:root {
  /* Палитра "Сырок с ванильным вкусом" · 60-30-10 */
  --bg: #FAF8F3;
  --text-primary: #3A3530;
  --text-secondary: #8A8279;
  --text-facts: #6A6560;
  --accent: #B8956A;
  --accent-hover: #A07D52;
  --hairline: rgba(58, 53, 48, 0.10);
  --nav-scrolled-bg: rgba(250, 248, 243, 0.92);

  /* Типографика */
  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  /* Отступы (кратно 8px) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;
}

/* === ТЁМНАЯ ТЕМА === */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #2A2520;
    --text-primary: #E8E3DC;
    --text-secondary: #A39B8F;
    --text-facts: #B8B0A3;
    --accent: #D4B896;
    --accent-hover: #E0C4A0;
    --hairline: rgba(232, 227, 220, 0.10);
    --nav-scrolled-bg: rgba(42, 37, 32, 0.92);
  }
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Текстура бумаги */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.025;
  pointer-events: none;
  z-index: 1;
}

@media (prefers-color-scheme: dark) {
  body::before { opacity: 0.015; }
}

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
}

/* === ШАПКА === */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease, padding 0.4s ease, border-bottom-color 0.4s ease;
}

nav.scrolled {
  background: var(--nav-scrolled-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--space-sm) 0;
  border-bottom-color: var(--hairline);
}

/* Индикатор прогресса чтения */
nav::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, rgba(184,149,106,0), var(--accent), rgba(184,149,106,0));
  transform: scaleX(var(--progress, 0));
  transform-origin: left center;
  opacity: 0.85;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* === HERO === */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-md) var(--space-2xl);
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 640px;
  margin: 0 auto;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.1s forwards;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.2s forwards;
}

.hero-facts {
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-facts);
  margin-bottom: var(--space-xl);
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.3s forwards;
}

.hero-facts span:not(:last-child)::after {
  content: "·";
  margin-left: var(--space-sm);
  color: var(--accent);
}

/* Кнопка с анимацией заполнения */
.btn {
  position: relative;
  isolation: isolate;
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-decoration: none;
  overflow: hidden;
  transition: color 0.4s ease, border-color 0.4s ease;
  background: transparent;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
  transform: translateY(101%);
  transition: transform 0.5s var(--ease);
}

.btn:hover {
  color: var(--bg);
  border-color: var(--accent-hover);
}

.btn:hover::before {
  transform: translateY(0);
}

.hero .btn {
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.4s forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === СЕКЦИЯ "ЧЕТЫРЕ СЛОВА" === */
.pillars-section {
  padding: var(--space-2xl) var(--space-md);
  position: relative;
  z-index: 2;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  line-height: 1.2;
  text-align: center;
  letter-spacing: -0.02em;
}

.section-intro {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-style: italic;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.6;
  margin: 0 auto var(--space-xl);
  text-align: center;
}

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  max-width: 960px;
  margin: 0 auto;
}

.pillar-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.pillar-text {
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* === СЕКЦИЯ "ВХОД" === */
.entry-section {
  padding: var(--space-2xl) var(--space-md);
  position: relative;
  z-index: 2;
}

.entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  max-width: 960px;
  margin: 0 auto var(--space-xl);
}

.entry-step {
  display: flex;
  flex-direction: column;
}

.entry-number {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--accent);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.entry-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.entry-text {
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.entry-note {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto var(--space-lg);
  text-align: center;
  line-height: 1.6;
}

.entry-cta {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.entry-contacts {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.entry-contacts p {
  margin-bottom: var(--space-sm);
}

.entry-contacts a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: color 0.3s ease, border-color 0.3s ease;
}

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

/* === ФУТЕР === */
.footer {
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  position: relative;
  z-index: 2;
}

.footer-line {
  width: 32px;
  height: 1px;
  background: var(--accent);
  opacity: 0.2;
  margin: 0 auto var(--space-xl);
}

.footer-content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.footer-axolotl {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-lg);
  opacity: 0.6;
  object-fit: contain;
}

.footer-phrase {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.footer-copyright {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.footer-disclaimer {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 480px;
  margin: 0 auto;
}

/* === ПЛАВНОЕ ПОЯВЛЕНИЕ === */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === АДАПТИВ === */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { padding: 100px var(--space-sm) var(--space-xl); }
  .hero-facts {
    flex-direction: column;
    gap: var(--space-xs);
  }
  .hero-facts span:not(:last-child)::after {
    content: none;
  }
  .hero .btn,
  .entry-cta .btn {
    width: 100%;
    text-align: center;
  }
  .pillars-grid,
  .entry-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .pillars-section,
  .entry-section {
    padding: var(--space-xl) var(--space-sm);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-title,
  .hero-tagline,
  .hero-facts,
  .hero .btn {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}