:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;text-rendering:optimizelegibility;--ink:#172033;--muted:#667085;--muted-strong:#475467;--page:#f3f5f9;--panel:#ffffffe0;--panel-solid:#fff;--line:#10182821;--accent:#4d68e8;--accent-light:#4059c7;--success:#16865c;--on-accent:#fff;--surface-soft:#1018280a;--surface-hover:#10182813;--stage:#ffffff9e;--dialog:#fff;--dialog-backdrop:#17203375;--toast:#fffffff5;--error-ink:#a4212b;--error-surface:#e3263614;--error-line:#e3263647;--body-glow-1:#596fca21;--body-glow-2:#3c8c9714;--radius-lg:28px;--radius-md:18px;--shadow:0 24px 70px #1f2a4426;font-family:Inter,SF Pro Display,SF Pro Text,PingFang SC,Microsoft YaHei,system-ui,sans-serif}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#f7f8fb;--muted:#a8b3c7;--muted-strong:#c4ccda;--page:#09101f;--panel:#121b2edb;--panel-solid:#121b2e;--line:#ffffff1f;--accent:#5c7cff;--accent-light:#9aafff;--success:#53d59a;--surface-soft:#ffffff0b;--surface-hover:#ffffff14;--stage:#0c14259e;--dialog:#111a2d;--dialog-backdrop:#030711bd;--toast:#141e32f5;--error-ink:#ffc2c4;--error-surface:#e5484d17;--error-line:#e5484d59;--body-glow-1:#3953a533;--body-glow-2:#23536f1f;--shadow:0 28px 80px #00000057}*{box-sizing:border-box}html{background:var(--page);min-height:100%}body{min-width:320px;min-height:100vh;color:var(--ink);background:radial-gradient(circle at 74% 22%, var(--body-glow-1), transparent 34%), radial-gradient(circle at 10% 88%, var(--body-glow-2), transparent 30%), var(--page);margin:0;overflow-x:hidden}#app{flex-direction:column;min-height:100vh;display:flex}button,input,select{font:inherit}button{color:inherit}button:focus-visible{outline-offset:3px;outline:3px solid #8fa5ffe6}.site-header{z-index:10;width:min(1440px,100%);height:82px;padding:max(18px, env(safe-area-inset-top)) clamp(20px, 4vw, 64px) 12px;justify-content:space-between;align-items:center;margin:0 auto;display:flex;position:relative}.brand{letter-spacing:.02em;cursor:pointer;background:0 0;border:0;align-items:center;gap:11px;padding:4px;font-size:17px;font-weight:720;display:inline-flex}.brand-mark{border:1px solid var(--line);background:var(--surface-soft);border-radius:8px;grid-template-columns:repeat(3,1fr);gap:2px;width:28px;height:28px;padding:4px;display:grid;transform:rotate(-8deg)}.brand-mark i{background:var(--brand-color);border-radius:2px}.header-actions{align-items:center;gap:10px;display:flex}.settings-button{border:1px solid var(--line);min-height:34px;color:var(--muted-strong);background:var(--surface-soft);cursor:pointer;border-radius:999px;align-items:center;gap:7px;padding:0 12px;display:inline-flex}.phase-badge{border:1px solid var(--line);color:var(--muted-strong);background:var(--surface-soft);letter-spacing:.04em;border-radius:999px;padding:8px 12px;font-size:12px}.screen{flex:1;width:100%}.landing{grid-template-columns:minmax(330px,.78fr) minmax(480px,1.22fr);align-items:center;gap:clamp(20px,5vw,84px);width:min(1360px,100%);min-height:calc(100vh - 82px);margin:0 auto;padding:2vh clamp(24px,6vw,96px) 7vh;display:grid}.hero-copy{z-index:2;padding-bottom:6vh;position:relative}.eyebrow,.section-kicker{color:var(--accent-light);letter-spacing:.16em;text-transform:uppercase;margin:0 0 14px;font-size:12px;font-weight:760}.hero-copy h1{letter-spacing:-.055em;margin:0;font-size:clamp(48px,6.2vw,84px);font-weight:760;line-height:1.04}.hero-copy h1 span{color:var(--accent-light)}.hero-description{max-width:520px;color:var(--muted-strong);margin:28px 0 0;font-size:clamp(15px,1.45vw,18px);line-height:1.8}.primary-button{color:#fff;background:var(--accent);cursor:pointer;border:0;border-radius:14px;justify-content:center;align-items:center;gap:34px;min-height:54px;padding:0 22px;font-weight:720;transition:transform .18s,background .18s;display:inline-flex;box-shadow:0 16px 34px #3c59da47}.primary-button:hover{background:#6b87ff;transform:translateY(-2px)}.hero-button{margin-top:34px}.hero-meta{color:var(--muted);flex-wrap:wrap;gap:9px 20px;margin-top:34px;font-size:12px;display:flex}.hero-meta span:before{content:"";background:var(--success);vertical-align:1px;border-radius:50%;width:5px;height:5px;margin-right:8px;display:inline-block}.hero-stage{justify-content:center;align-items:center;min-width:0;height:min(72vh,720px);display:flex;position:relative}.cube-canvas{touch-action:none;-webkit-user-select:none;user-select:none;position:relative}.cube-canvas:before{content:"";pointer-events:none;background:radial-gradient(circle,#778fdd29,#0000 66%);border-radius:50%;position:absolute;inset:8%}.cube-canvas canvas{z-index:1;cursor:grab;width:100%;height:100%;display:block;position:relative}.cube-canvas canvas:active{cursor:grabbing}.landing-canvas{width:100%;height:100%}.gesture-hint{border:1px solid var(--line);color:var(--muted);background:var(--panel);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);white-space:nowrap;pointer-events:none;border-radius:999px;margin:0;padding:8px 13px;font-size:12px;position:absolute;bottom:4%;left:50%;transform:translate(-50%)}.order-dialog{border:1px solid var(--line);width:min(760px,100% - 32px);color:var(--ink);background:var(--dialog);box-shadow:var(--shadow);border-radius:26px;margin:auto;padding:0}.order-dialog::backdrop{background:var(--dialog-backdrop);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.order-dialog form{padding:clamp(24px,4vw,38px)}.dialog-header{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.dialog-header h2{letter-spacing:-.035em;margin:0;font-size:clamp(24px,4vw,34px)}.icon-button{border:1px solid var(--line);width:36px;height:36px;color:var(--muted-strong);background:var(--surface-soft);cursor:pointer;border-radius:50%;flex:none;font-size:24px;line-height:1}.order-grid{grid-template-columns:repeat(2,1fr);gap:12px;margin-top:28px;display:grid}.orientation-page{min-height:calc(100vh - 82px);padding:clamp(24px, 5vw, 72px) 20px max(40px, env(safe-area-inset-bottom));place-items:center;display:grid}.orientation-card{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);width:min(760px,100%);box-shadow:var(--shadow);padding:clamp(26px,5vw,54px)}.orientation-card .eyebrow{margin-top:36px}.orientation-card h1{letter-spacing:-.05em;margin:0;font-size:clamp(32px,6vw,52px);line-height:1.08}.orientation-selects{grid-template-columns:1fr 1fr;gap:14px;margin-top:32px;display:grid}.orientation-selects label{color:var(--muted-strong);gap:9px;font-size:12px;display:grid}.orientation-selects select{border:1px solid var(--line);min-height:50px;color:var(--ink);background:var(--panel-solid);border-radius:12px;padding:0 14px}.orientation-preview{min-height:112px;color:var(--muted-strong);background:#5c7cff12;border:1px solid #5c7cff40;border-radius:14px;margin:18px 0;padding:18px;line-height:1.6}.orientation-preview strong{color:var(--ink);display:block}.orientation-preview div{flex-wrap:wrap;gap:8px 14px;margin-top:12px;display:flex}.orientation-preview span,.orientation-instruction{color:var(--muted);font-size:11px}.orientation-preview i{background:var(--dot);border-radius:3px;width:8px;height:8px;margin-right:6px;display:inline-block}.orientation-card>.primary-button{width:100%}.orientation-card>.validation-errors{margin:0 0 16px}.order-card{text-align:left;border:1px solid var(--line);background:var(--surface-soft);border-radius:18px;flex-direction:column;align-items:flex-start;min-height:184px;padding:20px;display:flex}.order-card strong{letter-spacing:-.04em;font-size:32px}.order-card