.ba-home,.ba-page{--ba-ink:#244a68;--ba-muted:#526d80;--ba-paper:#fffdf5;--ba-line:#bdd3df;--ba-wash:#e3f1ef;--ba-accent:#226c59;color:var(--ba-ink)}
.unified-ui .ba-page .primary,.unified-ui .ba-home .primary{background:#246a59;color:#fff}
html[data-theme=dark] .unified-ui :is(.ba-home,.ba-page) .primary{background:#a5deca;color:#173b31}
body[data-page=brain-age] .sidebar{display:none}
body[data-page=brain-age] .main{margin-left:0;width:100%;max-width:900px;margin-right:auto;margin-left:auto}
.ba-home{margin:22px 0 0;padding:22px;border:1px solid #aaccc6;border-radius:22px;background:linear-gradient(115deg,#e0f1e9,#eef5fb);overflow:hidden}
.ba-home-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.ba-home-heading>div{min-width:0}.ba-home h2{font-size:25px;line-height:1.4;margin:7px 0}.ba-home p{font-size:16px;line-height:1.6}.ba-eyebrow{font-size:13px;line-height:1.6;color:var(--ba-accent);font-weight:600}.ba-home-actions{display:flex;align-items:center;gap:16px;margin-top:18px;flex-wrap:wrap}.ba-home .primary{background:#246a59;min-height:50px;padding:10px 20px;font-size:18px}.ba-home .link-btn{color:var(--ba-accent);min-height:44px}.ba-home .ba-disclaimer{margin:13px 0 0;font-size:13px;color:var(--ba-muted)}
.ba-mark{position:relative;display:block;width:112px;height:124px;flex:none}.ba-mark svg{display:block;width:100%;height:100%;overflow:visible}.ba-art-halo{fill:#cde8de;opacity:.6}.ba-art-orbit{stroke:#70a999;opacity:.65}.ba-art-paper{fill:#fffdf5;stroke:#8db9aa;stroke-width:1.5}.ba-art-face{fill:#dcefe6}.ba-art-outline{stroke:#286d5b}.ba-art-dot{fill:#286d5b}.ba-art-gold{fill:#e9bc63}.ba-art-target{stroke:#cf9145}.ba-art-shadow{fill:#437866;opacity:.12}.ba-intro-title>.ba-mark{width:144px;height:150px}

.ba-page{max-width:680px;margin:auto}.ba-page>.page-heading{gap:10px;align-items:center;margin-bottom:22px}.ba-page h1{font-size:23px;letter-spacing:0}.ba-mini{font-size:13px;color:var(--ba-muted)}.ba-intro-title{text-align:center;margin:25px 0}.ba-intro-title>.ba-mark{margin:0 auto 20px}.ba-intro-title h2{font-size:25px;margin-bottom:10px}.ba-intro-title p,.ba-note{color:var(--ba-muted);font-size:16px;line-height:1.7}.ba-steps{list-style:none;padding:0;margin:20px 0}.ba-steps li{display:flex;gap:16px;align-items:flex-start;padding:20px 0;border-bottom:1px solid var(--ba-line)}.ba-steps li>b{color:var(--ba-accent);font-size:23px}.ba-steps h3{font-size:21px;margin:0 0 5px}.ba-steps p{font-size:17px;line-height:1.7}.ba-page .ba-note{margin:18px 0}.ba-disclaimer{font-size:14px;line-height:1.7;color:var(--ba-muted);margin:16px 0}.ba-page .primary{background:#246a59}.ba-page .secondary{background:var(--ba-paper);color:var(--ba-ink);border-color:var(--ba-line)}
.ba-history{margin:32px 0}.ba-history h2{font-size:23px}.ba-history button{display:flex;width:100%;align-items:center;justify-content:space-between;gap:15px;padding:17px 0;border-bottom:1px solid var(--ba-line);text-align:left;font-size:18px;color:var(--ba-ink)}.ba-history small{display:block;margin-top:5px;font-size:14px;color:var(--ba-muted)}.ba-history h2 small{display:inline}.ba-history strong{white-space:nowrap}
