@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600&family=Syne:wght@400;600;700;800&display=swap');

:root {
  --bg: #080c0d;
  --bg2: #0c1215;
  --bg3: #111820;
  --bg4: #17202a;
  --border: rgba(57,217,138,.1);
  --border2: rgba(57,217,138,.22);
  --green: #39d98a;
  --green2: #2eb876;
  --glow: rgba(57,217,138,.14);
  --blue: #4da6ff;
  --purple: #c084fc;
  --orange: #fb923c;
  --red: #f87171;
  --yellow: #fbbf24;
  --text: #b4cfd9;
  --text2: #7a9fae;
  --text3: #4a6f7e;
  --bright: #e2f4f8;
  --mono: 'Fira Code',monospace;
  --sans: 'Syne',system-ui,sans-serif;
  --r: 6px;
  --rl: 11px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--bg);color:var(--text);font-family:var(--mono);font-size:14px;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--green);text-decoration:none;transition:color .2s}
a:hover{color:var(--bright)}
ul{list-style:none}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--green)}

body::after{
  content:'';position:fixed;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  opacity:.025;pointer-events:none;z-index:9999
}

/* ── NAV ── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:200;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 2rem;height:60px;
  background:rgba(8,12,13,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border)
}
.nav-logo{display:flex;align-items:center;gap:10px;font-family:var(--sans);font-size:1.15rem;font-weight:700;color:var(--bright)}
.nav-logo .dot{width:9px;height:9px;background:var(--green);border-radius:50%;box-shadow:0 0 9px var(--green);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.nav-links{display:flex;gap:2rem;align-items:center}
.nav-links a{color:var(--text2);font-size:.83rem;letter-spacing:.04em;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-3px;left:0;right:0;height:1px;background:var(--green);transform:scaleX(0);transition:transform .2s}
.nav-links a:hover,.nav-links a.active{color:var(--green)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{padding:7px 18px;background:var(--green)!important;color:var(--bg)!important;border-radius:var(--r);font-weight:600;font-size:.8rem;letter-spacing:.05em;transition:background .2s,transform .15s!important}
.nav-cta::after{display:none!important}
.nav-cta:hover{background:var(--green2)!important;color:var(--bg)!important;transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.hamburger span{display:block;width:22px;height:2px;background:var(--text2);transition:all .3s;border-radius:1px}

/* ── HERO ── */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:80px 2rem 4rem;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 65% 55% at 50% 38%,rgba(57,217,138,.055) 0%,transparent 70%),radial-gradient(ellipse 40% 30% at 85% 80%,rgba(77,166,255,.04) 0%,transparent 60%);z-index:0}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(57,217,138,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(57,217,138,.028) 1px,transparent 1px);background-size:55px 55px;z-index:0;mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black,transparent)}
.hero-content{position:relative;z-index:2;max-width:860px;margin:0 auto;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;background:rgba(57,217,138,.07);border:1px solid var(--border2);border-radius:100px;font-size:.75rem;color:var(--green);letter-spacing:.1em;text-transform:uppercase;margin-bottom:1.8rem;animation:fadeD .6s ease both}
.hero-badge .blink{width:6px;height:6px;background:var(--green);border-radius:50%;animation:blk 1.2s steps(1) infinite}
@keyframes blk{50%{opacity:0}}
@keyframes fadeD{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
@keyframes fadeU{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes fadeI{from{opacity:0}to{opacity:1}}
.hero h1{font-family:var(--sans);font-size:clamp(2.6rem,7vw,5rem);font-weight:800;line-height:1.06;color:var(--bright);margin-bottom:1.4rem;animation:fadeD .6s .1s ease both}
.hero h1 .accent{color:var(--green);position:relative;display:inline-block}
.hero h1 .accent::after{content:'';position:absolute;bottom:4px;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--green),transparent);border-radius:2px}
.hero p{font-size:.98rem;color:var(--text2);max-width:540px;margin:0 auto 2.2rem;line-height:1.85;animation:fadeU .6s .2s ease both}
.hero-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;animation:fadeU .6s .3s ease both;margin-bottom:3rem}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:var(--r);font-family:var(--mono);font-size:.87rem;font-weight:600;letter-spacing:.03em;cursor:pointer;transition:all .2s;border:none;text-decoration:none;line-height:1}
.btn-primary{background:var(--green);color:var(--bg)}
.btn-primary:hover{background:var(--green2);color:var(--bg);transform:translateY(-2px);box-shadow:0 8px 24px rgba(57,217,138,.25)}
.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border2)}
.btn-secondary:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px)}

