:root{--bg-base: #0E1319;--bg-gradient: radial-gradient(70% 55% at 50% 40%, #1A2430 0%, #0E1319 72%);--text-main: #fff;--text-sub: rgba(255,255,255,.72);--text-weak: rgba(255,255,255,.5);--pill-bg: rgba(255,255,255,.06);--pill-border: rgba(255,255,255,.08);--pill-hover-bg: rgba(255,255,255,.12);--pill-hover-color: #fff;--pad-dock-bg: rgba(255,255,255,.05);--pad-dock-border: rgba(255,255,255,.08);--pad-btn-bg: rgba(255,255,255,.1);--pad-btn-color: #fff;--pad-erase-bg: rgba(255,255,255,.04);--pad-erase-color: rgba(255,255,255,.7);--pad-disabled-opacity: .35;--card-bg: #171F28;--card-border: rgba(255,255,255,.08);--card-subbox-bg: rgba(255,255,255,.05);--row-bg: #161E27;--row-border: rgba(255,255,255,.06);--row-hover-bg: #1C2632;--row-check-bg: rgba(34,197,94,.15);--row-check-color: #4ade80;--row-chevron-color: rgba(255,255,255,.3);--dot-easy: #4ade80;--dot-medium: #fbbf24;--overlay-bg: rgba(10,14,19,.7);--shadow-ellipse: radial-gradient(closest-side, rgba(0,0,0,.5), transparent);--accent: #4f46e5;--font-body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;--font-mono: "Space Grotesk", "Zen Kaku Gothic New", sans-serif}@media(prefers-color-scheme:light){:root{--bg-base: #ECE9E2;--bg-gradient: radial-gradient(75% 60% at 50% 38%, #F2EFE9 0%, #E7E3DA 78%);--text-main: #1E1C18;--text-sub: #6B6559;--text-weak: #A29B8C;--pill-bg: #fff;--pill-border: transparent;--pill-hover-bg: #fff;--pill-hover-color: #1E1C18;--pad-dock-bg: #fff;--pad-dock-border: transparent;--pad-btn-bg: #F4F2EC;--pad-btn-color: #4f46e5;--pad-erase-bg: #FBFAF7;--pad-erase-color: #8A8375;--pad-disabled-opacity: .4;--card-bg: #fff;--card-border: transparent;--card-subbox-bg: #F4F2EC;--row-bg: #fff;--row-border: transparent;--row-hover-bg: #fff;--row-check-bg: #E8F7EE;--row-check-color: #16a34a;--row-chevron-color: #C9C3B4;--dot-easy: #16a34a;--dot-medium: #d97706;--overlay-bg: rgba(236,233,226,.8);--shadow-ellipse: radial-gradient(closest-side, rgba(90,80,60,.28), transparent);--accent: #4f46e5}}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden}body{background:var(--bg-gradient);background-color:var(--bg-base);font-family:var(--font-body);touch-action:none;-webkit-user-select:none;user-select:none}#cube-canvas{display:block;width:100%;height:100%;cursor:grab;-webkit-user-drag:none}#cube-canvas:active{cursor:grabbing}.game-header{position:absolute;top:0;left:0;right:0;z-index:1;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;column-gap:8px;padding:calc(env(safe-area-inset-top,0px) + 14px) 16px 14px}.timer-pill{justify-self:start;display:inline-flex;align-items:center;gap:6px;background:var(--pill-bg);border:1px solid var(--pill-border);border-radius:999px;padding:9px 14px;color:var(--text-main);font-family:var(--font-mono);font-size:14px;font-variant-numeric:tabular-nums}.timer-dot{opacity:.55;font-size:12px}.brand-block{justify-self:center;text-align:center;min-width:0}.brand-block .brand-name{display:block;font-family:var(--font-mono);font-weight:500;font-size:11px;letter-spacing:.28em;color:var(--text-weak)}.brand-block .brand-title{display:block;font-size:14px;font-weight:700;color:var(--text-main);margin-top:2px}.reset-pill{border:none;border-radius:999px;padding:9px 16px;background:var(--pill-bg);border:1px solid var(--pill-border);color:var(--text-main);font-size:13px;font-weight:500;white-space:nowrap}.header-right{justify-self:end;display:flex;align-items:center;gap:8px}.help-pill{flex:0 0 auto;width:34px;height:34px;border-radius:999px;background:var(--pill-bg);border:1px solid var(--pill-border);color:var(--text-main);font-size:14px;font-weight:700}.help-pill.pulse{animation:help-pulse 1.6s ease-out 3}@keyframes help-pulse{0%{box-shadow:0 0 #4f46e58c}70%{box-shadow:0 0 0 10px #4f46e500}to{box-shadow:0 0 #4f46e500}}@media(prefers-reduced-motion:reduce){.help-pill.pulse{animation:none;border-color:var(--accent)}}.cube-shadow{position:absolute;left:50%;bottom:18%;transform:translate(-50%);width:min(50vmin,260px);height:44px;background:var(--shadow-ellipse);pointer-events:none}.nav-pill{position:absolute;left:16px;top:calc(env(safe-area-inset-top,0px) + 