/* ============================================================
   Encyclopedia Hub — Семейство E (Editorial Minimal)
   принципново.рф
   ============================================================ */

:root {
  /* Palette */
  --color-bg: #FAFAF7;
  --color-bg-subtle: #F2F0E8;
  --color-text: #1A1A1A;
  --color-text-muted: #5C5C5C;
  --color-accent: #7A5B3E;
  --color-accent-dark: #5C4430;
  --color-divider: #E0DED6;
  --color-quote: #3A5A3A;

  /* Fonts */
  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'PT Serif', Charter, Georgia, serif;
  --font-ui: 'Inter Tight', Inter, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Rhythm */
  --container-max: 1280px;
  --article-max: 720px;
  --toc-width: 240px;
  --px: clamp(20px, 4vw, 40px);
  --section-py: clamp(48px, 6vw, 80px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-dark); text-decoration: underline; }

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text);
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(36px, 5vw, 56px); font-weight: 500; letter-spacing: -0.01em; }
h2 { font-size: clamp(28px, 3.5vw, 36px); font-weight: 600; margin-top: 1.5em; }
h3 { font-size: clamp(20px, 2.5vw, 24px); font-weight: 600; margin-top: 1.2em; }
h4 { font-size: 18px; font-weight: 600; font-family: var(--font-ui); }
p { margin: 0 0 1.2em; }
small, .meta { font-family: var(--font-ui); font-size: 14px; color: var(--color-text-muted); }

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--px);
  padding-right: var(--px);
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-ui); font-weight: 600; color: var(--color-text); }
.brand img { height: 28px; width: auto; }
.brand span { font-size: 15px; letter-spacing: 0.02em; }
.nav {
  display: flex;
  gap: 24px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
}
.nav a {
  color: var(--color-text);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color .2s;
  text-decoration: none;
}
.nav a:hover { border-bottom-color: var(--color-accent); color: var(--color-text); }
.ext-links {
  display: flex;
  gap: 16px;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--color-text-muted);
}
.ext-links a { color: var(--color-text-muted); }
.ext-links a:hover { color: var(--color-accent); }
.search-slot { display: none; /* reserved for future search input */ }
.burger {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  color: var(--color-text);
}

@media (max-width: 900px) {
  .nav, .ext-links { display: none; }
  .burger { display: block; }
  .nav.open, .ext-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--color-bg);
    padding: 16px var(--px);
    border-bottom: 1px solid var(--color-divider);
    gap: 12px;
  }
  .ext-links.open { top: calc(64px + 200px); }
}

/* ============ BREADCRUMBS ============ */
.breadcrumbs {
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 20px 0 0;
}
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumbs li { display: inline-flex; align-items: center; }
.breadcrumbs li + li::before { content: "›"; margin: 0 8px; color: var(--color-divider); }
.breadcrumbs a { color: var(--color-text-muted); }
.breadcrumbs a:hover { color: var(--color-accent); }
.breadcrumbs [aria-current="page"] { color: var(--color-text); }

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: clamp(80px, 12vw, 160px) 0 clamp(60px, 8vw, 120px);
  overflow: hidden;
  border-bottom: 1px solid var(--color-divider);
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, #2a3524 0%, #1e2819 100%);
  z-index: -1;
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at top, rgba(255,255,255,.04), transparent 60%);
}
.hero--light .hero-bg { background: var(--color-bg-subtle); }
.hero--light { border-bottom: 1px solid var(--color-divider); }
.hero--light h1, .hero--light .hero-sub { color: var(--color-text); }
.hero h1 {
  color: #F2F0E8;
  max-width: 900px;
  margin-bottom: 24px;
}
.hero-sub {
  font-family: var(--font-ui);
  font-weight: 300;
  font-size: clamp(17px, 2vw, 22px);
  color: rgba(242, 240, 232, 0.8);
  max-width: 720px;
  line-height: 1.5;
}
.section-hero { padding: clamp(60px, 7vw, 100px) 0 clamp(40px, 5vw, 64px); background: var(--color-bg-subtle); border-bottom: 1px solid var(--color-divider); }
.section-hero .section-tag {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 12px;
}
.section-hero h1 { color: var(--color-text); max-width: 900px; }
.section-hero .lead {
  font-size: 20px;
  color: var(--color-text-muted);
  max-width: 720px;
  line-height: 1.6;
  margin-top: 16px;
}

