/* ==========================================================================
   Loncin XWolf Design System — Base: reset, типографика, утилиты
   ========================================================================== */

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

* { margin: 0; }

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img { height: auto; }

input, button, textarea, select { font: inherit; color: inherit; }

/* --- Типографика --- */

h1, h2, h3, h4 {
  line-height: var(--leading-heading);
  font-weight: 700;
  text-wrap: balance;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); font-weight: 500; letter-spacing: 0; }
h4 { font-size: var(--text-body); font-weight: 500; letter-spacing: 0; }

p { max-width: 65ch; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--dur-1) var(--ease);
}
a:hover { color: var(--accent-hover); }

small { font-size: var(--text-small); }

::selection { background: var(--accent); color: var(--on-accent); }

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

/* --- Утилиты --- */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: calc(var(--container-wide) + 2 * var(--gutter)); }

.section { padding-block: clamp(var(--space-16), 9vw, var(--space-30)); }
.section--tight { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); }
.section--subtle { background: var(--bg-subtle); }

.eyebrow {
  display: block;
  font-size: var(--text-caption);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.display {
  font-size: var(--text-display);
  line-height: var(--leading-tight);
  text-transform: uppercase;
  letter-spacing: -0.015em;
  font-weight: 700;
}

.lead {
  font-size: clamp(1.0625rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.55;
}

.text-secondary { color: var(--text-secondary); }
.tabular { font-variant-numeric: tabular-nums; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -48px; left: var(--space-4);
  z-index: calc(var(--z-nav) + 1);
  background: var(--accent);
  color: var(--on-accent);
  padding: var(--space-3) var(--space-5);
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  transition: top var(--dur-2) var(--ease);
}
.skip-link:focus { top: 0; color: var(--on-accent); }

/* Заголовок секции с "воздухом" */
.section-head { margin-bottom: clamp(var(--space-10), 5vw, var(--space-16)); }
.section-head p { margin-top: var(--space-4); }
.section-head--center { text-align: center; }
.section-head--center p { margin-inline: auto; }

/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   PREMIUM LAYER — типографика и ритм
   ========================================================================== */
h1, h2, h3, h4 { letter-spacing: var(--tracking-tight); }
.display { letter-spacing: var(--tracking-display); font-weight: 700; }
.eyebrow { letter-spacing: var(--tracking-eyebrow); font-weight: 600; font-size: 0.6875rem; display: inline-flex; align-items: center; gap: var(--space-2); }
.eyebrow::before { content: ""; width: 18px; height: 1.5px; background: currentColor; opacity: .6; }
.section-head--center .eyebrow { justify-content: center; }
.lead { letter-spacing: -0.003em; }
a { transition: color var(--dur-1) var(--ease); }
::selection { background: var(--accent); color: #fff; }

/* Тонкая линия-разделитель для секций */
.section--subtle { border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }