:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --ink: #111418;
  --muted: #59606B;
  --line: #E2E0D9;
  --link: #1F4FD1;
  --button-bg: #111418;
  --button-ink: #FFFFFF;

  /* RushPacks' own palette, used only inside its product card. */
  --rp-bg: #0A0C10;
  --rp-panel: #141821;
  --rp-line: #232A37;
  --rp-ink: #EEF0F4;
  --rp-muted: #9AA3B2;
  --rp-gold: #E8C170;

  --radius: 14px;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0D11;
    --surface: #12151B;
    --ink: #ECEEF2;
    --muted: #9AA1AD;
    --line: #232832;
    --link: #8FB0FF;
    --button-bg: #ECEEF2;
    --button-ink: #0B0D11;
    --rp-line: #2C3443;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-underline-offset: 3px; }

.wrap {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header { border-bottom: 1px solid var(--line); }

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.mark { width: 28px; height: 28px; }
.mark rect { fill: var(--ink); }
.mark path { fill: var(--bg); }

.nav { display: flex; gap: 24px; }

.nav a {
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
}

.nav a:hover { color: var(--ink); }

/* Hero */
.hero { padding: 104px 0 88px; }

.eyebrow,
.section-label {
  margin: 0 0 20px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 20ch;
  margin: 0;
  text-wrap: balance;
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.lede {
  max-width: 34em;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 21px);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: transform 120ms ease, opacity 120ms ease;
}

.button:hover { transform: translateY(-1px); }

.button.primary {
  background: var(--button-bg);
  border-color: var(--button-bg);
  color: var(--button-ink);
}

.button.gold {
  flex-shrink: 0;
  background: var(--rp-gold);
  border-color: var(--rp-gold);
  color: var(--rp-bg);
}

/* Product */
.product { padding: 24px 0 88px; }

.product-card {
  padding: clamp(24px, 4vw, 44px);
  background: var(--rp-bg);
  border: 1px solid var(--rp-line);
  border-radius: var(--radius);
  color: var(--rp-ink);
}

.product-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.product-head h3 {
  margin: 0;
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.product-url {
  margin: 6px 0 0;
  color: var(--rp-gold);
  font-family: var(--mono);
  font-size: 14px;
}

.product-pitch {
  max-width: 36em;
  margin: 24px 0 0;
  color: var(--rp-muted);
  font-size: 18px;
}

/* 1 column on phones, 2×2 at mid widths, one row of 4 when it fits:
   never 3 + 1 with an orphan on its own row. */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.features li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: var(--rp-panel);
  border-radius: 10px;
}

.features strong { font-weight: 600; }

.features span {
  color: var(--rp-muted);
  font-size: 15px;
  line-height: 1.5;
}

.features a { color: var(--rp-gold); }

@media (min-width: 560px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .features { grid-template-columns: repeat(4, 1fr); }
}

.nowrap { white-space: nowrap; }

/* About + contact */
.about,
.contact { border-top: 1px solid var(--line); }

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding-top: 48px;
  padding-bottom: 48px;
}

.about-grid .section-label { margin: 4px 0 0; }

.about-grid p {
  max-width: 34em;
  margin: 0;
  font-size: 19px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-top: 28px;
  padding-bottom: 40px;
}

@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .nav { gap: 18px; }
  .hero { padding: 64px 0 56px; }
  .actions .button { flex: 1 1 auto; justify-content: center; }
  .product { padding-bottom: 56px; }
  .product-head .button.gold { width: 100%; justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 8px; padding-top: 36px; padding-bottom: 36px; }
  .about-grid p { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
  .button:hover { transform: none; }
}