:root {
  --bg: #0b0d12;
  --bg-elev: #11141c;
  --bg-card: #161a24;
  --fg: #e6e8ee;
  --fg-muted: #9aa3b2;
  --fg-dim: #6b7383;
  --accent: #82c8ff;
  --accent-strong: #4fa8ee;
  --green: #a0dca0;
  --green-strong: #6cc26c;
  --yellow: #f0d28c;
  --red: #f08282;
  --border: #232938;
  --border-soft: #1a1f2c;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, "Cascadia Mono", "Consolas", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro", "Inter", "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--border-soft);
  background: rgba(11, 13, 18, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--fg);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.brand-mark {
  font-size: 16px;
}

.brand-dot {
  color: var(--fg-dim);
}

.brand-sub {
  color: var(--fg-muted);
  font-weight: 500;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  color: var(--fg-muted);
  font-size: 14px;
}

.nav-cta {
  background: var(--accent);
  color: var(--bg);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--accent-strong);
  text-decoration: none;
  color: var(--bg);
}

/* ===== Hero ===== */
.hero {
  padding: 64px 0 32px;
  border-bottom: 1px solid var(--border-soft);
}

.eyebrow {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.1;
  margin: 0 0 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.lede {
  font-size: 20px;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 0 0 24px;
}

.lede strong {
  color: var(--fg);
  font-weight: 600;
}

.hero-credibility {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--green);
  margin: 0;
}

.hero-credibility li {
  position: relative;
  padding-left: 16px;
}

.hero-credibility li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green-strong);
}

/* ===== Form ===== */
.form-section {
  padding: 32px 0 16px;
}

.benchmark-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.form-row--wide {
  grid-template-columns: 1fr;
}

.form-row--quad {
  grid-template-columns: repeat(4, 1fr);
}

.form-row--pair {
  grid-template-columns: 1fr 2fr;
}

@media (max-width: 720px) {
  .form-row--quad {
    grid-template-columns: repeat(2, 1fr);
  }
  .form-row--pair {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 14px;
  outline: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 168, 238, 0.15);
}

.checkbox-grid {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
  user-select: none;
  margin-bottom: 0;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--fg);
}

.chip input {
  appearance: none;
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  cursor: pointer;
  margin: 0;
}

.chip input:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.chip:has(input:checked) {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Buttons ===== */
.form-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background 120ms ease, transform 80ms ease;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--accent-strong);
  text-decoration: none;
  color: var(--bg);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 120ms ease, color 120ms ease;
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-status {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  flex: 1;
  text-align: right;
}

.form-status.error {
  color: var(--red);
}

.form-status.success {
  color: var(--green);
}

/* ===== Results ===== */
.results-section {
  padding: 32px 0 64px;
}

.results-section h2 {
  font-size: 24px;
  margin: 0 0 12px;
}

.reasoning {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 20px;
  padding: 14px 18px;
  background: var(--bg-elev);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}

.results-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  margin-bottom: 18px;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13px;
}

.results-table th,
.results-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-soft);
}

.results-table th {
  background: var(--bg-elev);
  color: var(--fg-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}

.results-table th.num,
.results-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.results-table tbody tr:last-child td {
  border-bottom: none;
}

.results-table tbody tr.rank-1 {
  background: rgba(108, 194, 108, 0.06);
}

.results-table tbody tr.rank-1 td {
  color: var(--green);
}

.rank-badge {
  display: inline-block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  text-align: center;
  line-height: 22px;
  font-weight: 700;
  font-size: 11px;
  background: var(--bg);
  color: var(--fg-muted);
}

.rank-1 .rank-badge {
  background: var(--green-strong);
  color: var(--bg);
}

.disclaimer {
  color: var(--fg-dim);
  font-size: 12px;
  font-family: var(--font-mono);
  margin-bottom: 32px;
  line-height: 1.6;
}

/* ===== CTA card ===== */
.cta-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elev) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.cta-card h3 {
  font-size: 20px;
  margin: 0 0 12px;
}

.cta-card p {
  color: var(--fg-muted);
  margin: 0 0 18px;
  font-size: 15px;
}

.cta-card strong {
  color: var(--fg);
}

/* ===== How section ===== */
.how-section {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border-soft);
  background: var(--bg-elev);
}

.how-section h2 {
  font-size: 22px;
  margin: 0 0 24px;
}

.how-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.how-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.55;
}

.how-list strong {
  color: var(--fg);
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.how-list em {
  color: var(--green);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 13px;
}

.how-tagline {
  text-align: center;
  margin: 32px 0 0;
  color: var(--fg-muted);
  font-size: 15px;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 32px 0;
  background: var(--bg);
}

.footer-grid {
  display: grid;
  gap: 12px;
  text-align: center;
}

.footer-brand {
  color: var(--fg);
  font-family: var(--font-mono);
  font-weight: 700;
  margin: 0;
}

.footer-meta {
  color: var(--fg-muted);
  font-size: 14px;
  margin: 0;
}

.footer-meta a {
  margin: 0 6px;
}

.footer-note {
  color: var(--fg-dim);
  font-size: 12px;
  max-width: 720px;
  margin: 8px auto 0;
  line-height: 1.6;
}