/* ============================================
   БАЗОВЫЕ СТИЛИ — Сброс и основа
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

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

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.018) 1px, transparent 1px),
    linear-gradient(180deg, rgba(0,0,0,0.014) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.32;
}

/* ── Скроллбар ── */
::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* ── Типографика ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: 0;
}

h1 { font-size: var(--font-size-hero); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }

p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

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

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

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  outline: none;
  border: none;
}

ul, ol {
  list-style: none;
}

/* ── Утилиты ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 15px;
  position: relative;
  z-index: 1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

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

.hidden { display: none !important; }
.visible { display: block !important; }

/* ── Секции ── */
.section {
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-2xl) 0;
  position: relative;
}

/* ── Адаптивность ── */
@media (min-width: 768px) {
  .container {
    max-width: var(--max-width-tablet);
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: var(--max-width-desktop);
  }
}

/* ── Выделение текста ── */
::selection {
  background: var(--color-accent);
  color: var(--color-text-primary);
}