:root{--bg:#f4f6fb;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--pri:#2563eb;--pri2:#1d4ed8;--danger:#dc2626;--dark:#0b1220;--r:16px;
--st:env(safe-area-inset-top,0px);--sb:env(safe-area-inset-bottom,0px)}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font:16px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;overscroll-behavior:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.hidden{display:none!important}
.screen{display:none;position:fixed;inset:0;flex-direction:column;overflow:hidden}
.screen.active{display:flex}
.screen.dark{background:#000;color:#fff}
.topbar{display:flex;align-items:center;gap:10px;padding:calc(10px + var(--st)) 16px 10px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px}
.brand img{width:34px;height:34px;border-radius:9px}
.home-main{flex:1;overflow:auto;padding:18px 16px calc(24px + var(--sb))}
.hero{display:grid;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:14px;padding:12px 18px;font-weight:600;min-height:48px;user-select:none}
.btn.big{min-height:58px;font-size:18px;width:100%}
.btn.sm{min-height:40px;padding:8px 16px}
.btn.primary{background:var(--pri);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.28)}
.btn.primary:active{background:var(--pri2)}
.btn.ghost{background:var(--card);border:1.5px solid var(--line);color:var(--ink)}
.btn.text{color:var(--muted);width:100%;min-height:48px}
.btn[disabled]{opacity:.5}
.section-title{font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:28px 4px 10px}
.doc-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.doc{display:flex;align-items:center;gap:14px;background:var(--card);border-radius:var(--r);padding:10px;border:1px solid var(--line)}
.doc .thumb{width:56px;height:72px;border-radius:8px;object-fit:cover;background:#e5e7eb;flex:none;border:1px solid var(--line)}
.doc .meta{flex:1;min-width:0;text-align:left;padding:4px 0}
.doc .meta b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc .meta small{color:var(--muted)}
.doc .open{display:flex;flex:1;align-items:center;gap:14px;min-width:0;min-height:72px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;flex:none}
.icon-btn.sm{width:40px;height:40px}
.icon-btn.lg{width:56px;height:56px;background:rgba(255,255,255,.14)}
.doc .del{color:var(--danger)}
.empty{color:var(--muted);text-align:center;margin:28px 0}
.privacy{color:var(--muted);font-size:13px;text-align:center;margin-top:28px}
/* camera */
#video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.cam-top{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;padding:calc(8px + var(--st)) 8px 8px;background:linear-gradient(#000c,#0000);font-weight:600}
#camera .cam-top{position:absolute;left:0;right:0;top:0}
.cam-bottom{position:absolute;left:0;right:0;bottom:0;z-index:2;display:flex;align-items:center;justify-content:space-around;padding:20px 16px calc(24px + var(--sb));background:linear-gradient(#0000,#000d)}
.shutter{width:78px;height:78px;border-radius:50%;border:4px solid #fff;display:flex;align-items:center;justify-content:center}
.shutter span{width:62px;height:62px;border-radius:50%;background:#fff;transition:transform .1s}
.shutter:active span{transform:scale(.88)}
.cam-done{width:56px;height:56px;border-radius:14px;background:var(--pri);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;font-weight:700;line-height:1}
.cam-done small{font-size:11px;font-weight:600;margin-top:2px}
.cam-done[disabled]{opacity:.35}
.cam-msg{position:absolute;z-index:1;left:24px;right:24px;top:40%;text-align:center;color:#cbd5e1}
.cam-msg .btn{margin-top:14px}
.flash{position:absolute;inset:0;background:#fff;z-index:3;opacity:0;pointer-events:none;transition:opacity .25s}
.text-btn{min-height:48px;padding:0 14px;color:#fff;font-weight:500}
.text-btn.strong{color:#60a5fa;font-weight:700}
/* crop */
.crop-stage{position:relative;flex:1;margin:8px 12px;touch-action:none}
#cropCanvas{position:absolute}
#cropSvg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#cropPoly{fill:rgba(37,99,235,.18);stroke:#60a5fa;stroke-width:2.5}
.handle{position:absolute;width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;touch-action:none;z-index:2}
.handle::after{content:"";position:absolute;inset:10px;border-radius:50%;background:#fff;border:3px solid var(--pri);box-shadow:0 2px 8px #0008}
.loupe{position:absolute;width:120px;height:120px;border-radius:50%;border:3px solid #fff;box-shadow:0 4px 16px #000a;pointer-events:none;z-index:3}
.crop-tools{display:flex;gap:10px;justify-content:center;padding:6px}
.chip-btn{min-height:44px;padding:0 18px;border-radius:22px;background:rgba(255,255,255,.14);color:#fff;font-weight:600}
.crop-hint{text-align:center;color:#94a3b8;font-size:14px;margin:4px 0 calc(14px + var(--sb));min-height:20px}
/* editor */
.ed-top{padding-left:4px}
.doc-name{flex:1;min-width:0;border:1.5px solid transparent;border-radius:10px;padding:9px 10px;font-weight:600;font-size:17px;background:var(--bg)}
.doc-name:focus{outline:none;border-color:var(--pri);background:#fff}
.preview-wrap{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:14px;position:relative;background:#e9edf5}
