/* ==========================================================================
   DIMURA + PARTNERS - LAYOUT & NAVIGATION
   Foster + Partners Header, Fullscreen Overlay Menu & Architectural Footer
   File: css/layout.css (Under 700 lines)
   ========================================================================== */

/* Navbar Header */
.fp-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: transparent;
  border-bottom: none;
  z-index: 1050;
  transition: background-color var(--transition-base), border-color var(--transition-base), top 0.3s ease;
}

.fp-header.header-transparent {
  background-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none !important;
}

.fp-header.header-scrolled {
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .fp-header.header-scrolled {
  border-bottom: 1px solid var(--border-subtle);
}

.fp-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
}

/* Brand Logo */
.fp-brand {
  display: inline-flex;
  align-items: center;
  z-index: 1100;
  text-decoration: none;
  padding: 2px 0;
}

.fp-brand-logo {
  height: clamp(48px, 4.2vw, 56px);
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.fp-brand:hover .fp-brand-logo {
  transform: scale(1.04);
}

.header-transparent:not(.header-scrolled):not(:hover) .fp-brand-logo {
  filter: brightness(0) invert(1);
}

[data-theme="dark"] .fp-brand-logo {
  filter: brightness(0) invert(1);
}

/* Header Controls on Right (Foster + Partners Signature Pattern) */
.fp-navbar-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1100;
}

.fp-btn-cta-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--fp-pure-black);
  color: var(--fp-pure-black);
  background-color: transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.header-transparent:not(.header-scrolled):not(:hover) .fp-btn-cta-nav {
  border-color: rgba(255, 255, 255, 0.85);
  color: #FFFFFF;
}

.fp-btn-cta-nav:hover {
  background-color: var(--fp-pure-black);
  color: var(--text-inverted);
}

/* Circular Control Buttons (Search & Menu) */
.fp-control-btn {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--fp-pure-black);
  transition: color var(--transition-fast);
}

.header-transparent:not(.header-scrolled):not(:hover) .fp-control-btn {
  color: #FFFFFF;
}

.fp-control-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background-color: var(--fp-pure-black);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-fast);
}

.fp-control-btn:hover::after,
.fp-control-btn.active::after {
  opacity: 1;
}

.fp-control-btn:hover,
.fp-control-btn.active {
  color: var(--text-inverted) !important;
}

#lang-indicator {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fp-menu-label-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background-color: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  color: var(--fp-pure-black);
  transition: all var(--transition-fast);
}

.header-transparent:not(.header-scrolled):not(:hover) .fp-menu-label-btn {
  color: #FFFFFF;
}

.fp-menu-label-btn:hover,
.fp-menu-label-btn.active {
  background-color: var(--fp-pure-black);
  color: var(--text-inverted) !important;
}

/* Fullscreen Foster + Partners Architectural Overlay Menu */
.fp-overlay-menu {
  position: fixed;
  inset: 0;
  background-color: var(--bg-primary);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  display: flex;
  flex-direction: column;
  padding-top: var(--header-height);
  transition: opacity var(--transition-base), visibility var(--transition-base);
  overflow-y: auto;
}

.fp-overlay-menu.open {
  opacity: 1;
  visibility: visible;
}

.fp-menu-backdrop-preview {
  position: fixed;
  top: 0;
  right: 0;
  width: 55vw;
  height: 100vh;
  z-index: 1041;
  opacity: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
  transition: opacity 0.35s ease;
  filter: brightness(0.95);
}

.fp-menu-backdrop-preview.show {
  opacity: 0.22;
}

.fp-menu-content-grid {
  position: relative;
  z-index: 1045;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(28px, 3.2vw, 64px);
  padding-top: 56px;
  padding-bottom: 64px;
}

.fp-menu-col-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fp-grey-1);
  margin-bottom: 24px;
  border-bottom: 1px solid var(--fp-grey-border);
  padding-bottom: 10px;
}

.fp-menu-link-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fp-menu-link {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--fp-pure-black);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
  cursor: pointer;
}

.fp-menu-link:hover {
  color: var(--fp-black);
  transform: translateX(4px);
  text-decoration: underline;
}

.fp-menu-sublink {
  font-size: 0.9375rem;
  color: var(--fp-grey-base);
  display: block;
}

.fp-menu-sublink:hover {
  color: var(--fp-pure-black);
}

/* Foster + Partners Style Search Overlay */
.fp-search-overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 24px 0;
  z-index: 1048;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-base);
}