.ba-play .game-head{margin-bottom:18px;gap:8px}.ba-play .game-head h2{font-size:23px}.ba-play .game-head .secondary{padding:8px 12px;min-height:46px;font-size:17px}.ba-progress{display:flex;align-items:center;gap:9px;font-size:15px;margin:14px 0 18px;color:var(--ba-muted)}.ba-progress span{padding:7px 9px;border-radius:20px;background:var(--ba-paper);white-space:nowrap}.ba-progress span.active{color:var(--ba-accent);background:var(--ba-wash);font-weight:bold}.ba-progress span.complete{color:var(--ba-accent)}.ba-progress>i{width:12px;height:1px;background:var(--ba-line)}.ba-progress>strong{margin-left:auto;font-size:14px;white-space:nowrap}
.ba-game-surface{background:var(--ba-paper);border:1px solid var(--ba-line);border-radius:24px;padding:18px;position:relative;overflow:hidden}.ba-instruction{min-height:83px;text-align:center;margin-bottom:12px}.ba-instruction strong{font-size:21px;line-height:1.5}.ba-instruction p{font-size:16px;line-height:1.6;margin-top:7px;color:var(--ba-muted)}.ba-reaction{width:100%;height:240px;border:2px solid var(--ba-line);border-radius:20px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;background:#e5ecf3;color:#38536b;touch-action:manipulation;position:relative}.ba-reaction>span:first-child{font-size:48px;line-height:1.2}.ba-reaction>strong{font-size:30px}.ba-reaction.ready{background:#246a59;color:white;border-color:#246a59}.ba-reaction:disabled{opacity:1}.ba-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;max-width:390px;margin:auto}.ba-grid>button{position:relative;aspect-ratio:1;min-width:0;background:#edf3f8;color:#244a68;border:2px solid #bdd3df;border-radius:13px;font-size:34px;font-weight:600;touch-action:manipulation;padding:0}.ba-grid .done{background:#d1e7df;color:#376153;opacity:1;border-color:#91b7aa}.ba-game-surface .ba-coach-target{outline:3px solid #bc8526;outline-offset:-4px}.ba-finger{position:absolute;right:8%;bottom:5%;font-size:40px;color:#ffdd79;line-height:1;pointer-events:none;text-shadow:0 2px 2px #244a6855;animation:ba-tap 1.3s infinite}.ba-pause{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:15px;background:#183b5066;backdrop-filter:blur(1px)}.ba-pause>span{background:var(--ba-paper);color:var(--ba-ink);padding:7px 12px;border-radius:20px;font-size:14px}
.ba-report-hero{background:var(--ba-wash);border:1px solid var(--ba-line);border-radius:24px;text-align:center;padding:28px 18px;margin:20px 0}.ba-age{font-size:76px;font-weight:750;color:var(--ba-accent);line-height:1.4}.ba-age small{font-size:23px;margin-left:8px}.ba-report-hero h2{font-size:22px;margin-bottom:14px}.ba-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.ba-result-grid>section{padding:20px 16px;background:var(--ba-paper);border:1px solid var(--ba-line);border-radius:20px;min-width:0}.ba-result-grid span{font-size:16px;color:var(--ba-muted)}.ba-result-grid h3{font-size:35px;margin:12px 0}.ba-result-grid h3 small{font-size:15px;font-weight:400}.ba-result-grid p{font-size:15px;line-height:1.8}.ba-bar{height:6px;border-radius:6px;background:var(--ba-line);margin-bottom:16px;overflow:hidden}.ba-bar i{display:block;height:100%;background:var(--ba-accent)}.ba-comparison,.ba-advice{padding:24px 0;border-bottom:1px solid var(--ba-line)}.ba-comparison h2,.ba-advice h2{font-size:22px;margin-bottom:12px}.ba-comparison p,.ba-advice p{font-size:17px;line-height:1.8}.ba-method{margin:24px 0;font-size:16px;line-height:1.8}.ba-method summary{padding:12px 0;font-weight:600;cursor:pointer}.ba-method p{margin:12px 0}.ba-home-return{margin-top:12px}.ba-exit{max-width:min(420px,calc(100vw - 32px))}.ba-exit::backdrop{background:#162f4b80}
