/*
 * Тёмная палитра, базируется на #011425 (тёмный navy).
 * Все производные цвета подобраны как контрастные / приглушённые версии
 * этого синего, чтобы лендинг выглядел как одно целое полотно.
 */
:root {
  --bg:           #011425;
  --bg-deep:      #000a16;        /* code blocks — темнее основного фона */
  --panel:        #02213d;        /* карточки релизов и details */
  --panel-soft:   #022a48;        /* при hover */
  --fg:           #e8eef5;
  --muted:        #8a9bab;
  --border:       rgba(255, 255, 255, 0.08);
  --border-strong:rgba(255, 255, 255, 0.16);

  --accent:       #4ea8ff;
  --accent-soft:  rgba(78, 168, 255, 0.16);

  --warning:      #f0b54a;
  --warning-soft: rgba(240, 181, 74, 0.10);

  --error:        #ff7474;

  --mono: "SF Mono", Monaco, "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PT Sans",
               Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ----- header ----- */

.hero {
  text-align: center;
  padding: 3.5rem 1rem 2.5rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #022036 0%, var(--bg) 100%);
}

.hero .logo {
  display: block;
  margin: 0 auto 1rem;
  max-height: 96px;
  max-width: 240px;
  width: auto;
  height: auto;
}

.hero h1 {
  font-size: 2.6rem;
  margin: 0 0 0.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero .tagline {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto;
}

/* ----- layout ----- */

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

section {
  margin-bottom: 3rem;
}

h2 {
  font-size: 1.4rem;
  margin: 0 0 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  color: var(--fg);
}

p {
  margin: 0.5rem 0;
}

ol, ul {
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.4em;
}

strong { color: var(--fg); }
em     { color: var(--muted); font-style: normal; text-transform: uppercase;
         font-size: 0.85em; letter-spacing: 0.05em; }

/* ----- code ----- */

code {
  font-family: var(--mono);
  background: var(--bg-deep);
  padding: 0.12em 0.36em;
  border-radius: 3px;
  font-size: 0.88em;
  color: #cdd9e6;
  border: 1px solid var(--border);
}

pre {
  background: var(--bg-deep);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border-radius: 6px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  margin: 0.75rem 0;
}

pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  border: 0;
  color: #cdd9e6;
}

/* ----- collapsible (commands, examples) ----- */

details {
  margin-bottom: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  transition: border-color 0.15s;
}

details:hover { border-color: var(--border-strong); }

details summary {
  cursor: pointer;
  user-select: none;
  padding: 0.8rem 1rem;
  font-weight: 500;
  font-size: 0.95rem;
  list-style: none;
}

details summary::-webkit-details-marker { display: none; }

details summary::before {
  content: "▸ ";
  color: var(--accent);
  display: inline-block;
  transition: transform 0.15s;
  font-size: 0.85em;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details[open] summary {
  border-bottom: 1px solid var(--border);
}

details > *:not(summary) {
  margin-left: 1rem;
  margin-right: 1rem;
}

details > pre {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
}

details > p {
  margin-top: 0.65rem;
  margin-bottom: 0.65rem;
  color: var(--muted);
}

details > p code,
details > p strong { color: var(--fg); }

details > p:last-child { margin-bottom: 0.75rem; }

/* ----- channel cards ----- */

.channel {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.25rem;
  background: var(--panel);
}

.channel-test {
  border-color: rgba(240, 181, 74, 0.4);
  background: linear-gradient(180deg, var(--warning-soft) 0%, var(--panel) 100%);
}

.channel-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}

.channel-header h3 {
  margin: 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.channel-test .channel-header h3 {
  color: var(--warning);
}

.channel .version {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--fg);
  font-weight: 600;
}

.channel .meta {
  color: var(--muted);
  font-size: 0.83rem;
  margin: 0 0 1rem;
}

.components {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .components { grid-template-columns: 1fr; }
}

.component h4 {
  font-size: 0.78rem;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.download {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  text-decoration: none;
  color: var(--fg);
  margin-bottom: 0.4rem;
  background: var(--bg-deep);
  font-size: 0.85rem;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.download:hover {
  border-color: var(--accent);
  background: var(--panel-soft);
  text-decoration: none;
  box-shadow: 0 0 0 1px var(--accent-soft);
}

.download .arch {
  font-weight: 500;
  flex: 1;
  font-family: var(--mono);
  font-size: 0.85em;
}

.download .size {
  color: var(--muted);
  font-size: 0.85em;
}

.download .sha {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  background: transparent;
  padding: 0;
  border: 0;
}

/* ----- channel-note (test fallback warning) ----- */

.channel-note {
  background: var(--warning-soft);
  border-left: 3px solid var(--warning);
  padding: 0.6rem 0.9rem;
  margin: 0 0 0.75rem;
  border-radius: 4px;
  color: var(--fg);
  font-size: 0.9rem;
}

/* ----- states ----- */

.loading,
.error {
  color: var(--muted);
  font-style: italic;
}

.error {
  color: var(--error);
  font-style: normal;
}

/* ----- footer ----- */

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}

footer p {
  margin: 0;
}