/* ============================================================================
   DC CAP Enterprise AI — shared design system (dccapinnovation.org)
   SINGLE SOURCE OF TRUTH. Every page links this file. Reference page: week0.html.
   Do NOT re-declare tokens or shared components in a page's inline <style>.
   Page-specific <style> is for genuine one-offs only (a hero width, a diagram).
   ============================================================================ */

/* ===== Tokens ===== */
:root {
    --navy: #101A4C; --purple: #8352FF; --blue: #87B7D5; --gold: #FCB017;
    --tan: #FFF4ED; --white: #FFFFFF;
    --ink: #101A4C; --ink-soft: #333333; --ink-rgb: 16, 26, 76;
    --surface: #FFFFFF; --surface-2: #FFF4ED; --page-bg: #FFFFFF;
    --font-display: 'Noto Serif SemiCondensed', Georgia, serif;
    --font-body: 'Noto Serif', Georgia, serif;
    --font-subhead: 'Noto Serif SemiCondensed', 'Noto Serif', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
}
html[data-theme="dark"] {
    --ink: rgba(255,255,255,0.92); --ink-soft: rgba(255,255,255,0.68);
    --ink-rgb: 214, 222, 245; --surface: #162060; --surface-2: #0F1838;
    --page-bg: #0B1236; --tan: #0F1838;
}

/* ===== Reset & base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
@media (prefers-reduced-motion: no-preference){ html { scroll-behavior: smooth; } }
body {
    font-family: var(--font-body); background: var(--page-bg); color: var(--ink);
    font-size: clamp(1.05rem, 1.55vw, 1.22rem); line-height: 1.78;
    -webkit-font-smoothing: antialiased;
}
html[data-theme="dark"] body { background: var(--page-bg); }
a { color: var(--purple); }

/* Focus: 3px gold ring everywhere; white ring + gold halo on filled / dark buttons. */
:focus-visible{ outline:3px solid var(--gold); outline-offset:3px; border-radius:4px; }
html[data-theme="dark"] :focus-visible{ outline-color:var(--gold); }
.copybtn:focus-visible,.demobtn:focus-visible,.getin-btn:focus-visible,.nextbar a:focus-visible,.cta-primary:focus-visible,.cta-ghost:focus-visible,.route:focus-visible{ outline-color:#fff; box-shadow:0 0 0 5px rgba(252,176,23,0.55); }
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ===== Reveal on scroll (paired with dccap.js) ===== */
html.js .rise{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease;}
html.js .rise.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){html.js .rise{opacity:1!important;transform:none!important;transition:none;}}

