@import"https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,600;12..96,700;12..96,800&family=Hanken+Grotesk:wght@400;500;600;700&display=swap";:root{--primary: #4F46E5;--primary-dark: #4338CA;--ink: #1E1B2E;--muted: #7C7A89;--bg: #FAF8F4;--card: #FFFFFF;--line: #ECEAF2;--display: "Bricolage Grotesque", sans-serif;--body: "Hanken Grotesk", sans-serif;--r-again: #F43F5E;--r-hard: #F59E0B;--r-good: #10B981;--r-easy: #0EA5E9}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0}body{font-family:var(--body);color:var(--ink);background:radial-gradient(120% 80% at 100% 0%,#EEF0FF 0%,var(--bg) 45%);background-attachment:fixed}.app{max-width:520px;margin:0 auto;min-height:100vh;padding-bottom:84px;position:relative}h1,h2,h3{font-family:var(--display);margin:0}button{font-family:var(--body);cursor:pointer;border:none;background:none}.header{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 8px}.brand{display:flex;align-items:center;gap:11px}.logo{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#5b5bd6,#4338ca);display:grid;place-items:center;box-shadow:0 6px 16px #4f46e559}.brand-name{font-weight:800;font-size:19px;line-height:1}.brand-tag{font-size:11px;color:var(--muted);font-weight:600;margin-top:3px}.pill{display:flex;align-items:center;gap:5px;background:#fff;border:1px solid var(--line);padding:7px 12px;border-radius:999px;font-size:14px;box-shadow:0 2px 8px #1e1b2e0a}.main{padding:12px 20px;display:grid;gap:22px}.hero{background:linear-gradient(135deg,#4f46e5,#6d5be0);border-radius:22px;padding:22px;color:#fff;box-shadow:0 14px 30px #4f46e547}.hero-small{font-size:14px;font-weight:600;opacity:.9}.hero-big{font-family:var(--display);font-weight:800;font-size:27px;line-height:1.1;margin-top:4px}.hero-big .num{font-size:34px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:#fff;color:var(--primary-dark);border-radius:14px;padding:13px 20px;font-weight:700;font-size:15px;box-shadow:0 6px 16px #0000001f}.btn-fill{background:var(--primary);color:#fff;box-shadow:0 8px 20px #4f46e54d}.btn-ghost{display:inline-flex;align-items:center;gap:5px;background:#fff;border:1px solid var(--line);color:var(--primary-dark);border-radius:11px;padding:8px 12px;font-weight:700;font-size:13px}.mt16{margin-top:16px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 10px;text-align:center;box-shadow:0 2px 10px #1e1b2e08}.stat-ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;margin:0 auto 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10px;border-radius:999px;white-space:nowrap}.badge-muted{color:var(--muted);background:var(--bg)}.study{padding:14px 20px;display:grid;gap:18px}.study-top{display:flex;align-items:center;gap:12px}.icon-btn{background:#fff;border:1px solid var(--line);border-radius:11px;width:38px;height:38px;display:grid;place-items:center;color:var(--ink)}.track{flex:1;height:8px;background:#e9e7f2;border-radius:999px;overflow:hidden}.track>div{height:100%;background:linear-gradient(90deg,#4f46e5,#7c6ff0);border-radius:999px;transition:width .3s}.flash{background:var(--card);border-radius:20px;padding:28px 24px;min-height:230px;box-shadow:0 10px 30px #1e1b2e12;display:flex;flex-direction:column;justify-content:center}.flash-meta{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);font-weight:600;margin-bottom:14px}.flash-front{font-family:var(--display);font-weight:700;font-size:22px;line-height:1.3}.flash-div{height:1px;background:var(--line);margin:20px 0}.flash-back{font-size:16px;line-height:1.55;color:#3a3650}.reveal-btn{background:var(--primary);color:#fff;border-radius:14px;padding:16px;font-weight:700;font-size:16px;box-shadow:0 8px 20px #4f46e54d;width:100%}.rates{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.rate{background:#fff;border:2px solid;border-radius:14px;padding:12px 2px;display:flex;flex-direction:column;align-items:center;gap:3px}.rate b{font-size:14px}.rate span{font-size:11px;color:var(--muted);font-weight:600}.done{padding:48px 28px;text-align:center;display:grid;gap:12px;place-items:center}.done .emoji{font-size:56px}.done h1{font-weight:800;font-size:30px;color:var(--primary)}.done p{font-size:16px;max-width:320px;line-height:1.5}.done-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;max-width:360px}.nav{position:fixed;bottom:0;left:0;right:0;max-width:520px;margin:0 auto;background:#ffffffeb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:8px 