/* === claude-blog: theme.css ===
   Базовые токены + reset + типографика.
   HSL палитра для матча с claude.ai-platform.space landing.
*/

:root {
  /* Палитра — dark по умолчанию */
  --bg-primary: hsl(220, 20%, 5%);
  --bg-card: hsl(220, 18%, 8%);
  --bg-elevated: hsl(220, 16%, 11%);

  --text-primary: hsla(220, 20%, 96%, 0.95);
  --text-secondary: hsla(220, 15%, 70%, 0.85);
  --text-muted: hsla(220, 10%, 50%, 0.7);

  --color-primary: hsl(152, 69%, 45%);
  --color-primary-hover: hsl(152, 65%, 38%);
  --color-primary-soft: hsla(152, 69%, 45%, 0.12);

  --border: hsla(220, 20%, 96%, 0.08);
  --border-strong: hsla(220, 20%, 96%, 0.16);

  --shadow-sm: 0 1px 2px hsla(220, 30%, 0%, 0.4);
  --shadow-md: 0 8px 24px hsla(220, 30%, 0%, 0.4);
  --shadow-glow: 0 0 60px hsla(152, 69%, 45%, 0.12);

  /* Типографика */
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  /* Размеры */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Easing */
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.5, 1.6, 0.4, 1);

  /* Контейнеры */
  --container-max: 1200px;
  --content-narrow: 720px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, picture, svg, video { max-width: 100%; height: auto; display: block; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { padding-inline-start: 1.25em; }
code, pre, kbd { font-family: var(--font-mono); }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
}

/* Skip link для accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--color-primary);
  color: hsl(220, 20%, 5%);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: 12px; }

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

.content-narrow {
  max-width: var(--content-narrow);
}

/* Reading progress */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--color-primary);
  z-index: 50;
  transition: width 0.1s linear;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: hsla(220, 20%, 5%, 0.85);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.hdr-container {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
}
.brand-name { letter-spacing: -0.01em; }
.brand:hover { color: var(--color-primary); }
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-inline-start: auto;
}
.nav-link {
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover {
  color: var(--text-primary);
  background: var(--border);
}
.nav-link-ext { color: var(--color-primary); }
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all 0.2s var(--ease-out-quart);
}
.icon-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

/* Hero */
.hero {
  position: relative;
  padding: clamp(56px, 10vw, 120px) 0 clamp(48px, 8vw, 80px);
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 920px;
}
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}
.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, hsla(152, 69%, 45%, 0.4), transparent 70%);
  top: -200px;
  left: -100px;
}
.hero-orb-2 {
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, hsla(200, 80%, 50%, 0.18), transparent 70%);
  bottom: -120px;
  right: -80px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  background: var(--bg-card);
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}
.dot-live {
  box-shadow: 0 0 0 0 hsla(152, 69%, 45%, 0.6);
  animation: pulse 2s var(--ease-out-quart) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 hsla(152, 69%, 45%, 0.6); }
  100% { box-shadow: 0 0 0 8px hsla(152, 69%, 45%, 0); }
}
.hero-title {
  font-size: clamp(32px, 5.5vw, 60px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0 0 24px;
}
.hero-line {
  display: block;
  color: var(--text-primary);
}
.hero-accent {
  display: block;
  background: linear-gradient(135deg, var(--color-primary) 0%, hsl(180, 70%, 55%) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 0 32px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
}
.meta-item kbd {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--color-primary);
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 500;
  margin-inline-end: 4px;
}

/* Section heading */
.section-h {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}
.section-h-pre {
  color: var(--color-primary);
}

/* Footer */
.site-footer {
  margin-top: clamp(64px, 10vw, 120px);
  padding: clamp(48px, 6vw, 80px) 0 32px;
  border-top: 1px solid var(--border);
  background: linear-gradient(to bottom, var(--bg-primary), hsla(152, 69%, 45%, 0.02));
}
.ftr-container {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-bottom: 48px;
}
.ftr-brand .brand { margin-bottom: 12px; font-size: 16px; }
.ftr-tag {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 280px;
  margin: 0;
}
.ftr-h {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 16px;
  font-weight: 500;
}
.ftr-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.ftr-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.ftr-links a:hover { color: var(--color-primary); }
.ftr-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.ftr-bottom p { margin: 0; }

/* Page head (default template) */
.page-head {
  padding: clamp(40px, 6vw, 64px) 0 clamp(24px, 4vw, 32px);
}
.page-title {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  font-weight: 700;
}
.page-lead {
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--text-secondary);
  margin: 0;
  max-width: 640px;
}

/* Прозрачные ссылки в prose */
.prose a {
  color: var(--color-primary);
  border-bottom: 1px solid hsla(152, 69%, 45%, 0.3);
  transition: border-color 0.2s, color 0.2s;
}
.prose a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: var(--color-primary);
}

@media (max-width: 768px) {
  .ftr-container { grid-template-columns: 1fr 1fr; }
  .site-nav { display: none; }
  .hdr-container { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}