/* ===== Global nav ===== */
.gnav{position:sticky;top:0;z-index:1000;background:var(--surface);border-bottom:2px solid var(--navy);box-shadow:0 2px 12px rgba(var(--ink-rgb),0.08);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);}
.gnav-inner{max-width:1240px;margin:0 auto;display:flex;align-items:center;gap:clamp(0.75rem,2vw,2rem);padding:clamp(0.5rem,1.3vw,0.85rem) clamp(1rem,3vw,2rem);flex-wrap:wrap;}
.gnav-logo{flex:0 0 auto;display:flex;align-items:center;}
.gnav-logo img{height:clamp(26px,3.4vw,38px);display:block;}
.gnav ul{list-style:none;display:flex;flex-wrap:wrap;gap:clamp(0.55rem,1.8vw,1.6rem);margin:0;padding:0;justify-content:flex-end;flex:1 1 auto;}
.gnav a{font-family:var(--font-subhead);font-weight:600;font-size:clamp(0.82rem,1.15vw,0.96rem);color:var(--ink-soft);text-decoration:none;padding:0.3rem 0;border-bottom:3px solid transparent;white-space:nowrap;transition:color .2s,border-color .2s;}
.gnav a:hover,.gnav a.active{color:var(--purple);border-bottom-color:var(--purple);}
html[data-theme="dark"] .gnav{background:rgba(11,18,54,0.92);border-bottom-color:rgba(255,255,255,0.14);}
html[data-theme="dark"] .gnav-logo img{filter:brightness(0) invert(1);}
@media (max-width:760px){.gnav ul{flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;gap:1rem;-webkit-overflow-scrolling:touch;}}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#101A4C 0%,#0d0f2d 100%);color:#fff;padding:clamp(3.5rem,9vw,7rem) clamp(1.5rem,5vw,3rem);}
.hero-inner{max-width:1000px;margin:0 auto;}
.eyebrow{font-family:var(--font-mono);font-size:clamp(0.7rem,1.1vw,0.8rem);letter-spacing:0.16em;text-transform:uppercase;color:var(--gold);margin-bottom:1.4rem;}
.hero h1{font-family:var(--font-display);font-weight:900;font-size:clamp(2.6rem,7vw,4.6rem);line-height:1.02;letter-spacing:-0.015em;color:#fff;margin-bottom:1.6rem;max-width:900px;}
.hero h1 .soft{color:rgba(255,255,255,0.5);}
.hero-lead{font-size:clamp(1.12rem,1.7vw,1.45rem);line-height:1.65;color:rgba(255,255,255,0.9);max-width:760px;margin-bottom:2.2rem;}
.hero-meta{display:flex;flex-wrap:wrap;gap:0.6rem;margin-top:2.2rem;}
.chip{font-family:var(--font-mono);font-size:clamp(0.68rem,1vw,0.76rem);letter-spacing:0.04em;padding:0.45rem 0.9rem;border-radius:999px;border:1px solid rgba(255,255,255,0.22);color:rgba(255,255,255,0.9);background:rgba(255,255,255,0.05);}
.chip.gold{border-color:var(--gold);color:var(--gold);}
.cta-row{display:flex;gap:0.85rem;flex-wrap:wrap;align-items:center;}
.cta-primary{background:var(--gold);color:#101A4C;font-family:var(--font-subhead);font-weight:700;padding:0.95rem 1.8rem;border-radius:10px;text-decoration:none;font-size:clamp(1rem,1.5vw,1.15rem);min-height:48px;display:inline-flex;align-items:center;justify-content:center;}
.cta-ghost{background:rgba(255,255,255,0.1);color:#fff;font-family:var(--font-subhead);font-weight:600;padding:0.95rem 1.7rem;border-radius:10px;text-decoration:none;font-size:clamp(0.95rem,1.4vw,1.1rem);border:1px solid rgba(255,255,255,0.22);min-height:48px;display:inline-flex;align-items:center;justify-content:center;}
.hero-chip{display:inline-block;margin-top:1.8rem;font-family:var(--font-mono);font-size:clamp(0.7rem,1vw,0.78rem);letter-spacing:0.05em;color:rgba(255,255,255,0.82);}
.hero-chip b{color:var(--gold);}

/* ===== Section systems ===== */
/* Landing bands (Home-style pages) */
.wrap{max-width:1040px;margin:0 auto;padding:0 clamp(1.5rem,5vw,3rem);}
section.band{padding:clamp(3rem,7vh,5.5rem) 0;}

/* Guided rail layout (week0-style pages): sticky on-page rail + reading column */
.shell{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:248px minmax(0,1fr);gap:clamp(1.5rem,4vw,4rem);padding:0 clamp(1.5rem,5vw,3rem);}
.rail{position:sticky;top:84px;align-self:start;height:max-content;padding:2.5rem 0;}
.rail ol{list-style:none;}
.rail li{margin:0;}
.rail a{display:flex;align-items:center;gap:0.7rem;padding:0.55rem 0;color:var(--ink-soft);text-decoration:none;font-family:var(--font-subhead);font-size:0.98rem;font-weight:500;opacity:0.72;transition:opacity .2s,color .2s;border-left:2px solid transparent;padding-left:0.9rem;margin-left:-0.9rem;}
.rail a .rn{font-family:var(--font-mono);font-size:0.72rem;width:1.6rem;height:1.6rem;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid rgba(var(--ink-rgb),0.25);flex-shrink:0;transition:all .2s;}
.rail a:hover{opacity:1;color:var(--ink);}
.rail a.active{opacity:1;color:var(--ink);border-left-color:var(--gold);font-weight:700;}
.rail a.active .rn{background:var(--gold);color:var(--navy);border-color:var(--gold);}
.rail .opt{font-size:0.78rem;opacity:0.6;font-style:italic;}
.shell main{padding:2.5rem 0 1rem;min-width:0;}
.shell main p{margin-bottom:1.2rem;max-width:680px;}
.shell main p strong{font-weight:700;}
section.blk{padding:clamp(2.5rem,6vh,4.5rem) 0;border-top:1px solid rgba(var(--ink-rgb),0.1);scroll-margin-top:90px;}
section.blk:first-of-type{border-top:none;}

