:root {
  --bg: #0a0d13;
  --panel: #121722;
  --panel2: #171d2b;
  --line: #263044;
  --text: #d9dfea;
  --muted: #8e99ad;
  --accent: #7fd1ff;
  --warm: #ffb86b;
  --good: #7ee08a;
  --bad: #ff7272;
  --warn: #ffd166;
  --mono: ui-monospace, 'JetBrains Mono', 'DejaVu Sans Mono', monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
}

a {
  color: var(--accent);
}

header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 13, 19, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

header.site nav {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.1rem;
  padding: 0.55rem 1rem;
  align-items: baseline;
}

header.site .brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  margin-right: 0.8rem;
  letter-spacing: 0.02em;
}

header.site a.item {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

header.site a.item.active,
header.site a.item:hover {
  color: var(--accent);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1rem 4rem;
}

h1 {
  font-size: 2rem;
  margin: 1.2rem 0 0.4rem;
  line-height: 1.2;
}

h2 {
  font-size: 1.35rem;
  margin: 2.2rem 0 0.6rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.08rem;
  margin: 1.4rem 0 0.4rem;
}

p.lead {
  font-size: 1.12rem;
  color: #c3cbda;
  max-width: 60rem;
}

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

.small {
  font-size: 0.88rem;
}

.grid2 {
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 1.2rem;
  align-items: start;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

@media (max-width: 820px) {
  .grid2 {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.9rem 1rem;
}

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.3rem;
  color: var(--accent);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.ctl {
  margin: 0.55rem 0;
}

.ctl label {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.92rem;
}

.ctl label .val {
  font-family: var(--mono);
  color: var(--warm);
  white-space: nowrap;
}

.ctl input[type='range'] {
  width: 100%;
  accent-color: var(--accent);
}

.ctl select {
  width: 100%;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.3rem;
}

.ctl .hint {
  font-size: 0.8rem;
  color: var(--muted);
}

.btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.5rem 0;
}

button {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0.35rem 0.7rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button.on {
  border-color: var(--warm);
  color: var(--warm);
}

table.kv {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

table.kv td {
  padding: 0.22rem 0.3rem;
  border-bottom: 1px solid #1c2333;
  vertical-align: top;
}

table.kv td:last-child {
  text-align: right;
  font-family: var(--mono);
  color: var(--warm);
  white-space: nowrap;
}

table.kv tr.sec td {
  color: var(--accent);
  font-family: inherit;
  text-align: left;
  padding-top: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.verdict {
  border-left: 4px solid var(--good);
  background: #10201a;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  margin: 0.6rem 0;
}

.verdict.warn {
  border-color: var(--warn);
  background: #221d0e;
}

.verdict.bad {
  border-color: var(--bad);
  background: #241212;
}

canvas.view {
  width: 100%;
  background: #05070b;
  border: 1px solid var(--line);
  border-radius: 10px;
  display: block;
}

.formula {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 1rem;
  margin: 0.7rem 0;
  overflow-x: auto;
}

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

.hero {
  position: relative;
  margin: 0 -1rem;
}

.hero canvas {
  width: 100%;
  height: min(70vh, 560px);
  display: block;
}

.hero .overlay {
  position: absolute;
  left: 1.5rem;
  bottom: 1.2rem;
  max-width: 34rem;
  text-shadow: 0 1px 4px #000;
}

.hero .overlay h1 {
  font-size: 2.3rem;
  margin: 0 0 0.3rem;
}

.numbers {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.6rem;
  margin: 1rem 0;
}

.numbers .n {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
}

.numbers .n b {
  display: block;
  font-family: var(--mono);
  font-size: 1.3rem;
  color: var(--warm);
}

.numbers .n span {
  color: var(--muted);
  font-size: 0.85rem;
}

details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.5rem 1rem;
  margin: 0.7rem 0;
}

details summary {
  cursor: pointer;
  color: var(--accent);
}

ul.refs li {
  margin: 0.35rem 0;
}

.check {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  margin: 0.6rem 0;
  background: var(--panel);
}

.check .head {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}

.check .mark {
  font-family: var(--mono);
  font-weight: 700;
}

.check .mark.ok {
  color: var(--good);
}

.check .mark.fail {
  color: var(--bad);
}

.check .mark.wait {
  color: var(--muted);
}

.check .nums {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
  word-break: break-word;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  padding: 1.5rem 1rem;
  text-align: center;
}

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

.legend i {
  display: inline-block;
  width: 0.9em;
  height: 0.25em;
  vertical-align: middle;
  margin-right: 0.3em;
}

.row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.row > * {
  flex: 1 1 300px;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: #1a2130;
  padding: 0.05em 0.3em;
  border-radius: 4px;
}