/* ── Reset & base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:   #2563eb;
  --blue-d: #1d4ed8;
  --teal:   #0d9488;
  --dark:   #0f172a;
  --mid:    #1e293b;
  --muted:  #64748b;
  --light:  #f8fafc;
  --border: #e2e8f0;
  --code-bg:#1e293b;
  --radius: 8px;
  --max-w:  960px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1e293b;
  background: #fff;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ──────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  border-bottom: 1px solid #334155;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0 1.5rem;
  height: 56px;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: -.3px;
  white-space: nowrap;
}
.nav-brand span { color: var(--teal); }

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
  margin-left: auto;
}

.nav-links a {
  display: block;
  padding: .4rem .85rem;
  color: #94a3b8;
  font-size: .9rem;
  border-radius: 6px;
  transition: color .15s, background .15s;
}
.nav-links a:hover, .nav-links a.active {
  color: #fff;
  background: #1e293b;
  text-decoration: none;
}

/* ── Page wrapper ─────────────────────────────────────── */
.page { max-width: var(--max-w); margin: 0 auto; padding: 3rem 1.5rem 5rem; }

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #1a3050 100%);
  color: #fff;
  padding: 5rem 1.5rem 4.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -.5px;
  line-height: 1.15;
  margin-bottom: 1.1rem;
}
.hero h1 em { color: var(--teal); font-style: normal; }

.hero .tagline {
  font-size: 1.2rem;
  color: #94a3b8;
  max-width: 600px;
  margin: 0 auto 2.2rem;
}

.btn {
  display: inline-block;
  padding: .65rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .95rem;
  transition: background .15s, transform .1s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-d); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid #475569; margin-left: .8rem; }
.btn-outline:hover { background: #1e293b; border-color: #64748b; }

/* ── Cards ────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  background: var(--light);
}

.card .icon { font-size: 1.6rem; margin-bottom: .6rem; }
.card h3 { font-size: 1rem; font-weight: 700; margin-bottom: .4rem; }
.card p { font-size: .9rem; color: var(--muted); }

/* ── Sections ─────────────────────────────────────────── */
h1, h2, h3, h4 { color: var(--dark); font-weight: 700; }
h1 { font-size: 2rem; margin-bottom: 1rem; }
h2 { font-size: 1.4rem; margin-top: 2.8rem; margin-bottom: .7rem; padding-bottom: .4rem; border-bottom: 2px solid var(--border); }
h3 { font-size: 1.05rem; margin-top: 1.6rem; margin-bottom: .4rem; }
h4 { font-size: .95rem; margin-top: 1.2rem; margin-bottom: .3rem; color: var(--muted); }

p { margin-bottom: .9rem; }
ul, ol { padding-left: 1.4rem; margin-bottom: .9rem; }
li { margin-bottom: .3rem; }

.lead { font-size: 1.1rem; color: #334155; margin-bottom: 1.5rem; }

/* ── Code ─────────────────────────────────────────────── */
code {
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
  font-size: .85em;
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .1em .35em;
}

pre {
  background: var(--code-bg);
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  overflow-x: auto;
  margin: 1.2rem 0 1.5rem;
  font-size: .875rem;
  line-height: 1.65;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* simple token colours */
.kw  { color: #7dd3fc; }   /* keyword / type */
.cl  { color: #86efac; }   /* class / interface */
.st  { color: #fda4af; }   /* string */
.cm  { color: #64748b; font-style: italic; } /* comment */
.nu  { color: #fdba74; }   /* number */
.fn  { color: #c4b5fd; }   /* method / function */

/* ── Badges / tags ────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  background: #dbeafe;
  color: #1d4ed8;
  margin-right: .4rem;
}
.badge.green { background: #d1fae5; color: #065f46; }
.badge.gray  { background: #f1f5f9; color: #475569; }

/* ── Comparison table ─────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: .9rem;
}
th {
  background: var(--dark);
  color: #fff;
  padding: .65rem 1rem;
  text-align: left;
}
td {
  padding: .6rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
tr:nth-child(even) td { background: var(--light); }

/* ── Ecosystem grid ───────────────────────────────────── */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.eco-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  background: #fff;
}
.eco-card h3 { margin-top: 0; font-size: .95rem; color: var(--blue); }
.eco-card p  { font-size: .875rem; color: var(--muted); margin: 0; }
.eco-card .dep { font-size: .78rem; color: #94a3b8; margin-top: .4rem; }

/* ── Alert / note ─────────────────────────────────────── */
.note {
  background: #eff6ff;
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: .9rem 1.2rem;
  margin: 1.2rem 0;
  font-size: .9rem;
  color: #1e40af;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
}
footer a { color: var(--muted); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: .5rem 1rem;
    gap: .25rem;
  }
  .nav-brand {
    flex: 1 0 100%;
    padding: .25rem 0;
  }
  .nav-links {
    margin-left: 0;
    flex-wrap: wrap;
    gap: .1rem;
  }
  .nav-links a { padding: .3rem .5rem; font-size: .78rem; }
  .hero { padding: 3rem 1rem 3rem; }
  .btn-outline { display: none; }
}