/* ===== Typography atoms ===== */
.kicker{font-family:var(--font-mono);font-size:0.74rem;letter-spacing:0.13em;text-transform:uppercase;color:#5b34cc;margin-bottom:0.8rem;}
html[data-theme="dark"] .kicker{color:#b89cff;}
h2.bh{font-family:var(--font-display);font-weight:700;font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.1;letter-spacing:-0.01em;margin-bottom:1.3rem;color:var(--ink);}
.lede{font-size:clamp(1.05rem,1.55vw,1.25rem);line-height:1.7;color:var(--ink-soft);max-width:680px;margin-bottom:1.5rem;}

/* ===== Callouts ===== */
.permit{background:rgba(252,176,23,0.09);border:1px solid rgba(252,176,23,0.3);border-left:5px solid var(--gold);border-radius:0 14px 14px 0;padding:clamp(1.2rem,2.5vw,1.7rem);margin:1.8rem 0;font-size:clamp(1.05rem,1.5vw,1.2rem);line-height:1.7;color:var(--ink);}
.getin{display:flex;gap:1.1rem;align-items:flex-start;background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-left:5px solid var(--gold);border-radius:0 14px 14px 0;padding:clamp(1.2rem,2.5vw,1.7rem);margin:1.6rem 0;}
.getin-n{flex-shrink:0;width:2.4rem;height:2.4rem;border-radius:50%;background:var(--gold);color:var(--navy);font-family:var(--font-display);font-weight:700;font-size:1.3rem;display:flex;align-items:center;justify-content:center;}
.getin-body h3{font-family:var(--font-subhead);font-weight:700;font-size:1.2rem;margin-bottom:0.4rem;color:var(--ink);}
.getin-body p{font-size:1rem;margin-bottom:0.9rem;}
.getin-btn{display:inline-block;background:var(--navy);color:#fff;text-decoration:none;font-family:var(--font-subhead);font-weight:700;padding:0.65rem 1.3rem;border-radius:10px;font-size:1rem;}
html[data-theme="dark"] .getin-btn{background:var(--purple);}

/* ===== Cards & grids ===== */
.card{background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-radius:16px;padding:clamp(1.3rem,3vw,2rem);margin:1.8rem 0;box-shadow:0 1px 3px rgba(var(--ink-rgb),0.05);}
.card-tag{display:inline-flex;align-items:center;gap:0.45rem;font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.07em;text-transform:uppercase;font-weight:700;color:var(--purple);background:rgba(131,82,255,0.1);padding:0.3rem 0.7rem;border-radius:6px;margin-bottom:1.1rem;}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;}
.stat{background:var(--surface-2);border-radius:12px;padding:1.3rem 1.4rem;}
.stat b{display:block;font-family:var(--font-display);font-weight:700;font-size:clamp(1.6rem,3vw,2.1rem);color:var(--ink);line-height:1;}
.stat span{font-size:0.95rem;color:var(--ink-soft);display:block;margin-top:0.4rem;}
.routes{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;}
.route{display:block;background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-radius:14px;padding:1.4rem 1.5rem;text-decoration:none;color:inherit;transition:border-color .2s,transform .1s;}
.route:hover{border-color:var(--purple);transform:translateY(-2px);}
.route h4{font-family:var(--font-subhead);font-weight:700;font-size:1.15rem;color:var(--ink);margin-bottom:0.35rem;}
.route p{font-size:0.95rem;color:var(--ink-soft);margin:0 0 0.6rem;line-height:1.55;}
.route .go{font-family:var(--font-subhead);font-weight:700;color:var(--purple);font-size:0.95rem;}

/* ===== "Start here" block + the-rest list (landing) ===== */
.startblock{background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-left:5px solid var(--gold);border-radius:0 16px 16px 0;padding:clamp(1.5rem,3.5vw,2.4rem);display:flex;gap:1.5rem;align-items:center;flex-wrap:wrap;}
.startblock .sb-body{flex:1;min-width:240px;}
.startblock .sb-tag{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.08em;text-transform:uppercase;font-weight:700;color:#6e4700;margin-bottom:0.5rem;}
html[data-theme="dark"] .startblock .sb-tag{color:var(--gold);}
.startblock h3{font-family:var(--font-display);font-weight:700;font-size:clamp(1.4rem,2.6vw,1.9rem);color:var(--ink);margin-bottom:0.5rem;}
.startblock p{font-size:clamp(0.98rem,1.4vw,1.08rem);color:var(--ink-soft);margin:0;}
.rest{margin-top:1.6rem;}
.rest-item{display:flex;gap:1rem;align-items:flex-start;padding:1rem 0;border-top:1px solid rgba(var(--ink-rgb),0.1);}
.rest-item .ri-mark{flex-shrink:0;font-family:var(--font-mono);font-size:0.72rem;font-weight:700;color:var(--ink-soft);border:1px solid rgba(var(--ink-rgb),0.25);border-radius:999px;padding:0.25rem 0.6rem;white-space:nowrap;margin-top:0.15rem;}
.rest-item .ri-mark.req{color:#6e4700;border-color:var(--gold);background:rgba(252,176,23,0.12);}
html[data-theme="dark"] .rest-item .ri-mark.req{color:var(--gold);}
.rest-item h4{font-family:var(--font-subhead);font-weight:700;font-size:1.08rem;color:var(--ink);margin-bottom:0.2rem;}
.rest-item p{font-size:0.96rem;color:var(--ink-soft);margin:0;}
.rest-item a{font-family:var(--font-subhead);font-weight:600;font-size:0.92rem;white-space:nowrap;}

