/* ============================================
   SATTILIK INVEST HOLDING — Дизайн-система
   ============================================ */

/* ---- CSS-переменные: палитра, типографика ---- */
:root {
  /* Основная палитра */
  --color-bg-primary: #0A1628;       /* Глубокий тёмно-синий — фон */
  --color-bg-secondary: #0F2849;     /* Вторичный синий — секции */
  --color-bg-tertiary: #1A2B42;      /* Третичный — карточки */

  --color-gold: #C9A961;             /* Золотой — акцент */
  --color-gold-light: #D4B876;       /* Светлый золотой — hover */
  --color-gold-dark: #B8954A;        /* Тёмный золотой */

  --color-text-primary: #F5F2ED;     /* Кремовый — основной текст */
  --color-text-secondary: #A8B5C7;   /* Приглушённый — второстепенный */
  --color-text-muted: #6B7A92;       /* Сильно приглушённый — мета */

  --color-border: rgba(201, 169, 97, 0.15);
  --color-border-strong: rgba(201, 169, 97, 0.35);

  /* Типографика */
  --font-heading: 'Manrope', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* Размеры */
  --container-max: 1240px;
  --container-narrow: 880px;
  --section-padding: clamp(60px, 8vw, 120px);

  /* Радиусы и тени */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-gold: 0 4px 24px rgba(201, 169, 97, 0.15);

  /* Анимации */
  --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Сброс и базовые стили ---- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
}

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

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-base);
}
a:hover { color: var(--color-gold-light); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--color-text-primary);
}

h1 { font-size: clamp(2rem, 4.5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin: 0 0 1em; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---- Декоративные элементы ---- */
.gold-line {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  margin: 0 0 24px;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 16px;
  display: inline-block;
}

/* ---- Кнопки ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-bg-primary);
  border-color: var(--color-gold);
}
.btn-primary:hover {
  background: var(--color-gold-light);
  border-color: var(--color-gold-light);
  color: var(--color-bg-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}
.btn-outline:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 10px 0;
}
.btn-ghost:hover { color: var(--color-gold); }

/* ---- Шапка ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 18px 0;
}

.header-logo {
  flex-shrink: 0;
}
.header-logo img {
  height: 44px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
}
.main-nav a:hover { color: var(--color-gold); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.lang-switcher a {
  padding: 6px 8px;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}
.lang-switcher a:hover { color: var(--color-text-primary); }
.lang-switcher a.active {
  color: var(--color-gold);
  background: rgba(201, 169, 97, 0.08);
}

/* Мобильное меню */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-text-primary);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  padding: clamp(80px, 12vw, 160px) 0 clamp(60px, 8vw, 120px);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.08), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -300px; left: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(15, 40, 73, 0.6), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
}

.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 4rem);
  margin-bottom: 32px;
}

.hero-lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.65;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* Hero — статистические маркеры */
.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-top: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.hero-meta-item .label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.hero-meta-item .value {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* ---- Секции ---- */
section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-alt {
  background: var(--color-bg-secondary);
}

.section-header {
  max-width: 720px;
  margin-bottom: 64px;
}

.section-header h2 {
  margin-bottom: 20px;
}

.section-header .lead {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ---- Секция: Методология SLAE ---- */
.slae-tiers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.tier-card {
  padding: 36px 32px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.tier-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--color-gold);
  transition: width 400ms ease;
}

.tier-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-4px);
}
.tier-card:hover::before { width: 100%; }

.tier-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-gold);
  background: rgba(201, 169, 97, 0.08);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.tier-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.tier-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin: 0;
}

/* ---- Секция: О компании ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-facts {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.fact-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.fact-row .label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.fact-row .value {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
}

/* ---- Секция: Проект SLAE-001 ---- */
.project-card {
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: clamp(40px, 5vw, 64px);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(201, 169, 97, 0.06), transparent 70%);
  pointer-events: none;
}

.project-id {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.project-card h2 {
  margin-bottom: 24px;
  max-width: 720px;
}

.project-card .description {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 760px;
  margin-bottom: 32px;
}

.project-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin: 48px 0;
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-block .stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.stat-block .stat-value {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-gold);
  line-height: 1.2;
}

.stat-block .stat-note {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* ---- Партнёрство ---- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.partner-tile {
  padding: 28px 24px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: left;
  transition: all var(--transition-base);
}

.partner-tile:hover {
  border-color: var(--color-border-strong);
  background: var(--color-bg-secondary);
}

.partner-tile h4 {
  margin: 0 0 8px;
  color: var(--color-gold);
  font-size: 1rem;
  font-family: var(--font-heading);
}

.partner-tile p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ---- Контактная секция ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-info-block {
  margin-bottom: 32px;
}

.contact-info-block .label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  display: block;
}

.contact-info-block .value {
  font-size: 1.0625rem;
  color: var(--color-text-primary);
}

.contact-info-block a {
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-strong);
  transition: all var(--transition-base);
  padding-bottom: 2px;
}
.contact-info-block a:hover {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

/* Форма обратной связи */
.contact-form {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
}

.form-field {
  margin-bottom: 20px;
}

.form-field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 14px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color var(--transition-base);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--color-gold);
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-consent {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 20px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.form-consent input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
}

.form-consent a {
  color: var(--color-gold);
  border-bottom: 1px dotted var(--color-border-strong);
}

/* ---- Дисклеймер ---- */
.disclaimer-block {
  background: rgba(15, 40, 73, 0.5);
  border-left: 3px solid var(--color-gold);
  padding: 28px 32px;
  margin: 48px 0 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.disclaimer-block .label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 12px;
  display: block;
}

.disclaimer-block p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ---- Подвал ---- */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 20px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  transition: color var(--transition-base);
}
.footer-col a:hover { color: var(--color-gold); }

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.65;
  margin: 16px 0 0;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer-bottom a {
  color: var(--color-text-muted);
  margin-right: 24px;
}
.footer-bottom a:hover { color: var(--color-gold); }

/* ---- Адаптивность ---- */
@media (max-width: 960px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px 32px;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
  }
  .main-nav.open { display: flex; }
  .main-nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
  }
  .main-nav a:last-child { border-bottom: none; }

  .mobile-toggle { display: inline-flex; }

  .header-actions { gap: 8px; }

  .fact-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .footer-bottom { flex-direction: column; gap: 12px; }

  .hero-actions .btn { width: 100%; }
}