.fp-search-overlay.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.fp-search-input-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 2px solid var(--border-strong);
  padding-bottom: 8px;
}

.fp-search-input {
  width: 100%;
  border: none;
  outline: none;
  background-color: transparent;
  font-size: 1.25rem;
  font-family: var(--font-display);
  color: var(--text-primary);
}

/* Foster + Partners Architectural Grid Footer */
.fp-footer {
  border-top: 1px dotted var(--fp-grey-border);
  padding: clamp(52px, 5vw, 80px) 0 clamp(36px, 3.5vw, 52px) 0;
  background-color: var(--bg-primary);
}

.fp-footer-grid {
  display: grid;
  grid-template-columns: minmax(280px, 1.4fr) minmax(420px, 2fr) minmax(180px, 1fr);
  gap: clamp(36px, 4vw, 80px);
  margin-bottom: clamp(40px, 4vw, 60px);
}

.fp-footer-logo {
  height: clamp(54px, 5vw, 68px);
  width: auto;
  max-width: 150px;
  object-fit: contain;
  margin-bottom: 18px;
  display: block;
  transition: filter var(--transition-fast);
}

[data-theme="dark"] .fp-footer-logo {
  filter: brightness(0) invert(1);
}

.fp-footer-brand-title {
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.fp-footer-desc {
  font-size: clamp(0.9rem, 1vw, 1rem);
  color: var(--fp-grey-1);
  line-height: 1.65;
  max-width: 440px;
}

.fp-footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2vw, 36px);
}

.fp-footer-nav-col h6 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fp-pure-black);
  margin-bottom: 16px;
}

.fp-footer-nav-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--fp-grey-1);
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

.fp-footer-nav-col a:hover {
  color: var(--fp-pure-black);
  text-decoration: underline;
}

/* Footer Social Media Row */
.fp-footer-social-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px dotted var(--fp-grey-border);
}

.fp-footer-social-headline {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.fp-social-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fp-pure-black);
}

.fp-social-sub {
  font-size: 0.8125rem;
  color: var(--fp-grey-1);
}

.fp-footer-socials {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.fp-social-link {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--fp-grey-border);
  background: transparent;
  color: var(--fp-pure-black);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.fp-social-link svg {
  width: 17px;
  height: 17px;
  transition: transform var(--transition-fast);
}

.fp-social-link:hover {
  background: var(--fp-pure-black);
  color: var(--fp-pure-white);
  border-color: var(--fp-pure-black);
  transform: translateY(-2px);
}

.fp-social-link:hover svg {
  transform: scale(1.1);
}

[data-theme="dark"] .fp-social-link {
  border-color: rgba(255, 255, 255, 0.18);
  color: #f5f5f7;
}

[data-theme="dark"] .fp-social-link:hover {
  background: #ffffff;
  color: #0b0d10;
  border-color: #ffffff;
}

.fp-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px dotted var(--fp-grey-border);
  font-size: 0.8125rem;
  color: var(--fp-grey-2);
}

.fp-back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--fp-pure-black);
  cursor: pointer;
}

.fp-back-to-top:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
  .fp-menu-content-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
  .fp-footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .fp-header {
    height: 64px;
  }
  .fp-brand-logo {
    height: 44px;
  }
  .fp-btn-cta-nav {
    display: none;
  }
  .fp-navbar-controls {
    gap: 4px;
  }
  .fp-control-btn {
    width: 38px;
    height: 38px;
  }
  .fp-menu-label-btn {
    padding: 6px 12px;
    font-size: 0.75rem;
  }
  .fp-overlay-menu {
    padding-top: 64px;
  }
  .fp-menu-content-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 24px;
    padding-bottom: 48px;
  }
  .fp-menu-col-title {
    margin-bottom: 16px;
  }
  .fp-menu-link {
    font-size: 1.15rem;
  }
  .fp-search-overlay {
    top: 64px;
    padding: 16px 0;
  }
  .fp-search-input {
    font-size: 1rem;
  }
  .fp-footer {
    padding: 44px 0 32px 0;
  }
  .fp-footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }
  .fp-footer-nav-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .fp-footer-social-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px 0;
  }
  .fp-footer-socials {
    width: 100%;
    justify-content: flex-start;
  }
  .fp-footer-bottom {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
}