/* =====================================================
   base.css — reset, typography, utilities
   Вектор Сборки / site-builder v1
   ===================================================== */

/* Google Fonts import */
@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@400;600&family=Golos+Text:wght@400;500&family=Cormorant+Garamond:ital,wght@1,400&display=swap');

/* --------------------------------------------------
   Box-sizing reset
   -------------------------------------------------- */

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

/* --------------------------------------------------
   Base document
   -------------------------------------------------- */

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --------------------------------------------------
   Typography base
   -------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-text);
  font-weight: 600;
}

h1 {
  font-size: var(--text-h1);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-h1);
}

h2 {
  font-size: var(--text-h2);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-h2);
}

h3 {
  font-size: var(--text-h3);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-h3);
}

h4 {
  font-size: var(--text-h4);
  line-height: var(--lh-snug);
}

p {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--lh-body);
  color: var(--color-text);
}

a {
  color: var(--color-accent-2);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

input, textarea, select {
  font-family: var(--font-body);
}

/* --------------------------------------------------
   Layout utilities
   -------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--text {
  max-width: var(--container-text);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-xl);
}

.section--sm {
  padding-block: var(--space-lg);
}

/* --------------------------------------------------
   Color-scheme sections
   -------------------------------------------------- */

.bg-parchment {
  background-color: var(--color-bg);
}

.bg-paper {
  background-color: var(--color-surface);
}

.bg-deep {
  background-color: var(--color-deep);
  color: var(--color-text-inv);
}

.bg-deep h1,
.bg-deep h2,
.bg-deep h3,
.bg-deep h4,
.bg-deep p {
  color: var(--color-text-inv);
}

/* --------------------------------------------------
   Text utilities
   -------------------------------------------------- */

.text-dim {
  color: var(--color-text-dim);
}

.text-accent {
  color: var(--color-accent);
}

.text-inv {
  color: var(--color-text-inv);
}

.text-sm {
  font-size: var(--text-sm);
  line-height: var(--lh-caption);
}

.text-xs {
  font-size: var(--text-xs);
  line-height: var(--lh-caption);
}

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

/* --------------------------------------------------
   Reveal on scroll
   -------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger for children */
.reveal-group > *:nth-child(1) { transition-delay: 0ms; }
.reveal-group > *:nth-child(2) { transition-delay: 80ms; }
.reveal-group > *:nth-child(3) { transition-delay: 160ms; }
.reveal-group > *:nth-child(4) { transition-delay: 240ms; }
.reveal-group > *:nth-child(5) { transition-delay: 320ms; }