:root{--bg: #f6f7f9;--surface: #ffffff;--surface-2: #eef0f4;--text: #1c1f26;--muted: #6b7280;--border: #e4e7ec;--accent: #6d5efc;--accent-ink: #ffffff;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);--radius: 18px;--again: #f0526a;--hard: #f5a524;--good: #21b07a;--easy: #4c8dff;--new: #6d5efc;--safe-t: env(safe-area-inset-top, 0px);--safe-b: env(safe-area-inset-bottom, 0px)}@media(prefers-color-scheme:dark){:root{--bg: #0e1013;--surface: #181b20;--surface-2: #22262d;--text: #eceef2;--muted: #9aa2af;--border: #2a2f37;--accent: #8b7dff;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 30px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,system-ui,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none;-webkit-tap-highlight-color:transparent}body{overflow-x:hidden;user-select:none;-webkit-user-select:none}#app{min-height:100%}.screen{max-width:560px;margin:0 auto;padding:calc(var(--safe-t) + 12px) 18px calc(var(--safe-b) + 24px);min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;gap:16px}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:40px}.topbar .title{font-weight:600}.counter{font-variant-numeric:tabular-nums;font-size:14px;font-weight:600}.brand{display:inline-flex;align-items:center;gap:6px;font-size:17px}.brand svg{color:var(--accent)}.hero{text-align:center;margin-top:8vh}.hero h1{margin:12px 0 6px;font-size:30px;letter-spacing:-.02em}.logo{width:68px;height:68px;margin:0 auto;display:grid;place-items:center;border-radius:20px;color:#fff;background:linear-gradient(150deg,#7b6cff,#5b4bf0);box-shadow:var(--shadow)}.iconbtn{border:0;background:var(--surface);color:var(--text);width:40px;height:40px;border-radius:12px;font-size:18px;box-shadow:var(--shadow);cursor:pointer}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.card h3{margin:0 0 12px;font-size:15px;letter-spacing:.01em}.form{display:flex;flex-direction:column;gap:14px}.form label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:var(--muted)}input,textarea,select{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:12px 14px;width:100%;-webkit-appearance:none;user-select:text;-webkit-user-select:text}textarea{resize:vertical}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);border-color:var(--accent)}.hint{font-size:12px;line-height:1.5;font-weight:400}.code{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:12px 14px;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;overflow-x:auto;user-select:text;-webkit-user-select:text;margin:12px 0}.card p{margin:0 0 10px;line-height:1.5}.card p:last-child{margin-bottom:0}.btn{border:1px solid var(--border);background:var(--surface-2);color:var(--text);font:inherit;font-weight:600;padding:13px 18px;border-radius:14px;cursor:pointer;transition:transform .08s ease,opacity .2s}.btn:active{transform:scale(.97)}.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent}.btn.ghost{background:transparent}.btn.big{width:100%;padding:16px;font-size:16px}.btn:disabled{opacity:.45;cursor:default}.link{background:none;border:0;color:var(--accent);font:inherit;font-weight:600;cursor:pointer;padding:4px}.link.muted{color:var(--muted)}.link.danger{color:var(--again)}.back{margin-left:-4px}.due-card{background:linear-gradient(160deg,var(--surface),var(--surface));border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);padding:30px 20px 22px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:4px}.due-card.done{background:linear-gradient(160deg,#21b07a22,var(--surface))}.due-number{font-size:68px;font-weight:800;letter-spacing:-.04em;line-height:1}.due-card.done .due-number{color:var(--good);font-size:52px}.due-label{color:var(--muted);font-weight:600;margin-bottom:14px}.chips{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap;justify-content:center}.chip{font-size:12px;font-weight:600;padding:5px 10px;border-radius:999px;background:var(--surface-2)}.chip.new{color:var(--new)}.chip.learn{color:var(--hard)}.chip.rev{color:var(--good)}.due-card .btn.big{max-width:320px}.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tile{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 14px;font:inherit;font-weight:600;color:var(--text);display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer}.tile:active{transform:scale(.98)}.tile-ico{font-size:22px;color:var(--accent)}.study{justify-content:space-between}.flashcard{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);margin:6px 0;padding:28px 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.g-int{font-size:11px;opacity:.9;font-variant-numeric:tabular-nums}.grade.again{background:var(--again)}.grade.hard{background:var(--hard)}.grade.good{background:var(--good)}.grade.easy{background:var(--easy)}.done-screen{align-items:center;justify-content:center;text-align:center;gap:10px}.done-emoji{width:84px;height:84px;border-radius:50%;display:grid;place-items:center;background:var(--good);color:#fff;font-size:42px;margin-bottom:8px}.list{display:flex;flex-direction:column;gap:10px}.row{background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:14px;display:grid;grid-template-columns:auto 1fr auto;gap:6px 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18px;border-radius:12px;font-size:14px;font-weight:600;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%)}#toast.toast--error{background:var(--again)}#toast.toast--success{background:var(--good)}