/* ── GIT GRAPH CANVAS ── */
.git-graph-wrap{position:relative;margin:0 auto;max-width:900px;width:100%;border-radius:var(--rl);overflow:hidden;border:1px solid var(--border);background:var(--bg2);animation:fadeI .8s .5s ease both}
.win-bar{display:flex;align-items:center;gap:7px;padding:10px 14px;background:var(--bg3);border-bottom:1px solid var(--border)}
.win-bar .d{width:10px;height:10px;border-radius:50%}
.win-bar .d:nth-child(1){background:#f87171}
.win-bar .d:nth-child(2){background:#fbbf24}
.win-bar .d:nth-child(3){background:#34d399}
.win-bar .wtitle{margin-left:8px;font-size:.73rem;color:var(--text3);letter-spacing:.05em}
#gitGraphCanvas{display:block;width:100%;height:240px}

/* ── SECTIONS ── */
.section{padding:6rem 2rem;max-width:1100px;margin:0 auto}
.section-label{font-size:.73rem;letter-spacing:.15em;text-transform:uppercase;color:var(--green);margin-bottom:1rem;display:flex;align-items:center;gap:10px}
.section-label::before{content:'//';opacity:.4}
.section h2{font-family:var(--sans);font-size:clamp(1.7rem,4vw,2.7rem);font-weight:700;color:var(--bright);margin-bottom:.9rem;line-height:1.2}
.section p.lead{color:var(--text2);font-size:.95rem;max-width:600px;margin-bottom:3rem}

/* ── STATS ── */
.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--rl);overflow:hidden;margin:0 auto 5rem;max-width:860px}
.stat{background:var(--bg2);padding:2rem 1.5rem;text-align:center}
.stat-num{font-family:var(--sans);font-size:2.4rem;font-weight:800;color:var(--green);display:block;line-height:1;margin-bottom:.4rem}
.stat-label{font-size:.75rem;color:var(--text3);letter-spacing:.09em;text-transform:uppercase}

/* ── FEATURE CARDS ── */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:1.4rem}
.feature-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);padding:1.7rem;transition:border-color .2s,transform .2s}
.feature-card:hover{border-color:var(--border2);transform:translateY(-3px)}
.feature-icon{width:42px;height:42px;border-radius:9px;background:var(--glow);border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:1.1rem}
.feature-card h3{font-family:var(--sans);font-size:1rem;font-weight:600;color:var(--bright);margin-bottom:.45rem}
.feature-card p{font-size:.84rem;color:var(--text2);line-height:1.75}

/* ── TERMINAL ── */
.terminal{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);overflow:hidden;font-family:var(--mono)}
.terminal-header{display:flex;align-items:center;gap:7px;padding:10px 14px;background:var(--bg3);border-bottom:1px solid var(--border)}
.terminal-header .t-title{margin-left:8px;font-size:.73rem;color:var(--text3)}
.terminal-body{padding:1.4rem 1.6rem;min-height:280px;font-size:.83rem;line-height:1.85}
.t-line{margin-bottom:1px}
.t-prompt{color:var(--text2)}
.t-prompt .path{color:var(--blue)}
.t-prompt .branch{color:var(--purple)}
.t-prompt .arr{color:var(--green)}
.t-cmd{color:var(--bright)}
.t-out{color:var(--text2);padding-left:0}
.t-out.ok{color:var(--green)}
.t-out.info{color:var(--blue)}
.t-out.warn{color:var(--orange)}
.t-out.err{color:var(--red)}
.t-cursor{display:inline-block;width:8px;height:14px;background:var(--green);vertical-align:middle;animation:blk 1s steps(1) infinite;margin-left:2px}

/* ── WORKFLOW ── */
.workflow{display:flex;flex-direction:column;gap:1.4rem;max-width:680px}
.workflow-step{display:grid;grid-template-columns:46px 1fr;gap:1.4rem;align-items:start}
.step-num{width:46px;height:46px;border-radius:50%;border:1px solid var(--border2);display:flex;align-items:center;justify-content:center;font-family:var(--sans);font-weight:700;color:var(--green);font-size:.88rem;flex-shrink:0}
.step-content h4{font-family:var(--sans);font-size:.97rem;font-weight:600;color:var(--bright);margin-bottom:.35rem}
.step-content p{font-size:.84rem;color:var(--text2)}
.step-cmd{display:inline-block;margin-top:.45rem;padding:3px 9px;background:var(--bg3);border:1px solid var(--border);border-radius:4px;font-size:.78rem;color:var(--green)}

