@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

:root {
  --font-sans: "IBM Plex Sans", system-ui, "Segoe UI", sans-serif;
  --font-serif: "IBM Plex Serif", "Iowan Old Style", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --stone-50: #f2f4f1;
  --stone-100: #e6e9e3;
  --stone-200: #d3d8ce;
  --stone-300: #b3bba9;
  --stone-400: #8b9480;
  --stone-500: #6b7460;
  --stone-600: #545c49;
  --stone-700: #3f4636;
  --stone-800: #2b3025;
  --stone-900: #1c1f18;
  --stone-950: #121410;

  --verdigris-50: #e9f2ee;
  --verdigris-100: #cfe6dc;
  --verdigris-200: #a0cdb9;
  --verdigris-300: #71b497;
  --verdigris-400: #4b9a7c;
  --verdigris-500: #357f63;
  --verdigris-600: #2a6650;
  --verdigris-700: #204d3c;
  --verdigris-800: #17362a;
  --verdigris-900: #0e211a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--stone-950);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--stone-950);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

header.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

header.site-header a.logo img {
  height: 2rem;
  width: auto;
  display: block;
}

header.site-header .back-link {
  color: var(--stone-300);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}

header.site-header .back-link:hover {
  color: #fff;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--stone-50);
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgb(211 216 206 / 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgb(211 216 206 / 0.6) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black, transparent);
  mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, black, transparent);
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--verdigris-200);
  background: var(--verdigris-50);
  color: var(--verdigris-700);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.badge .dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: var(--verdigris-500);
}

h1.hero-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 2.5rem;
  line-height: 1.1;
  letter-spacing: -0.01em;
  max-width: 44rem;
  margin: 0 auto;
}

p.hero-sub {
  margin: 1.5rem auto 0;
  max-width: 40rem;
  color: var(--stone-600);
  font-size: 1.125rem;
  line-height: 1.6;
}

@media (min-width: 640px) {
  h1.hero-title {
    font-size: 3.5rem;
  }
  p.hero-sub {
    font-size: 1.25rem;
  }
}

/* Sections */
section {
  padding: 4rem 0;
}

h2.section-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.875rem;
  text-align: center;
  margin: 0 0 3rem;
}

/* Feature grid */
.features {
  background: var(--stone-50);
}

.feature-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: #fff;
  border: 1px solid var(--stone-200);
  border-radius: 1rem;
  padding: 1.75rem;
}

.feature-card .mark {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background: var(--verdigris-50);
  border: 1px solid var(--verdigris-200);
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.feature-card p {
  color: var(--stone-600);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

/* Contact */
.contact {
  text-align: center;
}

.contact-card {
  max-width: 34rem;
  margin: 0 auto;
  background: var(--verdigris-50);
  border: 1px solid var(--verdigris-200);
  border-radius: 1.25rem;
  padding: 2.5rem 2rem;
}

.contact-card p.lead {
  color: var(--verdigris-800);
  font-size: 1.05rem;
  margin: 0 0 1.75rem;
}

.contact-rows {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.contact-rows a {
  color: var(--verdigris-800);
  font-weight: 600;
  text-decoration: none;
}

.contact-rows a:hover {
  text-decoration: underline;
}

.contact-rows .label {
  color: var(--verdigris-600);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.15rem;
}

/* Footer */
footer.site-footer {
  background: var(--stone-950);
  color: var(--stone-400);
  padding: 2rem 0;
}

footer.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
  font-size: 0.85rem;
}

footer.site-footer a {
  color: var(--stone-300);
  text-decoration: none;
}

footer.site-footer a:hover {
  color: #fff;
}