/* ==========================================================================
   VIRETTO — Layout
   Grid, Container, Header, Footer, Navigation
   ========================================================================== */

/* ── Container ───────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--v-container-max);
  margin: 0 auto;
  padding: 0 var(--v-gutter);
}

.container--narrow {
  max-width: var(--v-container-narrow);
}

.container--tight {
  max-width: var(--v-container-tight);
}

/* ── Section ─────────────────────────────────────────────────────────────── */
.section {
  padding: var(--v-section-padding) 0;
  position: relative;
}

.section--sm {
  padding: var(--v-space-9) 0;
}

.section--lg {
  padding: var(--v-space-12) 0;
}

.section--dark {
  background: var(--v-dark);
}

.section--darker {
  background: var(--v-dark-card);
}

/* ── Grid ────────────────────────────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--v-space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-auto {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

/* ── Header / Navigation ────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--v-z-fixed);
  padding: var(--v-space-4) 0;
  transition: var(--v-transition-base);
}

.header.is-scrolled {
  background: rgba(12, 17, 23, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: var(--v-space-3) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--v-space-6);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--v-space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  height: 38px;
  width: auto;
  color: var(--v-white);
  flex-shrink: 0;
}

.logo-group {
  display: flex;
  flex-direction: column;
}

.logo-text {
  font-family: var(--v-font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--v-white);
  letter-spacing: var(--v-ls-tight);
  line-height: 1;
}

.logo-tagline {
  font-family: var(--v-font-body);
  font-size: var(--v-fs-overline);
  color: var(--v-copper);
  letter-spacing: var(--v-ls-wide);
  font-weight: 400;
  display: block;
  margin-top: 2px;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--v-space-1);
}

.nav-link {
  padding: 0.5rem 1rem;
  font-family: var(--v-font-heading);
  font-size: var(--v-fs-body-sm);
  font-weight: 500;
  color: var(--v-text-secondary);
  transition: var(--v-transition-fast);
  border-radius: var(--v-radius-sm);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--v-white);
}

.nav-link.is-active {
  background: rgba(255, 255, 255, 0.06);
}

.nav-cta {
  margin-left: var(--v-space-3);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--v-radius-sm);
  color: var(--v-white);
  transition: var(--v-transition-fast);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.menu-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: var(--v-transition-base);
  position: relative;
}

.menu-toggle-bar::before,
.menu-toggle-bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: var(--v-transition-base);
}

.menu-toggle-bar::before { top: -7px; }
.menu-toggle-bar::after  { bottom: -7px; }

.menu-toggle.is-active .menu-toggle-bar {
  background: transparent;
}

.menu-toggle.is-active .menu-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.is-active .menu-toggle-bar::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* Mobile Nav Panel */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 320px);
  height: 100vh;
  background: var(--v-dark-card);
  border-left: var(--v-border-subtle);
  z-index: var(--v-z-overlay);
  padding: var(--v-space-10) var(--v-space-6) var(--v-space-6);
  flex-direction: column;
  gap: var(--v-space-2);
  transition: right var(--v-duration-slow) var(--v-ease-out);
  overflow-y: auto;
}

.mobile-nav.is-active {
  right: 0;
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(12, 17, 23, 0.7);
  z-index: calc(var(--v-z-overlay) - 1);
  opacity: 0;
  transition: opacity var(--v-duration-normal) var(--v-ease-out);
}

.mobile-nav-overlay.is-active {
  opacity: 1;
}

.mobile-nav-link {
  display: block;
  padding: var(--v-space-3) var(--v-space-4);
  font-family: var(--v-font-heading);
  font-size: var(--v-fs-body-lg);
  font-weight: 500;
  color: var(--v-text-secondary);
  border-radius: var(--v-radius-md);
  transition: var(--v-transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.is-active {
  color: var(--v-white);
  background: rgba(255, 255, 255, 0.04);
}

.mobile-nav .btn {
  margin-top: var(--v-space-4);
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  background: var(--v-dark);
  border-top: var(--v-border-subtle);
  padding: var(--v-space-11) 0 var(--v-space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--v-space-8);
  margin-bottom: var(--v-space-9);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .logo {
  margin-bottom: var(--v-space-4);
}

.footer-brand p {
  color: var(--v-text-secondary);
  font-size: var(--v-fs-body-sm);
  line-height: var(--v-lh-body);
  margin-bottom: var(--v-space-5);
}

.footer-heading {
  font-family: var(--v-font-heading);
  font-size: var(--v-fs-body-sm);
  font-weight: 600;
  color: var(--v-white);
  margin-bottom: var(--v-space-4);
  letter-spacing: var(--v-ls-wide);
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--v-space-3);
}

.footer-link {
  font-size: var(--v-fs-body-sm);
  color: var(--v-text-secondary);
  transition: color var(--v-duration-fast) var(--v-ease-out);
}

.footer-link:hover {
  color: var(--v-copper);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--v-space-6);
  border-top: var(--v-border-subtle);
  flex-wrap: wrap;
  gap: var(--v-space-4);
}

.footer-copyright {
  font-size: var(--v-fs-caption);
  color: var(--v-text-tertiary);
}

.footer-socials {
  display: flex;
  gap: var(--v-space-3);
}

.footer-social {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--v-gray-400);
  transition: var(--v-transition-fast);
}

.footer-social:hover {
  color: var(--v-copper);
  border-color: rgba(184, 115, 51, 0.3);
  background: rgba(184, 115, 51, 0.06);
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --v-section-padding: var(--v-space-9);
    --v-gutter: 1.25rem;
  }

  .nav { display: none; }
  .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .mobile-nav { display: flex; }
  .mobile-nav-overlay { display: block; }

  .logo-mark { height: 28px; }
  .logo-text { font-size: 1.4rem; }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--v-space-6);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .section-header {
    margin-bottom: var(--v-space-7);
  }

  .filter-bar {
    flex-direction: column;
  }

  .filter-bar .form-select {
    width: 100%;
  }

  .gallery--main {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    aspect-ratio: auto;
  }

  .gallery--main .gallery-item:first-child {
    grid-row: auto;
    aspect-ratio: 16 / 10;
  }

  .gallery--main .gallery-item:not(:first-child) {
    aspect-ratio: 16 / 10;
  }

  .step-card {
    flex-direction: column;
    gap: var(--v-space-3);
  }
}

@media (max-width: 480px) {
  :root {
    --v-gutter: 1rem;
  }

  .modal {
    width: 100vw;
    max-height: 100vh;
    border-radius: var(--v-radius-lg) var(--v-radius-lg) 0 0;
    top: auto;
    bottom: 0;
    left: 0;
    transform: translateY(100%);
  }

  .modal.is-active {
    transform: translateY(0);
  }

  .card-specs {
    flex-wrap: wrap;
    gap: var(--v-space-3);
  }
}