/* ============================================
   Прорыв — стиль для сайта
   ============================================ */

:root {
  --bg: #f6f2eb;
  --bg-card: #fffefb;
  --text: #1f1c18;
  --text-muted: #6b6661;
  --accent: #b04a2e;
  --accent-soft: #fff3e8;
  --border: #d8d1c4;
  --highlight: #fff8e8;
  --code-bg: #ece7dc;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, 'Times New Roman', 'Charter', serif;
  font-size: 1rem;
  line-height: 1.75;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */

.site {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem;
  width: 100%;
}

.container--wide {
  max-width: 960px;
}

/* Top bar */

.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
}

.topbar a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.topbar__brand {
  font-weight: 600;
  color: var(--text) !important;
  letter-spacing: 0.02em;
}

/* Header / hero */

.hero {
  padding: 2rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.hero__title {
  font-size: 2.5rem;
  line-height: 1.15;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 0;
  font-style: italic;
  max-width: 38em;
}

/* Thinker header */

.thinker-header {
  padding: 2rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.thinker-header__name {
  font-size: 2.25rem;
  line-height: 1.15;
  margin: 0 0 0.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.thinker-header__years {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 1.5rem;
}

/* Lesson callout */

.lesson {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 0;
  font-size: 1.05rem;
  line-height: 1.6;
  border-radius: 0 4px 4px 0;
}

.lesson__label {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0 0 0.4rem;
}

.lesson p {
  margin: 0;
}

/* Sections */

.section {
  margin: 2.5rem 0;
}

.section__title {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--text);
}

/* Steps (логическая цепочка) */

.steps {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 0.6rem 0 0.6rem 3rem;
  border-left: 1px solid var(--border);
  margin-left: 0.9rem;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -1.05rem;
  top: 0.6rem;
  width: 1.9rem;
  height: 1.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.steps li:last-child {
  border-left-color: transparent;
}

/* Lists */

ul, ol {
  padding-left: 1.4rem;
}

ul li, ol li {
  margin-bottom: 0.5rem;
}

/* Cards (for index page) */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  display: block;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(176, 74, 46, 0.08);
}

.card__name {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--text);
}

.card__years {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.card__lesson {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
  margin: 0;
  line-height: 1.5;
}

/* Related links (связанные) */

.related {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.related li {
  margin: 0;
}

.related a {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s ease;
}

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

/* Bottom navigation */

.thinker-nav {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
}

.thinker-nav a {
  text-decoration: none;
  color: var(--text-muted);
  padding: 0.5rem 0;
  display: block;
}

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

.thinker-nav__prev {
  text-align: left;
}

.thinker-nav__next {
  text-align: right;
}

.thinker-nav__label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
  opacity: 0.7;
}

.thinker-nav__name {
  display: block;
  color: var(--text);
  font-weight: 500;
}

.thinker-nav__center {
  text-align: center;
}

.thinker-nav__center a {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* Patterns block (on index) */

.patterns {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2rem;
  margin: 3rem 0;
}

.patterns__title {
  font-size: 1.3rem;
  margin: 0 0 1.25rem;
  font-weight: 700;
}

.patterns ul {
  margin: 0;
  padding-left: 1.2rem;
}

.patterns li {
  margin-bottom: 0.5rem;
}

.patterns strong {
  color: var(--accent);
  font-weight: 600;
}

/* Emphasis */

em {
  font-style: italic;
  color: var(--text);
}

strong {
  font-weight: 700;
}

/* Mobile */

@media (max-width: 600px) {
  html { font-size: 16px; }
  .container { padding: 2rem 1.25rem; }
  .hero__title { font-size: 2rem; }
  .thinker-header__name { font-size: 1.75rem; }
  .cards { grid-template-columns: 1fr; }
  .thinker-nav { grid-template-columns: 1fr; gap: 0.75rem; }
  .thinker-nav__next { text-align: left; }
  .thinker-nav__center { text-align: left; }
}

/* Print */

@media print {
  .topbar, .thinker-nav { display: none; }
  body { background: white; }
}