:root{
  --bg:#070b14;
  --bg-2:#0b1020;
  --panel:#101725;
  --panel-2:#151d2d;
  --panel-3:#1b2538;
  --text:#f4f7fb;
  --muted:#9ba8bb;
  --subtle:#68758a;
  --line:rgba(255,255,255,.08);
  --accent:#ffb15c;
  --accent-2:#8aa7ff;
  --good:#64d5a0;
  --danger:#ff7c82;
  --shadow:0 22px 70px rgba(0,0,0,.35);
  --sidebar:292px;
  --radius:20px;
}
html[data-theme="light"]{
  --bg:#f4f6f9; --bg-2:#eef1f5; --panel:#ffffff; --panel-2:#f7f8fb; --panel-3:#edf1f7;
  --text:#182033; --muted:#667288; --subtle:#8c96a7; --line:rgba(29,45,70,.10);
  --shadow:0 18px 55px rgba(37,52,75,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.55}
button,input,select{font:inherit}
button,a{ -webkit-tap-highlight-color:transparent}
a{color:inherit}
code{font-family:"SFMono-Regular",Consolas,monospace;background:var(--panel-3);border:1px solid var(--line);padding:.15em .4em;border-radius:6px;color:var(--accent)}
.app-shell{min-height:100vh}
.sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar);padding:24px 18px 18px;background:color-mix(in srgb,var(--panel) 92%,transparent);border-right:1px solid var(--line);backdrop-filter:blur(18px);z-index:50;display:flex;flex-direction:column}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;padding:3px 7px 20px}
.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(145deg,var(--accent),#ff7d65);color:#241406;font-weight:900;box-shadow:0 8px 24px rgba(255,157,82,.25)}
.brand strong{display:block;font-size:17px;letter-spacing:.2px}.brand span{font-size:12px;color:var(--muted)}
.search-trigger{border:1px solid var(--line);background:var(--panel-2);color:var(--muted);height:44px;border-radius:12px;padding:0 11px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;text-align:left;gap:8px;cursor:pointer;margin-bottom:16px}
.search-trigger:hover{border-color:rgba(255,177,92,.35);color:var(--text)}
kbd{font-size:10px;color:var(--subtle);background:var(--panel-3);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:2px 5px}
.nav-list{overflow:auto;padding-right:4px;scrollbar-width:thin;flex:1}
.nav-section-label{font-size:10px;text-transform:uppercase;letter-spacing:1.3px;color:var(--subtle);padding:13px 10px 7px;font-weight:800}
.nav-item{width:100%;border:0;background:transparent;color:var(--muted);display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:10px;cursor:pointer;text-align:left;margin:1px 0}
.nav-item:hover{background:var(--panel-2);color:var(--text)}.nav-item.active{background:linear-gradient(90deg,rgba(255,177,92,.13),rgba(255,177,92,.03));color:var(--text);box-shadow:inset 2px 0 var(--accent)}
.nav-item .n{font-size:10px;color:var(--subtle);width:21px}.nav-item .e{width:21px;text-align:center}.nav-item .t{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.nav-item .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}.nav-item .lock{font-size:10px;color:var(--subtle)}
.sidebar-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:15px 7px 0;margin-top:10px}.version-chip{font-size:11px;color:var(--muted)}.theme-toggle{border:1px solid var(--line);background:var(--panel-2);color:var(--text);width:34px;height:34px;border-radius:9px;cursor:pointer}
.content{margin-left:var(--sidebar);min-height:100vh}
.page{max-width:1450px;margin:0 auto;padding:32px 42px 30px}
.hero{min-height:660px;border-radius:28px;position:relative;overflow:hidden;display:flex;align-items:flex-end;background:#111827;box-shadow:var(--shadow)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.85) contrast(1.04)}
.hero-vignette{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,9,16,.96) 0%,rgba(5,9,16,.76) 43%,rgba(5,9,16,.2) 72%),linear-gradient(0deg,rgba(5,9,16,.88) 0%,transparent 45%)}
.hero-content{position:relative;z-index:2;max-width:750px;padding:76px 66px 115px}.eyebrow,.section-kicker,.chapter-number{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:1.7px;font-size:11px;font-weight:850;color:var(--accent)}
.eyebrow:before,.section-kicker:before{content:"";width:22px;height:1px;background:currentColor}
.hero h1{font-size:clamp(48px,6.5vw,88px);line-height:.95;letter-spacing:-3.5px;margin:15px 0 24px;max-width:900px}.hero h1 span{color:#cbd7ed}
.hero p{font-size:18px;color:#b8c2d3;max-width:650px}.hero-actions{display:flex;gap:10px;margin-top:30px;flex-wrap:wrap}
.btn{border:0;border-radius:12px;padding:13px 17px;text-decoration:none;font-weight:750;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn-primary{background:var(--accent);color:#221508}.btn-primary:hover{filter:brightness(1.06)}
.btn-glass{background:rgba(255,255,255,.07);color:#fff;border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(8px)}
.hero-stats{position:absolute;z-index:3;right:26px;bottom:26px;display:flex;background:rgba(9,14,24,.68);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.11);border-radius:16px;overflow:hidden}
.hero-stats div{padding:14px 18px;border-right:1px solid rgba(255,255,255,.08)}.hero-stats div:last-child{border:0}.hero-stats b{font-size:20px;display:block}.hero-stats span{font-size:10px;color:#aab5c5;text-transform:uppercase;letter-spacing:.7px}
.section-block{padding:72px 8px 22px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-heading h2{font-size:clamp(31px,4vw,48px);letter-spacing:-1.5px;margin:5px 0}.section-heading>p{max-width:440px;color:var(--muted)}
