:root {
  --bg: #17110b;
  --bg-deep: #120d09;
  --panel: rgba(34, 24, 15, 0.82);
  --panel-soft: rgba(45, 32, 20, 0.62);
  --text: #eadcc2;
  --muted: #bba47d;
  --line: rgba(216, 182, 119, 0.20);
  --line-strong: rgba(216, 182, 119, 0.40);
  --accent: #c8923d;
  --accent-soft: rgba(200, 146, 61, 0.12);
  --shadow: rgba(0, 0, 0, 0.34);
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Baskerville, "Libre Baskerville", "Times New Roman", serif;
  background:
    radial-gradient(circle at top left, rgba(194, 143, 67, 0.10), transparent 32%),
    radial-gradient(circle at 85% 15%, rgba(130, 87, 31, 0.16), transparent 26%),
    linear-gradient(180deg, rgba(255,255,255,0.02), transparent 22%),
    repeating-linear-gradient(
      90deg,
      rgba(255,255,255,0.012) 0,
      rgba(255,255,255,0.012) 1px,
      transparent 1px,
      transparent 72px
    ),
    linear-gradient(180deg, #24180e 0%, #17110b 42%, #120d09 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s ease, color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.shell {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 20px 0 48px;
}

.layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  min-height: calc(100vh - 40px);
  border: 1px solid var(--line);
  box-shadow: 0 12px 40px var(--shadow);
  background: linear-gradient(180deg, rgba(255,255,255,0.018), rgba(255,255,255,0.006));
}

.sidebar {
  padding: 44px 30px 40px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.018), rgba(255,255,255,0));
}

.sidebar-external {
  margin-top: 8px;
  opacity: 0.9;
}

.brand-mark {
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 10px;
}

.brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.brand p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 17ch;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar nav a {
  opacity: 0.78;
  position: relative;
  width: fit-content;
  font-size: 17px;
  padding-bottom: 2px;
}

.sidebar nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0;
  height: 1px;
  background: var(--line-strong);
  transition: width 0.2s ease;
}

.sidebar nav a:hover,
.sidebar nav a.active {
  opacity: 1;
  color: #f4e7cd;
}

.sidebar nav a:hover::after,
.sidebar nav a.active::after {
  width: 100%;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.35;
  font-size: 15px;
}

.content {
  padding: 54px 72px 72px 96px;
  max-width: 900px;
}

.crest {
  margin-bottom: 36px;
}

.crest-top {
  display: flex;
  align-items: start;
  gap: 16px;
}

.crest-mark {
  font-size: 28px;
  line-height: 1;
  color: #f0ddba;
  width: 26px;
  flex: 0 0 26px;
}

.crest-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.crest-text strong {
  font-size: 16px;
  letter-spacing: 0.02em;
}

.crest-text span {
  color: var(--muted);
  line-height: 1.5;
}

.crest-rule {
  margin-top: 16px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), rgba(216, 182, 119, 0.08));
}

.eyebrow,
.mini-label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
}

.mini-label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(2.05rem, 4vw, 3.05rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

h3 {
  margin: 0 0 12px;
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.15;
}

p {
  margin: 0 0 18px;
  font-size: 1.1rem;
  line-height: 1.75;
}

.lead {
  max-width: 64ch;
  color: #efe2c8;
  font-size: 1.18rem;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 42px;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  background: transparent;
}

.button {
  background: var(--accent-soft);
}

.button:hover,
.button-secondary:hover {
  border-color: rgba(216, 182, 119, 0.72);
  background: rgba(255,255,255,0.035);
}

.panel-grid {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.triad-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.dual-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel {
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), rgba(25, 17, 11, 0.72));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
}

.panel p:last-child,
.panel ul:last-child,
.panel .button-row:last-child {
  margin-bottom: 0;
}

.clean-list,
.study-list,
.path-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.clean-list li,
.study-list li,
.path-list li {
  margin: 0;
  padding: 12px 0;
  border-top: 1px solid rgba(216, 182, 119, 0.12);
  line-height: 1.6;
  color: #ecdfc8;
}

.clean-list li:first-child,
.study-list li:first-child,
.path-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.clean-list strong,
.study-list strong,
.path-list strong {
  display: block;
  margin-bottom: 4px;
  color: #f3e7d0;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.quote {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.6;
  color: #f0e0c5;
}

.quote small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.footer-note {
  margin-top: 34px;
  color: var(--muted);
  font-size: 1rem;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .content {
    padding: 48px 44px 60px 56px;
  }

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

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

@media (max-width: 760px) {
  .shell {
    width: min(var(--max), calc(100% - 24px));
    padding: 12px 0 28px;
  }

  .layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 28px 22px 24px;
  }

  .brand p {
    max-width: none;
  }

  .content {
    padding: 30px 22px 40px;
    max-width: none;
  }

  .crest {
    margin-bottom: 28px;
  }

  .hero-actions,
  .button-row {
    margin: 24px 0 30px;
  }

  .button,
  .button-secondary {
    width: 100%;
    justify-content: center;
  }

  h2 {
    max-width: none;
  }

  p,
  .lead {
    font-size: 1.04rem;
    line-height: 1.72;
 
 }
.shelf-panel h3 {
  margin-bottom: 18px;
}

.shelf-section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(216, 182, 119, 0.12);
}

.shelf-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.shelf-heading {
  margin-bottom: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #f1e2c6;
  text-transform: uppercase;
}

.library-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2px;
}

.library-list li {
  position: relative;
  margin: 0;
  padding: 0 0 0 20px;
  color: #eadcc2;
  line-height: 1.75;
}

.library-list li + li {
  margin-top: 4px;
}

.library-list li::before {
  content: "·";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--muted);
  font-size: 1.1em;
}

@media (max-width: 1080px) {
  .shelf-panel {
    height: auto;
  }
}

}