@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Geist:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #08090b;
  --bg-raised: #0f1013;
  --bg-elev: #15161b;
  --border: #1a1b20;
  --border-hi: #25262d;
  --fg: #e6e6e8;
  --fg-2: #a6a6ac;
  --fg-3: #6a6a72;
  --fg-4: #3f404a;
  --accent: #d4a574;
  --accent-hi: #edbf88;
  --accent-dim: rgba(212,165,116,0.08);
  --good: #7cc98f;
  --warn: #e5b874;
  --bad: #e47a7a;

  --serif: 'Instrument Serif', 'Charter', 'Iowan Old Style', Georgia, serif;
  --sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --hairline: 1px solid var(--border);
  --hairline-hi: 1px solid var(--border-hi);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { background: var(--bg); font-size: 15px; }

body {
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.58;
  font-weight: 400;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11', 'kern';
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 1200px 500px at 50% -240px, rgba(212,165,116,0.035), transparent 70%),
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.012) 1px, transparent 0);
  background-size: auto, 22px 22px;
  background-attachment: fixed;
  background-repeat: no-repeat, repeat;
}

/* --- Top bar --- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 28px;
  border-bottom: var(--hairline);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(8,9,11,0.78);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
}
.topbar .brand {
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 500;
}
.topbar .brand .dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent), 0 0 3px var(--accent-hi);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}
.topbar nav { display: flex; gap: 22px; }
.topbar nav a {
  color: var(--fg-3);
  text-decoration: none;
  transition: color 0.15s;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}
.topbar nav a:hover { color: var(--fg); }
.topbar nav a.active { color: var(--fg); border-bottom-color: var(--accent); }

/* --- Container --- */
.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 52px 28px 90px;
}

/* --- Page header --- */
header.page-header {
  margin-bottom: 44px;
  padding-bottom: 24px;
  border-bottom: var(--hairline);
}

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.kicker::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

header.page-header h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.018em;
  margin-bottom: 14px;
  color: var(--fg);
}
header.page-header h1 em { font-style: italic; color: var(--accent-hi); }

header.page-header .meta {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-3);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  letter-spacing: 0.02em;
}
header.page-header .meta a {
  color: var(--fg-2);
  text-decoration: none;
  padding: 4px 9px;
  border: var(--hairline-hi);
  border-radius: 3px;
  transition: all 0.15s;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
header.page-header .meta a:hover { color: var(--fg); border-color: var(--accent); background: var(--accent-dim); }
header.page-header .meta .sep { color: var(--fg-4); }
header.page-header .back { color: var(--fg-3); text-decoration: none; }
header.page-header .back:hover { color: var(--accent); }

/* --- Body text --- */
p { color: var(--fg); margin: 10px 0; }
p:first-child { margin-top: 0; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s, background 0.15s; }
a:hover { color: var(--accent-hi); }

em, i { font-family: var(--serif); font-style: italic; font-size: 1.04em; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  padding: 2px 6px;
  background: var(--bg-raised);
  border: var(--hairline);
  border-radius: 3px;
  color: var(--accent-hi);
}
pre {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 14px 16px;
  background: var(--bg-raised);
  border: var(--hairline);
  border-radius: 5px;
  overflow-x: auto;
  margin: 14px 0;
  line-height: 1.5;
}
pre code { background: none; padding: 0; border: 0; color: var(--fg); font-size: 1em; }

strong, b { font-weight: 600; color: var(--fg); }

/* --- Section headers (h2 / h3) --- */
h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-top: 44px;
  margin-bottom: 14px;
  color: var(--fg);
  padding-top: 4px;
  position: relative;
}
h2::after {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--accent);
  margin-top: 8px;
  opacity: 0.6;
}

h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.003em;
  margin-top: 18px;
  margin-bottom: 8px;
  color: var(--fg);
}
h3.numbered {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  padding-left: 44px;
  position: relative;
  margin-top: 28px;
  margin-bottom: 10px;
  color: var(--fg);
}
h3.numbered::before {
  content: attr(data-n);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 28px;
  color: var(--fg-3);
  letter-spacing: -0.02em;
  line-height: 1;
}

/* --- Cards --- */
.card {
  background: var(--bg-raised);
  border: var(--hairline);
  border-radius: 5px;
  padding: 14px 16px 14px 18px;
  margin: 10px 0;
  position: relative;
  overflow: hidden;
  transition: border-color 0.15s, background 0.15s;
}
.card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--border-hi);
  transition: background 0.15s;
}
.card:hover { border-color: var(--border-hi); }
.card.warn::before { background: var(--warn); box-shadow: 0 0 14px rgba(229,184,116,0.35); }
.card.good::before { background: var(--good); box-shadow: 0 0 14px rgba(124,201,143,0.25); }
.card.bad::before  { background: var(--bad);  box-shadow: 0 0 14px rgba(228,122,122,0.28); }
.card h3 { margin-top: 0; }
.card p { color: var(--fg); line-height: 1.55; }
.card p + p { margin-top: 6px; }

.card .hint {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  display: inline-block;
  margin-bottom: 6px;
}

/* --- Metrics (inline chips) --- */
.metric {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  padding: 2px 7px;
  border: 1px solid var(--border-hi);
  border-radius: 3px;
  color: var(--fg);
  margin: 0 3px 2px 0;
  letter-spacing: -0.005em;
  background: rgba(255,255,255,0.02);
  vertical-align: baseline;
  line-height: 1.5;
}
.metric.up { color: var(--good); border-color: rgba(124,201,143,0.4); }
.metric.down { color: var(--bad); border-color: rgba(228,122,122,0.4); }

