/* ==========================================================================
   KERVON — design system
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  --bg: #F5F5F1;
  --surface: #FFFFFF;
  --ink: #111111;
  --ink-soft: #696969;
  --border: #D9D9D4;
  --accent: #C9FF3B;
  --accent-ink: #1a1f08;
  --dark: #111111;
  --dark-surface: #191919;
  --dark-border: #2c2c2c;
  --success: #5C8A5C;
  --warning: #B8873A;
  --failure: #B65454;
  --radius: 6px;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --maxw: 1280px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit;cursor:pointer}
code,pre,.mono{font-family:var(--mono)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
@media (max-width:768px){.wrap{padding:0 18px}}

/* ---------- utility ---------- */
.label{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-soft);
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;
}
.label::before{content:"";width:6px;height:6px;background:var(--accent);border:1px solid var(--ink);flex:none}
h1.h-xl{
  font-size:clamp(34px,6vw,72px);
  line-height:1.03;
  font-weight:700;
  letter-spacing:-.02em;
}
h2.h-lg{
  font-size:clamp(26px,4vw,44px);
  line-height:1.08;
  font-weight:700;
  letter-spacing:-.015em;
}
h3.h-md{font-size:20px;font-weight:600;letter-spacing:-.01em}
.lede{font-size:17px;color:var(--ink-soft);line-height:1.6;max-width:640px}
.small{font-size:13px;color:var(--ink-soft)}
.tiny{font-size:11px;color:var(--ink-soft);font-family:var(--mono)}

.border-box{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;
  border:1px solid var(--ink);
  border-radius:4px;
  font-size:13px;font-weight:600;
  background:var(--ink);color:var(--bg);
  transition:background .15s,color .15s,border-color .15s;
}
.btn:hover{background:var(--surface);color:var(--ink)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{border-color:var(--ink);background:var(--ink);color:var(--bg)}
.btn.accent{border-color:var(--ink)}
.btn.accent:hover{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn svg{width:14px;height:14px}

.tag{
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  padding:5px 9px;border:1px solid var(--border);border-radius:4px;
  color:var(--ink-soft);background:var(--surface);
}

.status-dot{width:6px;height:6px;border-radius:50%;display:inline-block;flex:none}
.status-dot.op{background:var(--success);box-shadow:0 0 0 2px rgba(92,138,92,.15)}
.status-dot.exp{background:var(--warning)}
.status-dot.draft{background:var(--ink-soft)}
.status-dot.sim{background:var(--accent);box-shadow:0 0 0 2px rgba(201,255,59,.25)}
.status-dot.fail{background:var(--failure)}
.pulse{animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

.status-row{display:flex;align-items:center;gap:7px;font-family:var(--mono);font-size:11.5px;letter-spacing:.03em;text-transform:uppercase}
.status-row.op{color:var(--success)}
.status-row.exp{color:var(--warning)}
.status-row.draft{color:var(--ink-soft)}
.status-row.sim{color:#7a8f1f}
.status-row.fail{color:var(--failure)}

/* ---------- header ---------- */
header.site{
  position:sticky;top:0;z-index:100;
  background:rgba(245,245,241,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:62px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px;letter-spacing:.01em}
.logo-mark{width:22px;height:22px;flex:none}
.nav-center{display:flex;align-items:center;gap:2px}
.nav-center a{
  font-size:13px;font-weight:500;color:var(--ink-soft);
  padding:8px 14px;border-radius:4px;transition:color .15s,background .15s;
}
.nav-center a:hover{color:var(--ink)}
.nav-center a.active{color:var(--ink);background:var(--surface);border:1px solid var(--border)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-right a.icon{color:var(--ink-soft);display:flex}
.nav-right a.icon:hover{color:var(--ink)}
.nav-status{
  display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;
  color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em;
  padding:6px 10px;border:1px solid var(--border);border-radius:4px;
}
.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:none;padding:6px}
.hamburger span{width:20px;height:1.5px;background:var(--ink)}
.mobile-menu{display:none;flex-direction:column;border-top:1px solid var(--border);background:var(--bg)}
.mobile-menu a{padding:14px 20px;border-bottom:1px solid var(--border);font-size:14px;font-weight:500}
.mobile-menu.open{display:flex}
@media (max-width:920px){
  .nav-center{display:none}
  .hamburger{display:flex}
  .nav-status{display:none}
}

/* ---------- terminal / code windows ---------- */
.term{
  background:var(--dark);
  border:1px solid var(--dark-border);
  border-radius:var(--radius);
  overflow:hidden;
  color:#e8e8e3;
}
.term-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;border-bottom:1px solid var(--dark-border);
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:#8a8a85;text-transform:uppercase;
}
.term-dots{display:flex;gap:6px}
.term-dots span{width:8px;height:8px;border-radius:50%;background:#3a3a3a}
.term-body{padding:16px 18px;font-family:var(--mono);font-size:12.5px;line-height:1.75;overflow-x:auto}
.term-body .k{color:#8fb4ff}
.term-body .s{color:#c9ff3b}
.term-body .c{color:#6b6b66}
.term-body .num{color:#e39b5f}
.term-body .dim{color:#7a7a75}
.term-body .ok{color:#9fd89f}
.term-body .warn{color:#e0b878}
.cursor-blink{display:inline-block;width:7px;height:13px;background:#c9ff3b;vertical-align:-2px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.term.light{background:var(--surface);border:1px solid var(--border);color:var(--ink)}
.term.light .term-head{border-bottom:1px solid var(--border);color:var(--ink-soft)}
.term.light .term-body .c{color:#9a9a92}
.term.light .term-body .k{color:#3060c0}

