/* skpqc.skworld.io — sk_pqc landing page. No build step; static. */
:root {
  --bg: #07071a;
  --bg-soft: #0e0e26;
  --card: #11112c;
  --card-border: #22224a;
  --text: #e7e7f0;
  --muted: #9a9ab8;
  --accent: #ffa500;
  --accent-2: #22d3ee;
  --accent-3: #ff6b35;
  --warn-bg: #2a1d05;
  --warn-border: #b4730a;
  --warn-text: #ffce80;
  --code-bg: #0a0a1e;
  --good: #34d399;
  --no: #f87171;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafaf8;
    --bg-soft: #f2f2ee;
    --card: #ffffff;
    --card-border: #e2e2dc;
    --text: #1a1a1a;
    --muted: #5a5a5a;
    --accent: #b45309;
    --accent-2: #0e7490;
    --accent-3: #c2410c;
    --warn-bg: #fef3c7;
    --warn-border: #d97706;
    --warn-text: #7c4a03;
    --code-bg: #f4f4f0;
    --good: #059669;
    --no: #dc2626;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'DejaVu Sans', sans-serif;
  background:
    radial-gradient(60% 50% at 15% 0%, rgba(255,165,0,0.10), transparent 60%),
    radial-gradient(55% 45% at 90% 10%, rgba(34,211,238,0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre { font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, 'DejaVu Sans Mono', monospace; }

/* nav */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.brand { font-weight: 800; font-size: 1.2rem; letter-spacing: -0.01em; }
.brand .glyph { color: var(--accent); }
.topbar nav { display: flex; gap: 1.1rem; flex-wrap: wrap; font-size: 0.92rem; }
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--text); }

/* hero */
.hero { text-align: center; padding: 1.5rem 0 1rem; }
.eyebrow {
  display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent-2); border: 1px solid var(--card-border);
  border-radius: 999px; padding: 0.3rem 0.9rem; margin-bottom: 1.3rem;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.08; font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(100deg, var(--accent), var(--accent-3) 45%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}
.hero .sub { font-size: clamp(1.05rem, 2.6vw, 1.3rem); color: var(--muted); max-width: 720px; margin: 0 auto 1.5rem; }
.hero .sub strong { color: var(--text); font-weight: 600; }

/* experimental banner */
.banner {
  background: var(--warn-bg); border: 1px solid var(--warn-border); color: var(--warn-text);
  border-radius: 12px; padding: 0.9rem 1.1rem; margin: 1.5rem 0 2.5rem; font-size: 0.96rem; line-height: 1.55;
  display: flex; gap: 0.75rem; align-items: flex-start;
}
.banner .ico { font-size: 1.2rem; line-height: 1.4; flex: 0 0 auto; }
.banner strong { color: var(--warn-text); }

/* install hat-trick */
.installs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 2rem 0; }
@media (max-width: 720px) { .installs { grid-template-columns: 1fr; } }
.icard {
  background: var(--card); border: 1px solid var(--card-border); border-radius: 14px;
  padding: 1.2rem 1.2rem 1.1rem; display: flex; flex-direction: column; gap: 0.55rem;
}
.icard .lang { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); font-family: 'JetBrains Mono', monospace; }
.icard .cmd {
  background: var(--code-bg); border: 1px solid var(--card-border); border-radius: 8px;
  padding: 0.7rem 0.85rem; font-size: 0.95rem; font-weight: 600; color: var(--accent);
  overflow-x: auto; white-space: nowrap;
}
.icard .cmd::before { content: "$ "; color: var(--muted); }
.icard .links { font-size: 0.85rem; color: var(--muted); margin-top: auto; display: flex; gap: 0.8rem; flex-wrap: wrap; }
.icard .registry { color: var(--accent-2); }

.import-note {
  text-align: center; color: var(--muted); font-size: 0.92rem; margin: -0.5rem 0 2rem;
}
.import-note code { background: var(--code-bg); padding: 0.1rem 0.4rem; border-radius: 4px; color: var(--text); }

/* sections */
section { margin: 3rem 0; }
section h2 { font-size: clamp(1.4rem, 3.5vw, 1.9rem); font-weight: 800; letter-spacing: -0.01em; margin-bottom: 0.5rem; }
section h2 .tick { color: var(--accent); }
section > p.lead { color: var(--muted); margin-bottom: 1.4rem; max-width: 760px; }

/* interop diagram */
.interop {
  display: flex; align-items: center; justify-content: center; gap: 0.6rem; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 1.4rem; margin: 1.2rem 0;
}
.interop .node {
  font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 0.95rem;
  background: var(--code-bg); border: 1px solid var(--card-border); border-radius: 10px; padding: 0.6rem 1rem;
}
.interop .arrow { color: var(--accent-2); font-size: 1.3rem; }
.interop .wire {
  flex-basis: 100%; text-align: center; color: var(--muted); font-size: 0.88rem; margin-top: 0.6rem;
  font-family: 'JetBrains Mono', monospace;
}

