:root{--bg: #f5f6f8;--surface: #ffffff;--surface-2: #f2f4f7;--line: #e8ebf0;--line-strong: #dfe3ea;--text: #121821;--text-2: #3a4452;--muted: #8a93a2;--accent: #2f6bff;--accent-press: #1f54e0;--accent-soft: #eaf0ff;--good: #16a34a;--good-soft: #e9f7ee;--warn: #d97706;--warn-soft: #fdf2e3;--bad: #e5484d;--radius: 18px;--shadow-sm: 0 1px 2px rgba(18, 24, 33, .05);--shadow: 0 4px 18px rgba(18, 24, 33, .07);--shadow-accent: 0 6px 18px rgba(47, 107, 255, .28);font-family:Pretendard,-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,system-ui,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;letter-spacing:-.01em}.app{max-width:480px;margin:0 auto;padding:18px 18px 60px;min-height:100%}.topbar{display:flex;align-items:center;justify-content:space-between;padding:6px 2px 16px}.brand{font-weight:800;font-size:19px;letter-spacing:-.03em;color:var(--text)}.brand .beta{font-size:10px;color:var(--accent);background:var(--accent-soft);padding:3px 7px;border-radius:999px;margin-left:7px;font-weight:800;vertical-align:middle;letter-spacing:.02em}.topbar .meta{font-size:12.5px;color:var(--muted);text-align:right;font-weight:600}button{font-family:inherit;cursor:pointer;border:none;-webkit-tap-highlight-color:transparent}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:15px 18px;border-radius:14px;font-weight:700;font-size:15.5px;background:var(--surface);color:var(--text);border:1px solid var(--line-strong);width:100%;transition:transform .06s ease,background .15s,box-shadow .15s;letter-spacing:-.01em}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:var(--shadow-accent)}.btn.primary:active{background:var(--accent-press)}.btn.success{background:var(--good);border-color:var(--good);color:#fff;box-shadow:0 6px 18px #16a34a42}.btn.ghost{background:var(--surface);color:var(--text-2)}.btn.sm{padding:10px 14px;font-size:13.5px;width:auto;border-radius:11px;box-shadow:none}.btn:disabled{opacity:.45}.row{display:flex;gap:10px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:14px 0;box-shadow:var(--shadow-sm)}.tag{display:inline-block;font-size:12.5px;color:var(--accent);background:var(--accent-soft);padding:5px 11px;border-radius:999px;margin:0 6px 6px 0;font-weight:700}.topic{font-size:13px;color:var(--muted);margin-bottom:8px;font-weight:600}.qtext{font-size:15.5px;line-height:1.75;color:var(--text-2)}.proof{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.6}.muted{color:var(--muted);font-size:12.5px}.cd-title{font-size:13px;color:var(--warn);font-weight:800}.countdown{display:flex;gap:8px;justify-content:center;margin:16px 0}.cd-box{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 10px;min-width:60px;box-shadow:var(--shadow-sm)}.cd-box .n{font-size:24px;font-weight:800;color:var(--text);letter-spacing:-.03em;font-variant-numeric:tabular-nums}.cd-box .l{font-size:10.5px;color:var(--muted);font-weight:700;letter-spacing:.05em;margin-top:2px}.cloze{font-size:16.5px;line-height:2.35;color:var(--text)}.blank-input{display:inline-block;min-width:72px;width:auto;background:var(--surface-2);border:1.5px solid transparent;border-bottom:2px solid var(--accent);color:var(--accent);font:inherit;font-weight:700;text-align:center;padding:3px 8px;margin:0 3px;border-radius:8px}.blank-input:focus{outline:none;background:var(--accent-soft)}.blank-input.ok{border-bottom-color:var(--good);color:var(--good);background:var(--good-soft)}.blank-input.bad{border-bottom-color:var(--bad);color:var(--bad);background:#fdeced}.blank-shown{display:inline-block;color:var(--muted);border-bottom:1.5px dashed var(--line-strong);padding:0 4px}.blank-reveal{color:var(--good);font-weight:800}.slider-row{display:flex;align-items:center;gap:12px;margin:14px 0 2px;font-size:12.5px;color:var(--muted);font-weight:600}input[type=range]{flex:1;accent-color:var(--accent);height:4px}.feedback{margin-top:14px;padding:13px 14px;border-radius:12px;font-size:14px;font-weight:600}.feedback.ok{background:var(--good-soft);color:var(--good)}.feedback.mid{background:var(--warn-soft);color:var(--warn)}.answerbox{margin-top:12px;padding:14px;background:var(--surface-2);border-radius:12px;font-size:14px;line-height:1.65;color:var(--text-2)}.answerbox .src{color:var(--muted);font-size:12px;margin-top:8px}.review-flag{font-size:11px;color:var(--warn);margin-top:8px;font-weight:600}.flash{min-height:190px;display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer;-webkit-user-select:none;user-select:none;padding:8px}.flash .front{font-size:18.5px;font-weight:700;line-height:1.55;color:var(--text)}.flash .back{font-size:15.5px;line-height:1.75;color:var(--text-2)}.flash .hint{font-size:12px;color:var(--muted);margin-top:14px;font-weight:600}.nav{display:flex;justify-content:space-between;gap:10px;margin-top:12px}.modebar{display:flex;gap:4px;background:var(--surface-2);border-radius:13px;padding:4px;margin-bottom:10px}.modebar button{flex:1;padding:10px;border-radius:10px;background:transparent;color:var(--muted);font-weight:700;font-size:14px;transition:background .15s,color .15s}.modebar button.active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow-sm)}.toolbar{display:flex;gap:6px;margin-bottom:10px}.toolbar button{flex:1;padding:11px 6px;border-radius:12px;background:var(--surface);border:1px solid var(--line);color:var(--text-2);font-weight:700;font-size:13px;transition:all .15s}.toolbar button.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:var(--shadow-accent)}.badge{display:inline-block;min-width:18px;padding:0 5px;margin-left:5px;border-radius:999px;background:var(--bad);color:#fff;font-size:11px;font-weight:800;line-height:18px}.toolbar button.active .badge{background:#ffffff47}.deck-label{font-size:12.5px;color:var(--muted);margin:2px 2px 10px;font-weight:600}.progressbar{height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin:2px 0 14px}.progressbar>span{display:block;height:100%;background:var(--accent);border-radius:999px;transition:width .3s ease}.tagwrap{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.tagchip{padding:9px 13px;border-radius:999px;border:1px solid var(--line-strong);background:var(--surface);color:var(--text-2);font-size:13px;font-weight:600;transition:all .12s}.tagchip.on{background:var(--accent);border-color:var(--accent);color:#fff}.tagchip .c{color:var(--muted);font-size:11px;margin-left:5px}.tagchip.on .c{color:#ffffffbf}.statpanel .head{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-bottom:10px;font-weight:600}.statpanel .mine{color:var(--accent);font-weight:800}.lp-dist{margin-top:8px}.lp-distrow{display:flex;align-items:center;gap:10px;margin:7px 0;font-size:12px}.lp-distrow .dl{width:56px;color:var(--muted);font-weight:600}.lp-distrow .db{flex:1;height:9px;background:var(--surface-2);border-radius:999px;overflow:hidden}.lp-distrow .db>span{display:block;height:100%;background:var(--accent);border-radius:999px}.lp-distrow .dv{width:36px;text-align:right;color:var(--text-2);font-weight:700}.empty{text-align:center;color:var(--muted);padding:30px 10px;font-size:14px;line-height:1.7}.footer{text-align:center;color:var(--muted);font-size:11px;margin-top:22px;line-height:1.7}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#1218216b;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;align-items:flex-end;justify-content:center;z-index:50}.sheet{background:var(--surface);width:100%;max-width:480px;border-radius:22px 22px 0 0;padding:24px 20px 30px;box-shadow:0 -8px 40px #1218212e;animation:slideup .25s ease}@keyframes slideup{0%{transform:translateY(24px);opacity:.6}to{transform:translateY(0);opacity:1}}.sheet h2{font-size:21px;margin:2px 0 6px;letter-spacing:-.03em}.sheet p{color:var(--muted);font-size:14px;margin:4px 0 16px;line-height:1.6}.price{font-size:32px;font-weight:800;color:var(--text);letter-spacing:-.03em}.price small{font-size:14px;color:var(--muted);font-weight:600}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 4px}.chip{padding:10px 14px;border-radius:999px;border:1px solid var(--line-strong);background:var(--surface);color:var(--text-2);font-size:13px;font-weight:600;transition:all .12s}.chip.on{background:var(--accent);border-color:var(--accent);color:#fff}.field{width:100%;padding:13px;border-radius:12px;background:var(--surface);border:1px solid var(--line-strong);color:var(--text);font:inherit;margin:7px 