/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.6rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  border: 1px solid transparent;
  text-align: center;
}

.btn:hover {
  color: inherit;
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--color-white);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-charcoal);
  color: var(--color-charcoal);
}

.btn--outline:hover {
  background: var(--color-charcoal);
  color: var(--color-white);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Hero home */
.hero {
  position: relative;
  min-height: min(88vh, 52rem);
  display: flex;
  align-items: flex-end;
  color: var(--color-white);
  overflow: hidden;
  background: var(--color-charcoal);
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.1s ease;
  transform: scale(1.04);
}

.hero__slide.is-active {
  opacity: 1;
  transform: scale(1);
  transition: opacity 1.1s ease, transform 8s ease;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(26, 29, 33, 0.35) 0%, rgba(26, 29, 33, 0.78) 55%, rgba(26, 29, 33, 0.92) 100%);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  padding-bottom: var(--space-9);
  padding-top: var(--space-10);
}

.hero__brand {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 700;
  letter-spacing: 0.02em;
  max-width: 12ch;
  margin-bottom: var(--space-4);
  color: var(--color-white);
}

.hero__tagline {
  font-size: var(--fs-lg);
  color: var(--color-mist);
  max-width: 28rem;
  line-height: var(--lh-snug);
}

.hero__dots {
  position: absolute;
  z-index: 3;
  right: max(1rem, calc((100% - var(--container)) / 2));
  bottom: var(--space-6);
  display: flex;
  gap: var(--space-2);
}

.hero__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transition: background var(--transition), transform var(--transition);
}

.hero__dot.is-active {
  background: var(--color-safety);
  transform: scale(1.25);
}

/* Service tags / chips */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.tag {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-slate);
  background: var(--color-snow);
  border: 1px solid var(--color-mist);
  border-radius: var(--radius);
}

.tag--dark {
  background: var(--color-slate);
  border-color: var(--color-slate);
  color: var(--color-mist);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-mist);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.media-frame--portrait img {
  aspect-ratio: 3 / 4;
}

/* Project cards — interaction containers */
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-mist);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  height: 100%;
}

.project-card:hover {
  border-color: var(--color-steel);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  color: inherit;
}

.project-card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-slate);
}

.project-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__media img {
  transform: scale(1.04);
}

.project-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.project-card__code {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 600;
}

.project-card__title {
  font-family: var(--font-body);
  font-size: var(--fs-md);
  font-weight: 600;
  line-height: var(--lh-snug);
}

.project-card__meta {
  font-size: var(--fs-sm);
  color: var(--color-concrete);
  margin-top: auto;
  padding-top: var(--space-3);
}

/* Service blocks */
.service-block {
  padding: var(--space-6);
  background: var(--color-white);
  border-left: 3px solid var(--color-accent);
  height: 100%;
}

.service-block h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
}

.service-block p {
  font-size: var(--fs-sm);
  color: var(--color-concrete);
}

.service-visual {
  display: grid;
  gap: var(--space-5);
}

.service-visual__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--space-5);
  align-items: center;
}

.service-visual__item:nth-child(even) {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
}

.service-visual__item:nth-child(even) .service-visual__text {
  order: 2;
}

.service-visual__item:nth-child(even) .media-frame {
  order: 1;
}

.service-visual__text h3 {
  margin-bottom: var(--space-3);
}

.service-visual__text p {
  color: var(--color-concrete);
}

/* Stats / facts strip */
.fact-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  border-top: 1px solid var(--color-mist);
  border-bottom: 1px solid var(--color-mist);
  padding-block: var(--space-6);
}

.fact-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  color: var(--color-charcoal);
  margin-bottom: var(--space-2);
}

.fact-item span {
  font-size: var(--fs-sm);
  color: var(--color-concrete);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.data-table th,
.data-table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-mist);
  vertical-align: top;
}

.data-table th {
  width: 38%;
  color: var(--color-concrete);
  font-weight: 500;
  background: var(--color-snow);
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--color-mist);
  cursor: zoom-in;
  border: none;
  padding: 0;
  width: 100%;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.06);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(26, 29, 33, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.lightbox.is-open {
  display: flex;
}

.lightbox img {
  max-height: 90vh;
  max-width: min(960px, 100%);
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--color-white);
  font-size: 1.5rem;
  line-height: 1;
}