span{color:var(--muted);margin-top:10px;font-size:13px}.order-card em{color:var(--muted);margin-top:auto;font-size:12px;font-style:normal}.order-card.active{cursor:pointer;background:#5c7cff1f;border-color:#6f8bffb8}.order-card.active em{color:var(--accent-light)}.order-card:disabled{opacity:.52}.dialog-note{color:var(--muted);margin:20px 2px 0;font-size:12px;line-height:1.65}.entry-layout{grid-template-columns:minmax(0,1fr) minmax(330px,390px);gap:clamp(20px,3vw,42px);width:min(1440px,100%);min-height:calc(100vh - 82px);margin:0 auto;padding:12px clamp(20px,4vw,64px) 40px;display:grid}.entry-stage-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--stage);min-width:0;min-height:690px;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff09}.entry-heading{z-index:2;align-items:flex-start;gap:24px;display:flex;position:absolute;top:28px;left:30px}.entry-heading .eyebrow{margin-bottom:7px}.entry-heading h1{letter-spacing:-.035em;margin:0;font-size:clamp(23px,2.4vw,32px);line-height:1.18}.back-button{border:1px solid var(--line);min-height:34px;color:var(--muted-strong);background:var(--surface-soft);cursor:pointer;border-radius:10px;padding:0 10px}.orientation-strip{z-index:2;color:var(--muted);gap:13px;font-size:11px;display:flex;position:absolute;top:31px;right:28px}.orientation-strip button{color:var(--accent-light);cursor:pointer;background:0 0;border:0;padding:0;font-size:11px}.order-4 .orientation-strip{top:82px}.orientation-instruction{z-index:2;pointer-events:none;margin:0;position:absolute;top:111px;right:28px}.orientation-strip span,.count-color{align-items:center;gap:7px;display:inline-flex}.orientation-strip i,.count-color i{background:var(--dot);border:1px solid #ffffff59;border-radius:3px;width:8px;height:8px;display:inline-block}.entry-canvas{width:100%;height:100%;min-height:690px}.stage-footer{z-index:2;color:var(--muted);pointer-events:none;justify-content:space-between;gap:18px;font-size:11px;display:flex;position:absolute;bottom:24px;left:28px;right:28px}.stage-footer p{margin:0}.control-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);align-self:start}.panel-section{border-bottom:1px solid var(--line);padding:22px 24px}.section-title-row,.section-label{justify-content:space-between;align-items:center;gap:20px;display:flex}.section-kicker{margin-bottom:7px;font-size:10px}.section-title-row h2{letter-spacing:-.04em;margin:0;font-size:32px}.section-title-row h2 small{color:var(--muted);letter-spacing:0;margin-left:5px;font-size:13px;font-weight:500}.progress-ring{--progress:40deg;background:conic-gradient(var(--accent) var(--progress), var(--surface-hover) 0);border-radius:50%;place-items:center;width:52px;height:52px;display:grid;position:relative}.progress-ring:after{content:"";border-radius:inherit;background:var(--panel-solid);position:absolute;inset:5px}.progress-ring span{z-index:1;color:var(--muted-strong);font-size:10px}.progress-track{background:var(--surface-hover);border-radius:99px;height:4px;margin-top:17px;overflow:hidden}.progress-track span{border-radius:inherit;background:var(--accent);width:0;height:100%;transition:width .22s;display:block}.fixed-centers-note{color:var(--muted);margin:10px 0 0;font-size:9px;line-height:1.5}.section-label{margin-bottom:16px}.section-label h3{margin:0;font-size:13px;font-weight:680}.section-label span{color:var(--muted);font-size:10px}.color-palette{grid-template-columns:repeat(6,1fr);gap:7px;display:grid}.color-swatch{cursor:pointer;background:0 0;border:1px solid #0000;border-radius:10px;flex-direction:column;align-items:center;gap:6px;min-width:0;padding:6px 2px 5px;display:flex}.color-swatch span{border:2px solid var(--line);background:var(--swatch);border-radius:9px;width:30px;height:30px;box-shadow:inset 