.goal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.goal-card{min-height:135px;border:1px solid var(--line);border-radius:18px;background:var(--panel);padding:21px;text-align:left;color:var(--text);display:grid;grid-template-columns:auto 1fr auto;align-items:start;gap:15px;text-decoration:none;cursor:pointer;box-shadow:0 5px 20px rgba(0,0,0,.07)}
.goal-card:hover{transform:translateY(-2px);border-color:rgba(255,177,92,.28);transition:.2s}.goal-card.featured{background:linear-gradient(145deg,rgba(255,177,92,.13),var(--panel) 45%)}.goal-icon{font-size:25px}.goal-card b{font-size:16px}.goal-card p{font-size:13px;color:var(--muted);margin:7px 0 0}.arrow{color:var(--accent);font-size:21px}.soon{font-size:9px;color:var(--subtle);text-transform:uppercase;letter-spacing:.7px;border:1px solid var(--line);padding:4px 6px;border-radius:999px}
.split-showcase{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding-bottom:90px}.showcase-copy h2{font-size:45px;line-height:1.06;letter-spacing:-1.5px;margin:10px 0 20px}.showcase-copy>p{color:var(--muted);font-size:17px}
.mini-feature-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:27px}.mini-feature-list div{background:var(--panel);border:1px solid var(--line);padding:14px;border-radius:13px;display:grid;grid-template-columns:auto 1fr;column-gap:9px}.mini-feature-list span{grid-row:span 2}.mini-feature-list b{font-size:13px}.mini-feature-list small{color:var(--muted)}
.showcase-card{padding:26px;background:radial-gradient(circle at 30% 20%,rgba(138,167,255,.18),transparent 42%),var(--panel);border:1px solid var(--line);border-radius:28px}.mock-browser{background:#090e17;border-radius:17px;overflow:hidden;border:1px solid rgba(255,255,255,.07);box-shadow:0 25px 60px rgba(0,0,0,.35)}.mock-bar{height:43px;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:6px;padding:0 13px;color:#738096;font-size:10px}.mock-bar i{width:7px;height:7px;border-radius:50%;background:#6b7280}.mock-bar span{margin-left:auto;margin-right:auto}.mock-content{padding:35px}.mock-label{font-size:11px;color:#ffcc74;text-transform:uppercase;letter-spacing:1.1px}.mock-content h3{font-size:25px;margin:8px 0 12px}.mock-content p{color:#98a6ba}.mock-tags{display:flex;gap:6px;margin-top:18px}.mock-tags span{font-size:10px;padding:5px 8px;border:1px solid rgba(255,255,255,.09);border-radius:999px;color:#9facbd}
.chapter-hero{height:430px;border-radius:25px;overflow:hidden;position:relative;background:#111827}.chapter-hero-image{position:absolute;width:100%;height:100%;object-fit:cover}.chapter-hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,11,20,.96),rgba(7,11,20,.75) 44%,rgba(7,11,20,.18)),linear-gradient(0deg,rgba(7,11,20,.76),transparent 60%)}.chapter-hero-content{position:absolute;z-index:2;left:48px;bottom:43px;max-width:720px}.breadcrumbs{font-size:12px;color:#9aa9bc;display:flex;gap:8px;margin-bottom:25px}.breadcrumbs a{text-decoration:none}.chapter-hero h1{font-size:48px;line-height:1.06;margin:8px 0 10px;letter-spacing:-1.5px}.chapter-hero p{color:#b8c4d5;font-size:17px}.chapter-tags{display:flex;gap:6px;margin-top:18px}.chapter-tags span{font-size:10px;padding:5px 8px;border:1px solid rgba(255,255,255,.13);border-radius:999px;background:rgba(255,255,255,.05);color:#b8c4d5}
.chapter-layout{display:grid;grid-template-columns:minmax(0,850px) 220px;justify-content:center;gap:60px;padding:55px 20px 90px}.article{min-width:0}.chapter-intro-card{display:flex;gap:16px;background:linear-gradient(135deg,rgba(255,177,92,.12),rgba(138,167,255,.07));border:1px solid rgba(255,177,92,.18);border-radius:16px;padding:20px;margin-bottom:55px}.intro-icon{font-size:24px}.chapter-intro-card p{color:var(--muted);margin:4px 0 0}
.article-section{position:relative;padding:18px 0 64px;border-bottom:1px solid var(--line);scroll-margin-top:28px}.article-section+.article-section{padding-top:62px}.section-anchor{position:absolute;left:-54px;top:22px;color:var(--subtle);font-size:11px;font-weight:800}.article-section h2{font-size:38px;line-height:1.1;letter-spacing:-1.2px;margin:7px 0 14px}.lead-text{font-size:17px;color:var(--muted);max-width:750px}.relation-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:23px 0}.relation-row>span{font-size:11px;color:var(--subtle);text-transform:uppercase;letter-spacing:.7px}.relation-row a{font-size:11px;text-decoration:none;background:var(--panel-2);border:1px solid var(--line);padding:4px 8px;border-radius:999px;color:var(--muted)}
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:28px 0}.step-card{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:17px}.step-card>span{display:grid;place-items:center;width:26px;height:26px;background:var(--accent);color:#29190b;border-radius:8px;font-weight:900;font-size:11px;margin-bottom:25px}.step-card b{font-size:14px}.step-card p{font-size:12px;color:var(--muted);margin:6px 0 0}
.rule-list{display:grid;gap:9px}.rule-list>div{display:flex;gap:13px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px}.rule-icon{font-size:19px}.rule-list b{font-size:14px}.rule-list p{font-size:13px;color:var(--muted);margin:4px 0 0}
