/* "How to read" guide page. Tokens and shared components come from style.css / atlas.css. */
.guide-hero{padding:56px 0 70px;border-bottom:1px solid var(--rule)}
.guide-hero .eyebrow{color:var(--soft)}
.guide-hero-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:64px;align-items:end;margin-top:34px}
.guide-hero h1{font-size:clamp(38px,4.4vw,62px);font-weight:650;letter-spacing:-.07em;line-height:1.22}
.guide-hero h1 em{font-style:normal;color:var(--blue)}
.guide-deck{font-size:15px;line-height:1.95;color:#3a4553;margin-top:24px;max-width:640px}
.guide-deck b{color:var(--navy)}
.guide-toc{list-style:none;margin:0;padding:0;border-top:3px solid var(--navy);background:var(--panel)}
.guide-toc a{display:flex;gap:14px;align-items:baseline;padding:13px 18px;border-bottom:1px solid var(--rule);font-size:14px}
.guide-toc a span{font:10px var(--mono);color:var(--blue)}
.guide-toc a:hover{background:#e8eef6;color:var(--navy)}
.guide-sec{padding:84px 0}
.guide-band{background:var(--panel);border-block:1px solid var(--rule)}
.guide-sec>.eyebrow,.guide-sec .section-shell>.eyebrow{color:var(--blue);margin-bottom:18px}
.guide-sec h2{margin-bottom:14px}
.guide-lead{font-size:14.5px;line-height:1.9;color:#3a4553;max-width:760px;margin-bottom:34px}
.parts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.part-card{display:flex;flex-direction:column;gap:10px;border:1px solid var(--rule);border-top:3px solid var(--navy);background:#fff;padding:22px 22px 18px;transition:border-color .2s,transform .2s}
.part-card:hover{border-color:var(--blue);transform:translateY(-3px)}
.part-no{font:11px var(--mono);color:var(--blue)}
.part-card h3{font-size:20px;font-weight:600;letter-spacing:-.04em}
.part-card p{font-size:13px;line-height:1.85;color:#2f3a48}
.part-card .part-when{font-size:12px;color:var(--soft);padding-top:10px;border-top:1px dashed var(--rule);margin-top:auto}
.part-when b{display:block;font:9px var(--mono);letter-spacing:.08em;color:var(--blue);margin-bottom:4px}
.part-go{font-size:12px;color:var(--blue);font-weight:600}
.color-key{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;font-size:12px;margin-top:22px;padding:14px 18px;border:1px solid var(--rule)}
.color-key-note{color:var(--soft);margin-left:auto}
.anatomy{list-style:none;margin:0;padding:0;position:relative}
.anatomy::before{content:'';position:absolute;left:61px;top:10px;bottom:10px;width:2px;background:#c9d1dc}
.anatomy li{display:grid;grid-template-columns:124px 1fr;gap:22px;align-items:start;padding:14px 0;position:relative}
.an-tag{position:relative;z-index:1;justify-self:center;font:10.5px var(--mono);letter-spacing:.04em;color:#fff;background:var(--navy);padding:6px 10px;white-space:nowrap}
.an-head .an-tag{background:var(--blue)}
.an-extra .an-tag{background:#d08a2e}
.anatomy li>div{background:#fff;border:1px solid var(--rule);padding:14px 18px}
.anatomy h3{font-size:15.5px;font-weight:600;letter-spacing:-.03em;margin-bottom:6px}
.anatomy p{font-size:13px;line-height:1.85;color:#2f3a48}
.passes{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--rule)}
.passes>div{padding:22px 24px;display:flex;flex-direction:column;gap:10px}
.passes>div+div{border-left:1px solid var(--rule)}
.passes span{font:10px var(--mono);letter-spacing:.08em;color:var(--blue)}
.passes h3{font-size:19px;font-weight:600;letter-spacing:-.04em}
.passes p{font-size:13px;line-height:1.85;color:#2f3a48}
.passes .pass-goal{margin-top:auto;padding-top:10px;border-top:1px dashed var(--rule);color:var(--navy);font-weight:500}
.elements{display:grid;gap:14px}
.el{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:26px;align-items:center;background:#fff;border:1px solid var(--rule);padding:18px 22px}
.el-sample{min-width:0}
.el-sample .eq,.el-sample .limit,.el-sample .plain{margin:0}
.el h3{font-size:15px;font-weight:600;margin-bottom:6px}
.el p{font-size:13px;line-height:1.85;color:#2f3a48}
.guide-stats{margin:0 0 6px;grid-template-columns:repeat(2,1fr)}
.guide-dots{width:100%;max-width:360px;height:auto;display:block}
.g-small{font:10px var(--mono);fill:#3a4553}
