:root{
  --paper: #f4f2ee;           /* less bright */
  --ink: #111214;
  --muted: rgba(17,18,20,0.72);
  --hair: rgba(17,18,20,0.10);
  --hair2: rgba(17,18,20,0.16);
  --card: rgba(255,255,255,0.72);
  --link: #111214;
}

@media (prefers-color-scheme: dark){
  :root{
    --paper: #0f1114;
    --ink: rgba(255,255,255,0.92);
    --muted: rgba(255,255,255,0.72);
    --hair: rgba(255,255,255,0.10);
    --hair2: rgba(255,255,255,0.16);
    --card: rgba(255,255,255,0.06);
    --link: rgba(255,255,255,0.92);
  }
}

*{ box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.45;
}

a{ color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover{ text-decoration-thickness: 2px; }

.container{
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border-bottom: 1px solid var(--hair);
}
.topbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand-mark{
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid var(--hair2);
  background: rgba(17,18,20,0.03);
}

.nav{
  display:flex;
  align-items:center;
  gap: 14px;
  flex-wrap: wrap;
}
.nav a{
  text-decoration: none;
  padding: 6px 8px;
  border-radius: 10px;
}
.nav a:hover{
  background: rgba(17,18,20,0.05);
}

.hero{ padding: 54px 0 28px 0; }
.kicker{
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.h1{
  margin: 12px 0 0 0;
  font-size: clamp(30px, 4.4vw, 54px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 950;
}
.lede{
  margin: 14px 0 0 0;
  max-width: 66ch;
  font-size: 16px;
  color: var(--muted);
}

.actions{ margin-top: 18px; display:flex; gap: 10px; flex-wrap: wrap; }

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--hair2);
  background: rgba(17,18,20,0.02);
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
}
.btn:hover{ background: rgba(17,18,20,0.05); }
.btn-primary{
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  color: var(--paper);
  border-color: color-mix(in srgb, var(--ink) 92%, transparent);
}
.btn-primary:hover{ background: color-mix(in srgb, var(--ink) 86%, transparent); }

.grid{ display:grid; grid-template-columns: 1fr; gap: 12px; margin: 22px 0 0 0; }
@media (min-width: 900px){ .grid{ grid-template-columns: 1fr 1fr; } }

.card{
  border: 1px solid var(--hair);
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
}
.card h2{ margin: 0 0 8px 0; font-size: 16px; letter-spacing: -0.02em; }
.card p, .card li{ color: var(--muted); }
.card ul{ margin: 10px 0 0 0; padding-left: 18px; }

.hr{ margin: 26px 0; border: none; border-top: 1px solid var(--hair); }

.footer{ padding: 18px 0 40px 0; color: var(--muted); font-size: 13px; }
.footer a{ color: var(--muted); }

.mono{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace; }

/* WATERMARK: darker + more readable */
.wm{
  position: fixed;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  width: clamp(760px, 110vw, 1500px);
  height: clamp(760px, 110vw, 1500px);
  background-image: url("/assets/watermark-seal.svg");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  opacity: 0.15;
  filter: contrast(1.25) blur(0.2px);
  pointer-events: none;
  z-index: 0;
}
.page{ position: relative; z-index: 1; }

.callout{
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px dashed var(--hair2);
  background: color-mix(in srgb, var(--card) 70%, transparent);
  color: var(--muted);
}

.small{ font-size: 13px; color: var(--muted); }