:root {
  --bg: #f6f2e8;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #fffdf8;
  --ink: #1f1b16;
  --muted: #5f5a51;
  --line: rgba(31, 27, 22, 0.12);
  --line-strong: rgba(31, 27, 22, 0.2);
  --accent: #b64d1f;
  --accent-2: #176a69;
  --accent-3: #e6c15a;
  --shadow: 0 12px 40px rgba(25, 18, 10, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --shell: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(230, 193, 90, 0.22), transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(23, 106, 105, 0.12), transparent 48%),
    radial-gradient(circle at 50% 100%, rgba(182, 77, 31, 0.08), transparent 50%),
    var(--bg);
  font: 16px/1.6 "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande", sans-serif;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.14em;
}

a:hover {
  color: #8b3a17;
}

.shell {
  width: min(calc(100% - 2rem), var(--shell));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(246, 242, 232, 0.86);
  border-bottom: 1px solid var(--line);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 1px solid rgba(31, 27, 22, 0.16);
  box-shadow: 0 4px 12px rgba(25, 18, 10, 0.08);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 0.94rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.6);
  outline: none;
}

.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-color: rgba(182, 77, 31, 0.2);
  background: rgba(182, 77, 31, 0.08);
}

.page-main {
  padding: 2.25rem 0 4rem;
}

.page-shell {
  display: grid;
  gap: 1.25rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 253, 248, 0.86)),
    linear-gradient(135deg, rgba(230, 193, 90, 0.12), rgba(23, 106, 105, 0.08));
  position: relative;
  overflow: hidden;
}

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

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    linear-gradient(rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.84)),
    url("/assets/logo-main.png") center / cover no-repeat;
  opacity: 0.42;
  z-index: 0;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -50px;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(23, 106, 105, 0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  border: 1px solid rgba(182, 77, 31, 0.18);
  background: rgba(182, 77, 31, 0.06);
  color: #7d3516;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 700;
}

.hero h1,
.prose h1,
.prose h2,
.prose h3,
.section-title {
  margin: 0;
  font-family: "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  max-width: 16ch;
}

.hero-lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 60ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.72rem 1rem;
  text-decoration: none;
  font-weight: 700;
  line-height: 1;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #d96f2c);
  box-shadow: 0 10px 24px rgba(182, 77, 31, 0.22);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: #fff;
  background: linear-gradient(135deg, #9f431b, #c95f21);
  outline: none;
}

.btn-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
  border-color: var(--line);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  color: var(--ink);
  background: #fff;
  border-color: var(--line-strong);
  outline: none;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.stat {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.66);
  padding: 0.8rem;
}

.stat strong {
  display: block;
  font-size: 1.1rem;
  line-height: 1.1;
}

.stat span {
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  padding: 1.25rem;
}

.section + .section {
  margin-top: 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 1.45rem;
}

.section-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.card {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  line-height: 1.25;
}

.card p,
.card li {
  margin: 0;
  color: var(--muted);
}

.card ul {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.35rem;
}

.timeline {
  display: grid;
  gap: 0.7rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.7);
  padding: 0.9rem;
}

.timeline-step {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(23, 106, 105, 0.1);
  color: var(--accent-2);
  font-weight: 700;
  border: 1px solid rgba(23, 106, 105, 0.18);
}

.timeline-item h3 {
  margin: 0;
  font-size: 1rem;
}

.timeline-item p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1rem;
}

.notice {
  border-radius: var(--radius-sm);
  border: 1px solid rgba(23, 106, 105, 0.18);
  background: rgba(23, 106, 105, 0.06);
  padding: 1rem;
}

.notice h3 {
  margin: 0 0 0.35rem;
  color: #0f5352;
}

.notice p {
  margin: 0;
  color: #315d5d;
}

.list-clean {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.list-clean li {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.65);
  padding: 0.75rem 0.9rem;
}

.list-clean strong {
  display: block;
}

.list-clean span {
  color: var(--muted);
}

.footer {
  padding: 1.2rem 0 2.5rem;
  color: var(--muted);
}

.footer-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.62);
  padding: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.footer-mark {
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 1px solid rgba(31, 27, 22, 0.14);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--ink);
}

.doc-hero {
  padding: 1.5rem;
  display: grid;
  gap: 0.65rem;
}

.doc-hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.doc-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 75ch;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.75);
  padding: 0.28rem 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.doc-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1rem;
}

.toc {
  position: sticky;
  top: 90px;
  align-self: start;
  padding: 1rem;
}

.toc h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.toc a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  border-radius: 8px;
  padding: 0.3rem 0.45rem;
}

.toc a:hover,
.toc a:focus-visible {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
  outline: none;
}

.prose {
  padding: 1.2rem 1.3rem;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h1 {
  font-size: clamp(1.7rem, 2.4vw, 2.2rem);
  margin-bottom: 0.3rem;
}

.prose h2 {
  font-size: 1.28rem;
  margin: 1.5rem 0 0.55rem;
  padding-top: 0.2rem;
  border-top: 1px solid var(--line);
}

.prose h3 {
  font-size: 1rem;
  margin: 1rem 0 0.35rem;
}

.prose p {
  margin: 0.45rem 0;
}

.prose p,
.prose li {
  color: #2d2923;
}

.prose ul,
.prose ol {
  margin: 0.45rem 0;
  padding-left: 1.15rem;
}

.prose li + li {
  margin-top: 0.28rem;
}

.prose strong {
  color: var(--ink);
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1rem 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.7rem 0 0.2rem;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  text-align: left;
  vertical-align: top;
  border: 1px solid var(--line);
  padding: 0.55rem 0.65rem;
}

.prose th {
  background: rgba(23, 106, 105, 0.06);
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
}

.table-wrap table {
  margin: 0;
  border: 0;
}

.table-wrap th,
.table-wrap td {
  border-left: 0;
  border-right: 0;
}

.table-wrap tr:first-child th {
  border-top: 0;
}

.table-wrap tr:last-child td,
.table-wrap tr:last-child th {
  border-bottom: 0;
}

.prose pre {
  margin: 0.65rem 0;
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #1f1a17;
  color: #f5efe5;
  overflow-x: auto;
  font: 0.88rem/1.45 "Courier New", Courier, monospace;
}

.prose code {
  font-family: "Courier New", Courier, monospace;
}

.prose pre code {
  color: inherit;
}

.doc-callout {
  border: 1px solid rgba(182, 77, 31, 0.18);
  background: rgba(182, 77, 31, 0.05);
  border-radius: var(--radius-sm);
  padding: 0.85rem 0.95rem;
  margin: 0.8rem 0;
}

.doc-callout p {
  margin: 0;
  color: #5c4436;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.link-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.72);
  padding: 0.9rem;
  text-decoration: none;
  color: inherit;
}

.link-card:hover,
.link-card:focus-visible {
  border-color: rgba(23, 106, 105, 0.25);
  background: #fff;
  outline: none;
}

.link-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.link-card p {
  margin: 0;
  color: var(--muted);
}

.small {
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 980px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }
}

@media (max-width: 760px) {
  .nav-bar {
    align-items: start;
    flex-direction: column;
    padding: 0.8rem 0;
  }

  .hero,
  .doc-hero {
    padding: 1.15rem;
  }

  .hero::before {
    background-size: cover;
    opacity: 0.32;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-step {
    width: 1.8rem;
    height: 1.8rem;
  }

  .section,
  .prose,
  .toc {
    padding: 1rem;
  }
}