/* ── FOOTER ── */
footer{border-top:1px solid var(--border);padding:3rem 2rem;margin-top:4rem}
.footer-inner{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:3rem;align-items:start}
.footer-brand{display:flex;flex-direction:column;gap:.8rem}
.footer-brand .logo{font-family:var(--sans);font-size:1.05rem;font-weight:700;color:var(--bright);display:flex;align-items:center;gap:8px}
.footer-brand .logo .dot{width:8px;height:8px;background:var(--green);border-radius:50%}
.footer-brand p{font-size:.81rem;color:var(--text3);max-width:250px;line-height:1.65}
.footer-col h5{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text2);margin-bottom:.9rem}
.footer-col li{margin-bottom:.55rem}
.footer-col li a{font-size:.83rem;color:var(--text3);transition:color .2s}
.footer-col li a:hover{color:var(--green)}
.footer-bottom{max-width:1100px;margin:2rem auto 0;padding-top:2rem;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:.77rem;color:var(--text3)}

/* ── LEARN PAGE ── */
.learn-layout{display:grid;grid-template-columns:255px 1fr;min-height:calc(100vh - 60px);margin-top:60px}
.learn-sidebar{position:sticky;top:60px;height:calc(100vh - 60px);overflow-y:auto;background:var(--bg2);border-right:1px solid var(--border);padding:1.8rem 0}
.learn-sidebar::-webkit-scrollbar{width:3px}
.sb-section{margin-bottom:1.4rem}
.sb-section-title{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text3);padding:0 1.4rem;margin-bottom:.5rem}
.sb-item{display:flex;align-items:center;gap:9px;padding:8px 1.4rem;font-size:.83rem;color:var(--text2);cursor:pointer;transition:background .15s,color .15s;border-left:2px solid transparent}
.sb-item:hover{background:rgba(57,217,138,.04);color:var(--text)}
.sb-item.active{background:rgba(57,217,138,.07);color:var(--green);border-left-color:var(--green)}
.sb-item .cbadge{font-size:.7rem;padding:1px 6px;background:var(--bg4);border-radius:3px;color:var(--text3);margin-left:auto}
.learn-content{padding:3rem 3.5rem;max-width:760px}
.learn-topic{display:none;animation:fadeI .3s ease}
.learn-topic.active{display:block}
.topic-header{margin-bottom:2.5rem}
.topic-header .ttag{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--green);margin-bottom:.5rem}
.topic-header h2{font-family:var(--sans);font-size:2rem;font-weight:700;color:var(--bright);margin-bottom:.7rem;line-height:1.2}
.topic-header p{color:var(--text2);font-size:.93rem;max-width:560px}

.cmd-block{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);margin-bottom:1.8rem;overflow:hidden}
.cmd-block-hdr{display:flex;align-items:center;justify-content:space-between;padding:11px 17px;background:var(--bg3);border-bottom:1px solid var(--border)}
.cmd-name{font-family:var(--mono);font-size:.88rem;color:var(--green);font-weight:600}
.cmd-cat{font-size:.7rem;padding:3px 8px;background:rgba(57,217,138,.07);border:1px solid var(--border2);border-radius:4px;color:var(--text3);letter-spacing:.06em;text-transform:uppercase}
.cmd-body{padding:1.4rem 1.7rem}
.cmd-desc{color:var(--text2);font-size:.87rem;margin-bottom:1.1rem;line-height:1.8}
.cmd-syntax{background:var(--bg);border:1px solid var(--border);border-radius:var(--r);padding:.9rem 1.1rem;margin-bottom:1.1rem;font-size:.83rem;overflow-x:auto}
.syn-line{display:flex;align-items:center;gap:7px;margin-bottom:3px}
.syn-line:last-child{margin-bottom:0}
.syn-p{color:var(--text3);user-select:none}
.syn-c{color:var(--bright)}
.syn-a{color:var(--blue)}
.syn-o{color:var(--orange)}
.syn-cm{color:var(--text3);font-style:italic}
.flags-list{display:flex;flex-direction:column;gap:0}
.flag-row{display:grid;grid-template-columns:155px 1fr;gap:.8rem;font-size:.81rem;padding:6px 0;border-bottom:1px solid var(--border);align-items:baseline}
.flag-row:last-child{border:none}
.flag-n{color:var(--orange);font-family:var(--mono)}
.flag-d{color:var(--text2)}
.mini-term{background:var(--bg);border-radius:var(--r);padding:.9rem 1.1rem;font-size:.8rem;line-height:1.9;border:1px solid var(--border);margin-top:.9rem;position:relative;overflow:hidden}
.mini-term::before{content:'example';position:absolute;top:7px;right:9px;font-size:.63rem;color:var(--text3);letter-spacing:.1em;text-transform:uppercase}
.callout{padding:1.1rem 1.4rem;border-radius:var(--r);border-left:3px solid;margin:1.4rem 0;font-size:.85rem;line-height:1.75}
.callout-tip{background:rgba(57,217,138,.05);border-color:var(--green);color:var(--text2)}
.callout-warn{background:rgba(251,146,60,.05);border-color:var(--orange);color:var(--text2)}
.callout-danger{background:rgba(248,113,113,.05);border-color:var(--red);color:var(--text2)}
.callout strong{display:block;margin-bottom:3px;font-weight:600}
.callout-tip strong{color:var(--green)}
.callout-warn strong{color:var(--orange)}
.callout-danger strong{color:var(--red)}
.divider{height:1px;background:var(--border);margin:2.5rem 0}
code{font-family:var(--mono);font-size:.86em;padding:1px 5px;background:var(--bg3);border:1px solid var(--border);border-radius:3px;color:var(--green)}

