/* ── Reset ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Sora', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }

/* ── Tokens ─────────────────────────────── */
:root {
  --bg:                 #F7FAFB;
  --surface:            #EDF3F6;
  --surface-2:          #E2ECF0;
  --border:             rgba(12,26,36,0.1);
  --border-lime:        rgba(60,140,0,0.2);
  --ink:                #0C1A24;
  --ink-muted:          #5F6870;
  --ink-subtle:         #7F8A92;
  --ink-on-dark:        #F0F7FB;
  --ink-on-dark-muted:  rgba(240,247,251,0.8);
  --ink-on-dark-subtle: rgba(240,247,251,0.65);
  --lime:               #ADEC5B;
  --lime-text:          #3A8A00;
  --coral:              #EB6C63;
  --dark:               #0C232D;
  --maxw:               1200px;
  --pad:                clamp(20px, 4vw, 60px);
  --reading-maxw:       720px;
}

/* ── Layout ─────────────────────────────── */
.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section-inner { max-width: 820px; margin-inline: auto; }

/* ── Mono label ─────────────────────────── */
.mono-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--coral);
  display: block;
  margin-bottom: 10px;
}
.mono-label::before { content: '// '; opacity: 0.45; }

.mono-label-muted {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

.mono-label-sm {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Sora', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 13px 26px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  letter-spacing: 0.01em;
}
.btn.primary {
  background: var(--lime);
  color: #0C1A24;
  border-color: var(--lime);
}
.btn.primary:hover {
  background: #BEF570;
  border-color: #BEF570;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(173,236,91,0.35);
}
.btn.ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--ink);
}
.btn.ghost:hover {
  border-color: var(--coral);
  color: var(--coral);
  transform: translateY(-1px);
}

/* ── Footer ─────────────────────────────── */
footer {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-block: 24px;
}
footer small {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: rgba(240,247,251,0.58);
  letter-spacing: 0.03em;
}

/* ── Scroll reveal ──────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1),
              transform 0.7s cubic-bezier(0.16,1,0.3,1);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }