/* ============================================================
   ПП "Інноваційні безпекові комплекси" — custom styles
   Базується на Tailwind utility-класах + кастомні CSS-змінні.
   ============================================================ */

:root {
  --primary: #0A2540;
  --secondary: #1E3A5F;
  --accent: #C9A227;
  --accent-dark: #A8861C;
  --text: #1A1A1A;
  --text-muted: #4A5568;
  --bg: #FAFAFA;
  --bg-alt: #F1F5F9;
  --border: #E2E8F0;
  --white: #FFFFFF;
}

/* Reset базових елементів, які Tailwind preflight не покриває */
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif;
  color: var(--primary);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

/* Числові дані — табличні цифри для рівних колонок */
.tabular-nums,
time, .num { font-variant-numeric: tabular-nums; }

/* ---------- Кастомні утиліти ---------- */
.bg-primary    { background-color: var(--primary); }
.bg-secondary  { background-color: var(--secondary); }
.bg-accent     { background-color: var(--accent); }
.bg-bg-alt     { background-color: var(--bg-alt); }
.text-primary  { color: var(--primary); }
.text-accent   { color: var(--accent); }
.text-muted    { color: var(--text-muted); }
.border-default{ border-color: var(--border); }

/* Контейнер */
.container-x { max-width: 1200px; margin-left: auto; margin-right: auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 768px) { .container-x { padding-left: 1.5rem; padding-right: 1.5rem; } }

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color .18s ease, color .18s ease, transform .18s ease, box-shadow .18s ease;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  min-height: 48px; /* touch-target WCAG */
}
.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary {
  background-color: var(--accent);
  color: var(--primary);
}
.btn-primary:hover { background-color: var(--accent-dark); }
.btn-secondary {
  background-color: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-secondary:hover { background-color: rgba(255,255,255,0.08); }
.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover { background-color: var(--primary); color: var(--white); }

/* Картки */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: #CBD5E1;
  box-shadow: 0 10px 24px -12px rgba(10, 37, 64, 0.18);
}
.card-icon {
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(201, 162, 39, 0.12);
  color: var(--accent);
  border-radius: 8px;
  margin-bottom: 1rem;
}

/* Hero фон — векторний градієнт + силует, без важких зображень */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse at top right, rgba(201,162,39,0.18) 0%, transparent 55%),
    linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  overflow: hidden;
}
.hero h1 { color: var(--white); }
.hero-bg-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
}
.hero > .container-x { position: relative; z-index: 1; }

/* Секції */
section { padding: 4rem 0; }
@media (min-width: 768px) { section { padding: 5.5rem 0; } }

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) { .section-title { font-size: 2.25rem; } }

.section-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-lead {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 2.5rem;
}

/* Списки переваг */
.feature-list { display: grid; gap: 1rem; }
.feature-list li {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.feature-list .check {
  flex-shrink: 0;
  width: 24px; height: 24px;
  color: var(--accent);
  margin-top: 2px;
}

/* Форма */
.form-field { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 1.125rem; }
.form-field label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}
.form-field label .req { color: #C53030; }
.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--white);
  color: var(--text);
  transition: border-color .15s ease, box-shadow .15s ease;
  min-height: 48px;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(201,162,39,0.18);
}
.form-error {
  display: none;
  color: #C53030;
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}
.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea { border-color: #C53030; }
.form-field.has-error .form-error { display: block; }
.form-success {
  padding: 1rem 1.25rem;
  background: #ECFDF5;
  border: 1px solid #6EE7B7;
  border-radius: 6px;
  color: #065F46;
  margin-top: 1rem;
  display: none;
}
.form-success.visible { display: block; }

/* Хедер та навігація */
.site-header {
  position: sticky; top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}
.site-nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color .15s ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px; background: var(--accent);
}

.mobile-toggle {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
}
@media (min-width: 768px) { .mobile-toggle { display: none; } }

.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--white);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
}

/* Футер */
.site-footer {
  background: var(--primary);
  color: #CBD5E1;
  padding: 3rem 0 1.5rem;
  font-size: 0.9rem;
}
.site-footer h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 0.875rem; }
.site-footer a { color: #CBD5E1; transition: color .15s ease; }
.site-footer a:hover { color: var(--accent); }
.site-footer .footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8125rem;
  color: #94A3B8;
}

/* Fade-in анімація при скролі */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s ease;
  will-change: opacity, transform;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .fade-in { opacity: 1; transform: none; }
}

/* Skip-link для доступності */
.skip-link {
  position: absolute;
  left: -9999px; top: 0;
  background: var(--primary);
  color: var(--white);
  padding: 0.75rem 1rem;
  border-radius: 0 0 6px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Утиліти для звичайних адаптивних колонок (без Tailwind grid utilities) */
.grid-2 { display: grid; gap: 1.5rem; }
.grid-3 { display: grid; gap: 1.5rem; }
.grid-4 { display: grid; gap: 1.25rem; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Бейджі */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: rgba(201,162,39,0.14);
  color: var(--accent-dark);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 9999px;
}
.badge-light {
  background: rgba(255,255,255,0.14);
  color: var(--white);
}

/* Інформаційний банер довіри */
.trust-bar {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}
.trust-bar ul {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2.5rem;
  justify-content: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.trust-bar li { display: flex; align-items: center; gap: 0.5rem; }

/* Документи — список */
.docs-list li {
  display: flex;
  gap: 0.875rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.docs-list li:last-child { border-bottom: none; }
.docs-list .doc-icon {
  flex-shrink: 0;
  width: 36px; height: 36px;
  background: var(--bg-alt);
  color: var(--primary);
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
}
.docs-list .doc-title { font-weight: 600; color: var(--primary); }
.docs-list .doc-meta { font-size: 0.875rem; color: var(--text-muted); margin-top: 0.25rem; }