0 0 0 1px #0000001a}.color-swatch b{color:var(--muted);font-size:9px;font-weight:560}.color-swatch.is-selected{background:#5c7cff1f;border-color:#8fa5ffa6}.color-swatch.is-selected b{color:var(--ink)}.count-section{padding-bottom:18px}.color-counts{grid-template-columns:1fr 1fr;gap:8px 18px;display:grid}.count-row{grid-template-columns:1fr auto;align-items:center;gap:3px 8px;min-width:0;padding:7px 0;display:grid}.count-color{color:var(--muted-strong);font-size:11px}.count-row strong{font-variant-numeric:tabular-nums;font-size:12px}.count-row strong small{color:var(--muted);font-size:9px;font-weight:500}.remaining{color:var(--muted);grid-column:1/-1;font-size:9px}.panel-actions{grid-template-columns:1fr 1fr;gap:9px;padding:18px 24px 12px;display:grid}.state-tools{grid-template-columns:1fr 1fr;gap:9px;padding:0 24px 14px;display:grid}.state-tools .secondary-button:last-of-type{grid-column:1/-1}.secondary-button{border:1px solid var(--line);min-height:42px;color:var(--muted-strong);background:var(--surface-soft);cursor:pointer;border-radius:11px}.secondary-button:hover:not(:disabled){color:var(--ink);background:var(--surface-hover)}.secondary-button:disabled{opacity:.38;cursor:not-allowed}.secondary-button.wide{grid-column:1/-1}.save-status{color:var(--muted);text-align:center;margin:0;padding:4px 24px 18px;font-size:10px}.save-status span{background:var(--success);border-radius:50%;width:6px;height:6px;margin-right:5px;display:inline-block}.future-button{width:calc(100% - 48px);min-height:52px;color:var(--muted);text-align:left;background:#ffffff06;border:1px dashed #ffffff26;border-radius:13px;justify-content:space-between;align-items:center;margin:0 24px 24px;padding:0 16px;display:flex}.future-button span{font-size:9px}.validation-errors,.solver-status{border-radius:12px;margin:0 24px 14px;padding:14px 15px;font-size:11px;line-height:1.6}.solver-status>div{flex:1;min-width:0}.cancel-solve{flex:none;min-height:32px;padding:0 10px}.validation-errors{border:1px solid var(--error-line);color:var(--error-ink);background:var(--error-surface)}.validation-errors strong{color:var(--ink);margin-bottom:6px;display:block}.validation-errors ul{max-height:150px;margin:0;padding-left:18px;overflow:auto}.solver-status{background:#5c7cff14;border:1px solid #5c7cff4d;align-items:center;gap:12px;display:flex}.solver-status[hidden],.validation-errors[hidden],.solver-diagnostics[hidden]{display:none}.solver-diagnostics{background:var(--stage);color:var(--muted);border:1px solid #5c7cff3d;border-radius:12px;margin:0 24px 14px;font-size:10px}.solver-diagnostics summary{color:var(--ink);cursor:pointer;-webkit-user-select:none;user-select:none;padding:10px 12px}.solver-diagnostics pre{max-height:210px;color:var(--muted-strong);white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:0 12px 12px;font:9px/1.55 Consolas,SFMono-Regular,monospace;overflow:auto}.playback-panel>.solver-diagnostics{margin:0 24px 16px}.solver-status strong,.solver-status small{display:block}.solver-status small{color:var(--muted);margin-top:2px;font-size:9px}.solver-spinner{border:2px solid #ffffff29;border-top-color:var(--accent-light);border-radius:50%;flex:none;width:18px;height:18px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.solve-button{color:#fff;background:var(--accent);cursor:pointer;border:0;border-radius:13px;justify-content:space-between;align-items:center;width:calc(100% - 48px);min-height:54px;margin:0 24px 24px;padding:0 16px;font-weight:700;display:flex;box-shadow:0 14px 30px #3c59da38}.solve-button span{opacity:.82;font-size:9px;font-weight:560}.solve-button:disabled{opacity:.55;cursor:wait}.playback-layout{grid-template-columns:minmax(0,1fr) minmax(360px,430px);gap:clamp(20px,3vw,42px);width:min(1440px,100%);min-height:calc(100vh - 82px);margin:0 auto;padding:12px clamp(20px,4vw,64px) 40px;display:grid}.playback-stage-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--stage);min-width:0;min-height:690px;position:relative;overflow:hidden}.playback-canvas{width:100%;height:100%;min-height:690px}.playback-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);align-self:start;overflow:hidden}.playback-summary{border-bottom:1px solid var(--line);grid-template-columns:1fr auto auto;align-items:center;gap:16px;padding:22px 24px;display:grid}.playback-summary h2{letter-spacing:-.04em;margin:0;font-size:32px}.playback-summary h2 small{color:var(--muted);font-size:13px}.solve-metric{border-left:1px solid var(--line);text-align:right;min-width:62px;padding-left:14px}.solve-metric strong,.solve-metric span{display:block}.solve-metric strong{font-variant-numeric:tabular-nums;font-size:14px}.solve-metric span{color:var(--muted);margin-top:3px;font-size:8px}.move-focus{border-bottom:1px solid var(--line);grid-template-columns:92px 1fr;align-items:center;gap:18px;padding:24px;display:grid}.move-focus>div:first-child{background:#5c7cff1a;border:1px solid #5c7cff52;border-radius:18px;align-content:center;place-items:center;min-height:92px;display:grid}.move-focus span,.move-focus small{color:var(--muted);font-size:9px}.move-focus strong{margin-top:4px;font-size:32px}.move-explanation span,.move-explanation small{display:block}.move-explanation span{color:var(--ink);font-size:13px;line-height:1.6}.move-explanation small{margin-top:8px}.move-explanation b{color:var(--accent-light)}.formula-panel{border-bottom:1px solid var(--line);padding:20px 24px}.formula-text{max-height:124px;color:var(--muted-strong);background:var(--surface-soft);border-radius:11px;padding:12px;font-family:SFMono-Regular,Consolas,monospace;font-size:12px;line-height:2.05;overflow:auto}.formula-move{border-radius:4px;padding:3px 4px}.formula-move.is-complete{color:var(--success)}.formula-move.is-current{color:#fff;background:var(--accent)}.transport-controls{grid-template-columns:38px 1fr 1.1fr 1fr 38px;gap:6px;padding:18px 18px 10px;display:grid}.transport-controls button{border:1px solid var(--line);min-height:42px;color:var(--muted-strong);background:var(--surface-soft);cursor:pointer;border-radius:10px}.transport-controls .play-button,.transport-controls [data-action=pause]{color:#fff;background:var(--accent);border-color:#0000}.transport-controls button:disabled{opacity:.34;cursor:not-allowed}.playback-options{grid-template-columns:1fr 1fr;gap:10px;padding:8px 24px 24px;display:grid}.playback-options label{border:1px solid var(--line);min-height:42px;color:var(--muted);border-radius:11px;justify-content:space-between;align-items:center;padding:0 10px;font-size:10px;display:flex}.playback-options select{color:var(--ink);background:0 0;border:0}.playback-options option{color:#111827}.playback-home{width:calc(100% - 48px);margin:0 24px 24px}.site-footer{min-height:54px;padding:12px 20px max(14px, env(safe-area-inset-bottom));color:var(--muted);text-align:center;justify-content:center;align-items:center;gap:7px;font-size:11px;line-height:1.4;display:flex}.gpt-mark{fill:none;stroke:currentColor;stroke-width:1.5px;stroke-linejoin:round;flex:none;width:16px;height:16px}.settings-dialog,.confirm-dialog{border:1px solid var(--line);width:min(600px,100% - 28px);max-height:min(760px,100% - 28px);color:var(--ink);background:var(--dialog);box-shadow:var(--shadow);border-radius:24px;margin:auto;padding:clamp(22px,4vw,34px);overflow:auto}.settings-dialog::backdrop{background:var(--dialog-backdrop);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.confirm-dialog::backdrop{background:var(--dialog-backdrop);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.settings-group{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;margin-top:18px;padding:18px 