/* =========================================================
   SGRIDWORKS · theme tokens · light (paper) + dark (terminal)
   ========================================================= */

:root, [data-theme="light"] {
  --bg:        #F4F6F4;
  --bg-2:      #E8ECEA;
  --bg-card:   #FFFFFF;
  --ink:       #0F1618;
  --ink-2:     #2A3A3E;
  --ink-3:     #6B7A7F;
  --rule:      #D8DDD9;
  --rule-2:    #C4CBC6;
  --accent:    #1C4855;
  --accent-2:  #2D6A7A;
  --teal:      #1C4855;
  --teal-2:    #2D6A7A;
  --ok:        #2C6E49;
  --warn:      #B8730F;
  --err:       #A33B20;
  --chart-grid: #DDE1DD;
  --grid-line: #D8DDD9;
  --code-bg:   #E8ECEA;
  --shadow:    0 20px 40px -28px rgba(15,22,24,.18);
  color-scheme: light;
}

[data-theme="dark"] {
  --bg:        #0F1A1D;
  --bg-2:      #16242A;
  --bg-card:   #14222A;
  --ink:       #F1F3EE;
  --ink-2:     #C7CFCA;
  --ink-3:     #8A9492;
  --rule:      #1C2A30;
  --rule-2:    #2A3A42;
  --accent:    #5FCCDB;
  --accent-2:  #8DDEE8;
  --teal:      #5FCCDB;
  --teal-2:    #8DDEE8;
  --ok:        #7AC596;
  --warn:      #E4C174;
  --err:       #E88B75;
  --chart-grid: #1A2830;
  --grid-line: #152028;
  --code-bg:   #16242A;
  --shadow:    0 20px 40px -28px rgba(0,0,0,.6);
  color-scheme: dark;
}

/* reset */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:'ss01','cv11';
  transition:background .28s ease, color .28s ease;
  font-size:16px;
}

/* layout */
.wrap{max-width:1220px;margin:0 auto;padding:0 32px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 32px}

/* type */
h1,h2,h3,h4{font-family:'Fraunces',Georgia,serif;font-weight:700;letter-spacing:-0.018em;color:var(--ink);margin:0}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace;font-feature-settings:'ss01','ss02','zero'}
.eyebrow{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);font-weight:600;
  display:inline-flex;align-items:center;gap:10px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.eyebrow .rule{width:40px;height:1px;background:var(--rule-2)}

a{color:var(--accent);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}

hr{border:0;border-top:1px solid var(--rule);margin:48px 0}

/* ======= NAV ======= */
.topnav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  border-bottom:1px solid var(--rule);
}
.topnav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.logo{
  display:flex;align-items:center;gap:12px;
  font-family:'Fraunces',serif;font-weight:700;font-size:17px;
  color:var(--ink);letter-spacing:-0.01em;
  text-decoration:none;
}
.logo:hover{text-decoration:none}
.logo-mark{
  width:30px;height:30px;display:grid;place-items:center;
  position:relative;flex:0 0 auto;
}
.logo-mark svg{width:100%;height:100%;display:block}
.logo b{font-weight:700;color:var(--ink)}
.logo .sub{
  font-family:'JetBrains Mono',monospace;
  font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);margin-left:4px;
  padding-left:10px;border-left:1px solid var(--rule);
}
.navlinks{
  display:flex;gap:28px;list-style:none;margin:0;padding:0;
}
.navlinks a{
  color:var(--ink-2);text-decoration:none;font-size:14px;font-weight:500;
  padding:6px 0;position:relative;
}
.navlinks a:hover{color:var(--ink)}
.navlinks a.active{color:var(--accent)}
.navlinks a.active::after{
  content:'';position:absolute;left:0;right:0;bottom:-22px;height:2px;background:var(--accent);
}
.nav-right{display:flex;align-items:center;gap:18px}
.themebtn{
  appearance:none;background:transparent;border:1px solid var(--rule-2);
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  cursor:pointer;color:var(--ink-2);transition:all .2s;
}
.themebtn:hover{border-color:var(--accent);color:var(--accent)}
.themebtn svg{width:16px;height:16px}
[data-theme="light"] .themebtn .moon{display:block}
[data-theme="light"] .themebtn .sun{display:none}
[data-theme="dark"]  .themebtn .moon{display:none}
[data-theme="dark"]  .themebtn .sun{display:block}

