*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-deep: #06080d;
  --bg-surface: #0c1019;
  --bg-card: #111620;
  --bg-card-hover: #161d2b;
  --cyan: #00e5ff;
  --cyan-dim: #00e5ff22;
  --cyan-glow: #00e5ff44;
  --amber: #ffb347;
  --amber-dim: #ffb34722;
  --text-primary: #e8ecf4;
  --text-secondary: #7a8ba8;
  --text-muted: #4a5568;
  --border: #1a2234;
  --font-mono: 'JetBrains Mono', monospace;
  --font-body: 'Outfit', sans-serif;
}

html { scroll-behavior: smooth; background: var(--bg-deep); }

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 70%);
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.container.wide { max-width: 1100px; }

/* ── Nav ── */
nav {
  padding: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 32px; height: 32px;
  border: 2px solid var(--cyan);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--cyan);
  background: var(--cyan-dim);
  box-shadow: 0 0 20px var(--cyan-dim);
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.04em;
}
.nav-links a:hover { color: var(--cyan); }

/* ── Breadcrumb ── */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin: 24px 0 0;
  letter-spacing: 0.04em;
}
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--cyan); }

/* ── Article ── */
article { padding: 32px 0 64px; }
.article-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
article h1 {
  font-size: clamp(2rem, 5vw, 2.9rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.article-intro {
  font-size: 1.15rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
}
.article-intro strong { color: var(--text-primary); font-weight: 500; }
article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 48px 0 16px;
}
article h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 12px;
}
article p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
  font-size: 1rem;
}
article p strong, article li strong { color: var(--text-primary); font-weight: 500; }
article ul, article ol {
  margin: 0 0 20px 22px;
  color: var(--text-secondary);
  line-height: 1.75;
}
article li { margin-bottom: 8px; }
article a { color: var(--cyan); text-decoration: none; }
article a:hover { text-decoration: underline; }

article code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--amber);
}
article pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  overflow-x: auto;
  margin: 0 0 24px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
article pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.82rem;
  line-height: 1.65;
}

.callout {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  border-radius: 8px;
  padding: 18px 20px;
  margin: 0 0 24px;
}
.callout p { margin: 0; font-size: 0.95rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 12px 14px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  line-height: 1.5;
}
th {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.85rem;
}

/* ── Card grids (hub) ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 32px 0 48px;
}
.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 26px;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--cyan-glow);
  transform: translateY(-2px);
  text-decoration: none !important;
}
.card .card-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.card h3 {
  color: var(--text-primary);
  font-size: 1.08rem;
  font-weight: 600;
  margin: 0 0 8px;
}
.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}
.card .card-cta {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
}

/* ── Email capture box ── */
.signup-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px 32px;
  text-align: center;
  margin: 56px 0 0;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px var(--cyan-dim);
}
.signup-box .section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.signup-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.signup-box > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 460px;
  margin: 0 auto 24px;
}
.waitlist-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
}
.waitlist-form input {
  flex: 1;
  min-width: 0;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 13px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
}
.waitlist-form input:focus { border-color: var(--cyan-glow); }
.waitlist-form button {
  background: var(--cyan);
  color: #06080d;
  border: none;
  border-radius: 8px;
  padding: 13px 22px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  white-space: nowrap;
  transition: filter 0.2s;
}
.waitlist-form button:hover { filter: brightness(1.15); }
.waitlist-form button:disabled { opacity: 0.6; cursor: default; }
.form-success { display: none; }
.form-success.show { display: block; }
.form-success span {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-weight: 700;
  font-size: 1.05rem;
}
.form-success p { color: var(--text-secondary); margin-top: 6px; font-size: 0.9rem; }
.cta-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 14px;
}

/* ── Next/related ── */
.next-links {
  margin: 48px 0 0;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.next-links h2 { margin-top: 0; font-size: 1.1rem; }
.next-links ul { list-style: none; margin-left: 0; }
.next-links li { margin-bottom: 10px; }
.next-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  position: relative;
  z-index: 1;
}
footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer p, footer a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
}
footer a:hover { color: var(--cyan); }

@media (max-width: 560px) {
  .waitlist-form { flex-direction: column; }
  .nav-links { gap: 14px; }
}