:root{--rr-red:#E41E26;--rr-black:#111111;--rr-slate:#6B7280;--rr-light:#F4F5F7;--rr-white:#FFFFFF;--rr-border:#E5E7EB}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--rr-black);font-family:Arial,Helvetica,sans-serif}
.rr-nav-active{background:var(--rr-red)!important;color:#fff!important}
.rr-learn-main{max-width:1180px;margin:0 auto;padding:36px 22px 70px}
.rr-learn-hero{background:linear-gradient(135deg,#111 0%,#222 68%,#3a0b0d 100%);color:#fff;border-radius:24px;padding:58px 56px;position:relative;overflow:hidden;box-shadow:0 18px 45px rgba(0,0,0,.13)}
.rr-learn-hero:after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:rgba(228,30,38,.18)}
.rr-learn-kicker{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--rr-red);margin-bottom:12px}
.rr-learn-hero h1{font-size:clamp(36px,6vw,66px);line-height:1.02;max-width:760px;margin:0 0 20px;letter-spacing:-.04em}
.rr-learn-hero p{font-size:19px;line-height:1.65;max-width:760px;color:#e5e7eb;margin:0}
.rr-learn-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.rr-btn-primary,.rr-btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:999px;text-decoration:none;font-weight:800}
.rr-btn-primary{background:var(--rr-red);color:#fff}.rr-btn-primary:hover{filter:brightness(.94)}
.rr-btn-secondary{background:#fff;color:#111}.rr-btn-secondary:hover{background:#f4f5f7}
.rr-learn-intro{padding:48px 8px 20px;max-width:820px}.rr-learn-intro h2{font-size:32px;margin:0 0 10px}.rr-learn-intro p{color:#4b5563;line-height:1.7;font-size:17px}
.rr-learning-paths{display:grid;gap:26px;margin-top:16px}.rr-learning-section{border:1px solid var(--rr-border);border-radius:20px;padding:28px;background:#fff}.rr-learning-section-head{display:grid;grid-template-columns:280px 1fr;gap:30px;align-items:start;margin-bottom:22px}.rr-learning-section-head h2{margin:0;font-size:25px}.rr-learning-section-head p{margin:0;color:#6b7280;line-height:1.6}
.rr-guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.rr-guide-card{position:relative;border:1px solid var(--rr-border);border-radius:16px;padding:22px;background:var(--rr-light);min-height:180px}.rr-guide-card h3{font-size:20px;margin:28px 0 8px}.rr-guide-card p{color:#59616d;line-height:1.55;margin:0 0 16px}.rr-guide-status{position:absolute;top:18px;left:20px;font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--rr-red)}.rr-guide-card a{font-weight:800;color:var(--rr-red);text-decoration:none}.rr-guide-disabled{font-size:13px;color:#8b93a0;font-weight:700}
.rr-learn-next{margin-top:34px;border-radius:20px;background:#f8f8f8;padding:32px;display:grid;grid-template-columns:1.15fr .85fr;gap:32px}.rr-learn-next h2{font-size:30px;margin:0 0 12px}.rr-learn-next p{color:#59616d;line-height:1.65}.rr-learn-next ol{margin:0;padding-left:22px;display:grid;gap:10px;font-weight:700}
.rr-guide-status-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px;background:#f7f7f7}.rr-guide-status-page h1{font-size:38px;margin:22px 0 10px}.rr-guide-status-page p{color:#616975;margin-bottom:25px}.rr-status-brand{font-size:28px;font-weight:900;text-decoration:none;color:#111}.rr-status-brand span{color:var(--rr-red)}
@media(max-width:780px){.rr-learn-main{padding:22px 14px 48px}.rr-learn-hero{padding:38px 24px;border-radius:18px}.rr-learn-hero p{font-size:17px}.rr-learning-section{padding:20px}.rr-learning-section-head,.rr-learn-next{grid-template-columns:1fr}.rr-guide-grid{grid-template-columns:1fr}.rr-learn-next{padding:24px}.rr-learn-intro{padding-top:34px}}