/* ===== Spot-the-gap reveal ===== */
.gap{background:rgba(252,176,23,0.1);border:1px solid rgba(252,176,23,0.32);border-left:5px solid var(--gold);border-radius:0 12px 12px 0;padding:0.9rem 1.1rem;margin:1.2rem 0 0;}
.gap-tag{display:inline-block;font-family:var(--font-mono);font-size:0.62rem;letter-spacing:0.08em;text-transform:uppercase;font-weight:700;color:#6e4700;background:rgba(252,176,23,0.26);padding:0.22rem 0.55rem;border-radius:5px;margin-bottom:0.55rem;}
html[data-theme="dark"] .gap-tag{color:var(--gold);}
.gap p{margin:0;font-size:0.96rem;line-height:1.6;color:var(--ink);}
.gap-reveal{margin-top:0.6rem;}
.gap-reveal summary{cursor:pointer;font-family:var(--font-subhead);font-weight:700;color:#6e4700;font-size:0.92rem;list-style:none;}
.gap-reveal summary::-webkit-details-marker{display:none;}
html[data-theme="dark"] .gap-reveal summary{color:var(--gold);}
.gap-reveal p{margin-top:0.5rem;}

/* ===== Interactive: try-it card (chat + copy prompt + your-turn) ===== */
.chat{display:flex;flex-direction:column;gap:0.7rem;margin:0.4rem 0 1.3rem;}
.bubble{max-width:84%;padding:0.85rem 1.1rem;border-radius:16px;font-size:0.98rem;line-height:1.6;}
.bubble.you{align-self:flex-end;background:var(--navy);color:#fff;border-bottom-right-radius:5px;}
html[data-theme="dark"] .bubble.you{background:#2c3a86;}
.bubble.ai{align-self:flex-start;background:var(--surface-2);color:var(--ink);border:1px solid rgba(var(--ink-rgb),0.1);border-bottom-left-radius:5px;}
.bubble .who{font-family:var(--font-mono);font-size:0.62rem;letter-spacing:0.08em;text-transform:uppercase;opacity:0.6;display:block;margin-bottom:0.3rem;}
.promptbox{display:flex;align-items:center;gap:0.6rem;background:rgba(var(--ink-rgb),0.04);border:1px dashed rgba(var(--ink-rgb),0.22);border-radius:10px;padding:0.7rem 0.9rem;font-family:var(--font-mono);font-size:0.86rem;line-height:1.5;}
.promptbox code{flex:1;color:var(--ink);background:none;}
.copybtn{flex-shrink:0;background:var(--purple);color:#fff;border:none;border-radius:7px;padding:0.45rem 0.8rem;font-family:var(--font-subhead);font-weight:600;font-size:0.82rem;cursor:pointer;white-space:nowrap;transition:background .2s,transform .1s;min-height:38px;}
.copybtn:hover{background:#6a3ee0;}
.copybtn:active{transform:scale(0.96);}
.yourturn{margin-top:1.2rem;padding-top:1.1rem;border-top:1px solid rgba(var(--ink-rgb),0.1);font-size:0.98rem;color:var(--ink-soft);}
.yourturn strong{color:var(--ink);}
.yourturn ol{margin:0.7rem 0 0.9rem 1.3rem;}
.yourturn li{margin-bottom:0.4rem;}
.yourturn code{font-family:var(--font-mono);font-size:0.85em;background:rgba(var(--ink-rgb),0.07);padding:0.08rem 0.35rem;border-radius:5px;color:var(--ink);}

