:root {
  --bg: #070b12;
  --surface: rgba(14, 20, 32, 0.88);
  --surface2: rgba(22, 30, 48, 0.95);
  --text: #eef2ff;
  --muted: #94a3b8;
  --accent: #67e8f9;
  --accent2: #c084fc;
  --accent3: #34d399;
  --border: rgba(148, 163, 184, 0.16);
  --border-strong: rgba(103, 232, 249, 0.28);
  --ok: #34d399;
  --radius: 16px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: var(--sans);
  background:
    radial-gradient(900px 520px at 8% -8%, rgba(103, 232, 249, 0.14), transparent 58%),
    radial-gradient(760px 480px at 92% 4%, rgba(192, 132, 252, 0.12), transparent 55%),
    radial-gradient(600px 400px at 50% 110%, rgba(52, 211, 153, 0.06), transparent 60%),
    var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 20%, black, transparent 78%);
}
a { color: var(--accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: #a5f3fc; text-decoration: none; }
.wrap { position: relative; max-width: 1120px; margin: 0 auto; padding: 1.5rem 1.25rem 4.5rem; }
header.hero {
  position: relative;
  overflow: hidden;
  padding: 2.25rem 2rem 2rem;
  border: 1px solid var(--border-strong);
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(135deg, rgba(103,232,249,0.08), rgba(192,132,252,0.06) 48%, rgba(255,255,255,0.02)),
    var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}
header.hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -8%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(103,232,249,0.18), transparent 68%);
  pointer-events: none;
}
.hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 700;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 12px rgba(103,232,249,0.65);
}
.hero-badge {
  font-size: 0.78rem;
  color: var(--muted);
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,0.03);
}
h1 {
  font-size: clamp(2rem, 4.8vw, 3.1rem);
  margin: 0.35rem 0 0.65rem;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 14ch;
}
.tagline {
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  max-width: 46ch;
  margin: 0;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1.75rem 0 0.25rem;
}
.stat {
  padding: 0.85rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.stat strong {
  display: block;
  font-size: 1.45rem;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat span { color: var(--muted); font-size: 0.82rem; }
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1.35rem;
}
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(0,0,0,0.22);
}
.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.48rem 0.95rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease;
}
.lang-switch button.active {
  background: linear-gradient(135deg, rgba(103,232,249,0.18), rgba(192,132,252,0.14));
  color: var(--text);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.58rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.btn:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
  background: rgba(255,255,255,0.07);
}
.btn.primary {
  background: linear-gradient(135deg, rgba(103,232,249,0.22), rgba(192,132,252,0.18));
  border-color: rgba(103,232,249,0.35);
  box-shadow: 0 8px 28px rgba(103,232,249,0.12);
}
.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.35rem 0 0.25rem;
  padding: 0;
  list-style: none;
}
.page-nav a {
  display: inline-flex;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
}
.page-nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,0.04);
}
section { margin-top: 2.75rem; scroll-margin-top: 1.25rem; }
.section-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.section-head::before {
  content: "";
  width: 4px;
  height: 1.35rem;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
}
h2 { font-size: 1.45rem; margin: 0; letter-spacing: -0.02em; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.15rem 1.2rem;
  backdrop-filter: blur(8px);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(103,232,249,0.22);
  box-shadow: 0 14px 40px rgba(0,0,0,0.22);
}
.card h3 { margin: 0 0 0.35rem; font-size: 1.06rem; line-height: 1.25; }
.meta { color: var(--muted); font-size: 0.86rem; margin-bottom: 0.65rem; }
.pill {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  margin-right: 0.35rem;
  margin-top: 0.35rem;
}
.pill.lab { color: var(--ok); border-color: rgba(52,211,153,0.35); background: rgba(52,211,153,0.08); }
.pill.soon { opacity: 0.75; }
.pill.done { color: var(--ok); border-color: rgba(52,211,153,0.45); background: rgba(52,211,153,0.1); }
.pill.track-economy { color: #fcd34d; border-color: rgba(252,211,77,0.35); }
.pill.track-advanced { color: #f472b6; border-color: rgba(244,114,182,0.35); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.85rem; }
.actions a { font-size: 0.88rem; font-weight: 600; }
footer {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
code.inline {
  font-family: var(--mono);
  font-size: 0.84em;
  background: rgba(255,255,255,0.06);
  padding: 0.14rem 0.4rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.quickstart-card { padding: 0; overflow: hidden; }
.quickstart-intro { padding: 1.15rem 1.2rem 0.85rem; color: var(--muted); margin: 0; }
.terminal {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.18));
}
.terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.terminal-dots { display: inline-flex; gap: 0.35rem; }
.terminal-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.12);
}
.terminal-dots span:nth-child(1) { background: #fb7185; }
.terminal-dots span:nth-child(2) { background: #fbbf24; }
.terminal-dots span:nth-child(3) { background: #34d399; }
.terminal-title {
  flex: 1;
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--mono);
}
.terminal-copy {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--sans);
}
.terminal-copy:hover { border-color: var(--border-strong); }
.terminal-body {
  margin: 0;
  padding: 1rem 1.1rem 1.15rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: #dbeafe;
}
.terminal-line { display: block; white-space: pre; }
.terminal-line .prompt { color: var(--accent3); user-select: none; }
.terminal-line.cmd { color: #e2e8f0; }
.progress-bar {
  height: 10px; border-radius: 999px; background: rgba(255,255,255,0.04);
  border: 1px solid var(--border); overflow: hidden; margin: 1rem 0 0.5rem;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
  transition: width 0.25s ease;
}
.progress-label { color: var(--muted); font-size: 0.9rem; margin: 0 0 1rem; }
.cert-intro { margin-top: 0; color: var(--muted); }
.cert-grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-bottom: 1.25rem; }
.cert-grid h3 { margin: 0 0 0.5rem; font-size: 0.95rem; }
.checklist { display: grid; gap: 0.45rem; }
.check-row {
  display: flex; align-items: flex-start; gap: 0.55rem;
  font-size: 0.9rem; color: var(--text); cursor: pointer;
  padding: 0.35rem 0.45rem;
  border-radius: 10px;
  transition: background 0.15s ease;
}
.check-row:hover { background: rgba(255,255,255,0.04); }
.check-row input { margin-top: 0.2rem; accent-color: var(--accent); }
.cert-form { display: grid; gap: 0.65rem; max-width: 420px; margin-top: 0.5rem; }
.cert-form label { font-size: 0.85rem; color: var(--muted); }
.cert-form input {
  padding: 0.7rem 0.9rem; border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--text); font: inherit;
}
.cert-form input:focus {
  outline: none;
  border-color: var(--border-strong);
  box-shadow: 0 0 0 3px rgba(103,232,249,0.12);
}
.cert-form input.invalid { border-color: #f87171; }
.cert-hint { color: var(--muted); font-size: 0.85rem; margin: 0; }
.lab-doc {
  white-space: pre-wrap;
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-family: var(--mono);
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.18);
}
.run-local { margin: 0.75rem 0 0; color: var(--muted); font-size: 0.88rem; }
button.btn { cursor: pointer; font: inherit; }
button.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
@media (max-width: 720px) {
  header.hero { padding: 1.5rem 1.15rem; }
  .hero-stats { grid-template-columns: 1fr; }
  h1 { max-width: none; }
}