/* ===== Psy · ZK Civilization OS ===== */
:root{
  --bg: #0a0a0c;
  --bg-2: #16161a;
  --bg-3: #26262a;
  --line: rgba(250,250,250,0.10);
  --line-2: rgba(250,250,250,0.22);
  --ink: #fafafa;
  --ink-soft: #a3a3ab;
  /* Canonical Psy mint accent — names retained for legacy selectors */
  --cyan: #61f5b3;
  --cyan-2: #61f5b3;
  --magenta: #a3a3ab;
  --gold: #a3a3ab;
  --violet: #a3a3ab;
  --teal: #61f5b3;
  --primary: #61f5b3;
  --primary-glow: rgba(97,245,179,0.28);
}
[data-theme="light"]{
  --bg: #ffffff;
  --bg-2: #ffffff;
  --bg-3: #f8f8f8;
  --line: rgba(10,10,12,0.13);
  --line-2: rgba(10,10,12,0.30);
  --ink: #0a0a0c;
  --ink-soft: #4f5260;
  --cyan: #00b87b;
  --cyan-2: #00b87b;
  --magenta: #4f5260;
  --gold: #4f5260;
  --violet: #4f5260;
  --teal: #00b87b;
  --primary: #00b87b;
  --primary-glow: rgba(0,184,123,0.20);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth; scroll-padding-top:72px}
body{
  font-family: "Inter", "Noto Sans SC", system-ui, sans-serif;
  font-size: 17px; line-height: 1.65;
  color: var(--ink); background: var(--bg);
  background-image:
    radial-gradient(1000px 600px at 12% -10%, rgba(97,245,179,0.10), transparent 60%),
    radial-gradient(800px 600px at 110% 25%, rgba(97,245,179,0.06), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(97,245,179,0.04), transparent 60%);
}
[data-theme="light"] body{
  background-image:
    radial-gradient(1000px 600px at 12% -10%, rgba(0,184,123,0.08), transparent 60%),
    radial-gradient(800px 600px at 110% 25%, rgba(0,184,123,0.05), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(0,184,123,0.04), transparent 60%);
}

a{color: var(--ink); text-decoration: underline; text-decoration-color: var(--line-2); text-underline-offset: 3px}
a:hover{text-decoration-color: var(--cyan)}
em{font-style: italic; color: var(--magenta)}

code, .mono{font-family: "JetBrains Mono", ui-monospace, monospace}

/* ===== Bilingual ===== */
[lang="zh"]{display:none}
html[data-lang="zh"] [lang="en"]{display:none}
html[data-lang="zh"] [lang="zh"]{display:initial}
html svg [lang="zh"]{display:none}
html[data-lang="zh"] svg [lang="zh"]{display:inline}
html[data-lang="zh"] svg [lang="en"]{display:none}
html[data-lang="zh"]{ font-family: "Noto Serif SC", "Source Han Serif SC", "Inter", "Noto Sans SC", system-ui, sans-serif; }

/* ===== Topbar ===== */
.topbar{
  position:sticky; top:0; z-index:50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner{
  max-width: 1320px; margin: 0 auto;
  padding: 12px 24px;
  display: flex; align-items: center; gap: 18px;
}
.brand{
  display: flex; align-items: center; gap: 10px;
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-size: 20px; font-weight: 600; letter-spacing: -.005em;
  text-decoration: none; color: var(--ink);
}
.brand .seal{
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--primary);
  box-shadow: 0 0 14px var(--primary-glow);
}
.brand .seal img{
  width: 64%; height: 64%; display: block;
  filter: brightness(0);
}
[data-theme="light"] .brand .seal img{ filter: brightness(0); }
.brand em{color: var(--cyan); font-style: normal; font-weight: 500}
[data-theme="light"] .brand em{color: var(--cyan-2)}
.nav{display:flex; gap:14px; flex-wrap:wrap; margin-left:8px}
.nav a{
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; letter-spacing: .06em;
  text-transform: uppercase; text-decoration: none;
  color: var(--ink-soft);
  padding: 6px 0; border-bottom: 1px solid transparent;
}
.nav a:hover{color: var(--ink); border-bottom-color: var(--cyan)}
.toolbar{margin-left: auto; display: flex; gap: 10px; align-items: center}
.lang-toggle, .theme-toggle{
  display:inline-flex; gap:0;
  border:1px solid var(--line); border-radius: 4px; overflow: hidden;
}
.lang-toggle button, .theme-toggle button{
  font-family: "JetBrains Mono", monospace; font-size: 11px;
  background: transparent; color: var(--ink-soft);
  border: none; border-right: 1px solid var(--line);
  padding: 5px 10px; cursor: pointer; letter-spacing: .04em;
}
.lang-toggle button:last-child, .theme-toggle button:last-child{border-right: none}
.lang-toggle button.active, .theme-toggle button.active{
  background: var(--ink); color: var(--bg);
}