0;display:flex}.settings-group label,.danger-zone>div{gap:5px;display:grid}.settings-group label span,.danger-zone span,.confirm-dialog p{color:var(--muted);font-size:12px;line-height:1.65}.settings-group select{border:1px solid var(--line);min-width:132px;min-height:42px;color:var(--ink);background:var(--panel-solid);border-radius:10px;padding:0 34px 0 12px}.switch-setting input{appearance:none;border:1px solid var(--line);background:var(--surface-hover);cursor:pointer;border-radius:99px;flex:none;width:48px;height:28px;margin:0;transition:background .16s;position:relative}.switch-setting input:after{content:"";background:var(--panel-solid);border-radius:50%;width:20px;height:20px;transition:transform .16s;position:absolute;top:3px;left:4px;box-shadow:0 2px 8px #00000038}.switch-setting input:checked{background:var(--accent)}.switch-setting input:checked:after{transform:translate(19px)}.danger-zone{border:1px solid var(--error-line);background:var(--error-surface);border-radius:14px;justify-content:space-between;align-items:center;gap:20px;margin-top:8px;padding:18px;display:flex}.danger-button{color:#fff;cursor:pointer;background:#c92936;border:1px solid #e326368c;border-radius:10px;flex:none;min-height:42px;padding:0 14px}.danger-button:disabled{opacity:.55;cursor:wait}.confirm-dialog h2{letter-spacing:-.03em;margin:0;font-size:clamp(22px,4vw,30px)}.confirm-dialog p{margin:14px 0 0}.confirm-actions{flex-wrap:wrap;justify-content:flex-end;gap:9px;margin-top:24px;display:flex}.confirm-actions button{padding-left:14px;padding-right:14px}.toast{z-index:30;max-width:min(420px,100% - 32px);right:24px;bottom:max(24px, env(safe-area-inset-bottom));border:1px solid var(--line);color:var(--ink);background:var(--toast);opacity:0;pointer-events:none;border-radius:12px;padding:12px 16px;font-size:12px;transition:opacity .18s,transform .18s;position:fixed;transform:translateY(10px);box-shadow:0 16px 40px #00000057}.toast.is-visible{opacity:1;transform:translateY(0)}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}@media (max-width:980px){.landing{grid-template-columns:.85fr 1.15fr;padding-left:32px;padding-right:24px}.hero-copy h1{font-size:clamp(42px,6vw,62px)}.entry-layout{grid-template-columns:1fr}.entry-stage-panel,.entry-canvas{min-height:620px}.control-panel{grid-template-columns:1fr 1fr;display:grid}.progress-section,.panel-actions,.state-tools,.save-status,.future-button{grid-column:1/-1}.panel-section:nth-child(2){border-right:1px solid var(--line)}.future-button{width:calc(100% - 48px)}.playback-layout{grid-template-columns:1fr}.playback-stage-panel,.playback-canvas{min-height:620px}}@media (max-width:720px){.site-header{height:68px;padding:max(14px, env(safe-area-inset-top)) 18px 8px}.phase-badge{text-overflow:ellipsis;white-space:nowrap;max-width:144px;overflow:hidden}.settings-button span:last-child{display:none}.settings-button{justify-content:center;width:36px;padding:0}.landing{min-height:calc(100svh - 68px);padding:28px 20px max(32px, env(safe-area-inset-bottom));grid-template-rows:auto minmax(320px,46vh);grid-template-columns:1fr;gap:0}.hero-copy{padding:0}.hero-copy h1{font-size:clamp(42px,12vw,62px)}.hero-description{margin-top:18px;font-size:14px;line-height:1.65}.hero-button{width:100%;margin-top:24px}.hero-meta{justify-content:center;margin-top:20px}.hero-stage{height:auto;min-height:320px}.gesture-hint{bottom:1%}.order-dialog form{padding:24px 18px}.order-grid{grid-template-columns:1fr}.order-card{min-height:112px}.order-card em{margin-top:16px}.orientation-page{min-height:calc(100svh - 