/* Deuterium SI - Learn / Tutorials styles. Reuses tokens from styles.css. */
.draft-banner{background:var(--amber-tint);border-bottom:1px solid rgba(217,148,0,.45);color:var(--graphite);font-size:.84rem;font-weight:600;padding:8px 0;text-align:center}
.draft-banner strong{color:#8a5d00}
.brand-link img.brand-logo-img{width:180px;height:auto;display:block}
.footer-brand img.brand-logo-img{width:190px;height:auto;display:block;margin-bottom:14px}
.nav-links a.active{color:var(--teal);border-bottom-color:var(--amber-deep)}
.placeholder-positioning{outline:1.5px dashed rgba(217,148,0,.75);outline-offset:4px;border-radius:4px}
.ph-tag{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:#8a5d00;background:var(--amber-tint);border:1px solid rgba(217,148,0,.45);border-radius:4px;padding:1px 6px;margin-left:6px;vertical-align:middle}
/* Hub */
.learn-hero{padding:56px 0 48px;border-bottom:1px solid var(--border-light);background:radial-gradient(circle at 85% 10%,rgba(10,124,112,.07) 0%,transparent 45%),var(--paper)}
.learn-hero h1{font-size:clamp(2.2rem,4vw,3.2rem);font-weight:800;letter-spacing:-.025em;line-height:1.08;margin-bottom:16px;max-width:820px}
.learn-hero .hero-lead{max-width:700px}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:26px 0 8px}
.filter-bar .label{font-size:.82rem;font-weight:700;color:var(--graphite-soft);margin-right:4px}
.chip{font-family:inherit;font-size:.84rem;font-weight:600;color:var(--graphite);background:#fff;border:1px solid var(--border-light);border-radius:999px;padding:6px 13px;cursor:pointer}
.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip.active{background:var(--teal);border-color:var(--teal);color:#fff}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.t-card{background:#fff;border:1px solid var(--border-light);border-top:4px solid var(--teal);border-radius:var(--radius-md);padding:24px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-sm);color:inherit}
.t-card:hover{box-shadow:var(--shadow-md);border-color:var(--teal-border)}
.t-card.planned{border-top-color:var(--border-strong);opacity:.8}
.t-card h3{font-size:1.15rem}
.t-card p{font-size:.9rem}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;font-size:.78rem;font-weight:600;color:var(--graphite-soft)}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:.75rem;font-weight:650;padding:2px 9px;border-radius:999px;border:1px solid var(--border-light);background:var(--paper);color:var(--graphite)}
.pill.level-beginner{background:var(--teal-subtle);border-color:var(--teal-border);color:var(--teal)}
.pill.level-intermediate{background:var(--amber-tint);border-color:rgba(217,148,0,.4);color:#8a5d00}
.pill.draft{background:#fff3f0;border-color:#f0c4b8;color:#a33a1c}
.browse-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.browse-box{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);padding:24px}
.browse-box h3{font-size:1.05rem;margin-bottom:12px}
.browse-box ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.feed{display:grid;gap:12px}
.feed-item{background:var(--carbon-card);border:1px solid var(--carbon-border);border-left:3px solid var(--teal-light);border-radius:var(--radius-md);padding:16px 18px}
.feed-item .when{font-size:.76rem;color:var(--amber-signal);font-weight:650}
.feed-item h4{color:#fff;font-size:1rem;margin:3px 0}
.feed-item p{color:var(--text-on-dark-muted);font-size:.86rem}
/* App CTA */
.app-cta{background:var(--carbon);border:1px solid var(--carbon-border);border-radius:var(--radius-lg);padding:32px;color:var(--text-on-dark);display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}
.app-cta h2,.app-cta h3{color:#fff}
.app-cta p{color:var(--text-on-dark-muted)}
.store-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.store-badge{display:inline-flex;align-items:center;gap:8px;border:1px dashed var(--carbon-border);border-radius:8px;padding:8px 14px;font-size:.82rem;font-weight:650;color:var(--text-on-dark-muted)}
/* Tutorial page */
.t-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:44px;align-items:start;padding:44px 0 72px}
.breadcrumbs{font-size:.82rem;color:var(--graphite-soft);margin-bottom:14px}
.breadcrumbs a{color:var(--graphite-soft)}
.breadcrumbs a:hover{color:var(--teal)}
.t-header h1{font-size:clamp(2rem,3.4vw,2.7rem);font-weight:800;letter-spacing:-.025em;line-height:1.1;margin-bottom:12px}
.t-summary{font-size:1.1rem;margin-bottom:18px}
.fact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px 0 26px}
.fact{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:10px 12px}
.fact .k{display:block;font-size:.72rem;font-weight:700;color:var(--graphite-soft);text-transform:uppercase;letter-spacing:.04em}
.fact .v{display:block;font-size:.92rem;font-weight:650;color:var(--graphite);margin-top:2px}