/* --- KPI grid --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1px;
  background: var(--border);
  border: var(--hairline);
  border-radius: 6px;
  overflow: hidden;
  margin: 0 0 28px;
}
.kpi {
  background: var(--bg-raised);
  padding: 14px 16px 15px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-height: 78px;
  transition: background 0.15s;
}
.kpi:hover { background: var(--bg-elev); }
.kpi .kpi-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.kpi .kpi-value {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1;
  color: var(--fg);
  letter-spacing: -0.015em;
  font-variant-numeric: tabular-nums;
}
.kpi .kpi-value.neg { color: var(--bad); }
.kpi .kpi-value.pos { color: var(--good); }
.kpi .kpi-value .unit {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--fg-3);
  margin-left: 3px;
  font-weight: 400;
}
.kpi .kpi-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.01em;
}

/* --- Index list --- */
ul.index-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  border-top: var(--hairline);
}
ul.index-list li {
  padding: 20px 4px;
  border-bottom: var(--hairline);
  display: grid;
  grid-template-columns: 12px 1fr auto;
  column-gap: 20px;
  row-gap: 5px;
  align-items: baseline;
  transition: background 0.2s, padding-left 0.2s;
  position: relative;
}
ul.index-list li::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--fg-4);
  border-radius: 50%;
  grid-row: 1;
  grid-column: 1;
  margin-top: 8px;
  transition: background 0.2s, box-shadow 0.2s;
}
ul.index-list li:hover { background: var(--accent-dim); padding-left: 10px; }
ul.index-list li:hover::before { background: var(--accent); box-shadow: 0 0 10px var(--accent); }
ul.index-list li a {
  font-family: var(--serif);
  font-size: 21px;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.008em;
  line-height: 1.25;
  grid-row: 1;
  grid-column: 2;
}
ul.index-list li a:hover { color: var(--accent-hi); }
ul.index-list li .preview {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--fg-3);
  grid-row: 2;
  grid-column: 2;
  line-height: 1.5;
}
ul.index-list li .date {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-3);
  text-align: right;
  letter-spacing: 0.02em;
  white-space: nowrap;
  grid-row: 1;
  grid-column: 3;
  padding-top: 4px;
}

/* --- Tabs --- */
nav.tabs {
  display: inline-flex;
  gap: 2px;
  margin: 24px 0 30px;
  padding: 4px;
  background: var(--bg-raised);
  border: var(--hairline);
  border-radius: 6px;
}
nav.tabs a {
  color: var(--fg-3);
  text-decoration: none;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 4px;
  transition: all 0.15s;
  letter-spacing: -0.003em;
}
nav.tabs a:hover { color: var(--fg); background: rgba(255,255,255,0.03); }
nav.tabs a.active { color: var(--bg); background: var(--accent); }
nav.tabs a.active:hover { background: var(--accent-hi); }

/* --- Callouts / blockquote / →Нам / 👉 --- */
blockquote {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--fg);
  background: var(--accent-dim);
  border-left: 2px solid var(--accent);
  padding: 10px 14px;
  margin: 10px 0;
  border-radius: 0 4px 4px 0;
  line-height: 1.55;
}
blockquote strong { color: var(--accent); font-weight: 500; }

/* --- Bullet list --- */
ul.bullets {
  list-style: none;
  padding: 0;
  margin: 8px 0;
}
ul.bullets li {
  position: relative;
  padding-left: 18px;
  margin: 4px 0;
  color: var(--fg);
  line-height: 1.55;
}
ul.bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--fg-4);
  font-family: var(--mono);
  font-size: 0.9em;
  top: 1px;
}

/* --- Footer --- */
footer.page-footer {
  margin-top: 72px;
  padding-top: 20px;
  border-top: var(--hairline);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.03em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
footer.page-footer a { color: var(--fg-3); }
footer.page-footer a:hover { color: var(--accent); }

/* --- Fade-in stagger --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.container > * { animation: fadeUp 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) backwards; }
.container > *:nth-child(1) { animation-delay: 0.05s; }
.container > *:nth-child(2) { animation-delay: 0.11s; }
.container > *:nth-child(3) { animation-delay: 0.17s; }
.container > *:nth-child(4) { animation-delay: 0.23s; }
.container > *:nth-child(5) { animation-delay: 0.29s; }
.container > *:nth-child(6) { animation-delay: 0.35s; }
.container > *:nth-child(7) { animation-delay: 0.41s; }
.container > *:nth-child(8) { animation-delay: 0.46s; }
.container > *:nth-child(9) { animation-delay: 0.51s; }
.container > *:nth-child(10) { animation-delay: 0.56s; }

/* --- Responsive --- */
@media (max-width: 640px) {
  html { font-size: 14.5px; }
  .container { padding: 32px 18px 60px; }
  .topbar { padding: 11px 18px; font-size: 10.5px; }
  .topbar nav { gap: 14px; }
  header.page-header h1 { font-size: 34px; }
  h2 { font-size: 22px; margin-top: 36px; }
  h3.numbered { padding-left: 38px; font-size: 19px; }
  h3.numbered::before { font-size: 24px; }
  ul.index-list li {
    grid-template-columns: 12px 1fr;
    row-gap: 4px;
  }
  ul.index-list li .date {
    grid-row: 2;
    grid-column: 2;
    text-align: left;
    padding-top: 0;
  }
  ul.index-list li .preview {
    grid-row: 3;
    grid-column: 2;
  }
  ul.index-list li a { font-size: 18px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi .kpi-value { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .container > * { animation: none; }
  .topbar .brand .dot { animation: none; }
}

/* Selection */
::selection { background: var(--accent); color: var(--bg); }

/* Scrollbar (webkit) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 5px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--fg-4); }