:root {
  --bg0: #12201c;
  --bg1: #1a2f28;
  --bg2: #243d34;
  --ink: #e8f0eb;
  --muted: #9bb0a5;
  --accent: #6ec4b0;
  --accent-ink: #0d1a16;
  --warn: #e0a45a;
  --danger: #d97878;
  --line: rgba(232, 240, 235, 0.12);
  --radius: 14px;
  --font: "Trebuchet MS", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --space: clamp(1rem, 3vw, 1.5rem);
}

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

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #2a4a3e 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1e3a48 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 45%, #152822);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #9ad9cb;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  gap: 0.75rem;
  padding: 0.85rem var(--space);
  background: rgba(18, 32, 28, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.top__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1rem;
}

.top__home {
  color: var(--ink);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.top__auth {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.top__logout {
  margin: 0;
  display: inline;
}

.top__user {
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.85rem;
  color: var(--muted);
}

.top__offline {
  display: grid;
  gap: 0.45rem;
}

.login__actions {
  margin: 1.25rem 0 0;
  display: grid;
  gap: 0.75rem;
  justify-items: start;
}

.login__actions .btn--yandex,
.login__actions #offline-view-btn {
  width: min(100%, 22rem);
  justify-content: center;
}

.login__actions #offline-view-btn {
  padding: 0.7rem 1.1rem;
  font-size: 1rem;
}

.login__offline-hint {
  margin: 0;
  max-width: 22rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.top__status {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.top__progress {
  width: 100%;
  height: 0.55rem;
  accent-color: var(--accent);
}

.main {
  width: min(42rem, 100%);
  margin: 0 auto;
  padding: 1.25rem var(--space) 3rem;
}

.foot {
  width: min(42rem, 100%);
  margin: 0 auto;
  padding: 0 var(--space) 2.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero h1,
.page__head h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero--compact h1 {
  font-size: clamp(1.35rem, 4vw, 1.75rem);
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.crumbs a {
  color: var(--muted);
}

.subnav {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
}

.card-list,
.link-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.card-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(36, 61, 52, 0.55);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.card-link:hover {
  border-color: rgba(110, 196, 176, 0.45);
  background: rgba(46, 78, 66, 0.7);
  color: var(--ink);
}

.card-link__title {
  font-weight: 650;
  font-size: 1.05rem;
}

.card-link__meta {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

.link-list a {
  display: block;
  padding: 0.85rem 0.95rem;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid var(--line);
  background: rgba(36, 61, 52, 0.4);
  color: var(--ink);
  text-decoration: none;
  font-size: 1.02rem;
  line-height: 1.35;
}

.link-list a:hover {
  border-color: rgba(110, 196, 176, 0.4);
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1.1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: var(--accent-ink);
}

.btn:disabled {
  opacity: 0.55;
  cursor: wait;
}

a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
}

.btn--ghost:hover {
  border-color: rgba(110, 196, 176, 0.45);
  color: #9ad9cb;
}

.btn--yandex {
  background: #fc3f1d;
  color: #fff;
}

.btn--yandex:hover {
  filter: brightness(1.06);
  color: #fff;
}

.btn--video {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  text-decoration: none;
  font-size: 1.05rem;
}

.page__type {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.block {
  margin-top: 1.5rem;
  padding-top: 0.25rem;
}

.block__title {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}

.fold {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(36, 61, 52, 0.4);
  overflow: clip;
}

.fold__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 3rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.fold__summary::-webkit-details-marker {
  display: none;
}

.fold__summary::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.fold[open] > .fold__summary::before {
  transform: rotate(45deg);
}

.fold__title {
  flex: 1;
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.3;
}

.fold__meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.fold__body {
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--line);
}

.fold__body .link-list {
  margin-top: 0.85rem;
}

.prose {
  margin: 0.55rem 0;
  overflow-wrap: anywhere;
}

.prose p {
  margin: 0.4rem 0;
}

.prose--header {
  font-size: 1.15rem;
  font-weight: 700;
}

.prose--subheader {
  font-size: 1.05rem;
  font-weight: 650;
  color: #c5ddd3;
}

.video {
  margin: 0.85rem 0 1.1rem;
  padding: 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(18, 32, 28, 0.55);
}

.video--missing {
  border-color: rgba(224, 164, 90, 0.35);
}

.video__warn {
  margin: 0;
  color: var(--warn);
  font-weight: 650;
}

.video__file {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.banner {
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  background: rgba(36, 61, 52, 0.55);
  border: 1px solid var(--line);
}

.banner--warn {
  border-color: rgba(224, 164, 90, 0.4);
  color: #f0d2a8;
}

code {
  font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, monospace;
  font-size: 0.9em;
}

@media (min-width: 720px) {
  .top {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .top__offline {
    justify-items: end;
    min-width: 16rem;
  }
}