/* ═══════════════════════════════════════════════════════
   pyvar.css — pyvar.com design system
   Identity: Quant terminal · Deep navy + signal green
   Audience: Quantitative analysts, risk engineers, developers
   Tone: Precise, data-dense, open-source credible
═══════════════════════════════════════════════════════ */

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

:root {
  --bg:    #050810;
  --bg2:   #080d18;
  --bg3:   #0c1220;
  --bg4:   #101828;
  --border: rgba(255,255,255,0.06);
  --border2:rgba(255,255,255,0.10);
  --border3:rgba(255,255,255,0.15);
  --text:  #d4e4f0;
  --text2: #6888a0;
  --dim:   #6888a0; /* WCAG AA fix: was #2a3a4a (~1.5-1.7:1, fails 4.5:1) -- merged into --text2's value, see PR description */
  --green: #00d97e;
  --green2:#00ff96;
  --green3:rgba(0,217,126,0.10);
  --green-line:rgba(0,217,126,0.18);
  --blue:  #2d84ff; /* WCAG AA fix: was #1a6fe8 (~3.8-4.3:1, fails 4.5:1 at the badge's 10px/600 text size) */
  --blue2: rgba(26,111,232,0.10);
  --amber: #e8a020;
  --red:   #ea4444; /* WCAG AA fix: was #e84040 (4.43:1 against --bg4, marginally under 4.5:1) */
  --sans:  'Space Grotesk', system-ui, sans-serif;
  --mono:  'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 15px; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(0,217,126,0.15); }
a { color: inherit; text-decoration: none; }

/* ── Layout ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ── Navigation ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: 56px; display: flex; align-items: center;
  padding: 0 32px; gap: 20px;
  background: rgba(5,8,16,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-mark {
  font-family: var(--mono); font-size: 18px; font-weight: 600;
  color: var(--green); letter-spacing: -.03em;
}
.nav-logo-dot { width: 6px; height: 6px; background: var(--green); border-radius: 50%; animation: blink 2s ease-in-out infinite; flex-shrink: 0; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }
.nav-logo-domain {
  font-family: var(--mono); font-size: 13px; font-weight: 400;
  color: var(--text2); letter-spacing: .01em;
}
.nav-logo-domain span { color: var(--green); }
.nav-links { display: flex; gap: 2px; flex: 1; }
.nav-links a {
  font-family: var(--mono); font-size: 12px; color: var(--text2);
  padding: 5px 12px; border-radius: var(--radius); transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-links a.active { color: var(--green); }
.nav-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.nav-version { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.nav-gh {
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  color: var(--text2); border: 1px solid var(--border2);
  padding: 6px 14px; border-radius: var(--radius); transition: all .15s;
  display: flex; align-items: center; gap: 6px;
}
.nav-gh:hover { border-color: var(--green); color: var(--green); }
.nav-cta {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: .04em; color: var(--bg); background: var(--green);
  padding: 7px 18px; border-radius: var(--radius); transition: background .15s;
}
.nav-cta:hover { background: var(--green2); }
.nav-search-btn {
  font-family: var(--mono); font-size: 11px; color: var(--text2);
  background: transparent; border: 1px solid var(--border2);
  padding: 6px 12px; border-radius: var(--radius); cursor: pointer;
  display: flex; align-items: center; gap: 6px; transition: all .15s;
}
.nav-search-btn:hover { border-color: var(--green); color: var(--green); }
.nav-search-btn kbd {
  font-family: var(--mono); font-size: 10px; color: var(--dim);
  border: 1px solid var(--border); border-radius: 2px; padding: 0 4px;
}

/* ── Search overlay (P8 Task 4) ── */
.search-overlay {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(2,4,8,0.72); backdrop-filter: blur(2px);
  padding: 12vh 20px 20px;
}
.search-overlay.open { display: block; }
.search-panel {
  max-width: 640px; margin: 0 auto; max-height: 70vh;
  background: var(--bg2); border: 1px solid var(--border2); border-radius: 8px;
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.search-input-row {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.search-input {
  flex: 1; background: transparent; border: none; outline: none;
  font-family: var(--mono); font-size: 14px; color: var(--text);
}
.search-input::placeholder { color: var(--dim); }
.search-close {
  font-family: var(--mono); font-size: 10px; color: var(--dim);
  border: 1px solid var(--border); border-radius: 2px; padding: 3px 8px;
  background: transparent; cursor: pointer;
}
.search-close:hover { color: var(--text2); border-color: var(--border2); }
.search-results { overflow-y: auto; padding: 6px; }
.search-empty {
  padding: 24px 18px; text-align: center; font-size: 12px; color: var(--dim);
}
.search-result {
  display: block; padding: 10px 14px; border-radius: 6px;
  border-left: 2px solid var(--rc, var(--border)); text-decoration: none;
  transition: background .1s;
}
.search-result:hover { background: rgba(255,255,255,0.04); }
.search-result-top { display: flex; align-items: baseline; gap: 8px; margin-bottom: 3px; }
.search-result-domain {
  font-family: var(--mono); font-size: 9px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--rc, var(--dim));
}
.search-result-name { font-size: 13px; color: var(--text); font-weight: 500; }
.search-result-summary { font-size: 12px; color: var(--text2); line-height: 1.5; }
@media(max-width:640px){ .nav-search-btn kbd{display:none} }

