:root {
  --background: #f4f1e8;
  --surface: #ffffff;
  --text: #1e1e1e;
  --muted: #5c5c5c;
  --accent: #6f4c1e;
  --border: rgba(30, 30, 30, 0.12);
  --font-serif: 'Source Serif 4', 'Iowan Old Style', 'Palatino', 'Times New Roman', serif;
  --font-sans: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-serif);
  background: var(--background);
  color: var(--text);
  min-height: 100vh;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: clamp(220px, 22vw, 280px);
  padding: 48px 32px;
  border-right: 1px solid var(--border);
}

.sidebar h1 {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: 700;
}

.sidebar p {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 12px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
  text-transform: lowercase;
  margin-top: 24px;
}

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

.nav a:hover {
  text-decoration: underline;
}

.nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.content {
  flex: 1;
  padding: clamp(32px, 6vw, 80px);
}

.card {
  max-width: 760px;
  background: var(--surface);
  padding: clamp(28px, 4vw, 40px);
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08), inset 0 0 0 1px rgba(255, 255, 255, 0.55);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.9), transparent 60%),
    linear-gradient(160deg, rgba(111, 76, 30, 0.07), transparent 55%);
  opacity: 0.6;
  pointer-events: none;
}

.card::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 14px;
  border: 1px solid rgba(30, 30, 30, 0.08);
  pointer-events: none;
}

.card > * {
  position: relative;
  z-index: 1;
}

.card--wide {
  max-width: 960px;
}

.hero-header {
  background: var(--surface);
  color: var(--text);
  padding: clamp(32px, 5vw, 44px) clamp(24px, 4vw, 40px);
  text-align: center;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}

.hero-header .hero-mosh {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
  mix-blend-mode: multiply;
  filter: grayscale(1) contrast(1.05);
  -webkit-mask-image: linear-gradient(
    to right,
    #000 0%,
    #000 22%,
    transparent 40%,
    transparent 60%,
    #000 78%,
    #000 100%
  );
  mask-image: linear-gradient(
    to right,
    #000 0%,
    #000 22%,
    transparent 40%,
    transparent 60%,
    #000 78%,
    #000 100%
  );
}

.hero-header > :not(.hero-mosh) {
  position: relative;
  z-index: 1;
}

@media (prefers-reduced-motion: reduce) {
  .hero-header .hero-mosh {
    display: none;
  }
}

.card h2 {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 4vw, 2.4rem);
  margin-bottom: 16px;
}

.card p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 18px;
}

.card a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.card a:hover {
  border-bottom-color: var(--accent);
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 32px 24px;
  }
}