/* ==========================================================================
   COMPONENTS — nav, кнопки, карточки, теги, формы (светлая тема)
   ========================================================================== */

/* --- Разделитель-«шов» между секциями --- */
.seam {
  position: relative;
  height: 1px;
  border: 0;
  background: var(--border);
  overflow: visible;
}
.seam::after {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 3px;
  border-radius: 3px;
  background: var(--grad);
  opacity: 0.85;
}

/* ==========================================================================
   NAV
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out), backdrop-filter 0.3s;
}
.nav.scrolled {
  background: rgba(246, 245, 251, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}
.nav-link {
  position: relative;
  font-size: 15px;
  color: var(--ink-soft);
  transition: color 0.2s var(--ease-out);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-out);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }

/* --- Логотип Veliora --- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.logo-mark {
  width: 26px;
  height: 26px;
  flex: none;
}
.logo .logo-dot { color: var(--iris); }

/* --- Кнопки --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 13px 22px;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.2s var(--ease-out), box-shadow 0.25s var(--ease-out), filter 0.2s;
}
.btn-primary {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: var(--grad);
  box-shadow: 0 6px 18px var(--glow);
}
/* Лёгкий блик пробегает по кнопке — только transform, идёт на GPU */
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 35%, rgba(255,255,255,0.40) 50%, transparent 65%);
  transform: translateX(-130%);
  animation: sheen 6s var(--ease-out) infinite;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px var(--glow);
  filter: saturate(1.06);
}
@keyframes sheen {
  0%, 18%  { transform: translateX(-130%); }
  48%, 100% { transform: translateX(130%); }
}
.btn-ghost {
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-arrow { width: 15px; height: 15px; transition: transform 0.3s var(--ease-out); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* --- Ссылка-CTA со стрелкой --- */
.link-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--iris-ink);
  font-weight: 600;
  font-size: 15px;
  transition: gap 0.25s var(--ease-out);
}
.link-cta:hover { gap: 12px; }
.link-cta svg { width: 14px; height: 14px; }

/* --- Теги / чипы --- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border-radius: var(--r-pill);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  transition: border-color 0.2s var(--ease-out), color 0.2s var(--ease-out);
}
.tag:hover { color: var(--iris-ink); border-color: var(--iris); }

/* --- Универсальная карточка --- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-8);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

/* --- Бургер --- */
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-mid);
  background: var(--surface);
  align-items: center;
  justify-content: center;
}
.nav-toggle span { position: relative; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: background 0.2s; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform 0.25s var(--ease-out);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top: 6px; }
.nav.open .nav-toggle span { background: transparent; }
.nav.open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
.nav.open .nav-toggle span::after  { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-4) var(--sp-6) var(--sp-8);
    background: rgba(246, 245, 251, 0.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
  }
  .nav.open .nav-links { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { padding: var(--sp-4) 0; font-size: 17px; border-bottom: 1px solid var(--border); }
  .nav-link::after { display: none; }
  .nav-links .btn { margin-top: var(--sp-4); justify-content: center; }
}