/* ── Domain function grid filter + "Try it" affordance (P8 Task 5) ── */
/* .fn-card/.fn-name/.fn-desc are defined per-page (domain-*.html's own
   inline <style>) — this is the one new bit shared across all 8 pages. */
.fn-filter-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.fn-filter-input {
  background: var(--bg2); border: 1px solid var(--border2); border-radius: var(--radius);
  padding: 8px 14px; font-family: var(--mono); font-size: 12px; color: var(--text);
  min-width: 220px;
}
.fn-filter-input:focus { outline: none; border-color: var(--svc, var(--green)); }
.fn-count { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.fn-try {
  font-family: var(--mono); font-size: 10px; color: var(--svc, var(--green));
  margin-top: 10px; opacity: 0; transition: opacity .15s;
}
.fn-card:hover .fn-try { opacity: 1; }

/* ── "Try it" panel (P8 Task 5) ── */
.tryit-overlay {
  display: none; position: fixed; inset: 0; z-index: 210;
  background: rgba(2,4,8,0.75); backdrop-filter: blur(2px);
  padding: 8vh 20px 20px; overflow-y: auto;
}
.tryit-overlay.open { display: block; }
.tryit-card {
  max-width: 640px; margin: 0 auto;
  background: var(--bg2); border: 1px solid var(--border2); border-radius: 8px;
  padding: 24px; box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.tryit-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.tryit-domain {
  font-family: var(--mono); font-size: 9px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--rc, var(--green)); margin-bottom: 4px;
}
.tryit-title { font-size: 18px; font-weight: 600; color: var(--text); }
.tryit-close {
  font-family: var(--mono); font-size: 10px; color: var(--dim);
  border: 1px solid var(--border); border-radius: 2px; padding: 3px 8px;
  background: transparent; cursor: pointer; flex-shrink: 0;
}
.tryit-close:hover { color: var(--text2); border-color: var(--border2); }
.tryit-desc { font-size: 12px; color: var(--text2); line-height: 1.6; margin-bottom: 18px; }
.tryit-jwt-row { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.tryit-jwt-input {
  flex: 1; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 12px; font-family: var(--mono); font-size: 11px; color: var(--text);
}
.tryit-jwt-input:focus { outline: none; border-color: var(--rc, var(--green)); }
.tryit-jwt-link { font-family: var(--mono); font-size: 11px; color: var(--green); white-space: nowrap; }
.tryit-form { display: flex; flex-wrap: wrap; gap: 12px 14px; margin-bottom: 16px; }
.tryit-field {
  display: flex; flex-direction: column; gap: 5px; flex: 1 1 160px;
  font-family: var(--mono); font-size: 10px; color: var(--dim);
}
.tryit-field-wide { flex-basis: 100%; }
.tryit-field input, .tryit-field textarea {
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 10px; font-family: var(--mono); font-size: 12px; color: var(--text);
  resize: vertical;
}
.tryit-field input:focus, .tryit-field textarea:focus { outline: none; border-color: var(--rc, var(--green)); }
.tryit-submit { flex-basis: 100%; padding: 10px; text-align: center; }
.tryit-result:empty { display: none; }
.tryit-pending { font-family: var(--mono); font-size: 12px; color: var(--dim); }
.tryit-error { font-family: var(--mono); font-size: 12px; color: var(--red); }
.tryit-error a { color: var(--green); }
.tryit-json {
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; font-family: var(--mono); font-size: 11px; color: var(--green);
  overflow-x: auto; max-height: 320px;
}

