/* template-math.css — precise, geometric, monospace-forward */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Inter:wght@300;400;500;600&display=swap');

:root {
  --bg:       #FAFBFF;
  --surface:  #FFFFFF;
  --text:     #0F172A;
  --muted:    #64748B;
  --border:   #CBD5E1;
  --accent:   #2563EB;
  --accent2:  #7C3AED;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

body {
  background: var(--bg);
  /* subtle dot grid */
  background-image: radial-gradient(circle, #CBD5E1 1px, transparent 1px);
  background-size: 24px 24px;
  background-attachment: fixed;
}

/* ── Override content area to sit on white ───────────────────────── */
.page-wrap {
  background: var(--surface);
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  padding: 3rem 3.5rem;
  margin-top: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

/* ── Header ──────────────────────────────────────────────────────── */
.post-header {
  border-bottom: 2px solid var(--text);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.post-header::before {
  content: 'THEOREM';
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.post-header h1 {
  font-family: var(--font-body);
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* ── Body text ───────────────────────────────────────────────────── */
.post-content {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--text);
}

/* ── Math blocks ─────────────────────────────────────────────────── */
.katex-display {
  background: #F1F5F9;
  border-left: 3px solid var(--accent);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.4em 0;
  overflow-x: auto;
}

/* ── Definition / Theorem / Proof boxes ─────────────────────────── */
.definition, .theorem, .lemma, .proof, .corollary {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.4em 0;
  position: relative;
}

.definition::before { content: 'Definition'; }
.theorem::before    { content: 'Theorem'; }
.lemma::before      { content: 'Lemma'; }
.corollary::before  { content: 'Corollary'; }
.proof::before      { content: 'Proof'; }

.definition::before, .theorem::before, .lemma::before,
.corollary::before, .proof::before {
  position: absolute;
  top: -0.65em;
  left: 1rem;
  background: var(--surface);
  padding: 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.proof::before { color: var(--accent2); }
.theorem { border-color: var(--accent); background: rgba(37,99,235,0.03); }
.proof   { border-color: var(--accent2); }

/* QED tombstone */
.qed {
  display: block;
  text-align: right;
  font-size: 1.1rem;
  color: var(--accent2);
  margin-top: 0.5em;
}
.qed::after { content: '□'; }

/* ── Code ────────────────────────────────────────────────────────── */
.post-content pre {
  background: #0F172A;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .page-wrap { padding: 1.5rem 1.25rem; border-radius: 0; border-left: none; border-right: none; }
}