/* ============================================
   STUDIO DA — Musterprojekt Interactive Features
   Sub-Nav, 3D Explorer, Floor Plan, Material Config
   ============================================ */

/* ===========================================
   SECTION D: STICKY SUB-NAVIGATION
   =========================================== */
.mp-subnav {
  position: sticky;
  top: 60px;
  z-index: calc(var(--z-nav) - 1);
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--duration-normal), top var(--duration-normal);
  overflow: hidden;
}

.mp-subnav.below-nav {
  top: 60px;
}

.mp-subnav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.mp-subnav__inner::-webkit-scrollbar {
  display: none;
}

.mp-subnav__link {
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  white-space: nowrap;
  position: relative;
  transition: color var(--duration-normal);
  cursor: pointer;
}

.mp-subnav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-lg);
  right: var(--space-lg);
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.mp-subnav__link:hover {
  color: var(--color-text);
}

.mp-subnav__link--active {
  color: var(--color-accent);
}

.mp-subnav__link--active::after {
  transform: scaleX(1);
}


/* ===========================================
   SECTION A: 3D GEBÄUDE-EXPLORER (Three.js)
   =========================================== */
.model-explorer {
  padding: var(--section-pad) 0;
  background: var(--color-bg);
}

/* Canvas container */
.model-explorer__canvas-wrap {
  position: relative;
  max-width: 960px;
  margin: 0 auto var(--space-3xl);
  border-radius: 16px;
  overflow: hidden;
  background: #1A1A1A;
  border: 1px solid var(--color-border);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.12),
    0 1px 4px rgba(0, 0, 0, 0.08);
}

/* Image Viewer */
.image-viewer {
  position: relative;
  width: 100%;
  min-height: 520px;
  background: #1A1A1A;
  border-radius: 16px;
}

.image-viewer__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 16px;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.image-viewer__img--active {
  opacity: 1;
  pointer-events: auto;
}

/* Glassmorphism Controls */
.model-explorer__controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 10;
}

.iv-ctrl {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(26, 26, 26, 0.55);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  cursor: pointer;
  transition:
    background 0.25s ease,
    border-color 0.25s ease,
    transform 0.2s ease,
    box-shadow 0.25s ease;
  user-select: none;
  line-height: 1;
}

.iv-ctrl:hover {
  background: rgba(26, 26, 26, 0.75);
  border-color: rgba(176, 137, 104, 0.5);
  transform: scale(1.08);
  box-shadow: 0 2px 12px rgba(176, 137, 104, 0.15);
}

.iv-ctrl:active {
  transform: scale(0.95);
}

.iv-ctrl--active {
  background: rgba(176, 137, 104, 0.25);
  border-color: rgba(176, 137, 104, 0.6);
  color: var(--color-accent);
  box-shadow: 0 0 12px rgba(176, 137, 104, 0.15);
}

/* Tooltip on hover */
.iv-ctrl[title] {
  position: relative;
}

.iv-ctrl[title]::after {
  content: attr(title);
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  padding: 5px 10px;
  font-size: 0.7rem;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: #fff;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(8px);
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.iv-ctrl[title]:hover::after {
  opacity: 1;
}

/* Info Cards Grid */
.model-explorer__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: 960px;
  margin: 0 auto var(--space-2xl);
}

.model-explorer__card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.model-explorer__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  border-top-color: var(--color-accent);
}

.model-explorer__card--active {
  border-color: var(--color-accent) !important;
  border-top-color: var(--color-accent) !important;
  box-shadow: 0 0 0 1px var(--color-accent), 0 4px 20px rgba(176, 137, 104, 0.12);
  transform: translateY(-4px);
}

.model-explorer__card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  transition: transform 0.3s ease;
}

.model-explorer__card:hover .model-explorer__card-icon {
  transform: scale(1.1);
}

.model-explorer__card-title {
  font-family: var(--font-display);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.model-explorer__card-text {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
  .model-explorer__cards {
    grid-template-columns: 1fr;
  }
  .image-viewer {
    min-height: 350px;
  }
  .model-explorer__controls {
    bottom: 10px;
    right: 10px;
    flex-direction: row;
  }
  .iv-ctrl {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }
  .iv-ctrl[title]::after {
    display: none;
  }
}


/* ===========================================
   SECTION B: INTERAKTIVER GRUNDRISS
   =========================================== */
.floor-plan {
  padding: var(--section-pad) 0;
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.floor-plan .section-header__title {
  color: var(--color-text-on-dark);
}

.floor-plan .overline {
  color: var(--color-accent);
}

.floor-plan .section-header__text {
  color: var(--color-text-on-dark-secondary);
}

/* Floor Tabs */
.floor-plan__tabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xl);
  justify-content: center;
}

.floor-plan__tab {
  padding: 0.7rem 1.8rem;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  background: transparent;
  color: var(--color-text-on-dark-secondary);
  border: 1.5px solid var(--color-border-on-dark);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.floor-plan__tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.floor-plan__tab--active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

/* Layout: SVG + Detail Panel */
.floor-plan__layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-2xl);
  align-items: start;
  margin-bottom: var(--space-3xl);
}