/* ===== Interactive: predict-the-next-word demo ===== */
.demo{background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-radius:16px;padding:clamp(1.3rem,3vw,2rem);margin:1.8rem 0;}
.demo .stem{font-family:var(--font-display);font-size:clamp(1.2rem,2.2vw,1.6rem);line-height:1.5;margin-bottom:1.2rem;}
.demo .blank{color:var(--purple);border-bottom:3px dotted var(--purple);padding:0 0.5rem;}
.demo .preds{display:flex;flex-direction:column;gap:0.6rem;margin-top:1.2rem;}
.pred{display:grid;grid-template-columns:max-content 1fr max-content;align-items:center;gap:0.8rem;opacity:0;transform:translateX(-8px);transition:opacity .4s,transform .4s;}
.pred.show{opacity:1;transform:none;}
.pred .word{font-family:var(--font-mono);font-size:0.92rem;font-weight:500;}
.pred .bar{height:9px;border-radius:999px;background:rgba(131,82,255,0.18);overflow:hidden;}
.pred .bar i{display:block;height:100%;background:var(--purple);width:0;transition:width .9s ease;border-radius:999px;}
.pred .pct{font-family:var(--font-mono);font-size:0.78rem;color:var(--ink-soft);}
.demobtn{background:var(--navy);color:#fff;border:none;border-radius:9px;padding:0.7rem 1.3rem;font-family:var(--font-subhead);font-weight:600;font-size:0.95rem;cursor:pointer;min-height:44px;transition:transform .1s;}
html[data-theme="dark"] .demobtn{background:var(--purple);}
.demobtn:active{transform:scale(0.97);}
.demo .caption{margin-top:1.2rem;font-size:0.96rem;color:var(--ink-soft);font-style:italic;}

/* ===== Teach block (what is an LLM) ===== */
.teach{margin:1.6rem 0;}
.teach .word3{display:flex;flex-wrap:wrap;gap:0.7rem;margin-bottom:1.6rem;}
.teach .w{flex:1;min-width:150px;background:var(--surface-2);border-radius:12px;padding:1rem 1.2rem;border:1px solid rgba(var(--ink-rgb),0.08);}
.teach .w b{font-family:var(--font-display);font-size:1.3rem;color:var(--ink);display:block;margin-bottom:0.3rem;}
.teach .w span{font-size:0.92rem;color:var(--ink-soft);line-height:1.5;}
.teach ul.because{list-style:none;margin:1.2rem 0;}
.teach ul.because li{position:relative;padding:0.55rem 0 0.55rem 1.7rem;font-size:1.02rem;line-height:1.6;border-bottom:1px solid rgba(var(--ink-rgb),0.07);}
.teach ul.because li:before{content:"";position:absolute;left:0;top:1.1rem;width:9px;height:9px;border-radius:50%;background:var(--gold);}

/* ===== Interactive: interface walkthrough ===== */
.rooms{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0.8rem;margin:1.6rem 0;}
.room{text-align:left;background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-radius:13px;padding:1rem 1.1rem;cursor:pointer;transition:border-color .2s,transform .1s;font-family:inherit;color:inherit;}
.room:hover{border-color:var(--purple);}
.room:active{transform:scale(0.99);}
.room-top{display:flex;align-items:center;justify-content:space-between;gap:0.6rem;}
.room h4{font-family:var(--font-subhead);font-weight:700;font-size:1.05rem;color:var(--ink);}
.badge{font-family:var(--font-mono);font-size:0.6rem;letter-spacing:0.06em;text-transform:uppercase;font-weight:700;padding:0.22rem 0.5rem;border-radius:5px;white-space:nowrap;}
.badge.now{background:rgba(252,176,23,0.22);color:#6e4700;}
html[data-theme="dark"] .badge.now{color:var(--gold);}
.badge.later{background:rgba(var(--ink-rgb),0.08);color:var(--ink-soft);}
.room .desc{font-size:0.92rem;line-height:1.55;color:var(--ink-soft);margin-top:0;max-height:0;overflow:hidden;transition:max-height .3s ease,margin-top .3s ease;}
.room.open .desc{max-height:360px;margin-top:0.7rem;}
.room .more{font-family:var(--font-mono);font-size:0.68rem;color:var(--purple);margin-top:0.5rem;}
.room-rt{display:flex;align-items:center;gap:0.55rem;flex-shrink:0;}
.room-x{font-family:var(--font-mono);font-size:1.3rem;line-height:1;color:var(--ink-soft);transition:transform .25s;}
.room.open .room-x{transform:rotate(45deg);}

