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@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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components;@layer utilities{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.table{display:table}}:root{--ink:#101828;--muted:#667085;--paper:#f6f7f9;--card:#fff;--line:#e4e7ec;--accent:#2563eb;--accent-soft:#dbeafe;--navy:#111827}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}button,a{font:inherit}button{-webkit-tap-highlight-color:transparent}main{--stage-color:#2563eb;--stage-soft:#dbeafe;min-height:100svh}main.tone-tap{--stage-color:#f97316;--stage-soft:#ffedd5}main.tone-hold{--stage-color:#ef4444;--stage-soft:#fee2e2}main.tone-done{--stage-color:#16a34a;--stage-soft:#dcfce7}.topbar{justify-content:space-between;align-items:center;width:min(100% - 40px,1200px);height:64px;margin:0 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.visual-panel{background:#eff6ff;border-color:#bfdbfe}.tone-tap .visual-panel{background:#fff7ed;border-color:#fed7aa}.tone-hold .visual-panel{background:#fff1f2;border-color:#fecdd3}.tone-done .visual-panel{background:#f0fdf4;border-color:#bbf7d0}.ambient{display:none}.visual-kicker{color:var(--muted);align-items:center;gap:8px;margin:0;font-size:11px;font-weight:700;transition:color .18s;display:flex;position:absolute;top:24px;left:26px}.visual-kicker span{background:var(--stage-color);border-radius:50%;width:8px;height:8px}.phone-stage{place-items:center;width:320px;height:450px;display:grid;position:relative}.phone-shadow{filter:blur(14px);background:#1018282b;border-radius:50%;width:180px;height:24px;position:absolute;bottom:2px}.phone{z-index:2;background:#1d2939;border:2px solid #344054;border-radius:38px;width:196px;height:406px;padding:6px;position:relative;box-shadow:0 20px 45px #1018282e}.screen{width:100%;height:100%;box-shadow:inset 0 0 0 1px var(--stage-color);background:#0b1220;border-radius:30px;position:relative;overflow:hidden}@supports (color:color-mix(in lab, red, red)){.screen{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--stage-color) 55%, transparent)}}.screen{transition:box-shadow .18s}.notch{z-index:2;background:#020617;border-radius:0 0 14px 14px;width:92px;height:22px;position:absolute;top:0;left:50%;transform:translate(-50%)}.screen-glow{background:var(--stage-color);border-radius:50%;width:190px;height:190px;position:absolute;bottom:52px;right:-105px}@supports (color:color-mix(in lab, red, red)){.screen-glow{background:color-mix(in srgb, var(--stage-color) 28%, transparent)}}.screen-glow{filter:blur(14px);transition:background .18s}.screen-copy{flex-direction:column;gap:5px;display:flex;position:absolute;bottom:24px;left:22px}.screen-copy span{color:#667085;letter-spacing:.12em;font-size:9px}.screen-copy strong{color:var(--stage-color)}@supports (color:color-mix(in lab, red, red)){.screen-copy 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28px}.visual-panel{border-radius:18px;min-height:340px}.visual-kicker{top:18px;left:18px}.phone-stage{width:300px;height:400px;transform:scale(.7)}.visual-note{bottom:16px}.guide-panel{place-items:start center;min-height:470px;padding:12px 2px 30px}h1{font-size:42px}.instruction{margin-top:16px;font-size:16px}.space-trigger{grid-template-columns:auto 1fr;padding:13px}.space-trigger kbd{min-width:72px;padding:11px 9px}.space-trigger i{display:none}.timer-number strong{font-size:82px}.auto-sequence{gap:4px}.auto-sequence span{min-height:38px;padding:5px 2px;font-size:8px}.result-checks{grid-template-columns:1fr}footer{align-items:flex-start;gap:16px;min-height:64px;padding:12px 0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.universal-ui .progress-track{z-index:20;position:fixed;top:0;left:0;right:0}.universal-ui .workspace{min-height:100svh;padding-top:40px;padding-bottom:40px}.universal-ui .visual-panel{min-height:660px}.universal-ui .phone-stage{transform:scale(1.08)}.universal-ui .guide-panel{min-height:520px}.symbol-card{flex-direction:column;align-items:center;gap:40px;width:min(100%,430px);display:flex}.universal-trigger{background:var(--navy);cursor:pointer;border:0;border-radius:24px;justify-content:center;align-items:center;gap:34px;width:100%;min-height:150px;padding:28px;transition:transform .15s,box-shadow .15s;display:flex;box-shadow:0 20px 45px #1018281f}.universal-trigger:hover{transform:translateY(-2px);box-shadow:0 24px 52px #1018282b}.universal-trigger:focus-visible{outline:4px solid var(--stage-soft);outline-offset:4px}.keycap-shape{background:#fff;border:2px solid #d0d5dd;border-bottom-width:6px;border-radius:12px;place-items:center;width:190px;height:58px;display:grid;position:relative}.keycap-shape i{border-top:10px solid #0000;border-bottom:10px solid 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red)){.universal-check{box-shadow:inset 0 0 0 2px color-mix(in srgb, var(--stage-color) 24%, transparent)}}.universal-check:after{content:"";border-left:10px solid var(--stage-color);border-bottom:10px solid var(--stage-color);border-radius:4px;width:58px;height:30px;position:absolute;top:49px;left:43px;transform:rotate(-45deg)}.restart-trigger{border-radius:18px;width:230px;min-height:92px;padding:18px}.restart-key{width:150px;height:48px}.restart-key i{border:4px solid var(--stage-color);border-right-color:#0000;border-radius:50%;width:21px;height:21px;transform:none}.restart-key i:after{content:"";border-top:5px solid #0000;border-bottom:5px solid #0000;border-right:8px solid var(--stage-color);width:0;height:0;position:absolute;top:12px;left:68px;transform:rotate(25deg)}@media (width<=900px){.universal-ui .workspace{min-height:auto;padding-top:28px}.universal-ui .visual-panel{min-height:490px}.universal-ui .phone-stage{transform:scale(.92)}}@media (width<=560px){.universal-ui 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