:root {
  --h: 188;
  --accent: hsl(var(--h) 92% 60%);
  --accent-bright: hsl(var(--h) 96% 74%);
  --accent-soft: hsl(var(--h) 92% 60% / 0.12);
  --accent-line: hsl(var(--h) 92% 60% / 0.3);
  --bg: #04060c;
  --ink: #e9f2ff;
  --soft: #c3d2e8;
  --muted: #8ea2c0;
  --dim: #62748f;
  --line: rgba(126, 166, 214, 0.14);
  --line-strong: rgba(126, 166, 214, 0.24);
  --font: "Segoe UI", "Inter", system-ui, -apple-system, Arial, sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  color-scheme: dark;
}

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

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body.page {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--soft);
  background:
    radial-gradient(1000px 600px at 80% -10%, hsl(var(--h) 90% 40% / 0.13), transparent 60%),
    linear-gradient(180deg, #05080f, #04060c 50%, #03050a);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: hsl(var(--h) 92% 60% / 0.35);
  color: #fff;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1, h2, h3, h4, p, ul, ol {
  margin-top: 0;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.015em;
}

svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-aura {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 80% 60% at 70% 10%, hsl(var(--h) 90% 50% / 0.08), transparent 60%);
  z-index: 0;
}

.page-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, hsl(var(--h) 80% 60% / 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, hsl(var(--h) 80% 60% / 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000, transparent 80%);
  z-index: 0;
}

.page-top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(4, 7, 13, 0.94), rgba(4, 7, 13, 0.72));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.page-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.page-brand:hover {
  text-decoration: none;
}

.page-brand img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.page-brand span {
  display: grid;
  line-height: 1.15;
}

.page-brand b {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.28em;
  font-weight: 600;
}

.page-brand small {
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.16em;
  color: var(--dim);
}

.page-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}

.page-nav a {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 12px;
  color: var(--muted);
}

.page-nav a:hover {
  text-decoration: none;
  color: var(--accent-bright);
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.page-nav a.active {
  color: var(--accent-bright);
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.page-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.page-back svg {
  width: 14px;
  height: 14px;
}

.page-back:hover {
  text-decoration: none;
  color: var(--accent-bright);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

.page-main {
  position: relative;
  z-index: 1;
  max-width: 940px;
  margin: 0 auto;
  padding: clamp(36px, 7vw, 78px) clamp(18px, 4vw, 36px) clamp(50px, 8vw, 100px);
}

.page-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.page-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}

.page-main h1 {
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin-bottom: 18px;
  text-wrap: balance;
}

.page-main h1 em {
  font-style: normal;
  color: var(--accent-bright);
}

.page-lead {
  font-size: clamp(15px, 1.7vw, 18px);
  color: var(--muted);
  max-width: 68ch;
  margin-bottom: 34px;
}

.page-main h2 {
  font-size: clamp(22px, 2.6vw, 28px);
  margin: 44px 0 14px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-main h3 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 28px 0 8px;
}

.page-main h4 {
  font-size: 15px;
  margin: 20px 0 6px;
}

.page-main p,
.page-main li {
  color: var(--soft);
}

.page-main p {
  margin-bottom: 15px;
}

.page-main ul,
.page-main ol {
  padding-left: 22px;
  margin-bottom: 18px;
}

.page-main li {
  margin-bottom: 7px;
}

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

.page-main strong {
  color: var(--ink);
  font-weight: 600;
}

.page-main code {
  font-family: var(--mono);
  font-size: 0.85em;
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
  color: var(--accent-bright);
}

.page-main a {
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 3px;
}

.page-main a:hover {
  text-decoration-color: var(--accent);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0 30px;
}

.card {
  padding: 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(15, 23, 40, 0.55), rgba(7, 11, 20, 0.6));
}

.card h3 {
  margin: 0 0 6px;
  font-family: var(--font);
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}

.card p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.card .card-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 11px;
  border-radius: 9px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.card .card-icon svg {
  width: 17px;
  height: 17px;
}

.callout {
  margin: 24px 0;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--accent-line);
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  font-size: 13.5px;
  color: var(--soft);
}

.callout b {
  color: var(--ink);
}

.callout.warn {
  border-color: rgba(255, 200, 87, 0.3);
  border-left-color: #ffc857;
  background: rgba(255, 200, 87, 0.07);
}

.callout.warn b {
  color: #ffe0a0;
}

.fact-list {
  display: grid;
  gap: 1px;
  margin: 18px 0 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--line);
}

.fact {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 14px;
  padding: 10px 14px;
  background: rgba(6, 10, 18, 0.82);
  font-size: 13px;
}

.fact span {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  padding-top: 4px;
}

.fact b {
  color: var(--soft);
  font-weight: 400;
}

.source-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 18px;
  margin: 18px 0 24px;
  padding: 0;
  list-style: none;
}

.source-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  margin: 0;
}

.source-list li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  flex: 0 0 auto;
}

.source-list span {
  color: var(--dim);
  font-size: 11px;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 12px;
  margin: 20px 0 28px;
  padding: 0;
  list-style: none;
}

.steps li {
  position: relative;
  counter-increment: step;
  padding: 14px 16px 14px 54px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.018);
  margin: 0;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 15px;
  top: 15px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--accent-bright);
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 2px 6px;
}

.steps b {
  display: block;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 2px;
}

.steps p {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}

kbd {
  font-family: var(--mono);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 5px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--soft);
  white-space: nowrap;
}

.page-foot {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(4, 7, 13, 0.7));
}

.pf-main {
  max-width: 940px;
  margin: 0 auto;
  padding: 28px clamp(18px, 4vw, 36px) 20px;
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.pf-brand {
  max-width: 420px;
}

.pf-brand b {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink);
}

.pf-brand p {
  margin: 6px 0 0;
  font-size: 11.5px;
  color: var(--dim);
}

.pf-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: flex-start;
}

.pf-links a {
  font-size: 11.5px;
  color: var(--muted);
}

.pf-links a:hover {
  color: var(--accent-bright);
}

.pf-meta {
  max-width: 940px;
  margin: 0 auto;
  padding: 14px clamp(18px, 4vw, 36px) 24px;
  border-top: 1px solid rgba(126, 166, 214, 0.08);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.05em;
  color: var(--dim);
}

.pf-meta span:last-child {
  margin-left: auto;
}

.page-main hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 30px 0;
}

.page-stand {
  margin-top: 34px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

@media (max-width: 760px) {
  .page-nav {
    display: none;
  }
  .page-back {
    margin-left: auto;
  }
  .page-main {
    font-size: 15px;
  }
  .card-grid,
  .source-list {
    grid-template-columns: 1fr;
  }
  .fact {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .fact span {
    padding-top: 0;
  }
  .pf-meta span:last-child {
    margin-left: 0;
  }
}

@media (max-width: 420px) {
  .page-brand small {
    display: none;
  }
  .steps li {
    padding-left: 46px;
  }
}