/* Bit Alchemist — public site (bitalchemist.app). Dark-first, gold-on-charcoal
   "alchemist" theme; one shared stylesheet for every page. No external fonts or
   assets, so each page renders fully even offline. */

:root {
  color-scheme: light dark;
  --bg: #fbfaf7;
  --fg: #1d1b16;
  --muted: #6b6658;
  --line: rgba(120,110,90,.22);
  --card: rgba(160,140,90,.08);
  --gold: #b07d12;          /* accent on light */
  --gold-2: #8a5e00;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0b09;
    --fg: #ece7da;
    --muted: #9a9384;
    --line: rgba(220,190,120,.18);
    --card: rgba(220,180,90,.07);
    --gold: #f0c14b;        /* accent on dark */
    --gold-2: #f3cf73;
  }
}

* { box-sizing: border-box; }

body {
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.25rem 3.5rem;
  color: var(--fg);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

a { color: var(--gold-2); }
@media (prefers-color-scheme: dark) { a { color: var(--gold-2); } }

/* ---- nav ---- */
nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 800;
  font-size: 1.12rem;
  letter-spacing: -.01em;
  text-decoration: none;
  color: inherit;
  margin-right: auto;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
}
.brand .glyph {
  font-family: var(--mono);
  font-weight: 700;
  color: #0c0b09;
  background: linear-gradient(145deg, #f3cf73, var(--gold));
  border-radius: 7px;
  padding: .12rem .42rem;
  font-size: .95rem;
}
nav a:not(.brand) {
  text-decoration: none;
  color: var(--muted);
  font-size: .95rem;
}
nav a:not(.brand):hover { color: var(--fg); }

/* ---- hero ---- */
.hero { margin: 2.25rem 0 2rem; }
h1 {
  font-size: 2.3rem;
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: .25rem 0 .85rem;
}
.lede { font-size: 1.18rem; color: var(--muted); margin: 0; }

.cta { display: flex; gap: .75rem; flex-wrap: wrap; margin: 1.6rem 0 .5rem; }
.btn {
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  padding: .62rem 1.3rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  color: var(--fg);
}
.btn.primary {
  background: linear-gradient(145deg, #f3cf73, var(--gold));
  color: #0c0b09;
  border: 0;
}

/* ---- value strip ---- */
.bases {
  font-family: var(--mono);
  font-size: .92rem;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: .9rem 1.1rem;
  margin: 1.75rem 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .35rem 1.1rem;
}
.bases b { color: var(--gold-2); font-weight: 700; }

/* ---- sections ---- */
h2 { font-size: 1.3rem; letter-spacing: -.01em; margin-top: 2.4rem; }
h3 { font-size: 1.05rem; margin-top: 1.6rem; margin-bottom: .35rem; }
p, li { overflow-wrap: break-word; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin: 1.4rem 0;
}
.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.05rem 1.2rem;
}
.feature h3 { margin-top: 0; }
.feature p { margin: 0; color: var(--muted); font-size: .96rem; }

.checks { list-style: none; padding: 0; margin: 1.25rem 0; }
.checks li { padding: .35rem 0 .35rem 1.7rem; position: relative; }
.checks li::before {
  content: "⬡";
  position: absolute;
  left: 0;
  color: var(--gold);
}

code, .mono { font-family: var(--mono); }
.example {
  font-family: var(--mono);
  font-size: .9rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .15rem .45rem;
  white-space: nowrap;
}

.note {
  background: rgba(176,125,18,.12);
  border: 1px solid rgba(176,125,18,.25);
  border-radius: 10px;
  padding: .8rem 1.05rem;
  font-size: .95rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.4rem;
  margin: 1.25rem 0;
}
.card h2, .card h3 { margin-top: 0; }

/* ---- legal pages ---- */
.legal h1 { font-size: 1.8rem; margin-bottom: .25rem; }
.eff { color: var(--muted); font-size: .9rem; margin-top: 0; }
.legal ul { padding-left: 1.25rem; }
.legal li { margin: .3rem 0; }

/* ---- forms ---- */
form { margin-top: 1.5rem; }
label { display: block; font-weight: 600; font-size: .92rem; margin: 1.1rem 0 .35rem; }
input, textarea, select {
  width: 100%;
  font: inherit;
  padding: .62rem .72rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg);
  color: var(--fg);
}
@media (prefers-color-scheme: dark) {
  input, textarea, select { background: #141210; }
}
textarea { min-height: 9rem; resize: vertical; }
button[type=submit] {
  margin-top: 1.3rem;
  font: inherit;
  font-weight: 700;
  padding: .68rem 1.5rem;
  border: 0;
  border-radius: 9px;
  background: linear-gradient(145deg, #f3cf73, var(--gold));
  color: #0c0b09;
  cursor: pointer;
}
.form-note { color: var(--muted); font-size: .85rem; margin-top: .8rem; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---- footer ---- */
footer {
  margin-top: 3rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  align-items: center;
}
footer a { color: inherit; text-decoration: none; }
footer a:hover { color: var(--fg); }
footer .sp { margin-right: auto; }