/* Сброс, типографика, утилиты, кнопки и базовые компоненты. */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + var(--navbar-h)); }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; }
img { display: block; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }
h1, h2, h3, h4 { line-height: var(--lh-tight); font-weight: var(--fw-xb); letter-spacing: -0.01em; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.sr-only {
  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; left: var(--s-4); top: -100px; z-index: var(--z-toast);
  padding: var(--s-3) var(--s-4); background: var(--c-primary); color: #fff;
  border-radius: var(--r-md); font-weight: var(--fw-sb);
}
.skip-link:focus { top: var(--s-4); }

.container {
  width: min(var(--container), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.icon {
  width: 1em; height: 1em; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.75;
  stroke-linecap: round; stroke-linejoin: round;
}

.list-reset { list-style: none; }

/* --- Кнопки ------------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: var(--tap); padding: 0 var(--s-6);
  border: 1px solid transparent; border-radius: var(--r-md);
  font-size: var(--fs-sm); font-weight: var(--fw-sb); line-height: 1; white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.btn .icon { font-size: 1.15em; }
.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-hover); }
.btn--primary:active { background: var(--c-primary-active); }
.btn--outline-light { border-color: rgba(255, 255, 255, 0.75); color: #fff; background: rgba(0, 0, 0, 0.18); }
.btn--outline-light:hover { background: rgba(255, 255, 255, 0.14); border-color: #fff; }
.btn--outline { border-color: var(--c-primary); color: var(--c-primary); background: #fff; }
.btn--outline:hover { background: var(--c-primary-50); }
.btn--white { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn--white:hover { background: var(--c-primary-50); }
.btn--block { display: flex; width: 100%; }
.btn--lg { min-height: 52px; padding: 0 var(--s-8); font-size: var(--fs-body); }
.btn--sm { min-height: 40px; padding: 0 var(--s-4); }
.btn[disabled], .btn.is-loading { opacity: 0.65; pointer-events: none; }

.round-btn {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 32px; height: 32px; border-radius: var(--r-full);
  background: #fff; border: 1px solid var(--c-primary-200); color: var(--c-primary);
  font-size: 16px; transition: background-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
}
.round-btn--shadow { border: 0; color: var(--c-text); box-shadow: var(--sh-round); width: 40px; height: 40px; font-size: 18px; }
a:hover > .round-btn, a:focus-visible > .round-btn, .round-btn:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* --- Заголовок секции ---------------------------------------------------- */

.section { padding-block: var(--s-8); }
.section__head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: var(--s-4);
  margin-bottom: var(--s-5);
}
.section__title {
  position: relative; font-size: var(--fs-h2); padding-bottom: var(--s-3);
}
.section__title::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 36px; height: 3px;
  background: var(--c-primary); border-radius: 2px;
}
.section__more {
  display: inline-flex; align-items: center; gap: var(--s-2); color: var(--c-primary);
  font-size: var(--fs-sm); font-weight: var(--fw-sb); white-space: nowrap;
}
.section__more:hover { text-decoration: underline; }

/* --- Формы ---------------------------------------------------------------- */

.field { display: grid; gap: var(--s-2); }
.field__label { font-weight: var(--fw-sb); font-size: var(--fs-sm); }
.field__label .req { color: var(--c-primary); }
.field input[type="text"], .field input[type="tel"], .field input[type="email"], .field select, .field textarea {
  width: 100%; min-height: 48px; padding: 12px 14px;
  border: 1px solid var(--c-border); border-radius: var(--r-md); background: #fff;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-focus);
}
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--c-error); }
.field__error { color: var(--c-error); font-size: var(--fs-sm); }
.field__hint { color: var(--c-text-muted); font-size: var(--fs-xs); }
.check { display: flex; gap: var(--s-3); align-items: flex-start; font-size: var(--fs-sm); }
.check input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--c-primary); flex: none; }

.alert {
  padding: var(--s-4) var(--s-5); border-radius: var(--r-md); border: 1px solid;
  display: flex; gap: var(--s-3); align-items: flex-start;
}
.alert--success { background: #f0fdf4; border-color: #bbf7d0; color: #14532d; }
.alert--error { background: #fef2f2; border-color: #fecaca; color: #7f1d1d; }

/* --- Чипы и вкладки ------------------------------------------------------- */

.chips {
  display: flex; gap: var(--s-2); overflow-x: auto; padding-bottom: var(--s-1);
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  min-height: 40px; padding: 0 var(--s-4); border-radius: var(--r-md);
  background: var(--c-surface); color: var(--c-text); font-size: var(--fs-sm); font-weight: var(--fw-sb);
  border: 1px solid transparent; white-space: nowrap;
  transition: background-color var(--t-fast), color var(--t-fast);
}
.chip:hover { background: var(--c-primary-100); }
.chip[aria-current="true"], .chip.is-active { background: var(--c-primary); color: #fff; }

.tabs { display: flex; gap: var(--s-2); overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: none; min-height: 44px; padding: 0 var(--s-5); border-radius: var(--r-md);
  display: inline-flex; align-items: center; font-weight: var(--fw-sb); font-size: var(--fs-sm);
  border: 1px solid var(--c-border); background: #fff; transition: background-color var(--t-fast);
}
.tab:hover { background: var(--c-primary-50); }
.tab[aria-selected="true"] { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* --- Скелетон, тост ------------------------------------------------------- */

.skeleton {
  background: linear-gradient(90deg, #f1f2f4 25%, #e7e9ed 37%, #f1f2f4 63%);
  background-size: 400% 100%; animation: skeleton 1.2s ease infinite; border-radius: var(--r-md);
}
@keyframes skeleton { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

.toasts {
  position: fixed; right: var(--s-4); bottom: var(--s-4); z-index: var(--z-toast);
  display: grid; gap: var(--s-2); max-width: min(380px, calc(100vw - 32px));
}
.toast {
  padding: var(--s-3) var(--s-4); border-radius: var(--r-md); background: var(--c-text); color: #fff;
  box-shadow: var(--sh-round); font-size: var(--fs-sm);
}
.toast--success { background: var(--c-success); }
.toast--error { background: var(--c-primary-hover); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}