59e0b}
.vb.read.on{background:var(--accent);color:#fff;border-color:var(--accent)}
.note{width:100%;min-height:54px;border:1px solid var(--line);border-radius:8px;padding:8px;font-family:inherit;font-size:13px;margin-top:6px}
@media print{.topbar,.gate,.sync{display:none!important}main{max-width:none;padding:0}.bookcard{break-inside:avoid;box-shadow:none;border:1px solid #ccc}}