:root{--bg:#f3f6fb;--card:#fff;--ink:#142033;--muted:#718096;--line:#e4eaf2;--blue:#2864d7;--blue2:#1749a6;--navy:#101827;--shadow:0 10px 28px #15294a0d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Tahoma,Arial,sans-serif;padding-bottom:calc(88px + env(safe-area-inset-bottom));-webkit-tap-highlight-color:transparent}.topbar{height:76px;background:var(--navy);color:white;display:flex;align-items:center;justify-content:space-between;padding:0 20px;padding-top:env(safe-area-inset-top)}.brand{display:flex;align-items:center;gap:11px}.brand-icon{width:40px;height:40px;border-radius:13px;background:linear-gradient(145deg,#4b8cff,#1749a6);display:grid;place-items:center;font-weight:900;letter-spacing:-1px}.brand strong{display:block;font-size:15px;letter-spacing:.2px}.brand small{display:block;color:#aebbd0;font-size:10px;margin-top:3px}.icon-btn{border:0;background:#ffffff16;color:white;border-radius:12px;width:38px;height:38px;font-size:25px}.main{max-width:760px;margin:auto;padding:20px 18px 30px}.welcome{position:relative;overflow:hidden;background:linear-gradient(125deg,#14243d,#1d4380 75%,#2864d7);border-radius:24px;padding:24px 22px;color:#fff;min-height:180px;display:flex;align-items:center;box-shadow:0 15px 30px #173d7a20}.welcome h1{font-size:27px;line-height:1.45;margin:8px 0;font-weight:850}.welcome h1 em{font-style:normal;color:#9fc3ff}.welcome p{font-size:12px;color:#d5e2f7;margin:0}.eyebrow{font-size:10px;color:#9fc3ff;font-weight:700}.welcome-mark{position:absolute;left:15px;top:20px;font-size:105px;color:#ffffff12}.stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0 26px}.stats div{background:var(--card);border:1px solid var(--line);border-radius:17px;padding:13px 16px;box-shadow:var(--shadow)}.stats b{display:block;font-size:24px;color:var(--blue)}.stats span{font-size:11px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:13px}.section-head h2{font-size:18px;margin:0 0 4px}.section-head p{font-size:11px;color:var(--muted);margin:0}.primary{border:0;border-radius:13px;background:var(--blue);color:#fff;font-weight:750;padding:13px 17px;font-size:13px;box-shadow:0 7px 15px #2864d72a}.primary:active{transform:scale(.98)}.primary.small{padding:10px 12px;font-size:11px;white-space:nowrap}.search-wrap{height:45px;background:white;border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;gap:9px;padding:0 13px;margin-bottom:15px;color:var(--muted)}.search-wrap input{border:0;outline:0;background:transparent;width:100%;font:inherit;font-size:12px;color:var(--ink)}.subject-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.subject-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:15px;min-height:132px;text-align:right;box-shadow:var(--shadow);cursor:pointer;overflow:hidden}.subject-card:active{transform:scale(.985)}.subject-symbol{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;font-size:19px;margin-bottom:13px}.subject-card h3{font-size:14px;margin:0 0 5px;overflow-wrap:anywhere}.subject-card p{font-size:10px;color:var(--muted);margin:0}.card-more{position:absolute;left:10px;top:10px;border:0;background:#f1f4f9;border-radius:9px;width:28px;height:28px;color:#607089}.empty{text-align:center;padding:35px 20px;background:#fff;border:1px dashed #cbd6e5;border-radius:20px}.empty-icon{font-size:36px;color:var(--blue)}.empty h3{margin:10px 0 5px}.empty p{font-size:12px;color:var(--muted);line-height:1.8}.hidden{display:none!important}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(68px + env(safe-area-inset-bottom));padding:7px 18px env(safe-area-inset-bottom);background:#fffffff2;backdrop-filter:blur(18px);border-top:1px solid var(--line);display:flex;justify-content:space-around;z-index:10}.nav-item{border:0;background:transparent;color:#8a97aa;font-size:10px;display:flex;flex-direction:column;gap:3px;align-items:center;min-width:65px}.nav-item span{font-size:23px;line-height:25px}.nav-item.active{color:var(--blue);font-weight:800}.toast{position:fixed;bottom:calc(82px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%,15px);background:#15243a;color:white;padding:11px 16px;border-radius:12px;font-size:12px;opacity:0;pointer-events:none;transition:.2s;z-index:60;white-space:nowrap}.toast.show{opacity:1;transform:translate(-50%,0)}
