/* ============================================================
   ТЕМА
   ------------------------------------------------------------
   Акцентный цвет меняется в ОДНОМ месте: --accent ниже.
   Все оттенки (hover, подложки, тени) выводятся из него
   автоматически через color-mix().
   ============================================================ */
:root {
  /* 🌿 ГЛАВНЫЙ АКЦЕНТНЫЙ ЦВЕТ — поменяйте только эту строку */
  --accent: #2f7d4e;

  /* Производные оттенки (менять не нужно) */
  --accent-hover: color-mix(in srgb, var(--accent), #000 18%);
  --accent-soft: color-mix(in srgb, var(--accent), #fff 90%);
  --accent-soft-border: color-mix(in srgb, var(--accent), #fff 70%);
  --accent-dark: color-mix(in srgb, var(--accent), #000 45%);

  /* Палитра в духе anthropic.com */
  --bg: #faf9f5;            /* основной фон — тёплая слоновая кость */
  --bg-alt: #f0eee6;        /* фон чередующихся секций */
  --text: #1f1e1d;          /* почти чёрный, чуть тёплый */
  --text-muted: #5e5d59;
  --border: #e3e0d5;
  --card-bg: #ffffff;

  /* Типографика */
  --font-serif: Georgia, "Times New Roman", "Noto Serif", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --radius: 24px;
  --radius-pill: 999px;
  --container: 1120px;
}

/* ============================================================
   Базовые стили
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1em;
}

a {
  color: inherit;
}

img, svg {
  display: block;
}

/* ============================================================
   Кнопки
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease,
    color 0.2s ease, transform 0.15s ease;
  cursor: pointer;
}

.btn:active {
  transform: scale(0.98);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 15px;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--text);
}

.btn-ghost:hover {
  background: var(--text);
  color: var(--bg);
}

.btn-light {
  background: #fff;
  color: var(--accent-dark);
}

.btn-light:hover {
  background: var(--accent-soft);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* ============================================================
   Шапка
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg), transparent 12%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  width: 30px;
  height: 30px;
  color: var(--accent); /* логотип красится акцентным цветом */
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: 28px;
}

.site-nav a {
  text-decoration: none;
  font-size: 16px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Бургер для мобильных */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 96px 0 80px;
  background:
    radial-gradient(60% 80% at 85% 10%, var(--accent-soft) 0%, transparent 60%),
    var(--bg);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badges .eyebrow {
  margin: 0 0 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-soft-border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  margin: 0 0 24px;
}

.hero-title {
  font-size: clamp(38px, 6vw, 64px);
  max-width: 17ch;
}

.hero-subtitle {
  font-size: clamp(18px, 2vw, 21px);
  color: var(--text-muted);
  max-width: 56ch;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ============================================================
   Секции
   ============================================================ */
.section {
  padding: 88px 0;
}

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

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  max-width: 24ch;
  margin-bottom: 48px;
}

/* ============================================================
   Карточки услуг / принципов
   ============================================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.card h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-muted);
  font-size: 17px;
  margin: 0;
}

.card-plain {
  background: var(--card-bg);
  border-color: color-mix(in srgb, var(--border), #000 6%);
}

/* ============================================================
   Шаги процесса
   ============================================================ */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.step-num {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--accent);
  line-height: 1;
  min-width: 48px;
}

.step h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.step p {
  color: var(--text-muted);
  font-size: 17px;
  margin: 0;
}

/* ============================================================
   Чипы решений
   ============================================================ */
.chips {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.chips li {
  padding: 16px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--card-bg);
  font-size: 21px;
}

.solutions-note {
  color: var(--text-muted);
  max-width: 60ch;
  margin: 0;
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  background: var(--accent-dark);
  color: #fff;
}

.cta .section-title {
  color: #fff;
  margin-bottom: 20px;
}

.cta-inner {
  max-width: 760px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta p {
  color: color-mix(in srgb, #fff, transparent 25%);
  max-width: 52ch;
  margin-bottom: 32px;
}

/* ============================================================
   Подвал
   ============================================================ */
.site-footer {
  padding: 36px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-footer .brand-name {
  font-size: 18px;
}

.brand-footer .brand-mark {
  width: 24px;
  height: 24px;
}

.footer-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* ============================================================
   Появление при скролле
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================================
   Адаптив
   ============================================================ */
@media (max-width: 900px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
    display: none;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 0;
    font-size: 17px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .section {
    padding: 64px 0;
  }
}