/* Phase 4A-3: pillar guide */
.rr-guide-main{max-width:1180px;margin:0 auto;padding:28px 22px 72px}.rr-breadcrumbs{display:flex;gap:9px;align-items:center;flex-wrap:wrap;font-size:14px;color:#6b7280;margin:4px 0 24px}.rr-breadcrumbs a{color:#4b5563;text-decoration:none}.rr-breadcrumbs a:hover{color:var(--rr-red)}.rr-guide-hero{max-width:900px;padding:26px 0 32px}.rr-guide-hero h1{font-size:clamp(40px,6vw,68px);line-height:1.02;letter-spacing:-.045em;margin:0 0 18px}.rr-guide-hero>p{font-size:20px;line-height:1.65;color:#4b5563;max-width:850px;margin:0}.rr-guide-meta{margin-top:18px;color:#6b7280;font-size:14px;font-weight:700}.rr-quick-answer{background:#111;color:#fff;border-radius:20px;padding:30px 32px;margin:8px 0 36px}.rr-quick-answer h2{font-size:27px;margin:4px 0 12px}.rr-quick-answer p{font-size:17px;line-height:1.7;color:#f3f4f6;margin:0}.rr-guide-layout{display:grid;grid-template-columns:250px minmax(0,760px);gap:54px;align-items:start}.rr-guide-toc{position:sticky;top:20px;border:1px solid var(--rr-border);border-radius:16px;padding:20px;background:#fafafa}.rr-guide-toc strong{display:block;margin-bottom:12px}.rr-guide-toc ol{margin:0;padding-left:20px;display:grid;gap:9px}.rr-guide-toc a{font-size:13px;line-height:1.4;color:#4b5563;text-decoration:none}.rr-guide-toc a:hover{color:var(--rr-red)}.rr-guide-content{min-width:0}.rr-guide-learn,.rr-guide-section,.rr-source-note{margin-bottom:42px}.rr-guide-content h2{font-size:29px;line-height:1.2;margin:0 0 15px}.rr-guide-content p{font-size:17px;line-height:1.78;color:#374151;margin:0 0 16px}.rr-guide-learn{border-left:4px solid var(--rr-red);padding:4px 0 4px 22px}.rr-guide-learn ul,.rr-checklist{padding-left:22px;margin:0;display:grid;gap:10px;color:#374151;line-height:1.55}.rr-guide-section{scroll-margin-top:20px}.rr-guide-video-cta{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;background:var(--rr-light);border:1px solid var(--rr-border);border-radius:20px;padding:28px;margin:8px 0 42px}.rr-guide-video-cta h2{margin:2px 0 8px}.rr-guide-video-cta p{margin:0}.rr-mistakes li::marker{color:var(--rr-red)}.rr-faq-list{display:grid;gap:10px}.rr-faq-list details{border:1px solid var(--rr-border);border-radius:14px;padding:0 18px;background:#fff}.rr-faq-list summary{cursor:pointer;font-weight:800;padding:17px 0}.rr-faq-list p{padding:0 0 17px;margin:0}.rr-related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.rr-related-card{border:1px solid var(--rr-border);border-radius:14px;padding:18px;background:#fafafa;display:grid;gap:9px}.rr-related-card a{color:var(--rr-red);font-weight:800;text-decoration:none}.rr-related-card span{color:#8b93a0;font-size:13px;font-weight:700}.rr-source-note{border-top:1px solid var(--rr-border);padding-top:28px}.rr-source-note h2{font-size:22px}.rr-source-note p,.rr-source-note li{font-size:14px}.rr-source-note ul{padding-left:20px}.rr-source-note a{color:#4b5563}
@media(max-width:900px){.rr-guide-layout{grid-template-columns:1fr;gap:26px}.rr-guide-toc{position:static}.rr-guide-video-cta{grid-template-columns:1fr}.rr-guide-main{padding:22px 16px 52px}.rr-guide-hero>p{font-size:18px}}
@media(max-width:620px){.rr-quick-answer{padding:24px 20px}.rr-related-grid{grid-template-columns:1fr}.rr-guide-content h2{font-size:25px}.rr-guide-hero h1{font-size:42px}}