64px);z-index:1;border:none;border-radius:999px;padding:11px 18px;background:var(--pill-bg);border:1px solid var(--pill-border);color:var(--text-main);font-size:13px}.pad-dock{position:absolute;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 24px);transform:translate(-50%);z-index:1;display:flex;gap:8px;padding:10px;border-radius:22px;background:var(--pad-dock-bg);border:1px solid var(--pad-dock-border);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.pad-btn{width:52px;height:52px;border:none;border-radius:14px;background:var(--pad-btn-bg);color:var(--pad-btn-color);font-family:var(--font-mono);font-size:22px;font-weight:500}.pad-btn:last-child{background:var(--pad-erase-bg);color:var(--pad-erase-color)}.pad-btn:disabled{opacity:var(--pad-disabled-opacity)}.pad-dock--compact{gap:5px;padding:6px}.pad-dock--compact .pad-btn{width:40px;height:40px;font-size:17px}.daily-win{position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#4f46e5,#4038c7);animation:fadeIn .35s ease}.daily-win-inner{width:100%;max-width:340px;padding:0 24px;text-align:center;animation:cardIn .45s cubic-bezier(.2,.9,.3,1.1)}.daily-win-check{width:64px;height:64px;margin:0 auto 18px;border-radius:50%;background:#ffffff29;color:#fff;display:flex;align-items:center;justify-content:center;font-size:30px;line-height:1}.daily-win-eyebrow{display:block;font-size:11px;letter-spacing:.32em;color:#fff9;font-family:var(--font-mono);font-weight:500;margin-bottom:8px}.daily-win-title{font-size:40px;font-weight:700;color:#fff;margin-bottom:8px}.daily-win-subline{font-size:13px;color:#ffffffa6;margin-bottom:20px}.daily-win-stats{display:flex;gap:8px;margin-bottom:24px}.daily-win-stat{flex:1;background:#ffffff1a;border-radius:14px;padding:14px 8px}.daily-win-stat-value{display:block;font-family:var(--font-mono);font-size:22px;font-weight:700;color:#fff}.daily-win-stat-label{display:block;font-size:11px;color:#ffffff8c;margin-top:2px}.daily-win-share{display:block;width:100%;border:none;background:#fff;color:#4038c7;border-radius:999px;padding:15px;font-size:15px;font-weight:700;margin-bottom:10px}.daily-win-practice{display:block;width:100%;border:1px solid rgba(255,255,255,.3);background:none;color:#fff;border-radius:999px;padding:14px;font-size:14px;font-weight:500;margin-bottom:14px}.daily-win-link{display:block;color:#ffffffa6;text-decoration:none;font-size:13px;margin-bottom:8px}.practice-win{position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;display:flex;align-items:center;justify-content:center;background:var(--overlay-bg);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fadeIn .3s ease}.practice-win-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:24px;padding:32px 28px;width:80%;max-width:300px;text-align:center;animation:cardIn .4s cubic-bezier(.2,.9,.3,1.1)}.practice-win-check{width:52px;height:52px;margin:0 auto 16px;border-radius:50%;background:#4f46e533;color:#a5b4fc;display:flex;align-items:center;justify-content:center;font-size:24px;line-height:1}.practice-win-title{font-size:22px;font-weight:700;color:var(--text-main);margin-bottom:8px}.practice-win-time{font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--text-sub);margin-bottom:20px}.practice-win-cta{display:block;width:100%;border:none;background:var(--accent);color:#fff;border-radius:999px;padding:14px;font-size:14px;font-weight:700}.boot{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.boot-card{text-align:center;color:var(--text-main);padding:24px}.boot-card h1{font-size:18px;font-weight:600;margin-bottom:16px}.boot-loading{color:var(--text-sub);font-weight:400}.boot-retry{display:inline-block;border:none;font-size:14px;padding:12px 24px;margin-bottom:10px;background:var(--accent);color:#fff;border-radius:999px;font-weight:700}.boot-link{display:block;margin:0 