/**
 * Kalyx - Layout Structure, Header, Drawer & Footer
 */

/* ==========================================================================
   1. CONTAINERS & SECTIONS
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  position: relative;
}

.section-alt {
  background-color: var(--surface-alt);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}

.section-sm {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

/* ==========================================================================
   2. HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--surface-border);
  transition: box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  background-color: rgba(255, 255, 255, 0.98);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--brand-primary);
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-logo-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-extrabold);
  font-size: 1.1rem;
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-logo-title {
  line-height: 1;
}

.brand-logo-tagline {
  font-size: 0.65rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Desktop Nav */
.desktop-nav {
  display: none;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-2xs);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--brand-accent);
}

.nav-link.active {
  color: var(--brand-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand-accent);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Header Phone quick dial */
.header-phone-link {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.header-phone-link:hover {
  color: var(--brand-primary);
  background-color: var(--surface-muted);
}

/* Mobile Hamburger Toggle */
.mobile-toggle-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-muted);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
  cursor: pointer;
  z-index: calc(var(--z-drawer) + 1);
  transition: background-color var(--transition-fast);
}

.mobile-toggle-btn:hover {
  background-color: var(--surface-border);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  border-radius: 2px;
}

.hamburger-line + .hamburger-line {
  margin-top: 5px;
}

.mobile-toggle-btn.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle-btn.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-toggle-btn.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   3. MOBILE DRAWER NAVIGATION
   ========================================================================== */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--surface-overlay);
  z-index: var(--z-drawer);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-drawer-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 360px);
  background-color: var(--surface-body);
  z-index: calc(var(--z-drawer) + 1);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
}

.mobile-nav-link {
  display: block;
  font-size: var(--text-md);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--brand-accent);
  background-color: var(--brand-primary-light);
}

.mobile-drawer-footer {
  margin-top: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--surface-border);
}

/* ==========================================================================
   4. GRID SYSTEMS
   ========================================================================== */
.grid {
  display: grid;
  gap: var(--space-lg);
}

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

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

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

/* ==========================================================================
   5. SITE FOOTER
   ========================================================================== */
.site-footer {
  background-color: #0b1329;
  color: #cbd5e1;
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-xl);
  font-size: var(--text-sm);
}

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

.footer-brand p {
  color: #94a3b8;
  margin-top: var(--space-sm);
  max-width: 320px;
  line-height: var(--line-height-relaxed);
}

.footer-heading {
  color: #ffffff;
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

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

.footer-link {
  color: #94a3b8;
  transition: color var(--transition-fast);
  display: inline-block;
  padding: 2px 0;
}

.footer-link:hover {
  color: #ffffff;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  color: #94a3b8;
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--brand-accent);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
  text-align: center;
  color: #64748b;
  font-size: var(--text-xs);
}

.footer-legal-links {
  display: flex;
  gap: var(--space-md);
}

.footer-legal-links a {
  color: #94a3b8;
  transition: color var(--transition-fast);
}

.footer-legal-links a:hover {
  color: #ffffff;
}

/* ==========================================================================
   6. RESPONSIVE BREAKPOINTS (Tablet & Desktop)
   ========================================================================== */
@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .desktop-nav {
    display: flex;
  }
  .mobile-toggle-btn {
    display: none;
  }
  .header-phone-link {
    display: inline-flex;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}