.large .ba-page p,.large .ba-home p{font-size:19px}.large .ba-page .ba-disclaimer,.large .ba-home .ba-disclaimer{font-size:16px}.large .ba-page .ba-mini{display:none}.large .ba-home .ba-eyebrow{font-size:15px}.large .ba-result-grid{grid-template-columns:1fr}.large .ba-instruction{min-height:100px}
html[data-theme=dark] :is(.ba-home,.ba-page){--ba-ink:#e4edf5;--ba-muted:#b3c5d4;--ba-paper:#1b2936;--ba-line:#496175;--ba-wash:#243e3c;--ba-accent:#a5deca}
html[data-theme=dark] .ba-home{background:linear-gradient(120deg,#1b3532,#1e3042);border-color:#496175}html[data-theme=dark] .ba-art-halo{fill:#416f63}html[data-theme=dark] .ba-art-orbit{stroke:#87b9a9}html[data-theme=dark] .ba-art-paper{fill:#29493f;stroke:#79a897}html[data-theme=dark] .ba-art-face{fill:#365d4f}html[data-theme=dark] .ba-art-outline{stroke:#c4ead8}html[data-theme=dark] .ba-art-dot{fill:#c4ead8}html[data-theme=dark] .ba-art-target{stroke:#f1c77b}
html[data-theme=dark] :is(.ba-home,.ba-page) .primary{background:#a5deca;color:#173b31}html[data-theme=dark] .ba-grid>button{background:#293e4e;color:#edf6fb;border-color:#58738a}html[data-theme=dark] .ba-grid .done{background:#2d4c43;color:#b8dccd;border-color:#658d80}html[data-theme=dark] .ba-reaction{background:#2a3e50;color:#dcebf7;border-color:#58738a}html[data-theme=dark] .ba-reaction.ready{background:#a5deca;color:#173b31;border-color:#a5deca}html[data-theme=dark] .ba-finger{color:#ffcd63}
@keyframes ba-tap{50%{transform:translateY(-7px)}}@media(prefers-reduced-motion:reduce){.ba-finger{animation:none}}
@media(max-width:380px){.ba-home{padding:18px 16px}.ba-home h2{font-size:23px}.ba-home-heading{gap:6px}.ba-home-heading>.ba-mark{width:96px;height:114px}.ba-home .ba-eyebrow{font-size:12px}.ba-mini{display:none}.ba-page h1{font-size:22px}.ba-result-grid{grid-template-columns:1fr}.ba-game-surface{padding:14px 12px}.ba-progress{gap:5px;font-size:14px}.ba-progress span{padding:6px}.ba-progress>i{width:6px}.ba-reaction{height:220px}.ba-instruction strong{font-size:20px}}

@media(max-width:360px){.ba-home .ba-mark{width:92px;height:110px}.ba-home-heading{gap:8px}}

/* Gentle visual invitation; controls and status never move. */
.ba-aurora-wash{fill:#cce9e2;opacity:.34}.ba-aurora-track{fill:none;stroke:#9ac9bc;stroke-width:1;opacity:.6}.ba-art-status{position:absolute;left:50%;bottom:0;transform:translateX(-50%);display:flex;align-items:center;justify-content:center;gap:5px;white-space:nowrap;min-width:76px;padding:5px 9px;border:1px solid #a4cbbc;border-radius:18px;background:#f4fbf6;color:#286d5b;font-size:13px;line-height:1.3;font-weight:650;box-shadow:0 3px 10px #244e3d0a}.ba-art-status i{width:5px;height:5px;border-radius:50%;background:#3a9878;flex:none}
