/* ================================================================
   NexRAG — Shared Stylesheet
   Space Grotesk (body/headings) + JetBrains Mono (code)
   Accent: oklch(68% 0.19 270) — indigo-violet
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:ital,wght@0,400;0,500;1,400&display=swap');

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

:root {
  --bg:             #0b0b0b;
  --bg-2:           #111111;
  --bg-3:           #181818;
  --border:         #212121;
  --border-2:       #2e2e2e;
  --text:           #e8e8e8;
  --text-2:         #888888;
  --text-3:         #505050;
  --accent:         oklch(68% 0.19 270);
  --accent-dim:     oklch(68% 0.19 270 / 0.08);
  --accent-border:  oklch(68% 0.19 270 / 0.28);
  --green:          oklch(74% 0.16 145);
  --amber:          oklch(80% 0.14 65);
  --cyan:           oklch(76% 0.11 210);
  --font:           'Space Grotesk', system-ui, sans-serif;
  --mono:           'JetBrains Mono', ui-monospace, monospace;
  --nav-h:          60px;
  --max:            1100px;
  --r:              4px;
}

html {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body { min-height: 100vh; display: flex; flex-direction: column; }
a    { color: inherit; text-decoration: none; }

/* ─── Navigation ──────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 40px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 15px; letter-spacing: -0.01em;
}
.logo-dot { color: var(--accent); font-size: 10px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 14px; color: var(--text-2); transition: color 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-gh {
  font-family: var(--mono); font-size: 12px !important;
  padding: 6px 14px; border: 1px solid var(--border-2);
  border-radius: var(--r); transition: border-color 0.15s !important;
}
.nav-gh:hover { border-color: var(--text-3) !important; color: var(--text) !important; }

/* ─── Container ───────────────────────────────────────────── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 40px; }

/* ─── Buttons ─────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px; background: var(--accent); color: #fff;
  border-radius: var(--r); font-size: 14px; font-weight: 500;
  transition: opacity 0.15s, transform 0.15s; white-space: nowrap;
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px; border: 1px solid var(--border-2);
  border-radius: var(--r); font-size: 14px; color: var(--text-2);
  transition: border-color 0.15s, color 0.15s; white-space: nowrap;
}
.btn-secondary:hover { border-color: var(--text-3); color: var(--text); }

/* ─── Section labels / titles ─────────────────────────────── */
.label {
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.section-title {
  font-size: clamp(26px, 3vw, 36px); font-weight: 600;
  letter-spacing: -0.025em; line-height: 1.15; color: var(--text);
}
.section-sub {
  font-size: 16px; color: var(--text-2); margin-top: 14px;
  line-height: 1.7; max-width: 560px;
}

/* ─── Code blocks ─────────────────────────────────────────── */
pre.code-block {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r); padding: 24px 28px;
  overflow-x: auto; font-family: var(--mono);
  font-size: 13px; line-height: 1.8;
}
pre.code-block code { color: #c8c8c8; }

/* syntax tokens */
.kw      { color: var(--accent); }
.str     { color: var(--green); }
.cmt     { color: var(--text-3); font-style: italic; }
.fn      { color: var(--cyan); }
.num     { color: var(--amber); }
.key     { color: var(--cyan); }
.val     { color: var(--green); }
.yml-cmt { color: var(--text-3); font-style: italic; }

code:not(pre code) {
  font-family: var(--mono); font-size: 0.875em;
  background: var(--bg-3); padding: 2px 7px;
  border-radius: var(--r); color: var(--text);
  border: 1px solid var(--border);
}

/* code window chrome */
.code-window {
  border: 1px solid var(--border); border-radius: var(--r);
  overflow: hidden; background: var(--bg-2);
}
.code-win-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--bg-3);
}
.win-dots { display: flex; gap: 6px; }
.win-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-2);
}
.win-name { font-family: var(--mono); font-size: 12px; color: var(--text-3); }
.code-window pre.code-block { border: none; border-radius: 0; }