/* ===== Hero ===== */
.hero{ max-width: 1320px; margin: 0 auto; padding: 88px 24px 56px; position: relative; }
.hero-eyebrow{
  font-family: "JetBrains Mono", monospace;
  font-size: 12px; letter-spacing: .18em;
  color: var(--cyan); text-transform: uppercase;
  margin-bottom: 24px;
}
.hero h1{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(40px, 6vw, 78px);
  line-height: 1.05; letter-spacing: -.025em;
  margin: 0 0 20px; max-width: 19ch;
}
.hero h1 em{
  color: var(--magenta);
  font-style: italic;
  background: linear-gradient(120deg, var(--magenta), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-size: 22px; line-height: 1.35;
  color: var(--ink-soft);
  font-weight: 400; max-width: 60ch;
  margin: 0 0 28px;
}
.hero-lede{
  font-size: 19px; line-height: 1.55;
  max-width: 64ch; color: var(--ink-soft);
  margin: 0 0 28px;
}
.hero-thesis{
  display:grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px; margin-top: 40px;
}
.hero-thesis div{
  border: 1px solid var(--line);
  background: linear-gradient(180deg, color-mix(in oklab, var(--bg-2) 85%, transparent), var(--bg-2));
  padding: 18px; border-radius: 6px;
  position: relative; overflow: hidden;
}
.hero-thesis div::before{
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: .55;
}
.hero-thesis strong{
  font-family: "JetBrains Mono", monospace; font-weight: 500;
  font-size: 11px; letter-spacing: .12em;
  color: var(--cyan); text-transform: uppercase;
  display: block; margin-bottom: 8px;
}

/* ===== Section ===== */
section{ max-width: 1320px; margin: 0 auto; padding: 72px 24px; border-top: 1px solid var(--line); }
section.no-rule{border-top: none}
.section-eyebrow{
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; letter-spacing: .18em;
  color: var(--cyan); text-transform: uppercase;
  margin: 0 0 14px;
}
.section-title{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.1; margin: 0 0 16px;
  letter-spacing: -.018em;
}
.section-lede{
  font-size: 18px; line-height: 1.6; color: var(--ink-soft);
  max-width: 72ch; margin: 0 0 32px;
}

/* ===== ZK explainer ===== */
.zk-canvas{
  border: 1px solid var(--line); border-radius: 8px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  overflow: hidden;
}
.zk-canvas svg{display:block; width:100%; height: auto}

/* ===== Cards ===== */
.grid{ display:grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid.two{grid-template-columns: repeat(auto-fit, minmax(380px, 1fr))}
.card{
  border: 1px solid var(--line);
  background: var(--bg-2);
  border-radius: 6px; padding: 22px;
  position: relative; overflow: hidden;
}
.card::before{
  content: ""; position: absolute; top: 0; left: 0; width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--cyan), transparent);
  opacity: .6;
}
.card.magenta::before{background: linear-gradient(180deg, var(--magenta), transparent)}
.card.gold::before{background: linear-gradient(180deg, var(--gold), transparent)}
.card.violet::before{background: linear-gradient(180deg, var(--violet), transparent)}
.card h3{
  font-family: "Cabin Condensed", system-ui, sans-serif; font-weight: 600;
  font-size: 22px; margin: 0 0 8px; line-height: 1.2;
  letter-spacing: -.005em;
}
.card .meta{
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; letter-spacing: .08em;
  color: var(--cyan); text-transform: uppercase;
  margin-bottom: 10px;
}
.card.magenta .meta{color: var(--magenta)}
.card.gold .meta{color: var(--gold)}
.card.violet .meta{color: var(--violet)}
.card p{margin: 0 0 10px; line-height: 1.6}
.card .small{
  font-size: 13px; color: var(--ink-soft);
  font-family: "JetBrains Mono", monospace;
  margin-top: 8px; padding-top: 8px;
  border-top: 1px dashed var(--line);
}

/* ===== Trust timeline ===== */
.trust-stack{
  display: grid; grid-template-columns: 220px 1fr;
  gap: 0;
}
.trust-row{
  display: contents;
}
.trust-row > div{
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
}
.trust-row .trust-meta{
  background: var(--bg-2);
  border-right: 1px solid var(--line);
}
.trust-row .trust-meta .name{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-weight: 600; font-size: 22px;
  margin-bottom: 4px;
  background: linear-gradient(120deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.trust-row .trust-meta .range{
  font-family: "JetBrains Mono", monospace;
  font-size: 12px; color: var(--ink-soft);
}
.trust-row .trust-meta .scale{
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; color: var(--gold);
  margin-top: 6px; letter-spacing: .04em;
}
.trust-row .trust-body{ background: var(--bg); }
.trust-row .trust-body p{margin: 0 0 8px; line-height: 1.55}
.trust-row .trust-body .cost{
  font-style: italic; color: var(--ink-soft);
  border-left: 2px solid var(--magenta); padding-left: 12px;
  margin-top: 8px; font-size: 14px;
}
.trust-row.peak .trust-meta{ background: var(--bg-3); }
.trust-row.peak .trust-meta .name{
  background: linear-gradient(120deg, var(--gold), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== Architecture stack ===== */
.stack-wrap{
  border: 1px solid var(--line); border-radius: 8px;
  overflow: hidden;
}
.stack-row{
  display: grid; grid-template-columns: 220px 60px 1fr;
  gap: 0; border-bottom: 1px solid var(--line);
  padding: 18px 22px; align-items: center;
  background: var(--bg-2);
  transition: background .2s;
}
.stack-row:last-child{border-bottom: none}
.stack-row:hover{background: var(--bg-3)}
.stack-row .layer-name{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-weight: 600; font-size: 17px;
}
.stack-row .layer-bar{
  height: 12px; border-radius: 2px;
}
.stack-row .layer-desc{
  font-size: 14px; color: var(--ink-soft);
  padding-left: 18px; line-height: 1.55;
}

/* ===== Consensus table ===== */
.cons-table{
  width: 100%; border-collapse: collapse;
  border: 1px solid var(--line); border-radius: 6px; overflow: hidden;
  font-size: 14px;
}
.cons-table th, .cons-table td{
  text-align: left; vertical-align: top;
  padding: 14px 16px; border-bottom: 1px solid var(--line);
}
.cons-table th{
  background: var(--bg-3);
  font-family: "JetBrains Mono", monospace; font-weight: 500;
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--cyan);
}
.cons-table td:first-child{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-size: 16px; font-weight: 600;
  color: var(--ink);
}
.cons-table tr.psy td{
  background: linear-gradient(90deg, color-mix(in oklab, var(--magenta) 15%, var(--bg-2)), var(--bg-2));
  border-bottom-color: var(--magenta);
}
.cons-table tr.psy td:first-child{
  background: linear-gradient(120deg, var(--magenta), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== Narratives ===== */
.narratives{ display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.narrative{
  border: 1px solid var(--line);
  background: var(--bg-2);
  border-radius: 6px;
  padding: 22px;
  position: relative; overflow: hidden;
}
.narrative .glyph{
  position: absolute; top: -10px; right: -10px;
  font-family: "Space Grotesk", monospace;
  font-size: 90px; font-weight: 700;
  color: color-mix(in oklab, var(--cyan) 18%, transparent);
  letter-spacing: -.04em; line-height: 1;
}
.narrative h3{
  font-family: "Cabin Condensed", system-ui, sans-serif;
  font-size: 22px; font-weight: 600;
  margin: 0 0 10px; line-height: 1.2;
  letter-spacing: -.005em;
  position: relative;
}
.narrative p{margin: 0 0 12px; line-height: 1.55}
.narrative .pioneer{
  font-family: "JetBrains Mono", monospace;
  font-size: 12px; color: var(--ink-soft);
  border-top: 1px dashed var(--line); padding-top: 10px;
  letter-spacing: .02em;
}

/* ===== Simulator ===== */
.sim{
  display:grid; grid-template-columns: 320px 1fr; gap: 24px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg-2); padding: 24px;
}
.sim-controls .ctrl{margin-bottom: 18px}
.sim-controls label{
  font-family: "JetBrains Mono", monospace;
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft); display:block; margin-bottom: 6px;
}
.sim-controls input[type="range"]{ width: 100%; accent-color: var(--cyan); }
.sim-controls .val{
  font-family: "JetBrains Mono", monospace; font-size: 12px;
  color: var(--cyan); float: right;
}
.sim-output{display:flex; flex-direction: column; gap: 16px;}
.sim-meter{
  display:grid; grid-template-columns: 200px 1fr 60px;
  gap: 12px; align-items: center;
  font-family: "JetBrains Mono", monospace; font-size: 12px;
}
.sim-meter .bar{ height: 8px; background: var(--bg-3); border-radius: 4px; overflow: hidden; }
.sim-meter .bar-fill{
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan), var(--magenta));
  transition: width .25s ease;
}
.sim-meter .num{text-align:right; color: var(--cyan)}
.sim-summary{
  margin-top: 8px; padding: 16px;
  background: var(--bg); border: 1px dashed var(--line); border-radius: 4px;
  font-style: italic; color: var(--ink-soft); font-size: 15px; line-height: 1.55;
}

/* ===== Footer ===== */
footer{
  max-width: 1320px; margin: 0 auto; padding: 48px 24px 64px;
  border-top: 1px solid var(--line);
  font-size: 14px; color: var(--ink-soft);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
footer a{color: var(--ink-soft)}

/* ===== Responsive ===== */
@media (max-width: 900px){
  .nav{display:none}
  .sim{grid-template-columns: 1fr}
  .trust-stack{grid-template-columns: 1fr}
  .trust-row .trust-meta{border-right: none; border-bottom: 1px solid var(--line)}
  .stack-row{grid-template-columns: 1fr; gap: 8px}
  .stack-row .layer-bar{width: 60px}
  .stack-row .layer-desc{padding-left: 0}
}
@media (max-width: 600px){
  .topbar-inner{padding: 10px 16px; gap: 10px}
  .hero{padding: 56px 16px 36px}
  section{padding: 56px 16px}
}