:root {
  --accent: #1a6b7c;
  --accent-hover: #145665;
  --ie-gold: #c9a227;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-heading: 'Plus Jakarta Sans', system-ui, sans-serif;
  --bg: #f4f1ea;
  --bg-card: #ffffff;
  --text: #0f2744;
  --text-muted: #5c6470;
  --text-faint: #8b939f;
  --border: rgba(15, 39, 68, 0.1);
}

[data-theme="dark"] {
  --bg: #0a1018;
  --bg-card: #162030;
  --text: #e8edf2;
  --text-muted: #9aa8b8;
  --text-faint: #6b7a8c;
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
h1, h2, h3 {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 1.25rem 1.5rem 4rem; }
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0 2rem;
}
.logo { height: 40px; width: auto; }
.logo-light { display: block; }
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }

.nav { display: flex; gap: 1rem; align-items: center; font-size: 0.875rem; font-weight: 600; }
.nav a { color: var(--text-muted); }
.nav a:hover { color: var(--text); }

.banner {
  background: color-mix(in srgb, var(--ie-gold) 18%, transparent);
  border: 1px solid var(--ie-gold);
  color: var(--text);
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
}
.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0.4rem 0 0.75rem; }
.lede { color: var(--text-muted); max-width: 62ch; font-size: 1.05rem; }

.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.tier {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}
.tier.featured { border-color: var(--accent); }
.tier h2 { font-size: 1.15rem; margin: 0 0 0.25rem; }
.price { font-size: 1.7rem; font-weight: 700; margin: 0.35rem 0 0.9rem; }
.price small { font-size: 0.8rem; font-weight: 500; color: var(--text-muted); }
.tier ul { padding-left: 1.1rem; color: var(--text-muted); font-size: 0.92rem; flex: 1; margin: 0 0 1rem; }
.tier li { margin: 0.35rem 0; }

form.buy { display: flex; flex-direction: column; gap: 0.5rem; }
input {
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--text);
}
.btn, button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 0.95rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover, button:hover { background: var(--accent-hover); }

.note, .fine {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.contents { margin-top: 3rem; }
.contents h2 { font-size: 1.35rem; }
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.card p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.simple { min-height: 70vh; display: flex; align-items: center; justify-content: center; }
.simple .panel { max-width: 36rem; padding: 2rem; }
.theme-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
}

@media (max-width: 900px) {
  .tiers, .grid-2 { grid-template-columns: 1fr; }
}