:root{--ink: #1b2440;--ink-2: #3a4258;--muted: #5b6478;--bg: #f6f4ef;--card: #ffffff;--line: #e6e2d8;--line-2: #d6d1c4;--navy: #23306b;--navy-tint: #e6e9f5;--orange: #c4501c;--orange-ink: #9a3a12;--orange-tint: #fbe9df;--green: #1e7a55;--green-ink: #1e6a4a;--green-tint: #e1f2ea;--red-pen: #c8322a;--star: #d9822b;--radius: 18px;--tabbar-h: 64px;color-scheme:light}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:Plus Jakarta Sans,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}a{color:var(--navy)}h1,h2,h3,p{margin:0}:focus-visible{outline:3px solid #7f8fd6;outline-offset:2px}.app{min-height:100%;display:flex}.sidebar{display:none}.main{flex:1;min-width:0;padding-bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 16px)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:calc(16px + env(safe-area-inset-top)) 20px 8px;max-width:1120px;margin:0 auto}.content{max-width:1120px;margin:0 auto;padding:8px 16px 24px;display:flex;flex-direction:column;gap:16px}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--card);border-top:1px solid var(--line);padding:6px 8px calc(6px + env(safe-area-inset-bottom));display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:4px}.tab{border:0;background:transparent;border-radius:14px;min-height:52px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;font-weight:600;color:var(--muted);text-decoration:none;position:relative}.tab.active{background:var(--navy-tint);color:var(--navy)}.badge{position:absolute;top:4px;right:calc(50% - 22px);min-width:18px;height:18px;border-radius:9px;background:var(--orange);color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center;padding:0 5px}@media (min-width: 900px){.tabbar{display:none}.main{padding-bottom:32px}.sidebar{display:flex;flex-direction:column;gap:6px;width:252px;flex-shrink:0;position:sticky;top:0;height:100vh;padding:24px 16px;background:var(--card);border-right:1px solid var(--line)}.sidebar .tab{flex-direction:row;justify-content:flex-start;gap:12px;font-size:15px;padding:0 14px;min-height:48px}.sidebar .badge{position:static;margin-left:auto}.topbar{padding:28px 32px 8px}.content{padding:8px 32px 32px;gap:20px}}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;padding:0 6px 18px}.brand img{width:36px;height:36px;border-radius:10px}.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px}.grid{display:grid;gap:16px}@media (min-width: 720px){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.span-2{grid-column:span 2}}@media (min-width: 1100px){.grid-main{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start}}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;align-items:center;gap:12px}.wrap{flex-wrap:wrap}.between{justify-content:space-between}.grow{flex:1;min-width:0}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.card-btn{text-align:left;width:100%;display:block}.card-btn:hover{border-color:var(--line-2)}.lbl{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.h1{font-size:24px;font-weight:800;letter-spacing:-.01em}.h2{font-size:18px;font-weight:700}.sub{font-size:14px;color:var(--muted)}.body{font-size:14px;line-height:1.55;color:var(--ink-2)}.small{font-size:13px}.ok{color:var(--green);font-weight:600}.quote{background:var(--bg);border-radius:12px;padding:12px 14px}@media (min-width: 900px){.h1{font-size:28px}}.pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700;white-space:nowrap}.pill.orange{background:var(--orange-tint);color:var(--orange-ink)}.pill.navy{background:var(--navy-tint);color:var(--navy)}.pill.green{background:var(--green-tint);color:var(--green-ink)}.btn{border:0;border-radius:14px;min-height:48px;padding:0 18px;font-weight:700;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}.btn.primary{background:var(--navy);color:#fff}.btn.accent{background:var(--orange);color:#fff}.btn.green{background:var(--green);color:#fff}.btn.ghost{background:var(--card);border:1px solid var(--line-2);color:var(--ink)}.btn.outline{background:transparent;border:1px solid currentColor;color:var(--navy)}.btn.big{min-height:64px;font-size:18px;border-radius:18px;width:100%}.btn.block{width:100%}.btn[disabled]{background:#eceae4;color:var(--muted);cursor:not-allowed}.demo{border:1px dashed var(--navy);background:transparent;color:var(--navy);border-radius:12px;padding:8px 14px;min-height:44px;font-size:13px;font-weight:600}.chip{border-radius:999px;padding:0 14px;min-height:40px;font-size:13px;font-weight:600;border:1px solid var(--line-2);background:var(--card)}.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}.field{width:100%;border:1px solid var(--line-2);border-radius:12px;padding:12px;font-size:15px;background:#fff}.field-label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600}.avatar{width:44px;height:44px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;flex-shrink:0}.icon-btn{width:44px;height:44px;border-radius:14px;border:1px solid var(--line);background:var(--card);display:grid;place-items:center;position:relative}.dot{position:absolute;top:9px;right:10px;width:9px;height:9px;border-radius:50%;background:var(--orange)}.icon-tile{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;flex-shrink:0}.hero{background:var(--navy);color:#fff;border-radius:22px;padding:20px;display:flex;flex-direction:column;gap:12px}.hero .lbl{color:#c9d0ee}.hero .muted{color:#c9d0ee;font-size:14px}.hero-time{font-size:30px;font-weight:800;letter-spacing:-.01em}@keyframes pulse{0%{box-shadow:0 0 #c4501c8c}70%{box-shadow:0 0 0 18px #c4501c00}to{box-shadow:0 0 #c4501c00}}.pulse{animation:pulse 1.8s infinite}@media (prefers-reduced-motion: reduce){.pulse{animation:none}}.ring{width:96px;height:96px;border-radius:50%;display:grid;place-items:center;flex-shrink:0}.ring>div{width:74px;height:74px;border-radius:50%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center}.stat{background:var(--bg);border-radius:12px;padding:12px}.stat b{display:block;font-size:22px;font-weight:800}.stat span{font-size:12px;color:var(--muted)}.bar{height:10px;border-radius:999px;background:var(--line);overflow:hidden}.bar>div{height:100%;border-radius:999px;background:var(--green);transition:width .3s}.opt{min-height:52px;border-radius:14px;font-size:17px;font-weight:700;border:2px solid var(--line);background:#fff}.opt.right{background:var(--green);border-color:var(--green);color:#fff}.opt.wrong{background:var(--orange-tint);border-color:var(--orange);color:#8a3410}.feedback{border-radius:12px;padding:12px;font-size:14px;line-height:1.5}.feedback.right{background:var(--green-tint);color:var(--green-ink);font-weight:600}.feedback.wrong{background:var(--orange-tint);color:#8a3410}.paper{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fffdf6;touch-action:none}.paper img{display:block;width:100%;height:auto;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.paper canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.paper.drawing{cursor:crosshair;outline:3px solid rgba(200,50,42,.35)}.thumb{width:64px;height:80px;border-radius:8px;object-fit:cover;border:1px solid var(--line);flex-shrink:0;background:#fffdf6}.sheet-back{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;background:#1b244073;display:flex;align-items:flex-end;justify-content:center}.sheet{background:#fff;width:100%;max-width:560px;max-height:92vh;overflow-y:auto;border-radius:26px 26px 0 0;padding:20px 18px calc(24px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:14px}.sheet-grip{width:40px;height:5px;border-radius:999px;background:var(--line-2);align-self:center}@media (min-width: 700px){.sheet-back{align-items:center;padding:24px}.sheet{border-radius:24px;padding:24px}.sheet-grip{display:none}}.toast{position:fixed;left:50%;transform:translate(-50%);z-index:50;bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 16px);background:var(--ink);color:#fff;border-radius:16px;padding:14px 18px;width:min(440px,calc(100% - 32px));box-shadow:0 12px 28px #1b24404d;border:0;text-align:left}.toast b{display:block;font-size:15px}.toast span{font-size:13px;color:#c9d0ee}@media (min-width: 900px){.toast{bottom:24px}}.notif-list{display:flex;flex-direction:column}.notif{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.notif:last-child{border-bottom:0}.notif .icon-tile{width:36px;height:36px;border-radius:10px;background:var(--navy);color:#fff;font-weight:800}.unread{width:8px;height:8px;border-radius:50%;background:var(--orange);margin-top:6px;flex-shrink:0}.login{min-height:100%;display:grid;place-items:center;padding:24px 16px}.login-card{width:100%;max-width:440px;display:flex;flex-direction:column;gap:18px}.role-btn{display:flex;align-items:center;gap:14px;width:100%;text-align:left}@media (min-width: 900px){.mobile-only{display:none}}