/* Kinase Foundation Model — shared styling.
   One stylesheet for the whole site so the front page and the tool read as one
   thing. Dark-on-light, generous measure, no framework. */

:root {
  --ink: #17181c;
  --ink-soft: #5b6068;
  --line: #e3e6ea;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --green: #0a7d33;
  --amber: #9a6700;
  --amber-bg: #fff8e5;
  --red: #b3261e;
  --red-bg: #fdf0ef;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* ---- masthead ---- */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 50;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 16px; flex-wrap: wrap;
}
.brand { font-weight: 650; font-size: 1.02rem; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); }
.brand span { color: var(--accent); }
nav.site a {
  color: var(--ink-soft); text-decoration: none; margin-left: 20px; font-size: 0.94rem;
}
nav.site a:hover, nav.site a.on { color: var(--accent); }

/* ---- hero ---- */
.hero { padding: 56px 0 34px; }
.hero h1 {
  font-size: 2.3rem; line-height: 1.15; letter-spacing: -0.022em; margin: 0 0 16px;
}
.hero p.lede { font-size: 1.14rem; color: var(--ink-soft); margin: 0 0 26px; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 550;
  border: 1px solid var(--accent); font-size: 0.97rem;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); }

/* ---- cards / stats ---- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(178px, 1fr)); gap: 14px; margin: 34px 0; }
.stat { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat b { display: block; font-size: 1.6rem; letter-spacing: -0.02em; }
.stat span { color: var(--ink-soft); font-size: 0.87rem; }

section { padding: 12px 0 30px; }
section h2 { font-size: 1.3rem; letter-spacing: -0.012em; margin: 30px 0 12px; }
section h3 { font-size: 1.05rem; margin: 22px 0 8px; }

.note {
  border-left: 3px solid var(--line); background: var(--bg-soft);
  padding: 14px 18px; border-radius: 0 var(--radius) var(--radius) 0; margin: 18px 0;
}
.note.warn { border-left-color: #d4a72c; background: var(--amber-bg); }
.note.warn b { color: var(--amber); }
.note.stop { border-left-color: var(--red); background: var(--red-bg); }
.note.stop b { color: var(--red); }

table { border-collapse: collapse; width: 100%; font-size: 0.92rem; margin: 14px 0; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); }
th { background: var(--bg-soft); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

code { background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
a { color: var(--accent); }
.muted { color: var(--ink-soft); font-size: 0.9rem; }

footer.site { border-top: 1px solid var(--line); margin-top: 50px; padding: 26px 0 46px; color: var(--ink-soft); font-size: 0.88rem; }

/* ---- tool ---- */
.panel { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin: 16px 0; }
.panel > h3 { margin-top: 0; }
.row { display: grid; gap: 16px; }
@media (min-width: 860px) { .row.two { grid-template-columns: 1fr 1fr; } }

label.fld { display: block; font-weight: 550; font-size: 0.9rem; margin: 0 0 6px; }
select, textarea, input[type=text] {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; font-size: 0.93rem; background: #fff; color: var(--ink);
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.86rem; }
select[multiple] { height: 190px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip { background: var(--accent-soft); color: var(--accent); border-radius: 999px; padding: 3px 10px; font-size: 0.82rem; }

.ketcher-box { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg-soft); }
.ketcher-box iframe { width: 100%; height: 420px; border: 0; display: block; }

.smiles-out {
  margin-top: 8px; font-family: ui-monospace, Menlo, monospace; font-size: 0.82rem;
  color: var(--ink-soft); word-break: break-all; min-height: 1.4em;
}

.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--accent-soft);
  border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

.winner { font-weight: 650; color: var(--green); }