/* ============================================================
   nullock — design tokens & base styles
   Cyberpunk minimalism. Dark. Purple gradient accents.
   ============================================================ */

:root {
  /* surfaces */
  --bg:            #0a0a0f;
  --surface-1:     #14141a;   /* card */
  --surface-2:     #1c1c24;   /* code blocks */
  --surface-feat:  #161020;   /* featured / tinted */
  --divider:       #1c1c24;
  --border:        #2a2a35;
  --border-focus:  #3a3a4a;

  /* text */
  --headline:      #ffffff;
  --body:          #e8e8ee;
  --secondary:     #b0b0b8;
  --dim:           #888888;
  --footer:        #555555;

  /* purple */
  --purple:        #9d4edd;
  --purple-end:    #5a189a;
  --purple-light:  #d4b9ff;
  --purple-mid:    #b7a3d6;

  /* status */
  --ok:            #4ade80;
  --warn:          #fbbf24;
  --err:           #f87171;

  /* gradients (driven by tweaks) */
  --grad-angle:    135deg;
  --brand-grad:    linear-gradient(var(--grad-angle), var(--purple) 0%, var(--purple-end) 100%);
  --hero-grad:     linear-gradient(var(--grad-angle), var(--purple-light) 0%, var(--purple) 50%, var(--purple-end) 100%);

  /* tweakable */
  --glow-strength: 0.18;

  /* fonts */
  --font-ui:   -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace;

  /* layout */
  --pad-x: 32px;
  --maxw-marketing: 920px;
  --maxw-docs: 800px;
  --maxw-wide: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(157, 78, 221, 0.35); color: #fff; }

a { color: var(--purple-mid); text-decoration: none; }
a:hover { color: var(--purple-light); }

code, pre, .mono { font-family: var(--font-mono); }

img { max-width: 100%; display: block; }

/* ---------- type ---------- */
h1, h2, h3, h4 { color: var(--headline); margin: 0; font-weight: 700; text-wrap: balance; }

.h1-hero {
  font-size: 52px; font-weight: 700; line-height: 1.08; letter-spacing: -1.5px;
}
.h1-page {
  font-size: 40px; font-weight: 700; line-height: 1.15; letter-spacing: -1px;
}
.h2-section {
  font-size: 29px; font-weight: 700; line-height: 1.2; letter-spacing: -0.4px;
}
h3 { font-size: 18px; font-weight: 600; line-height: 1.3; }

.lead {
  font-size: 18.5px; line-height: 1.6; color: var(--secondary);
  text-wrap: pretty; max-width: 60ch;
}
.caption { font-size: 12.5px; line-height: 1.5; color: var(--dim); }
.eyebrow {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.5px;
  color: var(--purple-mid); text-transform: none;
}

.grad-text {
  background: var(--hero-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- layout helpers ---------- */
.wrap { max-width: var(--maxw-marketing); margin: 0 auto; padding-inline: var(--pad-x); }
.wrap-wide { max-width: var(--maxw-wide); margin: 0 auto; padding-inline: var(--pad-x); }
.wrap-docs { max-width: var(--maxw-docs); margin: 0 auto; padding-inline: var(--pad-x); }
.section { padding-block: 60px; }
.section + .section { padding-top: 0; }
.divider-line { border: 0; border-top: 1px solid var(--divider); margin: 0; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--divider);
}
.nav-inner {
  max-width: var(--maxw-wide); margin: 0 auto;
  padding: 16px var(--pad-x);
  display: flex; align-items: center; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 18px; letter-spacing: -0.4px;
}
.brand .mark { width: 22px; height: 22px; display: block; }
.brand .word {
  background: var(--brand-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.nav-links {
  margin-left: auto; display: flex; align-items: center; gap: 22px;
}
.nav-links a:not(.btn) {
  color: var(--secondary); font-size: 14px; font-weight: 500;
}
.nav-links a:not(.btn):hover { color: var(--body); }
.nav-links a.active { color: var(--purple-light); }
.nav-toggle {
  display: none; margin-left: auto;
  background: none; border: 1px solid var(--border); border-radius: 6px;
  color: var(--body); width: 38px; height: 34px; cursor: pointer; font-size: 16px;
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0; margin: 0;
    background: rgba(10,10,15,0.97); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--divider); padding: 8px var(--pad-x) 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--divider); }
  .nav-links .btn { margin-top: 12px; text-align: center; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-ui); font-size: 14px; font-weight: 600;
  padding: 13px 22px; border-radius: 6px; border: 1px solid transparent;
  cursor: pointer; transition: transform .12s ease, filter .12s ease, border-color .12s ease, background .12s ease, color .12s ease;
  white-space: nowrap; text-decoration: none;
}
.btn-primary {
  background: var(--brand-grad); color: #fff;
  box-shadow: 0 4px 18px -6px rgba(157, 78, 221, 0.6);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.1); color: #fff; }
.btn-ghost {
  background: transparent; border-color: var(--border); color: var(--body);
}
.btn-ghost:hover {
  border-color: var(--purple); color: var(--purple-light);
  background: rgba(157, 78, 221, 0.06); transform: translateY(-1px);
}
.btn-sm { padding: 8px 14px; font-size: 12.5px; }
.btn-lg { padding: 16px 28px; font-size: 15px; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(157,78,221,0.5); }

/* ---------- cards ---------- */
.card {
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: 8px; padding: 20px;
  transition: transform .14s ease, border-color .14s ease;
}
.card:hover { transform: translateY(-1px); border-color: var(--border-focus); }
.card h3 { color: var(--purple-light); font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--secondary); font-size: 13.5px; line-height: 1.6; margin: 0; }
.card.featured {
  border-color: var(--purple); background: var(--surface-feat);
  box-shadow: 0 0 0 1px var(--purple) inset;
}

/* ---------- badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 999px;
  background: var(--surface-2); color: var(--purple-light);
  font-family: var(--font-mono);
}
.badge.ok  { background: #102a18; color: var(--ok); }
.badge.warn{ background: #2a2010; color: var(--warn); }
.badge.err { background: #2a1010; color: var(--err); }
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---------- code blocks ---------- */
.code {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; font-family: var(--font-mono); font-size: 13px;
  line-height: 1.6; color: var(--body); overflow: hidden;
}
.code-head {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--border);
  font-size: 12px; color: var(--dim);
}
.code-head .copy {
  margin-left: auto; background: none; border: 1px solid var(--border);
  color: var(--secondary); font-family: var(--font-mono); font-size: 11.5px;
  padding: 3px 9px; border-radius: 5px; cursor: pointer;
}
.code-head .copy:hover { border-color: var(--purple); color: var(--purple-light); }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; }
.code .c-comment { color: var(--dim); }
.code .c-purple { color: var(--purple-light); }
.code .c-ok { color: var(--ok); }
.code .c-warn { color: var(--warn); }
code.inline {
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px; font-size: 12.5px; color: var(--purple-light);
}

/* ---------- tables ---------- */
.matrix {
  width: 100%; border-collapse: collapse; font-size: 14px;
  border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
}
.matrix th, .matrix td {
  text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--divider);
  vertical-align: middle;
}
.matrix thead th {
  background: var(--surface-1); color: var(--headline); font-size: 13px;
  font-weight: 600;
}
.matrix tbody tr:last-child td { border-bottom: 0; }
.matrix td:first-child, .matrix th:first-child { color: var(--secondary); }
.matrix .yes { color: var(--ok); }
.matrix .no  { color: var(--footer); }
.matrix .feat-col { background: var(--surface-feat); color: var(--body); }
.matrix tbody tr:hover td { background: rgba(157,78,221,0.04); }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--divider); padding: 38px var(--pad-x);
  text-align: center; color: var(--footer); font-size: 12px;
}
.footer .f-links { margin-bottom: 10px; }
.footer .f-links a { color: var(--dim); margin: 0 9px; }
.footer .f-links a:hover { color: var(--purple-light); }
.footer .f-sep { color: var(--footer); }

/* ---------- ambient glow ---------- */
.glow-bg { position: relative; }
.glow-bg::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(620px 420px at 8% -8%, rgba(157,78,221,var(--glow-strength)), transparent 70%),
    radial-gradient(620px 420px at 92% -8%, rgba(90,24,154,var(--glow-strength)), transparent 70%);
}
.glow-bg > * { position: relative; z-index: 1; }

/* ---------- utility ---------- */
.center { text-align: center; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row.center { justify-content: center; }
.muted { color: var(--secondary); }
.dim { color: var(--dim); }
.grid { display: grid; gap: 16px; }
.stack-sm > * + * { margin-top: 8px; }

@media (max-width: 600px) {
  :root { --pad-x: 20px; }
  .h1-hero { font-size: 38px; letter-spacing: -1px; }
  .h1-page { font-size: 30px; }
  .h2-section { font-size: 24px; }
}