.navcta{
  font-size:13px;font-weight:600;color:var(--bg);background:var(--ink);
  padding:9px 16px;border-radius:2px;border:1px solid var(--ink);
  display:inline-flex;align-items:center;gap:8px;
  text-decoration:none;
  transition:all .2s;
}
.navcta:hover{background:var(--accent);border-color:var(--accent);color:#fff;text-decoration:none}

/* ======= BUTTONS ======= */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 22px;border-radius:2px;
  font-size:14px;font-weight:600;letter-spacing:-0.005em;
  text-decoration:none;border:1px solid transparent;
  transition:all .2s;cursor:pointer;
  font-family:inherit;
}
.btn.p{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.p:hover{background:var(--accent);border-color:var(--accent);color:#fff;text-decoration:none}
.btn.s{background:transparent;color:var(--ink);border:1px solid var(--rule-2)}
.btn.s:hover{border-color:var(--ink);text-decoration:none}
.btn.ghost{background:transparent;color:var(--accent);padding:13px 0}
.btn.ghost:hover{text-decoration:none;color:var(--accent-2)}

/* ======= PILLS / TAGS ======= */
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  font-family:'JetBrains Mono',monospace;
  font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  font-weight:600;
  border:1px solid var(--rule-2);color:var(--ink-2);
  background:var(--bg-card);
}
.pill.accent{color:var(--accent);border-color:var(--accent)}
.pill.ok{color:var(--ok);border-color:var(--ok)}
.pill.warn{color:var(--warn);border-color:var(--warn)}
.pill .dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.pill.live .dot{animation:pulse 1.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ======= ENGINEERING GRID BG ======= */
.bg-grid{
  position:relative;
}
.bg-grid::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  opacity:.7;
}
.bg-grid > *{position:relative;z-index:1}

/* ======= CARDS ======= */
.card{
  background:var(--bg-card);
  border:1px solid var(--rule);
  padding:24px;
}
.card-dark{
  background:var(--bg-2);
  border:1px solid var(--rule);
  padding:24px;
}

/* ======= SECTION HEADS ======= */
section{padding:88px 0}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:48px;flex-wrap:wrap}
.sec-num{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;color:var(--accent);font-weight:600;letter-spacing:.08em;
  padding-top:10px;flex:0 0 auto;
}
.sec-title{font-size:clamp(32px,4vw,48px);line-height:1.05}
.sec-sub{font-family:'Fraunces',serif;font-size:20px;line-height:1.5;color:var(--ink-2);max-width:62ch;margin:6px 0 0}

/* ======= FOOTER ======= */
.sitefoot{
  border-top:1px solid var(--rule);
  padding:64px 0 48px;
  margin-top:96px;
  background:var(--bg-2);
}
.sitefoot .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.sitefoot h4{
  font-family:'JetBrains Mono',monospace;font-weight:600;
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);
  margin:0 0 16px;
}
.sitefoot ul{list-style:none;margin:0;padding:0}
.sitefoot ul li{margin-bottom:8px}
.sitefoot ul a{color:var(--ink-2);text-decoration:none;font-size:14px}
.sitefoot ul a:hover{color:var(--accent)}
.sitefoot .fabout{max-width:34ch;font-size:14px;color:var(--ink-2);line-height:1.6}
.sitefoot .fabout p{margin:12px 0 0}
.sitefoot .copy{
  grid-column:1 / -1;border-top:1px solid var(--rule);
  padding-top:20px;margin-top:20px;
  display:flex;justify-content:space-between;font-family:'JetBrains Mono',monospace;
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);
}

/* ======= RESPONSIVE ======= */
@media (max-width:900px){
  .navlinks{display:none}
  .sitefoot .wrap{grid-template-columns:1fr 1fr}
}

/* ======= STAGING BANNER (added on redesign-staging branch only) ======= */
.staging-banner {
  position: fixed; bottom: 16px; right: 16px; z-index: 9999;
  background: var(--accent); color: #fff;
  padding: 8px 14px; border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600;
  box-shadow: 0 6px 20px -8px rgba(0,0,0,.4);
  pointer-events: none;
}