#preview{max-width:100%;max-height:100%;box-shadow:0 8px 28px rgba(15,23,42,.22);background:#fff;border-radius:2px}
.busy{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:rgba(233,237,245,.75);font-weight:600}
.spinner{width:38px;height:38px;border:4px solid #cbd5e1;border-top-color:var(--pri);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.filters{display:flex;gap:8px;padding:10px 12px 4px;overflow-x:auto;background:var(--card)}
.filters button{flex:1;min-height:44px;border-radius:12px;background:var(--bg);font-weight:600;font-size:15px;white-space:nowrap;padding:0 10px;border:1.5px solid var(--line)}
.filters button.on{background:var(--pri);color:#fff;border-color:var(--pri)}
.tools{display:flex;justify-content:space-between;padding:6px 6px;background:var(--card);overflow-x:auto}
.tool{display:flex;flex-direction:column;align-items:center;gap:3px;min-width:44px;min-height:56px;justify-content:center;font-size:11.5px;color:#334155;font-weight:600;border-radius:12px;padding:4px}
.tool:active{background:var(--bg)}
.tool.danger{color:var(--danger)}
.strip-bar{display:flex;align-items:center;justify-content:center;gap:16px;background:var(--card);border-top:1px solid var(--line);font-size:14px;color:var(--muted);font-weight:600}
.strip{display:flex;gap:10px;overflow-x:auto;padding:8px 12px calc(12px + var(--sb));background:var(--card);min-height:104px}
.th{position:relative;flex:none;width:62px;height:82px;border-radius:8px;border:2.5px solid transparent;overflow:hidden;background:#e5e7eb;touch-action:pan-x}
.th img{width:100%;height:100%;object-fit:cover;pointer-events:none}
.th.on{border-color:var(--pri)}
.th .n{position:absolute;left:3px;bottom:3px;background:#0f172acc;color:#fff;font-size:11px;font-weight:700;border-radius:6px;padding:1px 6px}
.th .grip{position:absolute;right:0;top:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:#0f172a99;color:#fff;border-bottom-left-radius:8px;touch-action:none}
.th .grip svg{width:16px;height:16px}
.th.dragging{opacity:.85;transform:scale(1.08);z-index:5;box-shadow:0 8px 20px #0005}
.th.add{display:flex;align-items:center;justify-content:center;border:2px dashed #94a3b8;background:var(--bg);color:#475569}
/* sheets */
.backdrop{position:fixed;inset:0;background:#0f172a80;z-index:20}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:21;background:#fff;border-radius:22px 22px 0 0;padding:18px 18px calc(12px + var(--sb));display:grid;gap:14px;max-height:92vh;overflow:auto;box-shadow:0 -10px 40px #0003}
.sheet h3{margin:0;font-size:19px}
.sheet.tall{height:85vh;grid-template-rows:auto 1fr auto auto}
.field{display:grid;gap:6px;font-size:14px;color:var(--muted);font-weight:600}
.field input,.field select{min-height:48px;border:1.5px solid var(--line);border-radius:12px;padding:0 12px;font-size:16px;color:var(--ink);background:#fff}
.switch{display:flex;align-items:center;gap:12px;min-height:48px}
.switch input{position:absolute;opacity:0}
.switch .track{width:52px;height:32px;border-radius:16px;background:#cbd5e1;position:relative;flex:none;transition:.2s}
.switch .track::after{content:"";position:absolute;top:3px;left:3px;width:26px;height:26px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px #0004}
.switch input:checked+.track{background:var(--pri)}
.switch input:checked+.track::after{left:23px}
.switch small{color:var(--muted)}
.row{display:flex;gap:10px}
.muted{color:var(--muted);margin:0;font-size:14px}
textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px;font-size:15px;resize:none;min-height:200px}
.toast{position:fixed;left:50%;bottom:calc(130px + var(--sb));transform:translateX(-50%);background:#0f172a;color:#fff;padding:12px 18px;border-radius:12px;z-index:40;font-weight:600;max-width:90vw;text-align:center;box-shadow:0 8px 24px #0004}
@media (min-width:700px){.home-main{max-width:640px;margin:0 auto;width:100%}.sheet{max-width:560px;margin:0 auto}}

.tool.toggle.on{color:var(--pri);background:#eff6ff}
.tool[disabled]{opacity:.35}
.cam-right{display:flex;align-items:center;gap:6px}
.hd-btn{min-width:48px;height:36px;border-radius:18px;border:2px solid #fff;color:#fff;font-weight:800;font-size:14px;letter-spacing:.04em;padding:0 10px}
.cam-hint{position:absolute;z-index:2;left:16px;right:16px;top:calc(70px + var(--st));background:#000b;color:#fff;padding:10px 14px;border-radius:12px;font-size:14px;text-align:center}
.settings{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:6px 14px}
.set-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.set-row+.set-row{border-top:1px solid var(--line)}
.set-row>span:first-child{display:flex;flex-direction:column;font-weight:600}
.set-row small{color:var(--muted);font-weight:400;font-size:12.5px}
.switch.set-row .track{order:2}
.seg{display:flex;background:var(--bg);border-radius:12px;padding:3px;flex:none}
.seg button{min-height:40px;padding:0 14px;border-radius:10px;font-weight:600;font-size:14px;color:var(--muted)}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 4px #0002}
.filters button{padding:0 6px;font-size:14px}