:root{
  --bg:#0f1117;--surface:#171a22;--surface-2:#12141b;--ink:#e6eaf2;--muted:#8790a3;--line:#252a35;
  --hover:rgba(255,255,255,.05);--accent:#5eead4;--onaccent:#062019;--accent-soft:rgba(94,234,212,.14);
  --accent-shadow:rgba(94,234,212,.2);--danger:#f4547f;--warning:#ffd479;--code-bg:#0b0d12;--console:#080a0e;
  --display:'Space Grotesk',system-ui,sans-serif;--body:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',ui-monospace,monospace;
  --radius:14px;--button-radius:10px;--shadow:0 24px 70px rgba(0,0,0,.42);--max:1160px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{color:inherit}
::selection{background:var(--accent);color:var(--onaccent)}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}.mono{font-family:var(--mono)}.muted{color:var(--muted)}
.brand{display:inline-flex;align-items:center;gap:.45em;font-family:var(--mono);font-weight:400;letter-spacing:-.5px}.brand-mark{display:block;flex:none;width:1.35em;height:1.35em}.brand-name b{font-weight:700}.brand-beta{font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:2px 7px;margin-left:7px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--button-radius);padding:11px 18px;cursor:pointer;font-weight:700;font-size:14px;transition:transform .15s,border-color .15s,background .15s,filter .15s}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--accent);color:var(--onaccent)}.btn-primary:hover{filter:brightness(.95)}.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}.btn-ghost:hover{border-color:var(--accent)}.btn-sm{padding:8px 12px;font-size:13px}.btn-block{width:100%}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.pill{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:4px 9px;font:700 10px/1.4 var(--mono);letter-spacing:.8px;text-transform:uppercase;background:var(--accent-soft);color:var(--accent)}
.eyebrow{font:600 10px/1.4 var(--mono);letter-spacing:2px;text-transform:uppercase;color:var(--muted)}
.section-label{font:600 11px/1.4 var(--mono);letter-spacing:1.8px;text-transform:uppercase;color:var(--muted);margin:30px 0 12px}
.field{display:grid;gap:7px}.field label{font:700 11px/1.3 var(--mono);text-transform:uppercase;letter-spacing:.7px;color:var(--muted)}
input,textarea,select{width:100%;border:1px solid var(--line);border-radius:10px;background:#0d0f15;color:var(--ink);padding:11px 12px;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--accent)}textarea{resize:vertical}
.footer{border-top:1px solid var(--line);margin-top:64px;padding:26px 0 34px;color:var(--muted);font-size:13px}.footer-inner>div:first-child{display:flex;align-items:center;flex-wrap:wrap;gap:0 .35em}.footer-inner{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer a:hover{color:var(--accent)}
.notice{border:1px solid var(--line);background:var(--accent-soft);color:#b3bbcb;border-radius:12px;padding:12px 14px;font-size:13px}.notice strong{color:var(--accent)}
.code-window{background:var(--code-bg);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.code-head{display:flex;align-items:center;gap:7px;padding:12px 14px;border-bottom:1px solid var(--line);color:var(--muted);font:12px var(--mono)}.dot{width:10px;height:10px;border-radius:50%}.dot.red{background:#ff5f57}.dot.yellow{background:#febc2e}.dot.green{background:#28c840}.code-title{margin-left:8px}.code-body{margin:0;padding:20px;color:#e6eaf2;font:13px/1.75 var(--mono);white-space:pre-wrap;overflow:auto}.tok-k{color:#c792ea}.tok-s{color:#5eead4}.tok-n{color:#ffd479}.tok-c{color:#5b6478}
.skip-link{position:absolute;left:-999px;top:10px;background:var(--accent);color:var(--onaccent);padding:8px 12px;border-radius:8px;z-index:999}.skip-link:focus{left:10px}
@media(max-width:700px){.container{width:min(100% - 28px,var(--max))}.footer-inner{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
.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}
.motion-off *{animation:none!important;transition:none!important;scroll-behavior:auto!important}

/* Learners need to see the characters they will type: no joined === or => glyphs. */
code,pre,kbd,textarea,.ce-hl,.ce-input{font-variant-ligatures:none!important;font-feature-settings:"liga" 0,"calt" 0!important}