:root {
  --bg: #f5ede5;
  --surface: rgba(255, 250, 245, 0.9);
  --surface-strong: #fffaf5;
  --text: #231916;
  --text-soft: #5e4a44;
  --line: rgba(122, 59, 46, 0.14);
  --accent: #7d2b0b;
  --accent-soft: rgba(125, 43, 11, 0.1);
  --shadow: 0 24px 60px rgba(55, 32, 25, 0.1);
}

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

body {
  margin: 0;
  min-width: 320px;
  font-family: "Instrument Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(185, 135, 82, 0.16), transparent 28%),
    linear-gradient(180deg, #fbf5ee 0%, var(--bg) 48%, #efe1d0 100%);
  line-height: 1.65;
}

a {
  color: inherit;
}

.page-shell {
  width: min(100% - 2rem, 960px);
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.case-study {
  padding: clamp(1.6rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.brand-link,
.back-link {
  text-decoration: none;
}

.brand-link {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.back-link {
  color: var(--text-soft);
  font-weight: 600;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(2.35rem, 5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.lede {
  max-width: 44rem;
  margin: 1rem 0 0;
  color: var(--text-soft);
  font-size: 1.05rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.8rem;
}

.summary-card,
.section-card {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-strong);
}

.summary-card span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-soft);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.summary-card strong {
  font-size: 1rem;
}

.sections {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

.section-card h2 {
  margin: 0 0 0.6rem;
  font-family: "Fraunces", serif;
  font-size: 1.45rem;
  line-height: 1.12;
}

.section-card p,
.section-card li {
  color: var(--text-soft);
}

.section-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1rem;
  margin-top: 1.8rem;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

.button {
  background: var(--accent);
  color: #fff8f3;
}

.button-secondary {
  border-color: var(--line);
  background: var(--accent-soft);
  color: var(--accent);
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 1rem, 960px);
    padding-top: 1rem;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
  }
}