/* ============================================================
   Web Dev Academy — shared light-theme SHELL
   Used by every tool page for the header, footer/next-nav and
   base typography so all 64 pages feel like one website.
   (The per-tool DEMOS on each page are built with that tool only.)
=============================================================*/
:root{
  --bg:#f6f7fb;
  --surface:#ffffff;
  --surface-2:#f0f1f7;
  --ink:#16161d;
  --ink-soft:#3b3b48;
  --muted:#6b6b7b;
  --line:#e5e6ef;
  --brand:#6d4dff;
  --brand-ink:#5a36f0;
  --brand-soft:#efeaff;
  --cyan:#0bb5c9;
  --green:#16a34a;
  --amber:#d97706;
  --pink:#e23d6d;
  --radius:18px;
  --shadow:0 12px 40px -18px rgba(40,30,90,.28);
  --shadow-sm:0 4px 16px -8px rgba(40,30,90,.2);
  --maxw:1120px;
  --mono:"SF Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:
    radial-gradient(900px 600px at 88% -8%,rgba(109,77,255,.08),transparent 60%),
    radial-gradient(700px 600px at -6% 100%,rgba(11,181,201,.07),transparent 55%),
    var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}

/* ---------- top bar ---------- */
.wda-top{
  position:sticky;top:0;z-index:100;
  display:flex;align-items:center;gap:14px;
  padding:12px 22px;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.wda-top a.home{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.01em;font-size:15px;white-space:nowrap}
.wda-top a.home .dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--brand),var(--cyan));display:inline-block}
.wda-top .crumb{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.wda-top .crumb b{color:var(--ink-soft)}
.wda-top .count{margin-left:auto;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.wda-progress{height:3px;background:var(--line)}
.wda-progress > i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--cyan))}

/* ---------- page wrapper ---------- */
.wda-wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- hero ---------- */
.wda-hero{padding:70px 0 30px;text-align:center}
.wda-chip{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-ink);background:var(--brand-soft);border:1px solid #ddd2ff;padding:6px 14px;border-radius:99px;margin-bottom:18px}
.wda-hero h1{font-size:clamp(40px,8vw,84px);font-weight:900;letter-spacing:-.035em;line-height:.98}
.wda-hero .tagline{color:var(--muted);font-size:clamp(16px,2.2vw,21px);max-width:60ch;margin:18px auto 0;line-height:1.5}

/* ---------- section ---------- */
.wda-sec{padding:42px 0;border-top:1px solid var(--line)}
.wda-sec:first-of-type{border-top:none}
.wda-kicker{font-size:12.5px;font-weight:800;letter-spacing:.04em;color:var(--brand-ink);text-transform:uppercase}
.wda-sec h2{font-size:clamp(24px,3.6vw,34px);font-weight:850;letter-spacing:-.02em;margin:6px 0 10px}
.wda-sec p.lead{color:var(--muted);font-size:16px;max-width:75ch}

/* ---------- demo card ---------- */
.wda-demo{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px;margin-top:18px}
.wda-demo .stage{min-height:120px}

/* ---------- code block ---------- */
.wda-code{margin-top:16px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#0e1018}
.wda-code .bar{display:flex;gap:6px;padding:10px 14px;background:#161925;border-bottom:1px solid #232739}
.wda-code .bar i{width:11px;height:11px;border-radius:50%;display:inline-block}
.wda-code .bar i:nth-child(1){background:#ff5f57}.wda-code .bar i:nth-child(2){background:#febc2e}.wda-code .bar i:nth-child(3){background:#28c840}
.wda-code pre{margin:0;padding:15px 17px;overflow:auto;font-family:var(--mono);font-size:13px;line-height:1.65;color:#e7e7f2}
.wda-code .k{color:#ff7ab6}.wda-code .s{color:#88e0a0}.wda-code .c{color:#7c8294}.wda-code .f{color:#79c0ff}.wda-code .n{color:#ffd479}.wda-code .t{color:#7fd6ff}

/* ---------- generic buttons used by demos ---------- */
.wda-btn{cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-weight:700;font-size:14px;padding:10px 18px;border-radius:10px;transition:.15s;font-family:inherit}
.wda-btn:hover{border-color:var(--brand);color:var(--brand-ink)}
.wda-btn.primary{background:linear-gradient(120deg,var(--brand),var(--brand-ink));border:none;color:#fff;box-shadow:0 10px 24px -12px var(--brand)}
.wda-btn.primary:hover{filter:brightness(1.05);color:#fff}
.wda-controls{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

/* ---------- "built with" honesty note ---------- */
.wda-built{margin-top:22px;display:flex;gap:12px;align-items:flex-start;background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:14px;color:var(--ink-soft)}
.wda-built .ic{flex:none;width:26px;height:26px;border-radius:8px;background:var(--brand-soft);color:var(--brand-ink);display:flex;align-items:center;justify-content:center;font-weight:800}
.wda-built b{color:var(--ink)}

/* ---------- next / prev nav ---------- */
.wda-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:54px 0 40px}
.wda-nav a{display:flex;flex-direction:column;gap:4px;text-decoration:none;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);padding:18px 20px;transition:.18s;box-shadow:var(--shadow-sm)}
.wda-nav a:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow)}
.wda-nav .dir{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.wda-nav .name{font-size:19px;font-weight:850;color:var(--ink);letter-spacing:-.01em}
.wda-nav a.next{text-align:right}
.wda-nav a.next .name{color:var(--brand-ink)}
.wda-nav a.disabled{opacity:.4;pointer-events:none}
.wda-foot{text-align:center;color:var(--muted);font-size:13px;padding:0 0 60px}
.wda-foot a{color:var(--brand-ink);text-decoration:none;font-weight:600}

@media(max-width:600px){
  .wda-nav{grid-template-columns:1fr}
  .wda-hero{padding:48px 0 20px}
}