/* ============ SECTIONS ============ */
.block { padding: var(--section-py) 0; }
.block--subtle { background: var(--color-bg-subtle); }
.block-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 8px;
}
.block-sub { color: var(--color-text-muted); margin-bottom: 40px; max-width: 720px; }

/* 4 directions cards */
.directions-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(4, 1fr);
}
.direction-card {
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  text-decoration: none;
  color: inherit;
  min-height: 220px;
}
.direction-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
  border-color: var(--color-accent);
  text-decoration: none;
}
.direction-card .icon {
  width: 40px; height: 40px;
  color: var(--color-accent);
  margin-bottom: 20px;
}
.direction-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  margin: 0 0 10px;
}
.direction-card p { font-size: 15px; color: var(--color-text-muted); line-height: 1.5; margin: 0 0 16px; flex: 1 1 auto; }
.direction-card .count { font-family: var(--font-ui); font-size: 13px; color: var(--color-accent); font-weight: 500; }

/* Article cards */
.articles-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}
.article-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  text-decoration: none;
  color: inherit;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
  border-color: var(--color-accent);
  text-decoration: none;
}
.article-card .category {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.article-card h3 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 10px;
}
.article-card .excerpt { font-size: 15px; color: var(--color-text-muted); line-height: 1.5; margin: 0 0 20px; flex: 1; }
.article-card .meta-row { font-family: var(--font-ui); font-size: 13px; color: var(--color-text-muted); display: flex; gap: 12px; }
.article-card .meta-row .dot { opacity: .4; }

.block-cta {
  text-align: center;
  margin-top: 40px;
}

/* About block */
.about-block {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: var(--section-py) 0;
}
.about-block p { font-size: 18px; color: var(--color-text-muted); }

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  padding: 14px 28px;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  background: transparent;
  border-radius: 2px;
  transition: all .2s;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--color-accent); color: #fff; text-decoration: none; }
.btn-ghost { border-color: var(--color-divider); color: var(--color-text-muted); }
.btn-ghost:hover { background: var(--color-text); border-color: var(--color-text); color: var(--color-bg); }

/* ============ ARTICLE PAGE ============ */
.article-layout {
  display: grid;
  grid-template-columns: var(--toc-width) minmax(0, var(--article-max));
  gap: 64px;
  max-width: calc(var(--toc-width) + 64px + var(--article-max));
  margin: 0 auto;
  padding: 40px var(--px) 80px;
}
.article-toc {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  font-family: var(--font-ui);
  font-size: 14px;
}
.article-toc h4 {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 16px;
}
.article-toc ol { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--color-divider); }
.article-toc li a {
  display: block;
  padding: 6px 0 6px 16px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--color-text-muted);
  line-height: 1.4;
}
.article-toc li a:hover { color: var(--color-text); }
.article-toc li a.active { color: var(--color-accent); border-left-color: var(--color-accent); }
.toc-toggle { display: none; }

.article-body { min-width: 0; }
.article-header { margin-bottom: 40px; border-bottom: 1px solid var(--color-divider); padding-bottom: 32px; }
.article-category {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
  display: block;
}
.article-header h1 { margin-bottom: 16px; }
.article-lead {
  font-size: 22px;
  line-height: 1.55;
  color: var(--color-text-muted);
  font-weight: 400;
  margin: 0 0 24px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--color-text-muted);
}
.article-meta .author { display: inline-flex; align-items: center; gap: 10px; }
.article-meta .author img { width: 32px; height: 32px; border-radius: 50%; background: var(--color-bg-subtle); object-fit: cover; }
.article-meta .dot { opacity: 0.4; }

/* Article body typography */
.article-body h2 { margin-top: 2em; scroll-margin-top: 90px; }
.article-body h3 { margin-top: 1.5em; scroll-margin-top: 90px; }
.article-body p, .article-body ul, .article-body ol { font-size: 19px; line-height: 1.7; }
.article-body ul, .article-body ol { padding-left: 24px; }
.article-body li { margin: 10px 0; }
.article-body img { margin: 32px 0 12px; border-radius: 2px; }
.article-body figure { margin: 32px 0; }
.article-body figcaption { font-family: var(--font-ui); font-size: 14px; color: var(--color-text-muted); font-style: italic; text-align: center; margin-top: 10px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 32px 0; font-size: 16px; }
.article-body th, .article-body td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--color-divider); }
.article-body th { font-family: var(--font-ui); font-weight: 600; background: var(--color-bg-subtle); }
.article-body blockquote {
  margin: 32px 0;
  padding: 16px 0 16px 24px;
  border-left: 3px solid var(--color-accent);
  font-style: italic;
  font-size: 22px;
  color: var(--color-text);
}