68px);padding:12px 12px max(24px, env(safe-area-inset-bottom))}.orientation-card{border-radius:22px;padding:24px 18px}.orientation-card .eyebrow{margin-top:28px}.orientation-selects{grid-template-columns:1fr}.entry-layout,.playback-layout{min-height:calc(100svh - 68px);min-height:calc(100dvh - 68px);padding:6px 10px max(16px, env(safe-area-inset-bottom));gap:6px}.playback-stage-panel,.playback-canvas{height:clamp(340px, calc(100svh - 208px - env(safe-area-inset-bottom)), 600px);min-height:0}.playback-stage-panel,.playback-panel{border-radius:22px}.playback-panel{flex-direction:column;display:flex}.transport-controls{border-bottom:0;order:1;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;padding:8px 8px 4px}.transport-controls [data-action=first],.transport-controls [data-action=last]{display:none}.transport-controls button{touch-action:manipulation;min-width:0;min-height:48px;padding:0 8px;font-size:13px}.playback-options{border-bottom:1px solid var(--line);order:2;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:6px;padding:3px 8px 8px}.playback-options button,.playback-options label{min-width:0;min-height:46px}.playback-options label{padding:0 10px;font-size:11px}.playback-options select{text-align:right;width:64px;max-width:52%;font-size:16px}.playback-summary{order:3;grid-template-columns:1fr auto auto;gap:8px;padding:11px 14px}.playback-summary h2{font-size:24px}.playback-summary h2 small{font-size:11px}.solve-metric{min-width:54px;padding-left:9px}.move-focus{order:4;grid-template-columns:72px 1fr;gap:12px;padding:14px}.move-focus>div:first-child{border-radius:14px;min-height:68px}.move-focus strong{font-size:25px}.formula-panel{order:5;padding:15px 14px}.playback-panel>.solver-diagnostics{order:6;margin:0 14px 14px}.playback-home{width:calc(100% - 28px);margin:0 14px max(14px, env(safe-area-inset-bottom));order:7}.entry-stage-panel,.entry-canvas{height:clamp(370px, calc(100svh - 180px - env(safe-area-inset-bottom)), 620px);min-height:0}.entry-stage-panel{border-radius:22px}.entry-heading{gap:12px;top:18px;left:16px}.entry-heading .eyebrow{display:none}.entry-heading h1{margin-top:5px;font-size:19px}.orientation-strip{justify-content:center;top:66px;left:16px;right:16px}.order-4 .orientation-strip{white-space:nowrap;justify-content:flex-start;top:64px;overflow-x:auto}.orientation-instruction{text-align:center;text-overflow:ellipsis;white-space:nowrap;top:96px;left:16px;right:16px;overflow:hidden}.stage-footer{justify-content:center;bottom:15px;left:16px;right:16px}.stage-footer p:last-child{display:none}.control-panel{border-radius:22px;flex-direction:column;display:flex}.control-panel>*{order:3}.control-panel>.panel-section:nth-child(2){order:1;padding:9px 10px 10px}.control-panel>.progress-section{order:2}.control-panel>.panel-section:nth-child(2) .section-label{margin-bottom:7px}.control-panel>.panel-section:nth-child(2) .color-swatch{touch-action:manipulation;min-height:48px;padding-top:4px;padding-bottom:4px}.toast{white-space:nowrap;text-overflow:ellipsis;text-align:center;border-radius:9px;max-width:calc(100% - 48px);padding:7px 11px;font-size:11px;line-height:1.3;inset:184px auto auto 50%;overflow:hidden;transform:translate(-50%,-6px);box-shadow:0 8px 22px #0000003d}.toast.is-visible{transform:translate(-50%)}.settings-group,.danger-zone{flex-direction:column;align-items:stretch}.settings-group select,.danger-button{width:100%}.switch-setting{flex-direction:row;align-items:center}.switch-setting input{width:48px}.confirm-actions{display:grid}.panel-section:nth-child(2){border-right:0}}@media (max-width:390px){.phase-badge{display:none}.color-palette{gap:3px}.color-swatch span{width:28px;height:28px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}