/* ---------- sections ---------- */
section{padding:96px 0;border-bottom:1px solid var(--border)}
section.tight{padding:64px 0}
section.dark{background:var(--dark);color:#eee;border-bottom:1px solid var(--dark-border)}
section.dark .label,section.dark .tiny{color:#9a9a95}
section.dark .lede{color:#b5b5b0}
@media (max-width:768px){section{padding:60px 0}}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:920px){.grid-2{grid-template-columns:1fr;gap:36px}.grid-3{grid-template-columns:1fr}.grid-4{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.grid-4{grid-template-columns:1fr}}

.card{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
  padding:24px;
}
.card h3{margin-bottom:8px}
.card .num{font-family:var(--mono);font-size:11px;color:var(--ink-soft);margin-bottom:14px}

/* ---------- pipeline diagram nodes ---------- */
.node{
  border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
  padding:14px 18px;font-family:var(--mono);font-size:12.5px;text-align:center;
  display:flex;align-items:center;justify-content:center;gap:8px;
}
.node.active{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.node.accent{border-color:var(--accent);background:#fbffea}
.flow-arrow{display:flex;align-items:center;justify-content:center;color:var(--ink-soft);font-family:var(--mono)}
.flow-col{display:flex;flex-direction:column;align-items:stretch;gap:0}
.flow-row{display:flex;align-items:center;gap:0;flex-wrap:wrap}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:13px;min-width:640px}
th{
  text-align:left;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-soft);padding:12px 16px;border-bottom:1px solid var(--border);background:#fafaf7;
}
td{padding:13px 16px;border-bottom:1px solid var(--border);font-family:var(--mono);font-size:12.5px}
tr:last-child td{border-bottom:none}
tr.hoverable:hover{background:#fafaf6;cursor:pointer}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);margin-bottom:24px}
.tab-btn{
  padding:10px 16px;font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;
  color:var(--ink-soft);border-bottom:2px solid transparent;background:none;border-top:none;border-left:none;border-right:none;
}
.tab-btn.active{color:var(--ink);border-bottom-color:var(--accent)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ---------- footer ---------- */
footer{padding:64px 0 32px;background:var(--bg)}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px}
.footer-top h4{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:16px;text-transform:uppercase}
.footer-top a{display:block;font-size:13.5px;padding:6px 0;color:var(--ink-soft)}
.footer-top a:hover{color:var(--ink)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:28px;border-top:1px solid var(--border);flex-wrap:wrap;gap:14px}
@media (max-width:860px){.footer-top{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:520px){.footer-top{grid-template-columns:1fr}}

/* ---------- misc ---------- */
.divider{height:1px;background:var(--border);width:100%}
.kicker-row{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.metric{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:20px}
.metric .val{font-family:var(--mono);font-size:26px;font-weight:600;letter-spacing:-.01em}
.metric .lbl{font-size:12px;color:var(--ink-soft);margin-top:4px;display:flex;justify-content:space-between;align-items:center}
.badge-demo{font-family:var(--mono);font-size:9.5px;letter-spacing:.05em;color:var(--ink-soft);border:1px solid var(--border);border-radius:3px;padding:2px 5px}

.bar-chart{display:flex;flex-direction:column;gap:10px}
.bar-row{display:grid;grid-template-columns:70px 1fr 46px;gap:10px;align-items:center;font-family:var(--mono);font-size:11.5px}
.bar-track{height:8px;background:#ececE6;border-radius:2px;overflow:hidden;border:1px solid var(--border)}
.bar-fill{height:100%;background:var(--ink)}
.bar-fill.accent{background:var(--accent)}

.accordion-item{border-bottom:1px solid var(--border)}
.accordion-item:last-child{border-bottom:none}
.accordion-head{display:flex;justify-content:space-between;align-items:center;padding:16px 0;background:none;border:none;width:100%;text-align:left;font-family:var(--mono);font-size:13px}
.accordion-body{display:none;padding:0 0 20px;font-size:13px;color:var(--ink-soft)}
.accordion-item.open .accordion-body{display:block}
.accordion-item.open .chevron{transform:rotate(180deg)}
.chevron{transition:transform .15s}

.doc-layout{display:grid;grid-template-columns:240px 1fr;gap:48px}
.doc-side{position:sticky;top:90px;align-self:start;font-size:13px}
.doc-side h5{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:20px 0 8px}
.doc-side h5:first-child{margin-top:0}
.doc-side a{display:block;padding:5px 0;color:var(--ink-soft)}
.doc-side a:hover,.doc-side a.active{color:var(--ink)}
@media (max-width:860px){.doc-layout{grid-template-columns:1fr}.doc-side{position:static}}

.fade-up{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.fade-up.in{opacity:1;transform:translateY(0)}

.path-line{stroke:var(--border);stroke-width:1.5;fill:none}
.path-line.active{stroke:var(--accent);stroke-dasharray:6 4;animation:dash 2s linear infinite}
@keyframes dash{to{stroke-dashoffset:-20}}

::selection{background:var(--accent);color:var(--accent-ink)}