:root {
  --bg: #0b0f14;
  --bg-panel: #121821;
  --bg-panel-2: #182231;
  --border: #263244;
  --text: #e8edf4;
  --text-dim: #9fb0c3;
  --accent: #76b900; /* nvidia-ish green */
  --accent-2: #4fd1ff;
  --warn: #ffb454;
  --danger: #ff6b6b;
  --radius: 10px;
  --maxw: 1120px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.brand span { color: var(--accent); }
nav.main a {
  color: var(--text-dim);
  margin-left: 18px;
  font-weight: 600;
  font-size: 0.95rem;
}
nav.main a:hover { color: var(--text); text-decoration: none; }
nav.main { display: flex; flex-wrap: wrap; }
@media (max-width: 720px) {
  nav.main a { margin-left: 0; margin-right: 14px; }
}

main { padding: 36px 0 64px; }

.hero {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}
.hero h1 { font-size: 2.2rem; margin: 0 0 12px; letter-spacing: -0.02em; }
.hero p.lead { color: var(--text-dim); font-size: 1.1rem; max-width: 700px; }
.cta-row { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #0a1200; }
.btn-primary:hover { filter: brightness(1.08); text-decoration: none; }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent-2); text-decoration: none; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin-top: 0; }
.card .cat-tag {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(118,185,0,0.12);
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-weight: 700;
}

.spec-list { list-style: none; margin: 14px 0; padding: 0; }
.spec-list li {
  padding: 8px 0;
  border-top: 1px dashed var(--border);
}
.spec-list li:first-child { border-top: none; }
.spec-key { font-weight: 700; color: var(--text); }
.spec-val { float: right; font-weight: 700; color: var(--accent-2); }
.spec-explain { display: block; color: var(--text-dim); font-size: 0.87rem; margin-top: 3px; clear: both; }

.price-tag { font-size: 1.5rem; font-weight: 800; color: var(--accent); }
.price-note { color: var(--text-dim); font-size: 0.8rem; }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 700;
  margin-left: 6px;
}
.badge-msrp { background: rgba(79,209,255,0.15); color: var(--accent-2); }
.badge-estimate { background: rgba(255,180,84,0.15); color: var(--warn); }

.sources { font-size: 0.78rem; color: var(--text-dim); margin-top: 12px; }
.sources a { color: var(--text-dim); text-decoration: underline; }

section { margin-bottom: 44px; }
h2.section-title { font-size: 1.5rem; margin-bottom: 6px; }
p.section-sub { color: var(--text-dim); margin-top: 0; margin-bottom: 22px; max-width: 760px; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
table.data-table th, table.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 0.92rem;
}
table.data-table th { color: var(--text-dim); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
table.data-table tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; }

.math-box {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-2);
  border-radius: 8px;
  padding: 14px 18px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  margin: 14px 0;
  white-space: pre-wrap;
}

.callout {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 18px 0;
}
.callout.warn { border-left: 3px solid var(--warn); }
.callout.info { border-left: 3px solid var(--accent-2); }

.persona-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.persona-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.persona-card h3 { font-size: 1.3rem; }

.build-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin: 18px 0;
}
.stat-box {
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}
.stat-box .stat-val { font-size: 1.3rem; font-weight: 800; color: var(--accent); display: block; }
.stat-box .stat-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }

form.quote-form { max-width: 520px; }
form.quote-form label { display: block; font-weight: 700; margin: 16px 0 6px; }
form.quote-form input, form.quote-form textarea, form.quote-form select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-panel-2);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}
form.quote-form textarea { min-height: 90px; resize: vertical; }
.field-error { color: var(--danger); font-size: 0.85rem; margin-top: 4px; }
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; }
.flash.error { background: rgba(255,107,107,0.12); border: 1px solid var(--danger); color: var(--danger); }
.flash.success { background: rgba(118,185,0,0.12); border: 1px solid var(--accent); color: var(--accent); }

.confirm-box {
  background: var(--bg-panel);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  max-width: 560px;
}
.confirm-box .req-number { font-size: 2rem; font-weight: 800; color: var(--accent); margin: 12px 0; letter-spacing: 0.03em; }

footer.site {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.nowrap { white-space: nowrap; }
.muted { color: var(--text-dim); }
.tag-row { display:flex; gap:8px; flex-wrap:wrap; margin-bottom: 10px; }