:root{--ink:#183044;--muted:#687b89;--blue:#126bc5;--blue-dark:#07569f;--line:#e0e8ed;--soft:#f2f6f9;--white:#fff;--green:#16805e;--red:#b73b3b;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--soft);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-decoration:none}button,a,input{ -webkit-tap-highlight-color:transparent }button{font:inherit;cursor:pointer}button:disabled{cursor:wait;opacity:.6}[hidden]{display:none!important}.wrap{max-width:1420px;margin:0 auto;padding:0 38px}.top{background:#122a3e;color:#fff}.top-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:13px;color:#fff;font-weight:760;letter-spacing:1.5px;font-size:17px}.brand-mark{background:#2181db;width:43px;height:43px;display:grid;place-items:center;font-size:25px;border-radius:12px;font-weight:750}.brand-sub{display:block;color:#aabfcc;font-size:9px;letter-spacing:2.5px;margin-top:3px}.top nav{display:flex;gap:20px}.top nav a{font-size:13px;color:#dce9f3}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:40px 0 28px}.eyebrow{font-size:10px;letter-spacing:1.6px;color:var(--blue);font-weight:750;margin:0 0 9px}h1{font-size:34px;letter-spacing:-1.1px;line-height:1.15;margin:0 0 12px}.intro p:not(.eyebrow){color:var(--muted);margin:0;line-height:1.6;font-size:14px}.chip{font-size:12px;white-space:nowrap;padding:9px 13px;border-radius:99px;background:#e0f0e9;color:#156846;font-weight:650}.admin-panel{display:flex;justify-content:space-between;align-items:center;gap:20px;border:1px solid #c5dfd4;border-radius:14px;background:#f8fffb;padding:20px 22px;margin:0 0 22px}.admin-panel.closed{border-color:#e7ccbc;background:#fffaf7}.state{display:flex;gap:14px;align-items:center}.status-dot{width:12px;height:12px;background:var(--green);border-radius:50%;flex:none;box-shadow:0 0 0 5px #def0e8}.closed .status-dot{background:#b87231;box-shadow:0 0 0 5px #f7e9dd}.state strong{font-size:15px}.state p{margin:5px 0 0;font-size:12px;color:var(--muted)}.button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:39px;padding:10px 15px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-size:12px;font-weight:650;white-space:nowrap}.button:hover{filter:brightness(.97)}.button.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.button.primary:hover{background:var(--blue-dark)}.button.secondary{background:#fff}.button.danger{color:var(--red);border-color:#ecd5d5;background:#fff}.tools{display:flex;align-items:center;gap:10px;margin-bottom:20px;flex-wrap:wrap}.tool-hint{font-size:11px;color:var(--muted);margin-left:5px}.notice{padding:14px 17px;border-radius:10px;background:#e5f0fc;border:1px solid #cadff5;margin:0 0 20px;font-size:13px;line-height:1.6;white-space:pre-line}.notice.error{background:#fff1ef;border-color:#f0d2cc;color:#96372c}.content-grid{display:grid;grid-template-columns:minmax(310px,.87fr) minmax(0,1.65fr);gap:24px;align-items:start}.library{border-radius:14px;background:#fff;border:1px solid var(--line);padding:21px;min-width:0}.library.dragover{outline:3px dashed var(--blue);outline-offset:4px;background:#f8fcff}.library-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.library-head nav{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:12px;line-height:1.6;min-width:0}.crumb-sep{color:#a0afb9}.crumb-current{font-weight:700;overflow-wrap:anywhere}.icon-button{flex:none;font-size:22px;color:var(--muted);border:0;background:transparent;border-radius:6px;width:28px;height:28px}.icon-button:hover{background:var(--soft)}.list-summary{font-size:11px;color:var(--muted);margin:14px 0 20px}.folders{display:grid;gap:9px}.folder{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:10px;padding:13px 12px;background:#f8fbfe}.folder-open{display:flex;align-items:center;gap:12px;min-width:0;flex:1;color:var(--ink);background:none;border:0;text-align:left;padding:0}.folder-icon{font-size:23px;color:#357dbc;flex:none}.folder-name{font-size:14px;font-weight:680;overflow-wrap:anywhere}.folder-arrow{margin-left:auto;color:#7b9db8;font-size:19px}.files{display:grid;gap:12px;margin-top:13px}.file{border:1px