:root {
  --bg: #f4efe5;
  --panel: rgba(255, 250, 240, 0.86);
  --panel-strong: #fffaf2;
  --ink: #1d2330;
  --muted: #5f6778;
  --accent: #a33a24;
  --accent-deep: #7d2515;
  --line: rgba(29, 35, 48, 0.12);
  --shadow: 0 24px 60px rgba(75, 53, 29, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(200, 118, 55, 0.22), transparent 28rem),
    radial-gradient(circle at top right, rgba(22, 103, 120, 0.18), transparent 24rem),
    linear-gradient(180deg, #f9f3e9 0%, var(--bg) 55%, #efe6d7 100%);
  font-family: "Trebuchet MS", "Gill Sans", "Segoe UI", sans-serif;
  line-height: 1.6;
}

code,
pre {
  font-family: "SFMono-Regular", "Consolas", "Liberation Mono", monospace;
}

.page-shell {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 3.5rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 32px;
  background:
    linear-gradient(145deg, rgba(255, 248, 237, 0.95), rgba(247, 236, 222, 0.9)),
    linear-gradient(180deg, rgba(163, 58, 36, 0.08), transparent);
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -4rem -5rem auto;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(163, 58, 36, 0.18), transparent 68%);
  pointer-events: none;
}

.hero__eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(29, 35, 48, 0.08);
  color: var(--accent-deep);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.4rem, 4vw, 4.8rem);
  line-height: 0.98;
}

.hero__lead {
  max-width: 42rem;
  margin: 1rem 0 0;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero__actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 700;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-color: transparent;
}

.button--ghost {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.45);
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.toc {
  position: sticky;
  top: 1rem;
  align-self: start;
}

.toc__card,
.content section {
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.toc__card {
  padding: 1.25rem;
}

.toc h2 {
  margin-top: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.toc nav {
  display: grid;
  gap: 0.35rem;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.35rem 0;
}

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

.content {
  display: grid;
  gap: 1.25rem;
}

.content section {
  padding: 1.75rem;
}

.content h2 {
  margin-top: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.8rem;
}

.content h3 {
  margin-bottom: 0.55rem;
  font-size: 1.05rem;
}

.content p,
.content li {
  color: var(--ink);
}

.content ul,
.content ol {
  padding-left: 1.25rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-strong);
}

.note {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  border-radius: 16px;
  background: rgba(163, 58, 36, 0.08);
}

pre {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(18, 25, 35, 0.08);
  border-radius: 18px;
  background: #201d1a;
  color: #f3eadc;
}

code {
  padding: 0.1rem 0.3rem;
  border-radius: 6px;
  background: rgba(18, 25, 35, 0.08);
}

pre code {
  padding: 0;
  background: transparent;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel-strong);
  border-radius: 18px;
  overflow: hidden;
}

th,
td {
  padding: 0.85rem 0.95rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  background: rgba(29, 35, 48, 0.06);
}

tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

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

  .hero {
    padding: 2rem;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 1rem, 1200px);
    padding-top: 0.75rem;
  }

  .hero {
    border-radius: 24px;
  }

  .content section,
  .toc__card {
    padding: 1.2rem;
  }

  .hero__actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}