/* overlays */.overlay{position:fixed;inset:0;background:#09132680;z-index:30;display:flex;align-items:flex-end;justify-content:center}.sheet{background:var(--bg);width:100%;max-width:760px;max-height:94dvh;overflow:auto;border-radius:24px 24px 0 0;padding:18px 18px calc(24px + env(safe-area-inset-bottom));animation:up .2s ease}.sheet.full{height:100dvh;max-height:100dvh;border-radius:0;padding-top:calc(14px + env(safe-area-inset-top))}@keyframes up{from{transform:translateY(35px);opacity:.5}to{transform:none;opacity:1}}.sheet-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px}.sheet-head h2{font-size:18px;margin:0}.ghost{border:0;background:#e8edf5;color:#31415a;border-radius:11px;padding:9px 12px;font-size:12px}.field{display:block;margin:12px 0}.field span{display:block;font-size:12px;font-weight:700;margin-bottom:7px}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);background:white;border-radius:13px;padding:13px;font:inherit;font-size:14px;outline-color:var(--blue);color:var(--ink)}.field textarea{min-height:90px;resize:vertical}.actions{display:flex;gap:9px;margin-top:16px}.actions>*{flex:1}.secondary{border:1px solid var(--line);background:#fff;border-radius:13px;padding:12px;color:var(--ink);font-weight:700}.detail-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:13px}.photo-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.photo-tile{position:relative;aspect-ratio:1;background:#e5eaf1;border-radius:11px;overflow:hidden}.photo-tile img{width:100%;height:100%;object-fit:cover}.photo-tile button{position:absolute;top:5px;left:5px;border:0;border-radius:20px;background:#111a;color:white;padding:5px 7px}.photo-tile .fav{left:auto;right:5px;color:#ffd34f}.no-photos{text-align:center;padding:35px 10px;color:var(--muted);font-size:13px}.camera-shell{background:#070b12;color:white;min-height:80dvh;display:flex;flex-direction:column}.camera-video-wrap{position:relative;flex:1;min-height:45vh;background:#000;overflow:hidden;display:grid;place-items:center}.camera-video-wrap video{width:100%;height:100%;object-fit:contain}.camera-top{display:flex;justify-content:space-between;padding:10px}.camera-controls{padding:14px 18px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}.camera-controls button{border:0;border-radius:14px;padding:12px 14px;background:#ffffff20;color:white}.shutter{width:66px;height:66px;border-radius:50%!important;border:5px solid #ffffff!important;background:#fff!important;box-shadow:inset 0 0 0 3px #14243d}.zoom-row{display:flex;align-items:center;gap:10px;padding:8px 20px}.zoom-row input{flex:1;accent-color:#6da2ff}.preview-img{max-width:100%;max-height:58dvh;object-fit:contain;display:block;margin:auto}.viewer-image{width:100%;max-height:60dvh;object-fit:contain;touch-action:pan-x pan-y pinch-zoom;background:#0c111a;border-radius:12px}.viewer-tools{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.viewer-tools button{flex:1;min-width:70px}.trash-row{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);padding:9px;border-radius:13px;margin:8px 0}.trash-row img{width:55px;height:55px;object-fit:cover;border-radius:9px}.trash-row div{flex:1}.trash-row strong{font-size:12px}.trash-row small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.camera-hint{font-size:11px;color:#aebbd0;text-align:center;padding:0 12px 10px}
.symbol-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}