:root {
  --ink: #10241c;
  --ink-soft: #2a4036;
  --muted: #5c7268;
  --paper: #eef5f0;
  --paper-deep: #e2ece6;
  --surface: #f7fbf8;
  --line: #c5d4cb;
  --accent: #0f7a52;
  --accent-deep: #0a5c3d;
  --accent-soft: #d4eee2;
  --gold: #b8923a;
  --shadow: 0 18px 40px rgba(16, 36, 28, 0.08);
  --radius: 16px;
  --shell: 1080px;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

  .masthead__glow {
    animation: none !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.7;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(15, 122, 82, 0.12), transparent 55%),
    radial-gradient(900px 420px at 100% 0%, rgba(184, 146, 58, 0.1), transparent 50%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

.skip-link:focus {
  top: 16px;
}

.shell {
  width: min(100% - 40px, var(--shell));
  margin-inline: auto;
}

.masthead {
  position: relative;
  overflow: hidden;
  color: #f4faf6;
  background:
    linear-gradient(145deg, #0d2a1f 0%, #163d2c 48%, #0f241c 100%);
  border-bottom: 1px solid rgba(212, 238, 226, 0.12);
}

.masthead__glow {
  position: absolute;
  inset: auto -20% -40% 40%;
  height: 280px;
  background: radial-gradient(circle, rgba(15, 122, 82, 0.45), transparent 65%);
  filter: blur(8px);
  animation: drift 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes drift {
  from {
    transform: translateX(-24px) scale(1);
  }
  to {
    transform: translateX(36px) scale(1.08);
  }
}

.masthead__inner {
  position: relative;
  padding: 56px 0 48px;
}

.brand {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
  background: linear-gradient(90deg, #f4faf6 0%, #9fd9bd 55%, #e8d39a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.masthead h1 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.2vw, 2rem);
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  max-width: 36rem;
  color: rgba(244, 250, 246, 0.78);
  font-size: 1.05rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 28px 0 0;
}

.meta > div {
  min-width: 120px;
}

.meta dt {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(232, 211, 154, 0.85);
  font-weight: 600;
}

.meta dd {
  margin: 4px 0 0;
  font-weight: 600;
  color: #f4faf6;
}

.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 36px;
  padding: 40px 0 64px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 24px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(247, 251, 248, 0.88);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}

.toc__label {
  margin: 0 0 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.toc a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.toc a:hover,
.toc a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-deep);
  border-left-color: var(--accent);
  outline: none;
}

.content {
  min-width: 0;
}

.block {
  margin: 0 0 28px;
  padding: 28px 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.block:last-of-type {
  margin-bottom: 0;
}

.block h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.block h3 {
  margin: 22px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-deep);
}

.block p {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

.block p:last-child {
  margin-bottom: 0;
}

.block ul {
  margin: 0 0 12px;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.block li {
  margin: 0.4rem 0;
}

.block li::marker {
  color: var(--accent);
}

.callout {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(15, 122, 82, 0.22);
  background: linear-gradient(135deg, var(--accent-soft), #f3f8f5);
}

.callout p {
  margin: 0;
  color: var(--accent-deep);
  font-weight: 500;
}

.defs {
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}

.defs > div {
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--paper);
  border: 1px solid rgba(197, 212, 203, 0.7);
}

.defs dt {
  margin: 0 0 4px;
  font-weight: 700;
  color: var(--ink);
}

.defs dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.chips {
  list-style: none;
  padding: 0 !important;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips li {
  margin: 0 !important;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid rgba(15, 122, 82, 0.18);
}

.block--contact {
  background:
    linear-gradient(160deg, #123528 0%, #1a4634 100%);
  border-color: transparent;
  color: #f4faf6;
}

.block--contact h2,
.block--contact p {
  color: #f4faf6;
}

.block--contact p {
  opacity: 0.9;
}

.contact-link {
  margin-top: 8px !important;
}

.contact-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(244, 250, 246, 0.12);
  border: 1px solid rgba(232, 211, 154, 0.45);
  color: #e8d39a;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.contact-link a:hover,
.contact-link a:focus-visible {
  background: rgba(232, 211, 154, 0.18);
  transform: translateY(-1px);
  outline: none;
}

.page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding-top: 8px;
}

.page-footer__brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--muted);
}

.back-top {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--accent-deep);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(16, 36, 28, 0.05);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.back-top:hover,
.back-top:focus-visible {
  background: var(--accent-soft);
  border-color: rgba(15, 122, 82, 0.35);
  outline: none;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 28px 0 48px;
  }

  .toc {
    position: static;
    padding: 14px;
  }

  .toc ol {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 8px;
  }

  .block {
    padding: 22px 18px 18px;
  }

  .masthead__inner {
    padding: 40px 0 36px;
  }
}

@media (max-width: 520px) {
  .shell {
    width: min(100% - 28px, var(--shell));
  }

  .toc ol {
    grid-template-columns: 1fr;
  }

  .meta {
    gap: 14px 20px;
  }

  body {
    font-size: 16px;
  }
}