.example-box,.tip-box{border:1px solid rgba(100,213,160,.20);background:rgba(100,213,160,.07);border-radius:15px;padding:18px;margin-top:22px}.example-head{display:flex;gap:8px;align-items:center;color:var(--good)}.example-box p{color:var(--muted);margin-bottom:0}.example-box strong{color:var(--text)}
.catalog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:27px 0 16px}.filter-pills{display:flex;gap:6px;flex-wrap:wrap}.filter-pill{border:1px solid var(--line);background:var(--panel);color:var(--muted);padding:7px 10px;border-radius:999px;font-size:11px;cursor:pointer}.filter-pill.active{color:#201408;background:var(--accent);border-color:var(--accent);font-weight:800}.catalog-toolbar select{background:var(--panel);border:1px solid var(--line);border-radius:10px;color:var(--text);padding:8px 10px;font-size:11px}
.job-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.job-card{border:1px solid var(--line);background:var(--panel);border-radius:17px;overflow:hidden;transition:.2s}.job-card:hover{transform:translateY(-2px);border-color:rgba(138,167,255,.25)}.job-art{height:165px;position:relative;overflow:hidden}.job-art img{width:100%;height:100%;object-fit:cover}.job-art:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(7,11,20,.92),rgba(7,11,20,.04) 70%)}.job-badges{position:absolute;z-index:2;left:11px;bottom:10px;display:flex;gap:5px}.job-badges span{font-size:9px;color:#eef3fa;background:rgba(8,13,23,.75);backdrop-filter:blur(7px);border:1px solid rgba(255,255,255,.09);padding:4px 6px;border-radius:999px}.job-body{padding:15px}.job-title{display:flex;justify-content:space-between;gap:10px;align-items:start}.job-title h3{font-size:15px;margin:0}.salary{font-size:12px;color:var(--accent);font-weight:850;white-space:nowrap}.job-meta{display:flex;gap:8px;color:var(--muted);font-size:10px;margin:8px 0}.job-body p{font-size:12px;color:var(--muted);margin:9px 0}.requirements{font-size:10px;border-top:1px solid var(--line);padding-top:10px;color:var(--subtle)}.requirements b{color:var(--muted)}
.branch-grid{display:grid;gap:9px;margin-top:25px}.branch-card{display:grid;grid-template-columns:165px 1fr;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 17px}.branch-card b{font-size:13px}.branch-card p{color:var(--muted);font-size:12px;margin:0}.branch-card .branch-title{display:flex;gap:8px;align-items:center}
.troubleshoot{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:25px}.trouble-item{background:var(--panel);border:1px solid var(--line);border-radius:13px;padding:15px;display:flex;gap:10px}.trouble-item span{color:var(--danger)}.trouble-item p{font-size:12px;color:var(--muted);margin:0}.tip-box{display:flex;gap:12px;background:rgba(255,177,92,.07);border-color:rgba(255,177,92,.20)}.tip-box p{color:var(--muted);margin:3px 0 0;font-size:13px}
.on-this-page{position:sticky;top:30px;align-self:start;border-left:1px solid var(--line);padding-left:18px;display:flex;flex-direction:column;gap:9px}.on-this-page>span{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--subtle);margin-bottom:4px}.on-this-page a,.on-this-page button{font-size:11px;color:var(--muted);text-decoration:none;background:none;border:0;text-align:left;padding:0;cursor:pointer}.on-this-page a:hover,.on-this-page button:hover{color:var(--text)}.onpage-divider{height:1px;background:var(--line);margin:5px 0}
.chapter-next{margin-top:60px;border:1px solid var(--line);border-radius:16px;padding:17px 20px;display:flex;justify-content:space-between;align-items:center;background:var(--panel)}.chapter-next small{display:block;color:var(--subtle);font-size:10px;text-transform:uppercase;letter-spacing:.8px}.chapter-next b{font-size:14px}.chapter-next .btn{font-size:11px;color:var(--muted)}
.site-footer{max-width:1320px;margin:0 auto;padding:25px 42px 45px;border-top:1px solid var(--line);color:var(--subtle);display:flex;justify-content:space-between;font-size:11px}.site-footer div{display:flex;gap:8px}.site-footer b{color:var(--muted)}
.mobile-topbar{display:none}.sidebar-backdrop{display:none}
.search-modal{position:fixed;inset:0;background:rgba(0,0,0,.66);backdrop-filter:blur(7px);z-index:100;display:none;padding:10vh 20px}.search-modal.open{display:block}.search-panel{max-width:720px;margin:auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}.search-input-wrap{height:62px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;padding:0 17px;border-bottom:1px solid var(--line)}.search-input-wrap input{background:transparent;border:0;outline:none;color:var(--text);font-size:16px}.search-hint{font-size:10px;color:var(--subtle);padding:10px 17px;border-bottom:1px solid var(--line)}.search-results{max-height:55vh;overflow:auto;padding:8px}.search-result{display:flex;gap:12px;padding:12px;border-radius:11px;text-decoration:none}.search-result:hover{background:var(--panel-2)}.search-result .sr-icon{font-size:19px}.search-result b{font-size:12px;display:block}.search-result p{font-size:10px;color:var(--muted);margin:2px 0 0}.search-empty{padding:30px;text-align:center;color:var(--muted)}
.toast{position:fixed;right:22px;bottom:22px;background:#111927;color:#fff;border:1px solid rgba(255,255,255,.12);padding:12px 15px;border-radius:11px;box-shadow:var(--shadow);font-size:12px;transform:translateY(20px);opacity:0;pointer-events:none;transition:.2s;z-index:120}.toast.show{transform:translateY(0);opacity:1}