/* Pull quote / Зелёная Матрёшка */
.zm-quote {
  background: var(--color-bg-subtle);
  border-left: 3px solid var(--color-quote);
  padding: 32px;
  margin: 40px 0;
}
.zm-quote .label {
  display: block;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}
.zm-quote p {
  font-style: italic;
  font-size: 22px;
  line-height: 1.5;
  color: var(--color-quote);
  margin: 0;
}

/* Plant card embedded */
.plant-card {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-divider);
  padding: 20px;
  margin: 32px 0;
  align-items: center;
}
.plant-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; background: var(--color-divider); }
.plant-card .name { font-family: var(--font-heading); font-size: 22px; font-weight: 600; margin: 0 0 4px; }
.plant-card .latin { font-family: var(--font-body); font-style: italic; color: var(--color-text-muted); font-size: 15px; margin: 0 0 12px; }
.plant-card .specs { font-family: var(--font-ui); font-size: 14px; color: var(--color-text-muted); display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.plant-card .price { font-family: var(--font-ui); font-size: 15px; color: var(--color-accent); font-weight: 600; margin-bottom: 12px; }
.plant-card .cta-link { font-family: var(--font-ui); font-size: 14px; font-weight: 500; }
.plant-card .missing { color: var(--color-text-muted); font-style: italic; padding: 20px; grid-column: 1 / -1; text-align: center; }

@media (max-width: 640px) {
  .plant-card { grid-template-columns: 1fr; }
  .plant-card img { max-width: 240px; margin: 0 auto; }
}

/* FAQ */
.faq { margin: 48px 0; }
.faq-item { border-bottom: 1px solid var(--color-divider); }
.faq-item:first-child { border-top: 1px solid var(--color-divider); }
.faq-q {
  width: 100%;
  background: none;
  border: 0;
  padding: 20px 0;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-q::after { content: "+"; font-family: var(--font-ui); font-size: 22px; color: var(--color-accent); transition: transform .2s; }
.faq-q[aria-expanded="true"]::after { content: "−"; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; font-size: 17px; color: var(--color-text-muted); line-height: 1.7; }
.faq-a > div { padding: 0 0 20px; }

/* Article CTA */
.article-cta {
  margin: 56px 0 40px;
  padding: 32px;
  background: var(--color-bg-subtle);
  border-left: 3px solid var(--color-accent);
  text-align: left;
}
.article-cta h3 { font-family: var(--font-heading); font-size: 22px; margin: 0 0 8px; }
.article-cta p { color: var(--color-text-muted); margin: 0 0 16px; }

/* Related */
.related {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-divider);
}
.related h3 { font-family: var(--font-ui); font-size: 14px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-muted); margin: 0 0 20px; }
.related-grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }

/* ============ FOOTER ============ */
.site-footer {
  background: var(--color-bg-subtle);
  border-top: 1px solid var(--color-divider);
  padding: 60px 0 32px;
  margin-top: 80px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}
.footer-cols h5 {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin: 0 0 16px;
}
.footer-cols ul { list-style: none; padding: 0; margin: 0; font-family: var(--font-ui); font-size: 14px; }
.footer-cols li { margin-bottom: 8px; }
.footer-cols a { color: var(--color-text); }
.footer-cols a:hover { color: var(--color-accent); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-divider);
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px) {
  .article-layout { grid-template-columns: 1fr; max-width: 720px; gap: 24px; padding: 24px var(--px) 64px; }
  .article-toc { position: static; max-height: none; margin-bottom: 16px; }
  .toc-toggle {
    display: block;
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-divider);
    padding: 12px 16px;
    width: 100%;
    font-family: var(--font-ui);
    font-size: 14px;
    text-align: left;
    cursor: pointer;
  }
  .article-toc ol { display: none; padding: 16px; background: var(--color-bg-subtle); margin-top: 0; border-left: 0; }
  .article-toc.open ol { display: block; }
}
@media (max-width: 900px) {
  .directions-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .directions-grid, .articles-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  body { font-size: 17px; }
  .article-body p, .article-body ul, .article-body ol { font-size: 18px; }
}

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}