/* lazuko.ru — static personal site (light default) */
:root {
  --bg: #f6f7fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: rgba(15, 23, 42, 0.1);
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #9a7b1a;
  --accent-hover: #7a6214;
  --accent-soft: rgba(154, 123, 26, 0.12);
  --accent-2: #2563eb;
  --radius: 12px;
  --radius-lg: 20px;
  --font: "Onest", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
  --header-bg: rgba(246, 247, 251, 0.9);
  --gradient-1: rgba(37, 99, 235, 0.06);
  --gradient-2: rgba(154, 123, 26, 0.06);
  --card-hover-border: rgba(154, 123, 26, 0.35);
  --max: 1120px;
  --header-h: 72px;
}

[data-theme="dark"] {
  --bg: #0c0f14;
  --bg-elevated: #141a24;
  --bg-card: #1a2230;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf4;
  --text-muted: #94a3b8;
  --accent: #c9a227;
  --accent-hover: #e4c04a;
  --accent-soft: rgba(201, 162, 39, 0.15);
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  --header-bg: rgba(12, 15, 20, 0.85);
  --gradient-1: rgba(59, 130, 246, 0.12);
  --gradient-2: rgba(201, 162, 39, 0.08);
  --card-hover-border: rgba(201, 162, 39, 0.3);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--gradient-1), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, var(--gradient-2), transparent);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s, opacity 0.2s;
}

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  padding: 0.5rem 0.65rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  line-height: 1;
  text-decoration: none;
}

.lang-switch:hover {
  border-color: var(--card-hover-border);
  color: var(--text);
}

.lang-flag {
  font-size: 1.15rem;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--text);
}

.nav-toggle,
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: border-color 0.2s, background 0.2s;
}

.theme-toggle:hover,
.nav-toggle:hover {
  border-color: var(--card-hover-border);
}

.theme-toggle {
  font-size: 1.15rem;
}

.nav-toggle {
  display: none;
  font-size: 1.25rem;
}

/* Hero */
.hero {
  padding: calc(var(--header-h) + 4rem) 0 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

.hero .lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 36em;
}

.hero-photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 1;
  object-fit: cover;
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 0.5rem;
  font-weight: 600;
}

section h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin: 0 0 2rem;
  letter-spacing: -0.02em;
}

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

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

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.card .meta {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

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

.card-links {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}

/* Timeline / list */
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.fact {
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border);
}

.fact strong {
  display: block;
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.fact span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Software registry list */
.software-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.software-list li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.software-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.25rem 1.5rem;
  color: inherit;
  background: var(--bg-card);
  transition: background 0.2s;
}

.software-list a:hover {
  background: var(--bg-elevated);
  color: inherit;
}

.software-list .reg {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
}

.software-list .arrow {
  color: var(--text-muted);
  font-size: 1.25rem;
}

/* Software detail pages */
.doc-page {
  padding-top: calc(var(--header-h) + 2rem);
  padding-bottom: 4rem;
}

.doc-page h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 0.5rem;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.doc-meta code {
  font-family: var(--font-mono);
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.doc-nav {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
}

.doc-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.doc-nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.doc-nav a:hover {
  color: var(--accent);
}

.doc-section {
  margin-bottom: 2.5rem;
}

.doc-section h2 {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.doc-section h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--text);
}

.doc-section p,
.doc-section li {
  color: var(--text-muted);
}

.doc-section ul,
.doc-section ol {
  padding-left: 1.25rem;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 1rem 0;
}

.doc-table th,
.doc-table td {
  border: 1px solid var(--border);
  padding: 0.65rem 1rem;
  text-align: left;
}

.doc-table th {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 600;
}

.doc-table td {
  color: var(--text-muted);
}

.note {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.note p {
  margin: 0;
  color: var(--text);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.contact-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.contact-item strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Two-column activity row (ВШЭ + Акродис) */
.split-sections {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.split-sections .block-head {
  margin-bottom: 1.25rem;
}

.split-sections .block-head h2 {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .split-sections {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-photo {
    max-width: 220px;
    margin: 0 auto;
    order: -1;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-elevated);
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav.open {
    display: flex;
  }

  .site-header .container {
    flex-wrap: wrap;
  }

  .header-actions,
  .product-header .header-end {
    order: 2;
    margin-left: auto;
  }

  .nav-toggle {
    display: block;
  }
}

@media print {
  .site-header,
  .nav-toggle,
  .theme-toggle,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .doc-section {
    break-inside: avoid;
  }
}