:root {
  --bg: #f4efe7;
  --surface: rgba(255, 250, 244, 0.86);
  --surface-strong: #fffaf4;
  --ink: #1f2933;
  --muted: #5c6b73;
  --accent: #d96c3d;
  --accent-soft: #f3d3c1;
  --stroke: rgba(31, 41, 51, 0.1);
  --shadow: 0 20px 60px rgba(73, 56, 42, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(217, 108, 61, 0.18), transparent 32%),
    radial-gradient(circle at right, rgba(113, 149, 124, 0.15), transparent 22%),
    linear-gradient(180deg, #fbf6ef 0%, var(--bg) 100%);
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  padding: 20px 0 28px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  line-height: 0.95;
}

.intro {
  max-width: 680px;
  margin: 18px 0 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.guide-card,
.detail-panel {
  border: 1px solid var(--stroke);
  border-radius: 28px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.guide-card {
  display: block;
  padding: 22px;
  text-align: left;
  color: inherit;
  text-decoration: none;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.guide-card:hover,
.guide-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(217, 108, 61, 0.45);
}

.guide-card:focus-visible {
  outline: 3px solid rgba(217, 108, 61, 0.2);
  outline-offset: 2px;
}

.card-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  margin-bottom: 18px;
  font-size: 1.35rem;
  background: var(--accent-soft);
}

.guide-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.detail-panel {
  padding: 28px;
}

.page-detail {
  width: min(860px, calc(100% - 32px));
}

.detail-panel-page {
  background: linear-gradient(180deg, var(--surface-strong) 0%, rgba(255, 250, 244, 0.92) 100%);
}

.back-link {
  display: inline-flex;
  margin: 8px 0 18px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.back-link:hover,
.back-link:focus-visible {
  text-decoration: underline;
}

.detail-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 12px;
}

.detail-icon {
  margin-bottom: 0;
  flex-shrink: 0;
}

.detail-page-title {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1;
}

.detail-summary {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.detail-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
}

.detail-panel h2 {
  margin: 0 0 14px;
  font-size: 2rem;
}

.detail-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.detail-list {
  margin: 22px 0 0;
  padding-left: 18px;
  color: var(--ink);
  line-height: 1.7;
}

.detail-list li + li {
  margin-top: 10px;
}

@media (max-width: 980px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 20px, 1120px);
    padding-top: 24px;
  }

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

  .guide-card,
  .detail-panel {
    border-radius: 22px;
  }

  .detail-header {
    align-items: flex-start;
    flex-direction: column;
  }
}