.guide-chips{margin-top:0}
.guide-chips a{cursor:default}
.guide-mapnode{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px}
.guide-mapnode>span:not(.gm-arrow){border:1px solid var(--rule);padding:6px 10px;background:#fff}
.gm-paper{display:inline-flex;align-items:center;gap:6px}
.gm-paper i{width:7px;height:7px;border-radius:50%;background:var(--blue);display:inline-block}
.gm-concept{background:var(--navy)!important;color:#fff;border-color:var(--navy)!important;font-weight:600}
.gm-arrow{color:var(--blue)}
.notation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:0;border-top:1px solid var(--rule);border-left:1px solid var(--rule)}
.nt{display:grid;grid-template-columns:150px 1fr;gap:14px;align-items:center;padding:14px 16px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.nt-sym{font-size:15px;color:var(--navy);overflow-x:auto}
.nt b{display:block;font-size:13px;font-weight:600;margin-bottom:3px}
.nt-note{display:block;font-size:12px;color:var(--soft);line-height:1.7}
.routes{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.route{background:#fff;border:1px solid var(--rule);border-top:3px solid var(--navy);padding:20px 22px;display:flex;flex-direction:column;gap:10px}
.route header{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.route h3{font-size:17px;font-weight:600;letter-spacing:-.03em}
.route header span{font:10px var(--mono);color:var(--soft);white-space:nowrap}
.route>p{font-size:13px;color:#2f3a48;line-height:1.8}
.route ol{list-style:none;margin:4px 0 0;padding:0;counter-reset:r;display:flex;flex-wrap:wrap;gap:8px}
.route li{counter-increment:r}
.route li a{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--rule);padding:7px 10px;font-size:12.5px;position:relative}
.route li a::before{content:counter(r);font:10px var(--mono);color:var(--blue)}
.route li a:hover{border-color:var(--blue);background:#e8eef6}
.route li i{width:6px;height:6px;border-radius:50%;display:inline-block}
.r-year{font:10px var(--mono);color:var(--soft)}
.r-name{font-weight:500}
.route li small{font-size:10.5px;color:#d08a2e;margin-left:4px}
.route-start{margin-top:auto;padding-top:10px;font-size:12.5px;font-weight:600;color:var(--blue)}
.caveats{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.caveats li{padding:14px 0;border-bottom:1px solid var(--rule);font-size:13.5px;line-height:1.85;color:#2f3a48}
.caveats b{color:var(--navy)}
.caveats code{font:12px var(--mono);background:var(--panel);padding:1px 5px}
.guide-start{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;margin-top:44px;padding:30px 32px;background:var(--navy);color:#f2f5f9}
.guide-start .eyebrow{color:#8fb3dc}
.guide-start h3{font-size:26px;font-weight:600;letter-spacing:-.05em;margin:8px 0}
.guide-start p{font-size:13.5px;line-height:1.8;color:#c9d6e6}
.guide-start-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.guide-start .primary-link{margin-top:0;background:#fff;color:var(--navy)}
.guide-start .primary-link:hover{background:#e8eef6}
.guide-start .secondary-link{margin-top:0;color:#c9d6e6}
@media(max-width:1000px){.guide-hero-grid{grid-template-columns:1fr;gap:32px}.parts-grid{grid-template-columns:1fr}.passes{grid-template-columns:1fr}.passes>div+div{border-left:0;border-top:1px solid var(--rule)}.el{grid-template-columns:1fr;gap:14px}.routes{grid-template-columns:1fr}}
@media(max-width:800px){.guide-sec{padding:60px 0}.anatomy::before{left:14px}.anatomy li{grid-template-columns:1fr;gap:8px;padding-left:34px}.an-tag{justify-self:start}.color-key-note{margin-left:0}.guide-start{grid-template-columns:1fr;padding:24px}.nt{grid-template-columns:110px 1fr}}
.guide-page .hero-cta{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.guide-page .hero-cta .primary-link{margin-top:30px}
.guide-page .secondary-link{font-size:13px;margin-top:30px;color:var(--soft)}
.guide-page .secondary-link:hover{color:var(--blue)}
.guide-start .secondary-link{margin-top:0;font-size:13px;color:#c9d6e6}
.nt-sym{font-size:20px}
.nt-sym .katex{color:var(--navy)}
.el .el-sample .data-source{font:10px/1.7 var(--mono);color:#7a8492;margin-top:10px}