@media(max-width:1180px){.goal-grid{grid-template-columns:repeat(2,1fr)}.chapter-layout{grid-template-columns:minmax(0,850px)}.on-this-page{display:none}.section-anchor{display:none}.split-showcase{gap:30px}}
@media(max-width:900px){
  :root{--sidebar:280px}.sidebar{transform:translateX(-100%);transition:.22s}.sidebar.open{transform:translateX(0)}.sidebar-backdrop.open{display:block;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:45}
  .content{margin-left:0;padding-top:58px}.mobile-topbar{display:flex;position:fixed;top:0;left:0;right:0;height:58px;align-items:center;justify-content:space-between;padding:0 15px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(15px);border-bottom:1px solid var(--line);z-index:40}.icon-btn{width:36px;height:36px;border:0;background:transparent;color:var(--text);font-size:19px}.mobile-brand{text-decoration:none;font-weight:900}.mobile-brand span{color:var(--accent)}
  .page{padding:18px 16px}.hero{min-height:610px;border-radius:20px}.hero-content{padding:55px 28px 120px}.hero h1{font-size:54px}.hero-stats{left:16px;right:16px;bottom:16px}.hero-stats{justify-content:space-around}.hero-stats div{flex:1;text-align:center;padding:11px 6px}
  .split-showcase{grid-template-columns:1fr}.chapter-hero{height:400px;border-radius:19px}.chapter-hero-content{left:25px;right:20px;bottom:28px}.chapter-hero h1{font-size:38px}.chapter-layout{padding:38px 4px 70px}.article-section h2{font-size:31px}
}
@media(max-width:650px){
  .goal-grid{grid-template-columns:1fr}.section-heading{display:block}.section-heading>p{margin-top:8px}.section-block{padding-top:50px}.hero h1{font-size:44px;letter-spacing:-2px}.hero p{font-size:15px}.hero-content{padding-left:22px;padding-right:22px}.hero-stats span{font-size:8px}.showcase-copy h2{font-size:34px}.mini-feature-list{grid-template-columns:1fr}
  .step-grid{grid-template-columns:1fr}.job-grid{grid-template-columns:1fr}.catalog-toolbar{align-items:flex-start;flex-direction:column}.branch-card{grid-template-columns:1fr}.troubleshoot{grid-template-columns:1fr}.chapter-next{align-items:flex-start;gap:15px;flex-direction:column}.site-footer{padding:23px 18px 40px;display:block}.site-footer>span{display:block;margin-top:5px}
}