/* Contact form */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-7);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-info__item .label {
  display: block;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-concrete);
  margin-bottom: var(--space-1);
}

.contact-info__item a,
.contact-info__item p {
  font-size: var(--fs-md);
  font-weight: 500;
}

.contact-form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-snow);
  border: 1px solid var(--color-mist);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-field label {
  font-size: var(--fs-sm);
  font-weight: 500;
}

.form-field .req {
  color: var(--color-accent);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-mist);
  background: var(--color-white);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-field textarea {
  min-height: 9rem;
  resize: vertical;
}

.form-field.is-invalid input,
.form-field.is-invalid textarea {
  border-color: var(--color-error);
}

.form-error {
  font-size: var(--fs-xs);
  color: var(--color-error);
  display: none;
}

.form-field.is-invalid .form-error {
  display: block;
}

.form-status {
  font-size: var(--fs-sm);
  padding: var(--space-3) var(--space-4);
  display: none;
}

.form-status.is-success {
  display: block;
  background: rgba(45, 106, 79, 0.1);
  color: var(--color-success);
}

.form-status.is-error {
  display: block;
  background: rgba(155, 34, 38, 0.08);
  color: var(--color-error);
}

.map-placeholder {
  margin-top: var(--space-7);
  min-height: 20rem;
  background:
    linear-gradient(135deg, var(--color-mist) 25%, transparent 25%) -20px 0 / 40px 40px,
    linear-gradient(225deg, var(--color-mist) 25%, transparent 25%) -20px 0 / 40px 40px,
    linear-gradient(315deg, var(--color-mist) 25%, transparent 25%) 0 0 / 40px 40px,
    linear-gradient(45deg, var(--color-mist) 25%, var(--color-snow) 25%) 0 0 / 40px 40px;
  border: 1px solid var(--color-mist);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-6);
}

.map-placeholder__inner {
  background: rgba(255, 255, 255, 0.92);
  padding: var(--space-5) var(--space-6);
  max-width: 28rem;
}

.map-placeholder h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
}

.map-placeholder p {
  font-size: var(--fs-sm);
  color: var(--color-concrete);
  margin-bottom: var(--space-4);
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 48rem;
}

.faq-item {
  border: 1px solid var(--color-mist);
  background: var(--color-white);
}

.faq-item summary {
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  color: var(--color-accent);
  font-weight: 400;
  font-size: var(--fs-lg);
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item__body {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-concrete);
  font-size: var(--fs-sm);
}

/* CTA band */
.cta-band {
  background: var(--color-slate);
  color: var(--color-white);
  padding-block: var(--space-8);
  text-align: center;
}

.cta-band h2 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.cta-band p {
  color: var(--color-mist);
  max-width: 32rem;
  margin-inline: auto;
}

.cta-band .btn-group {
  justify-content: center;
}

/* Values */
.value-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.value-item {
  padding-top: var(--space-4);
  border-top: 2px solid var(--color-accent);
}

.value-item h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
}

.value-item p {
  font-size: var(--fs-sm);
  color: var(--color-concrete);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.cert-grid .media-frame img {
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--color-white);
  padding: var(--space-3);
}

.project-detail {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.project-detail__meta {
  background: var(--color-snow);
  border: 1px solid var(--color-mist);
  padding: var(--space-5);
}

.project-detail__meta h2 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-4);
}

.prose {
  font-size: var(--fs-md);
  color: var(--color-slate);
}

.prose h2,
.prose h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose ul {
  list-style: disc;
  padding-left: 1.25rem;
  margin-top: var(--space-3);
}

.prose li + li {
  margin-top: var(--space-2);
}

.prose li::marker {
  color: var(--color-accent);
}

@media (max-width: 960px) {
  .grid-2,
  .grid-3,
  .contact-layout,
  .project-detail,
  .service-visual__item,
  .service-visual__item:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .service-visual__item:nth-child(even) .service-visual__text,
  .service-visual__item:nth-child(even) .media-frame {
    order: initial;
  }

  .fact-row {
    grid-template-columns: 1fr 1fr;
  }

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

  .value-list,
  .cert-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }

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

  .fact-row {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 78vh;
  }
}