/* =========================
   Nathan Fredman website
   Shared site style
   ========================= */

:root {
  --bg: #f6f7fb;
  --bg-soft: #eef2ff;
  --text: #172033;
  --muted: #64748b;
  --card: #ffffff;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #e2e8f0;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 32rem),
    radial-gradient(circle at top right, rgba(99, 102, 241, 0.10), transparent 28rem),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 34px 22px 70px;
}

/* =========================
   Navigation
   ========================= */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 56px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(12px);
}

.nav-name {
  font-weight: 750;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 550;
  padding: 8px 12px;
  border-radius: 999px;
}

.nav-links a:hover {
  color: var(--accent);
  background: var(--bg-soft);
}

/* =========================
   Typography
   ========================= */

h1, h2, h3 {
  line-height: 1.15;
  letter-spacing: -0.035em;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  margin: 0 0 18px;
}

h2 {
  font-size: 1.65rem;
  margin: 0 0 14px;
}

h3 {
  font-size: 1.2rem;
  margin: 24px 0 8px;
}

p {
  margin: 0 0 16px;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-dark);
}

.subtitle {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  max-width: 780px;
}

/* =========================
   Hero
   ========================= */

.hero {
  margin-bottom: 34px;
  padding: 28px 0 10px;
}

.hero-kicker {
  color: var(--accent);
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  margin-bottom: 14px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* =========================
   Cards and sections
   ========================= */

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

.card {
  grid-column: span 12;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.card.small {
  grid-column: span 6;
}

.card.wide {
  grid-column: span 12;
}

.card p:last-child {
  margin-bottom: 0;
}

.button {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  padding: 11px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: white;
  color: var(--text);
}

.button.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.12);
}

/* =========================
   Images / figures
   ========================= */

figure {
  margin: 24px 0 0;
  text-align: center;
}

img {
  max-width: 100%;
  height: auto;
}

figure img {
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 14px 35px rgba(15, 23, 42, 0.10);
  background: white;
}

figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* =========================
   Lists
   ========================= */

ul {
  padding-left: 1.2rem;
}

li {
  margin-bottom: 8px;
}

/* =========================
   Footer
   ========================= */

footer {
  margin-top: 54px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}

/* =========================
   Mobile
   ========================= */

@media (max-width: 760px) {
  nav {
    align-items: flex-start;
    border-radius: 24px;
    flex-direction: column;
  }

  .nav-links {
    gap: 4px;
  }

  .nav-links a {
    padding: 6px 9px;
  }

  .card,
  .card.small {
    grid-column: span 12;
    padding: 23px;
  }

  .container {
    padding: 20px 16px 50px;
  }
}