/* ===== v0.2 MOBILE EXPERIENCE ===== */
:root{
  --mobile-top:58px;
  --mobile-bottom:72px;
  --safe-top:env(safe-area-inset-top, 0px);
  --safe-bottom:env(safe-area-inset-bottom, 0px);
}

html,body{overscroll-behavior-y:none}
img{max-width:100%}
button,a,select{touch-action:manipulation}
button,.btn,.goal-card,.filter-pill,.nav-item,.mobile-bottom-item{min-height:44px}

.mobile-bottom-nav,.mobile-section-nav,.back-to-top{display:none}

@media(max-width:900px){
  body{
    padding-bottom:calc(var(--mobile-bottom) + var(--safe-bottom));
    -webkit-text-size-adjust:100%;
  }

  .content{
    padding-top:calc(var(--mobile-top) + var(--safe-top));
  }

  .mobile-topbar{
    height:calc(var(--mobile-top) + var(--safe-top));
    padding-top:var(--safe-top);
    padding-left:max(12px,env(safe-area-inset-left));
    padding-right:max(12px,env(safe-area-inset-right));
  }

  .icon-btn{
    min-width:44px;
    min-height:44px;
    display:grid;
    place-items:center;
    border-radius:12px;
  }
  .icon-btn:active{background:var(--panel-2)}

  .sidebar{
    width:min(86vw,320px);
    padding-top:calc(18px + var(--safe-top));
    padding-bottom:calc(14px + var(--safe-bottom));
  }
  .nav-item{padding:12px 10px}
  .nav-item .t{font-size:14px}

  .mobile-bottom-nav{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    position:fixed;
    z-index:80;
    left:8px;
    right:8px;
    bottom:max(8px,var(--safe-bottom));
    min-height:64px;
    padding:6px;
    background:color-mix(in srgb,var(--panel) 92%,transparent);
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:0 14px 45px rgba(0,0,0,.35);
    backdrop-filter:blur(18px);
  }
  .mobile-bottom-item{
    border:0;
    background:transparent;
    color:var(--muted);
    text-decoration:none;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:2px;
    border-radius:14px;
    padding:4px 2px;
    cursor:pointer;
  }
  .mobile-bottom-item>span{font-size:19px;line-height:1}
  .mobile-bottom-item small{font-size:9px;font-weight:700}
  .mobile-bottom-item.active{color:var(--text);background:var(--panel-2)}
  .mobile-bottom-main{
    margin:-14px 2px 4px;
    min-height:58px;
    background:var(--accent);
    color:#211406;
    border:4px solid var(--bg);
    box-shadow:0 9px 24px rgba(255,177,92,.27);
  }
  .mobile-bottom-main>span{font-size:23px}
  .mobile-bottom-main small{color:#211406}

  .page{
    padding-left:max(14px,env(safe-area-inset-left));
    padding-right:max(14px,env(safe-area-inset-right));
    padding-bottom:22px;
  }

  .hero{
    min-height:min(72vh,620px);
    border-radius:18px;
  }
  .hero-bg{
    object-position:62% center;
  }
  .hero-vignette{
    background:
      linear-gradient(0deg,rgba(5,9,16,.94) 0%,rgba(5,9,16,.64) 55%,rgba(5,9,16,.26) 100%),
      linear-gradient(90deg,rgba(5,9,16,.82),rgba(5,9,16,.18));
  }
  .hero-content{
    padding:42px 20px 118px;
    align-self:flex-end;
    width:100%;
  }
  .hero h1{
    font-size:clamp(39px,12vw,58px);
    line-height:.98;
    letter-spacing:-2.2px;
  }
  .hero p{
    font-size:15px;
    line-height:1.55;
    max-width:95%;
  }
  .hero-actions{
    width:100%;
    display:grid;
    grid-template-columns:1fr;
  }
  .hero-actions .btn{width:100%;min-height:48px}
  .hero-stats{
    left:10px;
    right:10px;
    bottom:10px;
    border-radius:14px;
  }
  .hero-stats div{padding:9px 3px}
  .hero-stats b{font-size:16px}
  .hero-stats span{font-size:7.5px}

  .section-block{padding:46px 0 8px}
  .section-heading h2{font-size:34px;line-height:1.05}
  .section-heading>p{font-size:14px}
  .goal-card{
    min-height:110px;
    padding:17px;
    border-radius:16px;
  }
  .goal-card p{font-size:12.5px}
  .showcase-card{padding:12px;border-radius:18px}
  .mock-content{padding:24px 20px}
  .mock-content h3{font-size:21px}

  /* Chapter header is shorter and text-safe on small screens */
  .chapter-hero{
    height:min(52vh,410px);
    min-height:345px;
    border-radius:18px;
  }
  .chapter-hero-image{
    object-position:center 35%;
  }
  .chapter-hero-overlay{
    background:
      linear-gradient(0deg,rgba(7,11,20,.96) 0%,rgba(7,11,20,.70) 55%,rgba(7,11,20,.23) 100%);
  }
  .chapter-hero-content{
    left:19px;
    right:19px;
    bottom:22px;
  }
  .breadcrumbs{margin-bottom:14px}
  .chapter-hero h1{
    font-size:clamp(31px,9vw,43px);
    line-height:1.02;
    letter-spacing:-1.4px;
  }
  .chapter-hero p{font-size:14px;line-height:1.45}
  .chapter-tags{
    overflow-x:auto;
    padding-bottom:3px;
    scrollbar-width:none;
    white-space:nowrap;
  }
  .chapter-tags::-webkit-scrollbar{display:none}
  .chapter-tags span{flex:0 0 auto}

  .mobile-section-nav{
    display:flex;
    position:sticky;
    top:calc(var(--mobile-top) + var(--safe-top));
    z-index:35;
    gap:7px;
    overflow-x:auto;
    scrollbar-width:none;
    background:color-mix(in srgb,var(--bg) 94%,transparent);
    border-bottom:1px solid var(--line);
    padding:8px max(14px,env(safe-area-inset-left));
    backdrop-filter:blur(14px);
  }
  .mobile-section-nav::-webkit-scrollbar{display:none}
  .mobile-section-nav[hidden]{display:none}
  .mobile-section-nav a{
    flex:0 0 auto;
    min-height:36px;
    display:flex;
    align-items:center;
    padding:0 11px;
    border-radius:999px;
    background:var(--panel);
    border:1px solid var(--line);
    color:var(--muted);
    text-decoration:none;
    font-size:11px;
    font-weight:750;
  }
  .mobile-section-nav a.active{
    background:var(--accent);
    color:#211406;
    border-color:var(--accent);
  }

  .chapter-layout{
    padding:28px 0 55px;
    gap:0;
  }
  .chapter-intro-card{
    margin-bottom:38px;
    padding:16px;
  }
  .article-section{
    scroll-margin-top:calc(var(--mobile-top) + 54px + var(--safe-top));
    padding-bottom:48px;
  }
  .article-section+.article-section{padding-top:46px}
  .article-section h2{
    font-size:30px;
    line-height:1.08;
    letter-spacing:-.8px;
  }
  .lead-text{font-size:15px}
  .relation-row{
    margin:18px 0;
    overflow-x:auto;
    flex-wrap:nowrap;
    scrollbar-width:none;
    padding-bottom:3px;
  }
  .relation-row::-webkit-scrollbar{display:none}
  .relation-row>*{flex:0 0 auto}