auto;border:none;background:none;color:var(--text-sub);font-size:13px}.done{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.done-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:24px;padding:36px 28px;width:80%;max-width:320px;text-align:center;animation:cardIn .4s cubic-bezier(.2,.9,.3,1.1)}.done-eyebrow{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--text-weak);margin-bottom:10px}.done-title{font-size:22px;font-weight:700;color:var(--text-main);margin-bottom:16px}.done-time{font-family:var(--font-mono);font-size:40px;font-weight:700;color:var(--text-main)}.done-time-label{font-size:12px;color:var(--text-weak);margin-bottom:4px}.done-streak{font-size:13px;font-weight:600;color:var(--dot-medium);margin-bottom:16px}.done-subbox{display:flex;align-items:center;justify-content:space-between;background:var(--card-subbox-bg);border-radius:12px;padding:12px;font-size:12px;color:var(--text-sub);margin:16px 0}.done-countdown{font-family:var(--font-mono);font-size:16px;font-weight:700;color:var(--text-main)}.done-cta{display:block;width:100%;border:none;background:var(--accent);color:#fff;border-radius:999px;padding:14px;font-size:14px;font-weight:700}.list{position:absolute;top:0;right:0;bottom:0;left:0;overflow-y:auto;touch-action:pan-y;max-width:480px;margin:0 auto;padding:calc(env(safe-area-inset-top,16px) + 24px) 20px 40px}.list-head{margin-bottom:16px}.list-back{border:1px solid var(--pill-border);border-radius:999px;padding:11px 18px;background:var(--pill-bg);color:var(--text-main);font-size:13px}.list-back:hover{background:var(--pill-hover-bg);color:var(--pill-hover-color)}.list-title{color:var(--text-main);font-size:26px;font-weight:700}.list-summary{color:var(--text-weak);font-size:13px;margin:4px 0 0}.list-section-head{display:flex;align-items:center;gap:8px;color:var(--text-main);font-size:14px;font-weight:700;margin:24px 0 8px}.list-dot{width:8px;height:8px;border-radius:50%;flex:none}.list-dot-easy{background:var(--dot-easy)}.list-dot-medium{background:var(--dot-medium)}.list-row{display:flex;align-items:center;justify-content:space-between;width:100%;background:var(--row-bg);border:1px solid var(--row-border);border-radius:16px;padding:16px 18px;margin-bottom:8px}.list-row:hover{background:var(--row-hover-bg)}.list-row-left{display:flex;align-items:center;gap:10px}.list-num{font-family:var(--font-mono);font-size:18px;font-weight:700;color:var(--text-main)}.list-badge{font-size:12px;font-weight:500}.list-badge-easy{color:var(--dot-easy)}.list-badge-medium{color:var(--dot-medium)}.list-check{display:flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;background:var(--row-check-bg);color:var(--row-check-color);font-size:14px;font-weight:700}.list-chevron{color:var(--row-chevron-color);font-size:18px}@keyframes cardIn{0%{opacity:0;transform:translateY(14px) scale(.97)}to{opacity:1;transform:none}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.tut{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;display:flex;flex-direction:column;background:var(--bg-gradient);background-color:var(--bg-base)}.tut-canvas{flex:1;width:100%;min-height:120px;touch-action:none}.tut-panel{flex:0 0 auto;max-height:60vh;overflow-y:auto;padding:20px 22px calc(22px + env(safe-area-inset-bottom,0px));background:var(--card-bg);border-top:1px solid var(--card-border);border-radius:20px 20px 0 0}.tut-dots{display:flex;gap:6px;margin-bottom:14px}.tut-dot{width:6px;height:6px;border-radius:50%;background:var(--text-sub);opacity:.28}.tut-dot.on{opacity:1}.tut-title{font-size:18px;font-weight:700;color:var(--text-main);margin-bottom:8px}.tut-body{font-size:14px;line-height:1.7;color:var(--text-sub);margin-bottom:8px}.tut-actions{display:flex;gap:10px;align-items:center;margin-top:16px}.tut-skip{flex:0 0 auto;padding:12px 16px;border:none;background:none;font-size:14px;color:var(--text-sub)}.tut-back{flex:0 0 auto;padding:12px 16px;border:none;background:none;font-size:14px;color:var(--text-sub);cursor:pointer}.tut-next{flex:1;border:none;border-radius:999px;padding:14px;background:var(--accent);color:#fff;font-size:14px;font-weight:700}