:root {
  --ink: #10222c;
  --ink-soft: #3a5160;
  --paper: #eef3f6;
  --paper-2: #f7fafb;
  --line: rgba(16, 34, 44, 0.12);
  --accent: #0b7a78;
  --accent-deep: #065e5c;
  --signal: #c45f1a;
  --ok: #1f6b45;
  --open: #8a5a12;
  --shadow: 0 18px 50px rgba(16, 34, 44, 0.08);
  --font-sans: "Commissioner", sans-serif;
  --font-display: "Literata", Georgia, serif;
  --max: 72rem;
  --radius: 0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.55;
  background: var(--paper);
  position: relative;
}

a {
  color: var(--accent-deep);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--signal);
}

code {
  font-size: 0.92em;
  background: rgba(11, 122, 120, 0.08);
  padding: 0.1em 0.35em;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 520px at 8% -10%, rgba(11, 122, 120, 0.18), transparent 60%),
    radial-gradient(900px 480px at 92% 8%, rgba(196, 95, 26, 0.12), transparent 55%),
    linear-gradient(165deg, #e7eef2 0%, #f4f8fa 42%, #ebe4d8 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(16, 34, 44, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 34, 44, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 78%);
}

.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.5rem 0.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1rem 2rem;
  animation: rise 0.7s ease both;
}

.brand {
  text-decoration: none;
  color: inherit;
  display: grid;
  gap: 0.15rem;
}

.brand__mark {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.brand__name {
  font-size: 0.95rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.nav__link {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.hero {
  padding: 2.2rem 0 2.6rem;
  max-width: 40rem;
  animation: rise 0.8s 0.05s ease both;
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent-deep);
  font-weight: 600;
}

.hero__brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.4rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero__title {
  margin: 0.55rem 0 1rem;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 600;
}

.hero__lead,
.hero__meta {
  margin: 0;
  color: var(--ink-soft);
  max-width: 36rem;
}

.hero__meta {
  margin-top: 0.85rem;
  font-size: 0.95rem;
}

.panel {
  background: color-mix(in srgb, var(--paper-2) 88%, white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  animation: rise 0.85s 0.12s ease both;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.tabs__btn {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 1rem 1.25rem;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.tabs__btn:hover {
  color: var(--ink);
  background: rgba(11, 122, 120, 0.04);
}

.tabs__btn.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.tab-panels {
  padding: 1.6rem 1.4rem 2rem;
}

.tab-panel[hidden] {
  display: none;
}

.tab-panel.is-active {
  animation: fade-panel 0.35s ease both;
}

.section-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.85rem;
  letter-spacing: -0.02em;
}

.section-sub {
  margin: 1.6rem 0 0.65rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.prose {
  margin: 0 0 0.85rem;
  max-width: 48rem;
}

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

.prose--accent {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--ink);
}

.contour-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.contour-list__item {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}

.contour-list__item strong {
  font-size: 1.02rem;
}

.contour-list__item span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.stack-list {
  margin: 0;
  padding-left: 1.25rem;
  max-width: 48rem;
}

.stack-list li + li {
  margin-top: 0.55rem;
}

.stack-list--bullets {
  padding-left: 1.15rem;
}

.tz-block + .tz-block {
  margin-top: 0.5rem;
}

.plan-group--now .section-sub {
  color: var(--accent-deep);
}

.plan-group--later {
  opacity: 0.85;
}

.page-head {
  padding: 1.5rem 0 1.8rem;
  max-width: 44rem;
  animation: rise 0.7s ease both;
}

.page-head__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.page-head__lead {
  margin: 0;
  color: var(--ink-soft);
}

.page-head__stats {
  margin: 0.9rem 0 0;
  font-weight: 600;
  color: var(--accent-deep);
  font-size: 0.95rem;
}

.theme-block {
  margin-bottom: 2.4rem;
  animation: rise 0.75s ease both;
}

.theme-block__head {
  margin-bottom: 0.9rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.theme-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.55rem;
}

.theme-block__whom {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.q-catalog {
  list-style: none;
  margin: 0;
  padding: 0;
}

.q-catalog__item {
  border-bottom: 1px solid var(--line);
}

.q-catalog__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem 0.85rem;
  align-items: start;
  padding: 0.95rem 0.15rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease;
}

.q-catalog__link:hover {
  background: rgba(11, 122, 120, 0.05);
}

.q-catalog__num {
  font-weight: 700;
  color: var(--accent-deep);
  min-width: 1.6rem;
}

.q-catalog__text {
  max-width: 46rem;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  align-self: center;
}

.badge--ok {
  color: var(--ok);
}

.badge--open {
  color: var(--open);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(247, 250, 251, 0.72);
}

.qa-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
}

.qa-table th,
.qa-table td {
  vertical-align: top;
  text-align: left;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--line);
}

.qa-table thead th {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: rgba(16, 34, 44, 0.04);
  white-space: nowrap;
}

.qa-table tbody tr {
  scroll-margin-top: 1.25rem;
}

.qa-table tbody tr:last-child th,
.qa-table tbody tr:last-child td {
  border-bottom: none;
}

.qa-table__col-num {
  width: 3.2rem;
}

.qa-table__col-q {
  width: 38%;
}

.qa-table__num {
  font-weight: 700;
  color: var(--accent-deep);
  white-space: nowrap;
}

.qa-table__q {
  max-width: 28rem;
}

.qa-table__a {
  max-width: 36rem;
  color: var(--ink);
}

.qa-table__a--empty {
  color: var(--ink-soft);
}

.qa-table__placeholder {
  font-style: italic;
}

.files-table__col-status {
  width: 7rem;
  text-align: center;
}

.files-table__status {
  text-align: center;
  white-space: nowrap;
}

.files-table__empty {
  color: var(--ink-soft);
  font-weight: 600;
}

.files-table__note {
  color: var(--ink-soft);
  font-size: 0.92rem;
  max-width: 18rem;
}

.glossary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 48rem;
}

.glossary-list__item {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.glossary-list__item strong {
  color: var(--accent-deep);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fade-panel {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 720px) {
  .q-catalog__link {
    grid-template-columns: auto 1fr;
  }

  .badge {
    grid-column: 2;
  }

  .qa-table th,
  .qa-table td {
    padding: 0.75rem 0.65rem;
  }

  .qa-table__col-q,
  .qa-table__col-a {
    width: auto;
  }

  .tabs__btn {
    flex: 1 1 auto;
    padding: 0.85rem 0.75rem;
    font-size: 0.95rem;
  }

  .tab-panels {
    padding: 1.25rem 1rem 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}