0 calc(8px + env(safe-area-inset-bottom))}.nav button{display:flex;flex-direction:column;align-items:center;gap:3px;font-size:11px;font-weight:700;color:var(--muted);padding:6px 18px;border-radius:12px}.nav button.active{color:var(--primary)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#1e1b2e73;display:grid;place-items:end center;z-index:50}.modal{background:var(--bg);border-radius:24px 24px 0 0;padding:22px 20px calc(28px + env(safe-area-inset-bottom));width:100%;max-width:520px;box-shadow:0 -10px 40px #0003;max-height:88vh;overflow-y:auto}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.field-l{display:block;font-size:13px;font-weight:700;margin:12px 0 6px}.input,.textarea,.select{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:15px;background:#fff;color:var(--ink);font-family:var(--body)}.textarea{resize:none}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--primary)}.tabs{display:flex;gap:8px;margin-bottom:6px}.tab{flex:1;padding:9px;border-radius:11px;font-weight:700;font-size:14px;background:#fff;border:1px solid var(--line);color:var(--muted)}.tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.hint{text-align:center;margin-top:10px;font-size:12px;color:var(--muted)}.onb{padding:0 24px;min-height:100vh;display:flex;flex-direction:column;justify-content:center;gap:10px}.onb h1{font-size:32px;line-height:1.1}.onb .sub{color:var(--muted);font-size:16px;margin-bottom:8px}.goal{display:flex;align-items:center;gap:12px;background:#fff;border:2px solid var(--line);border-radius:16px;padding:16px;width:100%;font-weight:700;font-size:15px;text-align:left;transition:border-color .15s}.goal:hover{border-color:var(--primary)}.fade-in{animation:fadeIn .35s ease both}.pop-in{animation:popIn .4s cubic-bezier(.34,1.56,.64,1) both}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes popIn{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.lift{transition:transform .12s ease}.lift:active{transform:scale(.97)}.toast{position:fixed;bottom:96px;left:50%;transform:translate(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;font-weight:600;z-index:60;animation:fadeIn .3s}.login-btn{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;border-radius:11px;padding:9px 14px;font-weight:700;font-size:14px;box-shadow:0 4px 12px #4f46e54d}.login-banner{position:relative;background:linear-gradient(135deg,#eef0ff,#f3f0ff);border:1px solid #E2E0FB;border-radius:18px;padding:16px}.login-banner-ic{width:40px;height:40px;border-radius:12px;background:var(--primary);display:grid;place-items:center;flex-shrink:0;box-shadow:0 4px 12px #4f46e54d}.login-banner-x{position:absolute;top:10px;right:10px;color:var(--muted);display:grid;place-items:center;width:26px;height:26px;border-radius:8px}.login-banner-x:hover{background:#0000000d}.kbd-hint{display:inline-block;margin-left:8px;font-size:11px;font-weight:700;opacity:.7;background:#ffffff40;padding:2px 7px;border-radius:6px}.rate{position:relative}.rate-key{position:absolute;top:5px;right:7px;font-size:10px;font-weight:800;color:var(--muted);background:var(--bg);width:16px;height:16px;border-radius:5px;display:grid;place-items:center}.celebrate-pop{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:var(--display);font-weight:800;font-size:30px;color:var(--primary);pointer-events:none;animation:celebratePop .65s ease both}@keyframes celebratePop{0%{opacity:0;transform:translate(-50%,-50%) scale(.5)}30%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}70%{opacity:1}to{opacity:0;transform:translate(-50%,-70%) scale(1)}}.streak-celebrate{background:#fff4e6;color:#b45309;border:1px solid #FCD9A8;border-radius:12px;padding:10px 16px;font-weight:700;font-size:14px}@media (hover:none){.kbd-hint,.rate-key{display:none}}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.pdf-drop{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;border:2px dashed var(--primary);border-radius:14px;padding:16px;cursor:pointer;color:var(--primary-dark);font-weight:700;font-size:14px;background:#f5f4ff}.pdf-drop:hover{background:#eef0ff}.pdf-pro-locked{display:flex;flex-direction:column;gap:4px;background:#fff7ed;border:1px solid #FCD9A8;border-radius:14px;padding:12px 14px;margin-bottom:4px}.pdf-info{background:#f5f4ff;border:1px solid #E2E0FB;border-radius:12px;padding:12px 14px;margin-bottom:4px}