/* ---------------------------------------------------------------
   BASE / RESET / TYPOGRAPHY / LAYOUT UTILITIES
--------------------------------------------------------------- */

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

/* Гарантируем, что атрибут [hidden] всегда побеждает — иначе класс с
   собственным display (flex/grid/…) той же специфичности, объявленный
   позже в каскаде, может визуально "включить" элемент, скрытый через
   JS (el.hidden = true). См. auth-form-error, review-gate и т.п. */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-background);
  color: var(--color-foreground);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out);
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

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

button { cursor: pointer; }

h1, h2, h3, h4, p, figure { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

::selection {
  background: var(--color-primary);
  color: var(--color-primary-foreground);
}

/* Focus visibility — заметен в обеих темах */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

@media (max-width: 640px) {
  .container { padding-inline: 1.25rem; }
}

.section { padding-block: var(--space-3xl); }
@media (max-width: 768px) {
  .section { padding-block: var(--space-2xl); }
}

.section-soft { background: var(--color-background-soft); }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary-subtle-border);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-foreground);
}

.section-subtitle {
  margin-top: var(--space-xs);
  font-size: 1.0625rem;
  color: var(--color-foreground-muted);
  line-height: 1.6;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--color-primary);
  color: var(--color-primary-foreground);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  transition: top var(--duration-base) var(--ease-out);
  font-weight: 600;
  font-size: 0.875rem;
}
.skip-link:focus { top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
  user-select: none;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-foreground);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-lg { padding: 1rem 1.75rem; font-size: 1rem; border-radius: var(--radius-lg); width: 100%; }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-foreground);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.btn-ghost {
  background: transparent;
  color: var(--color-foreground);
}
.btn-ghost:hover { background: var(--color-surface-secondary); }

.btn-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-primary);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.btn-link:hover { color: var(--color-primary-hover); text-decoration: underline; }

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--duration-base) var(--ease-out), background var(--duration-base) var(--ease-out), transform var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}
.btn-icon:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-icon:active { transform: scale(0.94); }

.icon { width: 1.15em; height: 1.15em; flex-shrink: 0; }