.ba-aurora-orbit{transform-origin:72px 66px;animation:ba-orbit 8s linear infinite}.ba-art-float{animation:ba-float 6s ease-in-out infinite}.ba-clock-hand{transform-origin:48px 62px;animation:ba-hand 8s ease-in-out infinite}.ba-target-glow{fill:#e6b354;opacity:.06;animation:ba-focus-glow 8s ease-in-out infinite}.ba-mark .ba-art-motion{animation-play-state:paused}.ba-mark[data-art-running=true] .ba-art-motion{animation-play-state:running}
@keyframes ba-orbit{to{transform:rotate(360deg)}}@keyframes ba-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-2px)}}@keyframes ba-hand{0%,15%,45%,100%{transform:rotate(0deg)}25%,35%{transform:rotate(18deg)}}@keyframes ba-focus-glow{0%,50%,90%,100%{opacity:.06}65%,75%{opacity:.26}}
html[data-theme=dark] .ba-aurora-wash{fill:#4f8a80;opacity:.22}html[data-theme=dark] .ba-aurora-track{stroke:#7ab8b0;opacity:.45}html[data-theme=dark] .ba-art-status{background:#234339;border-color:#618c7e;color:#d2efe0}html[data-theme=dark] .ba-art-status i{background:#95d5b7}.large .ba-art-status{font-size:14px}
@media(prefers-reduced-motion:reduce){.ba-mark .ba-art-motion{animation:none!important}.ba-target-glow{opacity:.1}}

/* Compact test cards and a viewport-anchored start action. */
.ba-intro{padding-bottom:calc(100px + env(safe-area-inset-bottom,0px))}
.ba-intro .ba-intro-title{text-align:left;margin:18px 0 20px}.ba-intro .ba-intro-title h2{font-size:23px;line-height:1.45;margin:7px 0}.ba-intro .ba-intro-title p{font-size:16px}
.ba-intro .ba-test-cards{display:grid;gap:12px;margin:0}.ba-intro .ba-test-cards li{display:flex;align-items:center;gap:16px;border:1px solid var(--ba-line);border-radius:20px;background:var(--ba-paper);padding:16px}
.ba-test-cover{width:90px;height:100px;flex:none;display:grid;place-items:center;border-radius:15px;background:#e9f3ed}.ba-focus-cover{background:#edf3f9}.ba-test-cover svg{width:86px;height:86px}
.ba-test-label{color:var(--ba-muted);font-size:13px}.ba-intro .ba-test-cards h3{font-size:20px;line-height:1.4;margin:4px 0}.ba-intro .ba-test-cards p{font-size:15px;line-height:1.5;margin:0}.ba-test-cards small{display:block;margin-top:7px;color:var(--ba-accent);font-size:13px}.ba-intro .ba-intro-note{font-size:14px;margin:15px 0}
.ba-start-dock{position:fixed;z-index:15;left:0;right:0;bottom:0;padding:12px 20px calc(12px + env(safe-area-inset-bottom,0px));background:var(--ba-paper);border-top:1px solid var(--ba-line);box-shadow:0 -6px 24px #244a6809}.ba-start-dock .primary{display:block;max-width:640px;margin:0 auto;min-height:54px;font-size:20px}
.large .ba-test-cards h3{font-size:22px}.large .ba-test-cards p{font-size:17px}.large .ba-test-cards small,.large .ba-test-label{font-size:15px}
@media(max-width:360px){.ba-intro .ba-test-cards li{padding:12px;gap:10px}.ba-test-cover{width:66px;height:88px}.ba-test-cover svg{width:64px;height:64px}.ba-intro .ba-intro-title h2{font-size:21px}.ba-intro .ba-test-cards h3{font-size:18px}.large .ba-test-cards h3{font-size:20px}.ba-start-dock{padding-left:14px;padding-right:14px}}

@media(max-height:650px){.ba-intro>.page-heading{margin-bottom:12px}.ba-intro .ba-intro-title{margin:10px 0 12px}.ba-intro .ba-test-cards{gap:10px}.ba-intro .ba-test-cards li{padding:10px}.ba-intro .ba-intro-note{margin:10px 0}}