:root {
  --indigo-50: #eef2ff;
  --indigo-600: #4f46e5;
  --indigo-700: #4338ca;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--slate-900);
  background: #fff;
  line-height: 1.6;
}

a {
  color: var(--indigo-600);
  text-decoration: none;
}

a:hover {
  color: var(--indigo-700);
  text-decoration: underline;
}

nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--slate-100);
}

.nav-inner,
main,
.footer-inner {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-inner {
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 900;
  color: var(--slate-900);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 2rem;
  height: 2rem;
}

.back {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-600);
}

.back:hover {
  color: var(--indigo-600);
}

main {
  padding: 4rem 1.5rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
}

.meta {
  color: var(--slate-500);
  margin: 0 0 2rem;
}

section {
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

p,
li {
  color: var(--slate-600);
}

ul {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  color: var(--slate-800);
}

.card {
  border: 1px solid var(--slate-100);
  background: var(--slate-50);
  border-radius: 1.5rem;
  padding: 2rem;
  margin: 2rem 0;
}

.email {
  font-size: 1.125rem;
  font-weight: 700;
}

footer {
  border-top: 1px solid var(--slate-100);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  color: var(--slate-400);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  font-weight: 600;
  color: var(--slate-500);
}

.footer-links a {
  color: var(--slate-500);
}

.footer-links a:hover {
  color: var(--indigo-600);
}