/* ── CHEATSHEET ── */
.cs-hero{background:var(--bg2);border-bottom:1px solid var(--border);padding:4.5rem 2rem;text-align:center;margin-top:60px}
.cs-hero h1{font-family:var(--sans);font-size:clamp(2rem,5vw,3.2rem);font-weight:800;color:var(--bright);margin-bottom:.8rem}
.cs-hero p{color:var(--text2);font-size:.93rem}
.cs-body{max-width:1200px;margin:0 auto;padding:3rem 2rem}
.cs-filter{display:flex;gap:.6rem;margin-bottom:2rem;flex-wrap:wrap}
.cs-filter-btn{padding:5px 14px;border-radius:100px;border:1px solid var(--border);background:transparent;color:var(--text2);font-family:var(--mono);font-size:.78rem;cursor:pointer;transition:all .2s}
.cs-filter-btn:hover,.cs-filter-btn.active{border-color:var(--green);color:var(--green);background:var(--glow)}
.cs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.4rem}
.cs-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--rl);overflow:hidden}
.cs-card-hdr{padding:13px 17px;background:var(--bg3);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:9px}
.cs-card-hdr h3{font-family:var(--sans);font-size:.88rem;font-weight:600;color:var(--bright)}
.cs-cmd-row{display:grid;grid-template-columns:1fr 1fr;gap:0;padding:7px 17px;border-bottom:1px solid var(--border);align-items:center;cursor:default;transition:background .15s}
.cs-cmd-row:last-child{border-bottom:none}
.cs-cmd-row:hover{background:rgba(57,217,138,.03)}
.cs-cmd{font-size:.79rem;color:var(--green);font-family:var(--mono)}
.cs-desc{font-size:.77rem;color:var(--text3)}