/* ── Typography ── */
.label {
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--green);
  display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
}
.label::before { content: '//'; color: var(--dim); }
.h1 {
  font-family: var(--sans);
  font-size: clamp(36px, 4.5vw, 64px);
  font-weight: 600; line-height: 1.1;
  letter-spacing: -.02em; color: var(--text);
}
.h1 em { font-style: normal; color: var(--green); font-weight: 400; }
.h2 {
  font-family: var(--sans);
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 600; line-height: 1.15;
  letter-spacing: -.015em; color: var(--text);
}
.h2 em { font-style: normal; color: var(--green); font-weight: 400; }
.h3 { font-family: var(--sans); font-size: clamp(18px, 2vw, 24px); font-weight: 500; color: var(--text); }
.body-lg { font-size: 16px; font-weight: 300; color: var(--text2); line-height: 1.7; }
.body-md { font-size: 14px; font-weight: 300; color: var(--text2); line-height: 1.65; }
.mono-sm { font-family: var(--mono); font-size: 11px; color: var(--dim); letter-spacing: .04em; }

/* ── Buttons ── */
.btn-green {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: .04em;
  color: var(--bg); background: var(--green);
  padding: 11px 24px; border-radius: var(--radius); transition: background .15s, transform .1s;
}
.btn-green:hover { background: var(--green2); transform: translateY(-1px); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  color: var(--text2); border: 1px solid var(--border2);
  padding: 11px 24px; border-radius: var(--radius); transition: all .15s;
}
.btn-ghost:hover { color: var(--green); border-color: var(--green); transform: translateY(-1px); }

/* ── Sections ── */
.section { padding: 88px 0; }
.section-dark { background: var(--bg2); }
.divider { border: none; border-top: 1px solid var(--border); }

/* ── Page hero ── */
.page-hero {
  padding: 120px 0 64px;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.hero-scanlines {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(0,217,126,0.008) 3px, rgba(0,217,126,0.008) 4px);
  pointer-events: none;
}
.hero-grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,217,126,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,217,126,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 80% at 80% 50%, black 0%, transparent 70%);
}

/* ── Grid ── */
.grid-ruled {
  display: grid; gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ── Code block ── */
.code-block {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  font-family: var(--mono); font-size: 12px;
  color: var(--text2); line-height: 1.85; overflow-x: auto;
}
.code-block .kw { color: var(--green); }
.code-block .str { color: var(--amber); }
.code-block .cm { color: var(--dim); font-style: italic; }
.code-block .num { color: #64b0f0; }
.code-block .fn { color: #90c0f0; }

/* ── Status pill ── */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 2px;
}
.status-green { background: rgba(0,217,126,0.1); color: var(--green); border: 1px solid rgba(0,217,126,0.2); }
.status-green::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--green); animation: blink 2s ease-in-out infinite; }
.status-amber { background: rgba(232,160,32,0.1); color: var(--amber); border: 1px solid rgba(232,160,32,0.2); }
.status-amber::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--amber); animation: blink 2s ease-in-out infinite; }
.status-red { background: rgba(232,64,64,0.1); color: var(--red); border: 1px solid rgba(232,64,64,0.2); }
.status-red::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--red); animation: blink 2s ease-in-out infinite; }

/* ── Reveal ── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .07s; }
.d2 { transition-delay: .14s; }
.d3 { transition-delay: .21s; }

/* ── Footer ── */
.footer {
  background: var(--bg2); border-top: 1px solid var(--border);
  padding: 52px 0 28px;
}
.footer-inner { display: grid; grid-template-columns: 280px 1fr; gap: 80px; margin-bottom: 48px; }
.footer-logo-wrap { margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.footer-tagline { font-size: 13px; color: var(--text2); line-height: 1.6; margin-bottom: 16px; max-width: 240px; }
.footer-meta { font-family: var(--mono); font-size: 11px; color: var(--dim); display: flex; flex-direction: column; gap: 6px; }
.footer-meta a { color: var(--text2); transition: color .15s; }
.footer-meta a:hover { color: var(--green); }
.footer-nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.footer-col-title { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--green); margin-bottom: 16px; }
.footer-col-links { display: flex; flex-direction: column; gap: 9px; }
.footer-col-links a { font-size: 13px; color: var(--text2); transition: color .15s; }
.footer-col-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px;
}
.footer-copy { font-family: var(--mono); font-size: 10px; color: var(--dim); letter-spacing: .04em; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { font-family: var(--mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--dim); transition: color .15s; }
.footer-legal a:hover { color: var(--text2); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
  .footer-nav { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .nav { padding: 0 18px; }
  .nav-links, .nav-version { display: none; }
  .section { padding: 60px 0; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
}