0}.field:focus{outline:none;border-color:var(--accent)}html,body{overflow-x:hidden}.lp{max-width:1140px;margin:0 auto;padding:0 24px 90px}.lp-nav{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:16px 0;background:#f5f6f8d1;-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px)}.lp-nav .brand{font-size:21px}.lp-nav-actions{display:flex;gap:10px}.lp .sub{color:var(--text-2);font-size:16px;line-height:1.7;margin:8px 0 14px}.lp-body{font-size:15px;line-height:1.85;color:var(--muted);margin:16px 0 20px}.lp h2{font-size:26px;line-height:1.32;letter-spacing:-.035em;font-weight:800;margin:0 0 10px;color:var(--text)}.lp-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;padding:44px 0 60px}.lp-hero-text{text-align:left}.lp-hero-text h1{font-size:46px;line-height:1.16;letter-spacing:-.045em;font-weight:800;margin:18px 0 14px;color:var(--text)}.lp-cta-row{display:flex;gap:12px;margin:24px 0 14px;flex-wrap:wrap}.lp-cta-row .btn{width:auto}.lp-hero-visual{display:flex;flex-direction:column;gap:16px}.lp-sec{padding:60px 0;border-top:1px solid var(--line)}.lp-sec-head{text-align:center;max-width:700px;margin:0 auto 30px}.lp-sec-cta{text-align:center;margin-top:30px}.lp-sec-cta .btn,.lp-band .btn{width:auto;display:inline-flex}.lp-split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}.lp-split .lp-body{text-align:left}.lp-featgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.lp-feat{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm)}.lp-feat .ic{font-size:26px}.lp-feat .ft{font-weight:800;margin:12px 0 5px;font-size:16px;letter-spacing:-.02em}.lp-feat .fd{color:var(--muted);font-size:13.5px;line-height:1.6}.lp-benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.lp-benefit{display:block;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow-sm)}.lp-benefit .bn{display:block;font-size:26px;font-weight:800;color:var(--accent);margin-bottom:12px}.lp-benefit .bt{font-weight:800;font-size:17px;margin-bottom:8px;letter-spacing:-.02em}.lp-benefit .bd{color:var(--muted);font-size:14px;line-height:1.65}.lp-subjects{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.lp-subject{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;opacity:.62;box-shadow:var(--shadow-sm);text-align:center}.lp-subject.on{opacity:1;border-color:var(--accent);background:var(--accent-soft)}.lp-subject .st{font-weight:800;letter-spacing:-.02em;font-size:16px}.lp-subject .ss{font-size:12.5px;color:var(--muted);margin-top:6px;font-weight:600}.lp-subject.on .ss{color:var(--accent)}.lp-band{position:relative;left:50%;transform:translate(-50%);width:100vw;padding:70px 24px;margin:8px 0}.lp-band-inner{max-width:1140px;margin:0 auto}.lp-band.center .lp-band-inner{max-width:760px;text-align:center}.lp-band.accent{background:var(--accent-soft)}.lp-band.warn{background:var(--warn-soft)}.lp-band.warn h2{color:#b45309}.lp-band.dark{background:var(--text)}.lp-band.dark h2,.lp-band.dark .price{color:#fff}.lp-band.dark .sub{color:#ffffffbd}.lp-band.dark .lp-body{color:#fff9}.lp-band.dark .proof{color:#ffffff7a}.lp-band-split{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}.lp-demo .cloze{font-size:16px;line-height:2.3}.lp-footer{border-top:1px solid var(--line);padding-top:36px;margin-top:30px;display:grid;grid-template-columns:1.4fr 1fr;gap:30px}.lp-footer .ft-head{font-weight:800;font-size:16px;letter-spacing:-.02em}.lp-footer .ft-legal{color:var(--muted);font-size:11.5px;line-height:1.9;margin-top:14px}@media (max-width: 880px){.lp{padding:0 18px 70px}.lp-hero{grid-template-columns:1fr;gap:28px;padding:24px 0 36px;text-align:center}.lp-hero-text{text-align:center}.lp-hero-text h1{font-size:32px}.lp-cta-row{justify-content:center}.lp-split,.lp-band-split,.lp-footer{grid-template-columns:1fr;gap:26px}.lp-featgrid{grid-template-columns:1fr 1fr}.lp-benefits{grid-template-columns:1fr}.lp-subjects{grid-template-columns:1fr 1fr}.lp-sec{padding:44px 0}.lp h2{font-size:23px}.lp-band{padding:48px 18px}}@media (max-width: 520px){.lp-featgrid{grid-template-columns:1fr}.lp-cta-row{flex-direction:column}.lp-cta-row .btn,.lp-sec-cta .btn,.lp-band .btn,.lp-nav-actions .btn{width:100%}.lp-nav-actions{gap:6px}}