/* ── PLAYGROUND ── */
.pg-layout{display:grid;grid-template-columns:1fr 360px;height:calc(100vh - 60px);margin-top:60px}
.pg-terminal-wrap{display:flex;flex-direction:column;border-right:1px solid var(--border);background:var(--bg)}
.pg-term-hdr{display:flex;align-items:center;gap:7px;padding:11px 15px;background:var(--bg3);border-bottom:1px solid var(--border);flex-shrink:0}
.pg-term-hdr .ph-title{font-size:.78rem;color:var(--text2);margin-left:7px}
.pg-term-hdr .ph-branch{margin-left:auto;font-size:.74rem;color:var(--purple);display:flex;align-items:center;gap:5px}
.pg-output{flex:1;overflow-y:auto;padding:1.4rem 1.6rem;font-size:.82rem;line-height:1.85}
.pg-line{word-break:break-all}
.pg-input-wrap{display:flex;align-items:center;gap:7px;padding:11px 15px;border-top:1px solid var(--border);background:var(--bg2);flex-shrink:0}
.pg-prompt-txt{display:flex;align-items:center;gap:4px;white-space:nowrap;font-size:.82rem}
.pg-input{flex:1;background:transparent;border:none;outline:none;color:var(--bright);font-family:var(--mono);font-size:.82rem;caret-color:var(--green)}
.pg-sidebar{display:flex;flex-direction:column;overflow:hidden;background:var(--bg2)}
.pg-sb-hdr{padding:11px 15px;background:var(--bg3);border-bottom:1px solid var(--border);font-size:.72rem;color:var(--text3);letter-spacing:.09em;text-transform:uppercase;flex-shrink:0}
.pg-graph-wrap{padding:1rem;border-bottom:1px solid var(--border);flex-shrink:0}
#pgGraphCanvas{width:100%;height:180px;display:block;border-radius:var(--r);border:1px solid var(--border);background:var(--bg)}
.pg-state{flex:1;overflow-y:auto;padding:1rem}
.pg-state-section{margin-bottom:1.4rem}
.pg-state-title{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text3);margin-bottom:.5rem}
.pg-state-item{display:flex;align-items:center;gap:7px;font-size:.79rem;padding:3px 0;color:var(--text2)}
.badge{font-size:.67rem;padding:1px 5px;border-radius:3px;background:var(--bg3);border:1px solid var(--border)}
.badge.staged{border-color:var(--green);color:var(--green)}
.badge.modified{border-color:var(--orange);color:var(--orange)}
.badge.untracked{border-color:var(--text3);color:var(--text3)}
.badge.current{border-color:var(--green);color:var(--green);background:var(--glow)}
.badge.branch{border-color:var(--purple);color:var(--purple)}
.pg-hint{padding:.9rem 1rem;background:rgba(57,217,138,.04);border:1px solid var(--border);border-radius:var(--r);font-size:.77rem;color:var(--text3);line-height:1.7;margin:1rem}
.pg-hint strong{color:var(--green);font-weight:500}
.pg-commands-ref{padding:0 1rem 1rem}
.pg-cmd-ref-row{display:flex;justify-content:space-between;padding:4px 0;font-size:.77rem;border-bottom:1px solid var(--border)}
.pg-cmd-ref-row:last-child{border:none}
.pg-cmd-ref-row .c{color:var(--green)}
.pg-cmd-ref-row .d{color:var(--text3)}

/* ── REVEAL ANIM ── */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.reveal.visible{opacity:1;transform:none}

/* ── PROGRESS (learn) ── */
.learn-progress{position:fixed;top:60px;left:0;right:0;height:2px;background:var(--border);z-index:50}
.learn-progress-bar{height:100%;background:var(--green);transition:width .4s ease}

/* ── MISC ── */
.copy-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;background:var(--bg4);border:1px solid var(--border);border-radius:4px;color:var(--text3);font-size:.7rem;cursor:pointer;transition:all .2s;font-family:var(--mono)}
.copy-btn:hover{border-color:var(--border2);color:var(--text)}
.copy-btn.copied{border-color:var(--green);color:var(--green)}
.hl-b{color:var(--purple)}
.hl-s{color:var(--yellow)}
.hl-f{color:var(--blue)}
.hl-h{color:var(--orange);font-size:.88em}
.hl-br{color:var(--purple)}
.hl-ok{color:var(--green)}
.hl-err{color:var(--red)}

/* ── RESPONSIVE ── */
@media(max-width:1024px){
  .learn-layout{grid-template-columns:220px 1fr}
  .pg-layout{grid-template-columns:1fr}
  .pg-sidebar{display:none}
}
@media(max-width:768px){
  nav{padding:0 1rem}
  .nav-links{display:none}
  .nav-links.open{display:flex;flex-direction:column;position:fixed;top:60px;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--border);padding:1.5rem;gap:1rem;z-index:199}
  .hamburger{display:flex}
  .learn-layout{grid-template-columns:1fr}
  .learn-sidebar{position:static;height:auto;border-right:none;border-bottom:1px solid var(--border);overflow-x:auto;white-space:nowrap;padding:0;display:flex;flex-direction:row}
  .sb-section{margin:0}
  .sb-section-title{display:none}
  .sb-item{display:inline-flex;border-left:none!important;border-bottom:2px solid transparent;padding:12px 16px}
  .sb-item.active{border-bottom-color:var(--green)!important;background:none!important}
  .learn-content{padding:2rem 1rem}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .section{padding:4rem 1.2rem}
  .flag-row{grid-template-columns:1fr;gap:3px}
  .cs-grid{grid-template-columns:1fr}
  .hero h1{font-size:2.1rem}
}