solid var(--line);border-radius:10px;padding:15px;min-width:0;background:#fff}.file.selected{border-color:#73ade4;box-shadow:0 0 0 2px #eaf3fc;background:#fbfdff}.file-top{display:flex;align-items:flex-start;gap:12px}.file-tag{flex:none;display:grid;place-items:center;min-width:37px;max-width:58px;min-height:43px;border-radius:7px;background:#edf2f6;color:#607489;font-size:10px;font-weight:800;letter-spacing:.5px}.file-tag.pdf{color:#b64e42;background:#fff0ec}.file-name{font-size:13px;font-weight:650;line-height:1.5;overflow-wrap:anywhere;margin:0}.file-meta{font-size:10px;color:var(--muted);margin-top:5px}.file-buttons{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}.file-buttons .button{font-size:11px;padding:8px 11px;min-height:33px}.delete{font-size:11px;border:0;background:transparent;color:#966563;padding:6px;cursor:pointer;margin-left:auto;white-space:nowrap}.delete:hover{color:var(--red)}.preview{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;min-width:0}.preview-head{display:flex;align-items:center;justify-content:space-between;padding:22px;gap:20px;border-bottom:1px solid var(--line)}.preview-head h2{font-size:14px;line-height:1.5;font-weight:650;margin:6px 0 0;overflow-wrap:anywhere}.preview-head .eyebrow{font-size:9px;color:#7a8e9d}.preview-actions{display:flex;align-items:center;gap:15px;flex:none}.text-link{font-size:11px}.preview-empty{display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;min-height:500px;padding:45px 28px;background:linear-gradient(145deg,#fafdff,#f3f7fa)}.paper-icon{border:2px solid #cfdeea;color:#7d9aaf;border-radius:10px;display:grid;place-items:center;font-size:17px;font-weight:760;width:71px;height:86px;margin-bottom:23px}.preview-empty h3{font-size:18px;letter-spacing:-.3px;margin:0 0 12px}.preview-empty p{font-size:12px;line-height:1.9;color:var(--muted);margin:0}.preview iframe{display:block;border:0;width:100%;height:min(850px,78vh);min-height:560px;background:#e8edf1}.preview-help{font-size:10px;color:var(--muted);line-height:1.7;padding:0 20px;margin:13px 0}.empty{font-size:13px;text-align:center;padding:35px 10px;color:var(--muted);line-height:1.7}.drop-hint{font-size:11px;color:#8898a4;text-align:center;border-top:1px dashed var(--line);padding-top:18px;margin:22px 0 0;line-height:1.6}.upload{padding:17px 20px;background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:20px;font-size:12px}.upload>div{display:flex;justify-content:space-between;gap:12px}.upload strong{overflow-wrap:anywhere}.upload progress{display:block;width:100%;height:8px;margin-top:13px;accent-color:var(--blue)}.footer{display:flex;justify-content:space-between;gap:20px;color:#8596a3;font-size:10px;line-height:1.6;margin-top:35px;margin-bottom:30px}.closed-view{max-width:650px;background:white;border:1px solid var(--line);border-radius:18px;margin:90px auto;padding:45px;text-align:center}.closed-view h1{font-size:28px}.closed-view p{color:var(--muted);line-height:1.8;font-size:14px}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #72b2ec;outline-offset:3px}@media(min-width:1600px){.wrap{max-width:1560px}}@media(max-width:1050px){.wrap{padding:0 23px}.content-grid{grid-template-columns:minmax(280px,.85fr) minmax(0,1.1fr);gap:17px}.preview-head{flex-wrap:wrap;padding:18px}.preview-actions{width:100%;justify-content:flex-end}.library{padding:17px}h1{font-size:29px}}@media(max-width:730px){.wrap{padding:0 16px}.top-inner{min-height:73px}.top nav a{font-size:11px}.intro{padding:27px 0 22px;align-items:flex-start;flex-direction:column;gap:15px}h1{font-size:28px}.intro p:not(.eyebrow){font-size:13px}.content-grid{grid-template-columns:1fr}.preview-empty{min-height:280px}.preview iframe{height:70vh;min-height:480px}.admin-panel{padding:17px;align-items:flex-start;flex-direction:column;gap:17px}.admin-panel>.button{width:100%}.footer{font-size:10px;gap:15px}.tool-hint{width:100%;margin:3px 0 0}.closed-view{margin:35px 16px;padding:30px}.file-buttons .button{min-height:37px}.library-head nav{font-size:13px}}