/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.75rem 1.25rem;
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border-radius: var(--radius-button);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: var(--color-brand-blue);
  color: var(--color-white);
  border-color: var(--color-brand-blue);
}

.btn-primary:hover {
  background: var(--color-brand-blue-soft);
  border-color: var(--color-brand-blue-soft);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-brand-blue);
  border-color: var(--color-brand-blue);
}

.btn-secondary:hover {
  background: var(--color-off-white);
  color: var(--color-brand-blue-soft);
  border-color: var(--color-brand-blue-soft);
}

.btn-light {
  background: var(--color-white);
  color: var(--color-brand-blue);
  border-color: var(--color-white);
}

.btn-light:hover {
  background: var(--color-off-white);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-header);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 100%;
  max-width: var(--max-width-content);
  margin-inline: auto;
  padding-inline: var(--section-padding-x);
}

.logo-link {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-black);
}

.logo-link:hover,
.logo-link:focus {
  color: var(--color-black);
}

.site-brand {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-black);
  letter-spacing: -0.03em;
  line-height: 1;
}

.site-brand-sub {
  margin-top: 0.2rem;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-black);
  line-height: 1;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-black);
  position: relative;
  transition: background var(--transition-fast);
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--color-black);
  transition: transform var(--transition-fast);
}

.nav-toggle-bar::before {
  top: -7px;
}

.nav-toggle-bar::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-ink);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.site-nav a:hover {
  color: var(--color-brand-blue);
}

.header-cta {
  display: none;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
  }

  .header-cta {
    display: inline-flex;
  }
}

.site-nav.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: var(--header-height) 0 0 0;
  z-index: var(--z-menu);
  background: var(--color-white);
  padding: 2rem var(--section-padding-x);
  gap: 1.25rem;
  overflow-y: auto;
}

.site-nav.is-open a {
  font-size: var(--font-size-lg);
}

/* Blue band */
.band-assurance {
  width: 100%;
  background: var(--color-brand-blue);
  color: var(--color-white);
  padding-block: var(--section-padding-y);
}

.band-assurance .section-title {
  color: var(--color-white);
}

.band-assurance ul {
  list-style: none;
  padding: 0;
  max-width: 40rem;
}

.band-assurance li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.band-assurance li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  background: var(--color-white);
  border-radius: 50%;
}

.band-assurance li + li {
  margin-top: 0;
}

/* CTA strip */
.cta-strip {
  background: var(--color-off-white);
  padding-block: 2rem;
  text-align: center;
}

.cta-strip p {
  margin-bottom: 1rem;
  font-weight: 600;
  color: var(--color-black);
}

/* Footer */
.site-footer {
  background: var(--color-brand-blue);
  color: var(--color-white);
  padding-block: 2.5rem;
}

.site-footer a {
  color: var(--color-white);
  text-decoration: underline;
}

.site-footer a:hover {
  opacity: 0.9;
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-brand {
  font-weight: 700;
  font-size: var(--font-size-lg);
  margin-bottom: 0.5rem;
}

.footer-tagline {
  opacity: 0.9;
  font-size: var(--font-size-sm);
}

.footer-copy {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  font-size: var(--font-size-sm);
  opacity: 0.85;
}

/* Mobile sticky CTA */
.mobile-cta-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-mobile-bar);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(26, 26, 26, 0.08);
}

.mobile-cta-bar .btn {
  border-radius: 0;
  min-height: 52px;
  border: none;
  border-right: 1px solid var(--color-border);
}

.mobile-cta-bar .btn:last-child {
  border-right: none;
}

@media (min-width: 769px) {
  .mobile-cta-bar {
    display: none;
  }
}

/* Steps */
.steps {
  display: grid;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
}

@media (min-width: 700px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step-card {
  background: var(--color-off-white);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--color-brand-blue);
  color: var(--color-white);
  font-weight: 700;
  font-size: var(--font-size-sm);
  border-radius: 50%;
  margin-bottom: 0.75rem;
}

.step-card h3 {
  font-size: var(--font-size-base);
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: var(--font-size-sm);
}

/* Portfolio */
.projects-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.project-card-header {
  padding: 1rem 1.25rem 0;
}

.project-card-header h3 {
  font-size: var(--font-size-base);
  margin-bottom: 0.25rem;
}

.project-story {
  font-size: var(--font-size-sm);
  color: var(--color-ink);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.2rem 0.5rem;
  background: var(--color-off-white);
  color: var(--color-ink);
  border-radius: 4px;
}

.compare-slider {
  position: relative;
  margin-top: 1rem;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

.compare-slider img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.compare-after-wrap {
  position: absolute;
  inset: 0;
  width: 50%;
  overflow: hidden;
}

.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  margin-left: -2px;
  background: var(--color-white);
  cursor: ew-resize;
  z-index: 2;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.compare-handle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  background: var(--color-white);
  border-radius: 50%;
  border: 2px solid var(--color-brand-blue);
  box-shadow: var(--shadow-card);
}

.compare-label {
  position: absolute;
  top: 0.75rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(26, 26, 26, 0.65);
  color: var(--color-white);
  border-radius: 4px;
  z-index: 3;
  pointer-events: none;
}

.compare-label--before {
  left: 0.75rem;
}

.compare-label--after {
  right: 0.75rem;
}

.project-placeholder {
  aspect-ratio: 4 / 3;
  background: linear-gradient(
    135deg,
    var(--color-skeleton) 0%,
    var(--color-border) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  padding: 1rem;
}

.projects-empty {
  text-align: center;
  padding: 2rem;
  background: var(--color-off-white);
  border-radius: var(--radius-card);
  border: 1px dashed var(--color-border);
}

.projects-empty p {
  margin-bottom: 1rem;
  color: var(--color-ink);
}

/* About placeholder */
.about-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 280px 1fr;
  }
}

.about-photo {
  aspect-ratio: 4 / 5;
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-ink);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: 1rem;
}

.about-photo-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-brand-blue);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-list {
  list-style: none;
  padding: 0;
}

.contact-list li {
  margin-bottom: 1rem;
}

.contact-list strong {
  display: block;
  color: var(--color-black);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.contact-list a {
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-decoration: none;
}

.map-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  min-height: 280px;
}

.map-wrap iframe {
  width: 100%;
  height: 280px;
  border: 0;
}

.trust-line {
  font-size: var(--font-size-sm);
  color: var(--color-ink);
  margin-top: 1.5rem;
  font-style: italic;
}