  .step-card,.rule-list>div,.example-box,.tip-box{
    border-radius:14px;
  }
  .step-card{
    padding:15px;
    display:grid;
    grid-template-columns:34px 1fr;
    column-gap:10px;
  }
  .step-card>span{
    grid-row:1/3;
    margin:0;
    width:30px;
    height:30px;
  }
  .step-card p{font-size:12.5px}
  .rule-list>div{padding:14px}
  .rule-list p{font-size:12.5px}
  .example-box,.tip-box{padding:15px}

  /* Filters become horizontal swipe chips */
  .catalog-toolbar{
    gap:10px;
    margin-top:20px;
  }
  .filter-pills{
    width:100%;
    flex-wrap:nowrap;
    overflow-x:auto;
    scrollbar-width:none;
    padding:2px 0 5px;
  }
  .filter-pills::-webkit-scrollbar{display:none}
  .filter-pill{
    flex:0 0 auto;
    min-height:38px;
    padding:8px 12px;
    font-size:11px;
  }
  .catalog-toolbar select{
    width:100%;
    min-height:44px;
    font-size:13px;
    padding:10px 12px;
  }

  .job-card{
    border-radius:16px;
  }
  .job-art{height:190px}
  .job-body{padding:15px}
  .job-title{
    display:grid;
    grid-template-columns:1fr;
    gap:6px;
  }
  .job-title h3{font-size:16px}
  .salary{font-size:13px}
  .job-meta{font-size:11px;gap:12px}
  .job-body p{font-size:13px;line-height:1.5}
  .requirements{font-size:11px;line-height:1.45}

  .branch-card{
    padding:15px;
    gap:7px;
  }
  .branch-card b{font-size:14px}
  .branch-card p{font-size:12.5px;line-height:1.5}
  .trouble-item{padding:14px}
  .trouble-item p{font-size:12.5px}

  .chapter-next{
    margin-top:42px;
    padding:16px;
  }

  /* Search becomes a mobile bottom sheet */
  .search-modal{
    padding:0;
    align-items:flex-end;
  }
  .search-modal.open{display:flex}
  .search-panel{
    width:100%;
    max-width:none;
    margin:auto 0 0;
    max-height:82vh;
    border-radius:22px 22px 0 0;
    padding-bottom:calc(8px + var(--safe-bottom));
  }
  .search-input-wrap{
    height:64px;
    grid-template-columns:auto 1fr;
    padding:0 16px;
  }
  .search-input-wrap kbd{display:none}
  .search-input-wrap input{
    font-size:16px; /* prevents iOS zoom */
  }
  .search-hint{font-size:11px}
  .search-results{max-height:60vh}
  .search-result{
    min-height:64px;
    align-items:flex-start;
    padding:13px;
  }
  .search-result b{font-size:13px}
  .search-result p{font-size:11px;line-height:1.45}

  .toast{
    left:14px;
    right:14px;
    bottom:calc(var(--mobile-bottom) + var(--safe-bottom) + 14px);
    text-align:center;
  }

  .back-to-top{
    display:grid;
    place-items:center;
    position:fixed;
    z-index:70;
    right:15px;
    bottom:calc(var(--mobile-bottom) + var(--safe-bottom) + 18px);
    width:44px;
    height:44px;
    border:1px solid var(--line);
    border-radius:14px;
    background:color-mix(in srgb,var(--panel) 94%,transparent);
    color:var(--text);
    backdrop-filter:blur(12px);
    box-shadow:var(--shadow);
    opacity:0;
    transform:translateY(10px);
    pointer-events:none;
    transition:.2s;
  }
  .back-to-top.show{
    opacity:1;
    transform:none;
    pointer-events:auto;
  }

  .site-footer{
    padding-bottom:calc(26px + var(--mobile-bottom) + var(--safe-bottom));
  }
}

@media(max-width:430px){
  .hero h1{font-size:40px}
  .hero-content{padding-bottom:112px}
  .hero-stats b{font-size:15px}
  .goal-card{grid-template-columns:auto 1fr}
  .goal-card .arrow,.goal-card .soon{grid-column:2;justify-self:start}
  .chapter-hero{min-height:330px}
  .chapter-hero h1{font-size:30px}
  .article-section h2{font-size:27px}
  .job-art{height:176px}
}

/* Better keyboard/accessibility focus */
:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}