/* is / isn't grid */
.claims { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
@media (max-width: 640px) { .claims { grid-template-columns: 1fr; } }
.claim { background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 1.2rem 1.3rem; }
.claim h3 { font-size: 1.05rem; margin-bottom: 0.8rem; }
.claim ul { list-style: none; display: flex; flex-direction: column; gap: 0.55rem; }
.claim li { padding-left: 1.7rem; position: relative; font-size: 0.95rem; }
.claim.is li::before { content: "✓"; position: absolute; left: 0; color: var(--good); font-weight: 800; }
.claim.isnt li::before { content: "✕"; position: absolute; left: 0; color: var(--no); font-weight: 800; }
.claim code { background: var(--code-bg); padding: 0.08rem 0.35rem; border-radius: 4px; font-size: 0.9em; }

/* code block */
pre.code {
  background: var(--code-bg); border: 1px solid var(--card-border); border-radius: 12px;
  padding: 1.2rem 1.3rem; overflow-x: auto; font-size: 0.88rem; line-height: 1.6; margin: 1.2rem 0;
}
pre.code .c { color: var(--muted); }
pre.code .k { color: var(--accent); }
pre.code .s { color: var(--accent-2); }

/* interop matrix table */
.matrix-wrap { overflow-x: auto; margin: 1.2rem 0; border: 1px solid var(--card-border); border-radius: 14px; background: var(--card); }
table.matrix { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
table.matrix th, table.matrix td { padding: 0.7rem 0.9rem; text-align: left; border-bottom: 1px solid var(--card-border); }
table.matrix thead th { font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); white-space: nowrap; }
table.matrix tbody tr:last-child td { border-bottom: none; }
table.matrix td.cap { font-weight: 600; }
table.matrix td.cap small { display: block; font-weight: 400; color: var(--muted); font-size: 0.82rem; }
table.matrix td.mark { text-align: center; font-family: 'JetBrains Mono', monospace; font-weight: 700; white-space: nowrap; }
table.matrix .yes { color: var(--good); }
table.matrix .soon { color: var(--accent); }
table.matrix .no { color: var(--muted); }
.legend { font-size: 0.85rem; color: var(--muted); margin-top: 0.4rem; display: flex; gap: 1.2rem; flex-wrap: wrap; }
.legend b.yes { color: var(--good); } .legend b.soon { color: var(--accent); }

/* benchmark table */
.bench {
  background: var(--code-bg); border: 1px solid var(--card-border); border-radius: 12px;
  overflow-x: auto; margin: 1.2rem 0;
}
.bench table { width: 100%; border-collapse: collapse; font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; }
.bench th, .bench td { padding: 0.6rem 1rem; text-align: right; }
.bench th:first-child, .bench td:first-child { text-align: left; }
.bench thead th { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; border-bottom: 1px solid var(--card-border); }
.bench td.op { color: var(--accent); font-weight: 700; }
.bench .big { font-weight: 800; color: var(--text); }
.bench caption { caption-side: top; text-align: left; color: var(--muted); font-size: 0.82rem; padding: 0.7rem 1rem 0.2rem; font-family: 'Inter', sans-serif; }

/* pipeline (single core → bindings) */
.pipeline {
  display: flex; align-items: stretch; justify-content: center; gap: 0.7rem; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 1.4rem; margin: 1.2rem 0;
}
.pipeline .core, .pipeline .binding {
  font-family: 'JetBrains Mono', monospace; border-radius: 10px; padding: 0.7rem 1rem; font-size: 0.9rem;
  display: flex; flex-direction: column; gap: 0.25rem; min-width: 150px;
}
.pipeline .core { background: var(--code-bg); border: 1px solid var(--accent); font-weight: 700; justify-content: center; text-align: center; }
.pipeline .fan { display: flex; flex-direction: column; gap: 0.6rem; }
.pipeline .binding { background: var(--code-bg); border: 1px solid var(--card-border); }
.pipeline .binding b { font-weight: 700; }
.pipeline .binding .st { font-size: 0.78rem; }
.pipeline .binding .st.ok { color: var(--good); }
.pipeline .binding .st.wip { color: var(--accent); }
.pipeline .pipe-arrow { color: var(--accent-2); font-size: 1.6rem; align-self: center; }

/* facts row */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin: 1.5rem 0; }
@media (max-width: 720px) { .facts { grid-template-columns: 1fr 1fr; } }
.fact { background: var(--card); border: 1px solid var(--card-border); border-radius: 12px; padding: 1rem; text-align: center; }
.fact .n { font-family: 'JetBrains Mono', monospace; font-size: 1.35rem; font-weight: 800; color: var(--accent); }
.fact .l { font-size: 0.8rem; color: var(--muted); margin-top: 0.25rem; }

/* repos / links cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
@media (max-width: 720px) { .cards { grid-template-columns: 1fr; } }
.lcard { background: var(--card); border: 1px solid var(--card-border); border-radius: 14px; padding: 1.1rem 1.2rem; }
.lcard h3 { font-size: 1rem; margin-bottom: 0.3rem; }
.lcard p { font-size: 0.9rem; color: var(--muted); }

/* footer */
footer { border-top: 1px solid var(--card-border); margin-top: 3.5rem; padding-top: 1.5rem; color: var(--muted); font-size: 0.9rem; text-align: center; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }
footer .small { font-size: 0.82rem; margin-top: 0.6rem; }