/* Concrete Heading */
.concrete-heading {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 100%);
  padding: clamp(40px, 6vw, 80px) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.concrete-heading::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.05;
  pointer-events: none;
}

.concrete-heading__text {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-shadow:
    2px 2px 0 rgba(0, 0, 0, 0.3),
    4px 4px 8px rgba(0, 0, 0, 0.2);
  position: relative;
  display: inline-block;
  background: linear-gradient(
    180deg,
    #e0e0e0 0%,
    #c0c0c0 25%,
    #a0a0a0 50%,
    #909090 75%,
    #808080 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(3px 3px 6px rgba(0, 0, 0, 0.4));
  /* Concrete frame */
  padding: clamp(20px, 3vw, 40px) clamp(30px, 5vw, 60px);
  border: 4px solid transparent;
  border-image: linear-gradient(
    135deg,
    #a0a0a0 0%,
    #c0c0c0 20%,
    #808080 40%,
    #909090 60%,
    #b0b0b0 80%,
    #707070 100%
  ) 1;
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.1),
    0 0 20px rgba(0, 0, 0, 0.3),
    0 4px 16px rgba(0, 0, 0, 0.2);
}

.concrete-heading__text::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 4px solid;
  border-image: linear-gradient(
    135deg,
    #a0a0a0 0%,
    #d0d0d0 25%,
    #909090 50%,
    #c0c0c0 75%,
    #808080 100%
  ) 1;
  pointer-events: none;
}

.concrete-heading__text::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 2px solid rgba(100, 100, 100, 0.5);
  pointer-events: none;
}

/* Projects Grid */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 280px;
  gap: 16px;
  margin-top: var(--space-lg);
}

.project__card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}

.project__card--featured {
  grid-column: span 2;
  grid-row: span 2;
}

.project__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project__card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project__card:hover img {
  transform: scale(1.08);
}

.project__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    0deg,
    rgba(0, 50, 100, 0.95) 0%,
    rgba(0, 50, 100, 0.7) 40%,
    rgba(0, 50, 100, 0.3) 70%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
}

.project__card:hover .project__overlay {
  opacity: 1;
  transform: translateY(0);
}

.project__name {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-white);
  margin-bottom: 8px;
  font-weight: 700;
}

.project__info {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 4px;
}

.project__size {
  font-size: var(--fs-body);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 16px;
}

.project__btn {
  display: inline-block;
  padding: 10px 24px;
  background: var(--color-accent);
  color: var(--color-dark);
  border-radius: var(--radius);
  font-size: var(--fs-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition);
  align-self: flex-start;
}

.project__btn:hover {
  background: var(--color-white);
  transform: translateX(4px);
}

/* Project Modal */
.project-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1001;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.project-modal.active {
  opacity: 1;
  visibility: visible;
}

.project-modal__content {
  width: 90vw;
  max-width: 1000px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.project-modal__close {
  position: absolute;
  top: -44px;
  right: 0;
  width: 36px;
  height: 36px;
  color: var(--color-white);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s;
  z-index: 2;
}

.project-modal__close:hover {
  opacity: 0.7;
}

.project-modal__gallery {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  min-height: 300px;
}

.project-modal__img {
  max-width: 100%;
  max-height: 60vh;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.project-modal__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  color: var(--color-white);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  transition: all 0.3s;
  z-index: 1;
}

.project-modal__nav:hover {
  background: rgba(0, 0, 0, 0.8);
}

.project-modal__prev { left: 16px; }
.project-modal__next { right: 16px; }

.project-modal__counter {
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-small);
  padding: 8px 0;
  background: #000;
}

.project-modal__info {
  background: var(--color-dark);
  padding: 24px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.project-modal__name {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-white);
  margin-bottom: 4px;
}

.project-modal__location {
  font-size: var(--fs-small);
  color: var(--color-accent);
  margin-bottom: 8px;
}

.project-modal__location:empty {
  display: none;
}

.project-modal__details {
  font-size: var(--fs-body);
  color: var(--color-text-light);
  line-height: 1.6;
  white-space: pre-line;
}

/* Partners Section */
.partners {
  background: var(--color-darker);
  padding: clamp(40px, 5vw, 60px) 0;
}

.partners__content {
  text-align: center;
}

.partners__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-white);
  margin-bottom: 8px;
}

.partners__subtitle {
  font-size: var(--fs-body);
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.partners__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 24px 40px;
}

.partner__logo {
  font-family: var(--font-heading);
  font-size: clamp(0.875rem, 2vw, 1.125rem);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 12px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.partner__logo:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 1023px) {
  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 240px;
  }

  .project__card--featured {
    grid-column: span 2;
    grid-row: span 1;
  }
}

@media (max-width: 768px) {
  .concrete-heading__text {
    font-size: clamp(1.25rem, 6vw, 2rem);
    letter-spacing: 0.04em;
  }

  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
  }

  .project__overlay {
    opacity: 1;
    transform: translateY(0);
    padding: 16px;
    background: linear-gradient(
      0deg,
      rgba(0, 50, 100, 0.95) 0%,
      rgba(0, 50, 100, 0.6) 50%,
      transparent 100%
    );
  }

  .project__name {
    font-size: var(--fs-body);
  }

  .project__size {
    font-size: var(--fs-small);
    margin-bottom: 8px;
  }

  .project__btn {
    padding: 6px 16px;
    font-size: var(--fs-xs);
  }

  .project-modal__content {
    width: 100vw;
    max-width: 100vw;
    max-height: 100vh;
  }

  .project-modal__gallery {
    border-radius: 0;
    min-height: 200px;
  }

  .project-modal__info {
    border-radius: 0;
  }

  .project-modal__close {
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 50%;
    width: 40px;
    height: 40px;
  }

  .project-modal__nav {
    width: 36px;
    height: 36px;
    font-size: 1.5rem;
  }

  .project-modal__prev { left: 8px; }
  .project-modal__next { right: 8px; }

  .partners__logos {
    gap: 16px 24px;
  }

  .partner__logo {
    font-size: 0.75rem;
    padding: 8px 14px;
  }
}

@media (max-width: 480px) {
  .projects__grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 220px;
  }

  .project__card--featured {
    grid-column: span 1;
  }
}