/* ===== v1.0 FULL GUIDE ===== */
.page-generic .generic-hero-image{
  filter:saturate(.62) brightness(.72);
  transform:scale(1.035);
}
.generic-chapter-hero:after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 78% 30%,rgba(255,177,92,.14),transparent 30%),
    radial-gradient(circle at 62% 70%,rgba(138,167,255,.10),transparent 34%);
}
.generic-section{
  position:relative;
  padding:18px 0 64px;
  border-bottom:1px solid var(--line);
  scroll-margin-top:30px;
}
.generic-section + .generic-section{padding-top:62px}
.generic-section h2{
  font-size:38px;
  line-height:1.1;
  letter-spacing:-1.2px;
  margin:7px 0 14px;
}
.generic-section .section-anchor{
  top:22px;
}
.generic-purpose{
  margin:20px 0;
  display:flex;
  gap:13px;
  background:linear-gradient(135deg,rgba(138,167,255,.08),rgba(255,177,92,.05));
  border:1px solid var(--line);
  padding:17px;
  border-radius:15px;
}
.generic-purpose>span{font-size:20px}
.generic-purpose b{display:block;font-size:13px;margin-bottom:3px}
.generic-purpose p{margin:0;color:var(--muted);font-size:13px}
.how-list{
  display:grid;
  gap:9px;
  margin:22px 0;
}
.how-item{
  display:grid;
  grid-template-columns:34px 1fr;
  gap:12px;
  align-items:start;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 15px;
}
.how-item .how-num{
  width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;
  color:#241406;background:var(--accent);
  font-size:11px;font-weight:900;
}
.how-item p{margin:4px 0 0;color:var(--muted);font-size:13px}
.fact-list{
  display:grid;
  gap:8px;
  margin:20px 0;
}
.fact-item{
  display:flex;
  gap:11px;
  padding:14px 15px;
  border:1px solid var(--line);
  background:var(--panel);
  border-radius:13px;
}
.fact-item .fact-dot{
  flex:0 0 auto;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent-2);
  margin-top:8px;
  box-shadow:0 0 12px rgba(138,167,255,.45);
}
.fact-item p{margin:0;color:var(--muted);font-size:13px;white-space:pre-wrap}
.callout-box{
  display:flex;
  gap:12px;
  border-radius:15px;
  padding:16px 17px;
  margin-top:16px;
  border:1px solid var(--line);
}
.callout-box>span{font-size:19px}
.callout-box b{display:block;font-size:13px;margin-bottom:3px}
.callout-box p{margin:0;color:var(--muted);font-size:13px}
.callout-example{background:rgba(100,213,160,.07);border-color:rgba(100,213,160,.18)}
.callout-tip{background:rgba(255,177,92,.07);border-color:rgba(255,177,92,.19)}
.callout-warning{background:rgba(255,124,130,.07);border-color:rgba(255,124,130,.20)}
.callout-next{background:rgba(138,167,255,.07);border-color:rgba(138,167,255,.20)}
.generic-next{
  gap:14px;
}
.generic-next .chapter-nav-link{
  min-width:0;
  flex:1;
  text-decoration:none;
  border:1px solid var(--line);
  border-radius:13px;
  padding:12px 14px;
  background:var(--panel-2);
}
.generic-next .chapter-nav-link:hover{border-color:rgba(255,177,92,.28)}
.generic-next .chapter-nav-link small{display:block}
.generic-next .chapter-nav-link b{
  display:block;
  font-size:12px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.generic-next .chapter-nav-link.next{text-align:right}
.generic-tags-empty{display:none}
.on-this-page .chapter-copy-link{
  margin-top:5px;
}
.search-result .sr-path{
  display:block;
  color:var(--subtle);
  font-size:9px;
  margin-top:3px;
}
.nav-item .lock{display:none}
.nav-item .chev{
  color:var(--subtle);
  font-size:11px;
}
.home-all-chapters{
  margin-top:18px;
  display:flex;
  justify-content:flex-end;
}
.home-all-chapters a{
  color:var(--muted);
  font-size:12px;
  text-decoration:none;
}
.home-all-chapters a:hover{color:var(--text)}

@media(max-width:900px){
  .generic-section{
    scroll-margin-top:calc(var(--mobile-top) + 54px + var(--safe-top));
    padding-bottom:48px;
  }
  .generic-section + .generic-section{padding-top:46px}
  .generic-section h2{font-size:30px;letter-spacing:-.8px}
  .generic-purpose,.callout-box{padding:14px}
  .generic-next{flex-direction:column}
  .generic-next .chapter-nav-link{width:100%}
  .generic-next .chapter-nav-link.next{text-align:left}
}
@media(max-width:430px){
  .generic-section h2{font-size:27px}
  .how-item,.fact-item{padding:13px}
}