.floor-plan__svg-wrap {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.floor-plan__svg-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Room interactivity */
.floor-room {
  cursor: pointer;
  transition: fill var(--duration-fast), stroke var(--duration-fast);
  stroke: rgba(255,255,255,0.15);
  stroke-width: 1;
}

.floor-room:hover {
  filter: brightness(1.6);
  stroke: var(--color-accent);
  stroke-width: 2;
}

.floor-room--active {
  stroke: var(--color-accent) !important;
  stroke-width: 2.5 !important;
  filter: brightness(1.4);
}

.floor-label {
  font-family: 'Inter', sans-serif;
  font-size: 9px;
  fill: rgba(255, 255, 255, 0.85);
  pointer-events: none;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.floor-label--small {
  font-size: 7.5px;
  fill: rgba(255, 255, 255, 0.6);
}

/* Detail Panel */
.floor-plan__detail {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border-on-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  min-height: 300px;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.floor-plan__detail::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--duration-slow) var(--ease-out);
}

.floor-plan__detail--active::before {
  transform: scaleX(1);
}

.floor-plan__detail-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  text-align: center;
  color: var(--color-text-on-dark-secondary);
  gap: var(--space-md);
}

.floor-plan__detail-placeholder svg {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  opacity: 0.5;
}

.floor-plan__detail-content {
  display: none;
}

.floor-plan__detail-content.visible {
  display: block;
  animation: fadeUp 0.4s var(--ease-out) forwards;
}

.floor-plan__detail-name {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 500;
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-sm);
}

.floor-plan__detail-area {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.3rem 0.8rem;
  background: var(--color-accent-light);
  border-radius: var(--radius-full);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.floor-plan__detail-label {
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  margin-top: var(--space-lg);
}

.floor-plan__detail-function {
  font-size: var(--text-small);
  color: var(--color-text-on-dark-secondary);
  line-height: var(--leading-relaxed);
}

.floor-plan__detail-list {
  margin-top: var(--space-sm);
  padding: 0;
}

.floor-plan__detail-list li {
  font-size: var(--text-small);
  color: var(--color-text-on-dark-secondary);
  padding: var(--space-2xs) 0;
  padding-left: var(--space-md);
  position: relative;
}

.floor-plan__detail-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* Raumprogramm Table */
.floor-plan__table-wrap {
  overflow-x: auto;
}

.floor-plan__table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-small);
}

.floor-plan__table thead th {
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-on-dark);
}

.floor-plan__table tbody td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid rgba(250,250,248,0.06);
  color: var(--color-text-on-dark-secondary);
}

.floor-plan__table tbody tr:hover {
  background: rgba(255,255,255,0.04);
}

.floor-plan__table tbody td:first-child {
  color: var(--color-text-on-dark);
  font-weight: 500;
}

.floor-plan__table tbody td:nth-child(2) {
  color: var(--color-accent);
  font-weight: 600;
  white-space: nowrap;
}

.floor-plan__table-title {
  font-family: var(--font-display);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-lg);
}

@media (max-width: 900px) {
  .floor-plan__layout {
    grid-template-columns: 1fr;
  }
  .floor-plan__detail {
    min-height: auto;
  }
}


/* ===========================================
   SECTION C: MATERIAL-KONFIGURATOR
   =========================================== */
.material-config {
  padding: var(--section-pad) 0;
  background: var(--color-bg-alt);
}

.material-config__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* Facade Visualization */
.material-config__facade-wrap {
  position: relative;
}

.material-config__facade {
  width: 100%;
  aspect-ratio: 3/2;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  transition: background var(--duration-slower) var(--ease-out);
}

/* Facade Image */
.material-config__facade-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-lg);
  transition: filter 0.6s ease;
}

.material-config__facade-overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  pointer-events: none;
  transition: background 0.6s ease;
  mix-blend-mode: multiply;
}

/* Material Selection Panel */
.material-config__panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.material-config__section-label {
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xs);
}

.material-config__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.material-config__option {
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.material-config__option:hover {
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.material-config__option--active {
  border-color: var(--color-accent) !important;
  box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-md);
}

.material-config__option-swatch {
  width: 100%;
  height: 40px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.material-config__option-name {
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2xs);
}

.material-config__option-meta {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* Info Box */
.material-config__info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--duration-normal) var(--ease-out);
}

.material-config__info-title {
  font-family: var(--font-display);
  font-size: var(--text-h4);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.material-config__info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.material-config__info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.material-config__info-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.material-config__info-value {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-text);
}

.material-config__info-value--accent {
  color: var(--color-accent);
}

.material-config__info-desc {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
}

/* Roof toggle */
.material-config__roof-toggle {
  display: flex;
  gap: var(--space-xs);
}

.material-config__roof-btn {
  flex: 1;
  padding: 0.6rem 1rem;
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  background: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
}

.material-config__roof-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.material-config__roof-btn--active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

@media (max-width: 900px) {
  .material-config__layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .material-config__grid {
    grid-template-columns: 1fr;
  }
}