.draft-note{background:#fff3f0;border:1px solid #f0c4b8;border-left:4px solid #c2451f;border-radius:var(--radius-sm);padding:12px 16px;font-size:.88rem;color:var(--graphite);margin-bottom:22px}
.draft-note strong{color:#a33a1c}
.t-body h2{font-size:1.45rem;font-weight:800;margin:36px 0 12px;scroll-margin-top:100px}
.t-body h3{font-size:1.1rem;margin:0 0 6px}
.t-body p{margin-bottom:12px}
.t-body ul.plain{margin:0 0 14px 20px;color:var(--graphite-muted)}
.t-body ul.plain li{margin-bottom:6px}
.box{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);padding:18px 20px;margin-bottom:14px}
.steps{list-style:none;counter-reset:step;display:grid;gap:16px}
.steps>li{counter-increment:step;background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);padding:20px 20px 18px 66px;position:relative}
.steps>li::before{content:counter(step);position:absolute;left:18px;top:18px;width:32px;height:32px;border-radius:50%;background:var(--teal);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:.95rem}
.steps>li p,.steps>li li{font-size:.95rem}
.steps>li ul{margin:4px 0 10px 18px;color:var(--graphite-muted)}
.ui{font-weight:700;color:var(--graphite);background:var(--paper-alt);border:1px solid var(--border-light);border-radius:4px;padding:0 5px;font-size:.9em;white-space:nowrap}
.shot{margin-top:10px;border:1.5px dashed var(--border-strong);border-radius:var(--radius-sm);background:repeating-linear-gradient(45deg,var(--paper),var(--paper) 10px,var(--paper-alt) 10px,var(--paper-alt) 20px);padding:22px 16px;text-align:center;font-size:.8rem;font-weight:650;color:var(--graphite-soft)}
.prompt-box{background:var(--carbon);color:var(--text-on-dark);border-radius:var(--radius-sm);padding:14px 16px;font-size:.88rem;line-height:1.55;margin:8px 0 10px;white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;position:relative}
.copy-btn{position:absolute;top:8px;right:8px;font-family:inherit;font-size:.72rem;font-weight:700;background:var(--carbon-card);color:var(--teal-light);border:1px solid var(--carbon-border);border-radius:4px;padding:3px 8px;cursor:pointer}
.callout{border-radius:var(--radius-md);padding:16px 18px;margin-bottom:14px;border:1px solid}
.callout.tip{background:var(--teal-subtle);border-color:var(--teal-border)}
.callout.warn{background:var(--amber-tint);border-color:rgba(217,148,0,.4)}
.callout h3{font-size:1rem;margin-bottom:6px}
.callout ul{margin-left:18px}
.callout li{font-size:.92rem;color:var(--graphite-muted);margin-bottom:5px}
.sources{font-size:.86rem}
.sources li{margin-bottom:6px;word-break:break-word}
.faq details{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:10px}
.faq summary{font-weight:700;cursor:pointer;color:var(--graphite)}
.faq details p{margin:8px 0 0;font-size:.94rem}
.t-aside{position:sticky;top:110px;display:grid;gap:16px}
.toc{background:#fff;border:1px solid var(--border-light);border-radius:var(--radius-md);padding:18px}
.toc h4{font-size:.85rem;margin-bottom:10px}
.toc ol{margin-left:18px;font-size:.86rem;display:grid;gap:5px}
.toc a{color:var(--graphite-muted)}
.toc a:hover{color:var(--teal)}
.verify-box{background:#fff;border:1px solid var(--border-light);border-left:4px solid var(--amber-deep);border-radius:var(--radius-md);padding:16px;font-size:.84rem;color:var(--graphite-muted)}
.verify-box strong{color:var(--graphite)}
.mini-cta{background:var(--carbon);border-radius:var(--radius-md);padding:18px;color:var(--text-on-dark)}
.mini-cta h4{color:#fff;font-size:.98rem;margin-bottom:6px}
.mini-cta p{color:var(--text-on-dark-muted);font-size:.84rem;margin-bottom:12px}
.disclaimer{font-size:.78rem;color:var(--graphite-soft);border-top:1px solid var(--border-light);padding-top:14px;margin-top:30px}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.footer-legal{font-size:.76rem;color:var(--text-on-dark-muted);margin-top:14px;max-width:900px;line-height:1.5}
@media (max-width:980px){.card-grid{grid-template-columns:1fr 1fr}.t-layout{grid-template-columns:1fr}.t-aside{position:static}.app-cta{grid-template-columns:1fr}.fact-grid{grid-template-columns:1fr 1fr}.browse-grid{grid-template-columns:1fr}}
@media (max-width:640px){.card-grid,.related-grid{grid-template-columns:1fr}.nav-actions .btn{display:none}.steps>li{padding:56px 16px 16px 16px}.steps>li::before{left:16px;top:14px}.app-cta{padding:22px}}
.su-note{font-size:.78rem;color:var(--text-on-dark-muted);line-height:1.45;margin:0}.su-note strong{color:var(--amber-signal)}
.site-header .nav-links{gap:22px}
.site-header .nav-links a,.site-header .nav-email{white-space:nowrap}
.site-header .nav-actions{gap:14px}
@media (max-width:1240px){.site-header .nav-actions a.nav-email[href^="mailto"]{display:none}}
.prev-next{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:30px 0 6px}.prev-next .btn{white-space:normal;text-align:left}