:root {
  --bg: #0b0f0d;
  --bg-elevated: #121815;
  --bg-card: #161d19;
  --border: #26302b;
  --text: #eef2ef;
  --text-dim: #9aa79f;
  --text-faint: #6b7871;
  --accent: #22c55e;
  --accent-dim: #17803f;
  --accent-soft: rgba(34, 197, 94, 0.12);
  --accent2: #818cf8;
  --accent2-dim: #4f46e5;
  --accent2-soft: rgba(129, 140, 248, 0.12);
  --amber: #f59e0b;
  --radius: 10px;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --max-w: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header.site {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 15, 13, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
header.site .bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: var(--max-w); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
nav.site-nav { display: flex; gap: 28px; align-items: center; }
nav.site-nav a { color: var(--text-dim); font-size: 0.92rem; font-weight: 500; }
nav.site-nav a:hover { color: var(--text); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #06210f; font-weight: 700;
  padding: 10px 18px; border-radius: 999px; font-size: 0.92rem;
  border: none; cursor: pointer; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px var(--accent-soft); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }

/* ---------- hero ---------- */
.hero { padding: 96px 0 64px; text-align: center; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px;
  font-size: 0.8rem; color: var(--text-dim); margin-bottom: 28px;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); flex: none; }
.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.15; margin: 0 0 20px;
  letter-spacing: -0.01em;
}
.hero h1 em { color: var(--accent); font-style: normal; }
.hero h1 em.violet { color: var(--accent2); }
.hero p.sub { font-size: 1.15rem; color: var(--text-dim); max-width: 620px; margin: 0 auto 36px; }
.hero .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- sections ---------- */
section { padding: 72px 0; border-top: 1px solid var(--border); }
section .kicker { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); font-weight: 700; margin-bottom: 10px; }
section .kicker.alt { color: var(--accent2); }
section h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0 0 16px; letter-spacing: -0.01em; }
section p.lead { color: var(--text-dim); max-width: 680px; font-size: 1.05rem; margin-bottom: 40px; }

/* value grid */
.value-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px;
}
.value-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px;
}
.value-card .icon { display: block; margin-bottom: 12px; width: 26px; height: 26px; }
.value-card .icon svg { width: 100%; height: 100%; fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.value-card h3 { font-size: 1rem; margin: 0 0 6px; font-family: var(--font-display); }
.value-card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; }

/* preview table */
.preview-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-card); }
table.preview { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 640px; }
table.preview th, table.preview td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.preview th { color: var(--text-faint); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }
table.preview tr:last-child td { border-bottom: none; }
table.preview td.grade { font-weight: 700; }
.grade-A, .grade-Ap { color: var(--accent); }
.grade-Bp, .grade-B { color: #86efac; }
.grade-Cp, .grade-C { color: var(--amber); }
.grade-D { color: #f87171; }
.grade-E { color: #dc2626; }
.preview-note { margin-top: 14px; font-size: 0.85rem; color: var(--text-faint); }

.terms-explain { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-top: 28px; }
.terms-explain div h4 { font-family: var(--font-display); margin: 0 0 6px; font-size: 0.95rem; color: var(--accent); }
.terms-explain div p { margin: 0; color: var(--text-dim); font-size: 0.88rem; }

/* how it works */
.steps { counter-reset: step; display: grid; gap: 18px; max-width: 640px; }
.step { display: flex; gap: 16px; align-items: flex-start; }
.step .num {
  flex: none; width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent2-soft); color: var(--accent2); font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
}
.step p { margin: 0; color: var(--text-dim); }
.step strong { color: var(--text); }

/* CTA block */
.cta-block {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 48px; text-align: center;
}
.cta-block h2 { margin-bottom: 10px; }
.cta-block p { color: var(--text-dim); margin-bottom: 28px; }

/* footer */
footer.site { border-top: 1px solid var(--border); padding: 40px 0; }
footer.site .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
footer.site .disclaimer { color: var(--text-faint); font-size: 0.82rem; max-width: 640px; }
footer.site .links { display: flex; gap: 20px; font-size: 0.85rem; }
footer.site .links a { color: var(--text-dim); }

/* conditions page */
.doc { padding: 64px 0 96px; }
.doc h1 { font-family: var(--font-display); font-size: 2rem; margin-bottom: 4px; }
.doc .meta { color: var(--text-faint); font-size: 0.85rem; margin-bottom: 36px; }
.doc .callout {
  background: var(--accent-soft); border: 1px solid var(--accent-dim); border-radius: var(--radius);
  padding: 18px 20px; margin: 28px 0; font-size: 0.95rem;
}
.doc h2 { font-family: var(--font-display); font-size: 1.2rem; margin-top: 40px; }
.doc ul { color: var(--text-dim); }
.doc li { margin-bottom: 8px; }
.doc p { color: var(--text-dim); }

@media (max-width: 640px) {
  nav.site-nav { display: none; }
  .hero { padding: 64px 0 48px; }
  section { padding: 52px 0; }
  .cta-block { padding: 32px 20px; }
}