/* ─── Install strip ───────────────────────────────────────── */
.install-strip {
  display: flex; align-items: center;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r); overflow: hidden; width: fit-content; max-width: 100%;
}
.install-strip code {
  font-family: var(--mono); font-size: 13px;
  padding: 10px 18px; color: var(--text);
  background: none; border: none; border-radius: 0;
}
.copy-btn {
  padding: 10px 14px; border: 0; border-left: 1px solid var(--border);
  background: transparent; color: var(--text-3);
  font-family: var(--mono); font-size: 11px;
  cursor: pointer; transition: color 0.15s, background 0.15s;
  letter-spacing: 0.05em;
}
.copy-btn:hover { color: var(--text); background: var(--bg-3); }
.copy-btn.copied { color: var(--green); }

/* ─── Badge ───────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; color: var(--accent);
  background: var(--accent-dim); border: 1px solid var(--accent-border);
  padding: 4px 12px; border-radius: 999px;
}
.badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
  animation: bdot 2s ease-in-out infinite;
}
@keyframes bdot { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }

/* ─── Card ────────────────────────────────────────────────── */
.card {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r); padding: 28px 32px;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--border-2); }

/* ─── Fade-in on scroll ───────────────────────────────────── */
.fade-up {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-up.vis { opacity: 1; transform: translateY(0); }

/* ─── Focus ───────────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ─── Footer ──────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); padding: 40px; margin-top: auto; }
.footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.footer-logo { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 13px; color: var(--text-3); transition: color 0.15s; }
.footer-links a:hover { color: var(--text-2); }

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .container, .nav-inner { padding-left: 20px; padding-right: 20px; }
  .footer { padding: 32px 20px; }
}
@media (max-width: 540px) {
  .nav-links a:not(.nav-gh):not(.active) { display: none; }
}

/* ─── Light theme ─────────────────────────────────────────── */
[data-theme="light"] {
  --bg:            #f6f6f6;
  --bg-2:          #efefef;
  --bg-3:          #e5e5e5;
  --border:        #d2d2d2;
  --border-2:      #b8b8b8;
  --text:          #111111;
  --text-2:        #545454;
  --text-3:        #909090;
  --accent:        oklch(50% 0.22 270);
  --accent-dim:    oklch(50% 0.22 270 / 0.08);
  --accent-border: oklch(50% 0.22 270 / 0.25);
  --green:         oklch(43% 0.18 145);
  --amber:         oklch(50% 0.16 65);
  --cyan:          oklch(44% 0.15 210);
}

/* code text — light mode */
[data-theme="light"] pre.code-block code,
[data-theme="light"] pre.doc-code code { color: #2a2a2a; }

/* syntax token overrides — light mode */
[data-theme="light"] .kw      { color: oklch(47% 0.22 270); }
[data-theme="light"] .str     { color: oklch(40% 0.18 145); }
[data-theme="light"] .cmt     { color: #999; }
[data-theme="light"] .fn      { color: oklch(42% 0.16 210); }
[data-theme="light"] .key     { color: oklch(42% 0.16 210); }
[data-theme="light"] .val     { color: oklch(40% 0.18 145); }
[data-theme="light"] .yml-cmt { color: #999; }
[data-theme="light"] .num     { color: oklch(50% 0.16 65); }

/* ─── Theme toggle button ─────────────────────────────────── */
.theme-btn {
  width: 32px; height: 32px;
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  background: transparent;
  color: var(--text-2);
  font-size: 13px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.theme-btn:hover { color: var(--text); border-color: var(--text-3); }

/* ─── Smooth theme transitions ────────────────────────────── */
html, body { transition: background 0.2s, color 0.15s; }
pre.code-block, pre.doc-code, .card, .install-strip,
.code-window, .docs-sidebar, .badge { transition: background 0.2s, border-color 0.15s; }