/* ===== Private self-check (localStorage, per page) ===== */
.selfcheck{background:var(--surface-2);border-radius:16px;padding:clamp(1.3rem,3vw,1.8rem);margin:1.8rem 0;}
.selfcheck .ck{display:flex;align-items:flex-start;gap:0.8rem;padding:0.6rem 0;cursor:pointer;}
.selfcheck input{width:1.4rem;height:1.4rem;accent-color:var(--gold);margin-top:0.15rem;flex-shrink:0;cursor:pointer;}
.selfcheck label{font-size:1.02rem;line-height:1.5;cursor:pointer;}
.selfcheck .priv{font-size:0.86rem;color:var(--ink-soft);font-style:italic;margin-top:0.9rem;padding-top:0.9rem;border-top:1px solid rgba(var(--ink-rgb),0.1);}

/* ===== Optional "under the hood" door ===== */
details.deeper{background:var(--surface);border:1px solid rgba(var(--ink-rgb),0.13);border-radius:14px;margin:1.4rem 0;}
details.deeper summary{cursor:pointer;list-style:none;padding:1.1rem 1.3rem;font-family:var(--font-subhead);font-weight:600;font-size:1.08rem;color:var(--ink);display:flex;align-items:center;gap:0.6rem;}
details.deeper summary::-webkit-details-marker{display:none;}
details.deeper summary::after{content:"+";margin-left:auto;font-family:var(--font-mono);color:var(--ink-soft);font-size:1.3rem;}
details.deeper[open] summary::after{content:"\2212";}
details.deeper .dbody{padding:0 1.3rem 1.3rem;}
details.deeper .dbody p{font-size:0.98rem;}
.skiptag{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.05em;text-transform:uppercase;color:var(--ink-soft);}

/* ===== Next-step bar ===== */
.nextbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;background:var(--navy);color:#fff;border-radius:16px;padding:clamp(1.3rem,3vw,1.8rem) clamp(1.4rem,3.5vw,2.2rem);margin:2rem 0 1rem;}
.nextbar .nl{font-family:var(--font-subhead);}
.nextbar .nl small{display:block;font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--gold);margin-bottom:0.3rem;}
.nextbar .nl b{font-size:1.25rem;font-weight:700;}
.nextbar a{background:var(--gold);color:var(--navy);text-decoration:none;font-family:var(--font-subhead);font-weight:700;padding:0.7rem 1.4rem;border-radius:10px;white-space:nowrap;font-size:1rem;}

/* ===== Footer ===== */
.site-footer{background:var(--navy);color:#fff;padding:clamp(2rem,4vw,3rem) clamp(1.5rem,5vw,3rem);text-align:center;margin-top:clamp(2rem,5vw,3rem);font-family:var(--font-body);}
.site-footer .sf-logo img{height:clamp(34px,5vw,46px);margin-bottom:0.85rem;}
html[data-theme="dark"] .site-footer .sf-logo img{filter:brightness(0) invert(1);}
.site-footer .sf-title{font-family:var(--font-subhead);font-weight:700;margin:0 0 0.35rem;color:#fff;}
.site-footer .sf-tag{font-size:0.9rem;opacity:0.86;max-width:620px;margin:0 auto 1.1rem;line-height:1.6;}
.site-footer .sf-links{font-size:0.85rem;line-height:2;}
.site-footer .sf-links a{color:var(--gold);text-decoration:none;}

/* ===== Responsive: collapse the rail to a horizontal scroller ===== */
@media (max-width:900px){
    .shell{grid-template-columns:1fr;gap:0;}
    .rail{position:sticky;top:56px;z-index:900;padding:0.6rem 0;margin:0 calc(-1 * clamp(1.5rem,5vw,3rem));background:var(--page-bg);border-bottom:1px solid rgba(var(--ink-rgb),0.12);}
    .rail ol{display:flex;gap:0.3rem;overflow-x:auto;padding:0.3rem clamp(1.5rem,5vw,3rem);-webkit-overflow-scrolling:touch;}
    .rail a{border-left:none;border-bottom:2px solid transparent;padding:0.4rem 0.2rem;margin:0;white-space:nowrap;font-size:0.88rem;}
    .rail a.active{border-left:none;border-bottom-color:var(--gold);}
    .rail a .rn{width:1.3rem;height:1.3rem;}
    .rail .lbl-full{display:none;}
    .shell main{padding-top:1.5rem;}
}