/* ==========================================================================
   Components — Nav, Footer, Cards
   ========================================================================== */

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: transparent;
  transition: background-color var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}

.nav--scrolled {
  background-color: rgba(245, 243, 240, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__wordmark {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-primary);
  cursor: pointer;
}

.nav__list {
  display: flex;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  padding: var(--space-2) 0;
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text-primary);
}

.nav__link--active {
  color: var(--color-text-primary);
}

.nav__link--active::after {
  width: 100%;
}

/* Hamburger Toggle */
.nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-text-primary);
}

.nav__icon--close {
  display: none;
}

.nav__toggle[aria-expanded="true"] .nav__icon--menu {
  display: none;
}

.nav__toggle[aria-expanded="true"] .nav__icon--close {
  display: block;
}

/* Mobile Menu Overlay */
.nav__overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(245, 243, 240, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out),
              visibility var(--duration-base) var(--ease-out);
}

.nav__overlay--open {
  opacity: 1;
  visibility: visible;
}

.nav__overlay-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
}

.nav__overlay-link {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-text-primary);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.nav__overlay--open .nav__overlay-link {
  opacity: 1;
  transform: translateY(0);
}

.nav__overlay--open .nav__overlay-link:nth-child(1) { transition-delay: 80ms; }
.nav__overlay--open .nav__overlay-link:nth-child(2) { transition-delay: 160ms; }
.nav__overlay--open .nav__overlay-link:nth-child(3) { transition-delay: 240ms; }

.nav__overlay-link:hover {
  color: var(--color-accent);
}

@media (max-width: 767px) {
  .nav__menu {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }
}

/* --- Footer --- */

.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copy {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.footer__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  color: var(--color-text-primary);
}

@media (max-width: 767px) {
  .footer__inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* --- Project Cards --- */

.project-card {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--border-radius);
  cursor: pointer;
}

.project-card__image-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.project-card__image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  transition: transform 0.5s var(--ease-out);
}

.project-card:hover .project-card__image-wrapper img,
.project-card:focus-visible .project-card__image-wrapper img {
  transform: scale(1);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
  background: var(--color-bg-overlay);
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}

.project-card:hover .project-card__overlay,
.project-card:focus-visible .project-card__overlay {
  opacity: 1;
}

.project-card__category {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(245, 243, 240, 0.7);
  transform: translateY(8px);
  opacity: 0;
  transition: transform 0.25s var(--ease-out) 0.05s,
              opacity 0.25s var(--ease-out) 0.05s;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #ffffff;
  margin-top: var(--space-2);
  line-height: 1.1;
  letter-spacing: -0.02em;
  transform: translateY(8px);
  opacity: 0;
  transition: transform 0.25s var(--ease-out) 0.1s,
              opacity 0.25s var(--ease-out) 0.1s;
}

.project-card__year {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(245, 243, 240, 0.6);
  margin-top: var(--space-1);
  transform: translateY(8px);
  opacity: 0;
  transition: transform 0.25s var(--ease-out) 0.15s,
              opacity 0.25s var(--ease-out) 0.15s;
}

.project-card__description {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(245, 243, 240, 0.75);
  margin-top: var(--space-3);
  line-height: 1.5;
  max-width: 100%;
  transform: translateY(8px);
  opacity: 0;
  transition: transform 0.25s var(--ease-out) 0.2s,
              opacity 0.25s var(--ease-out) 0.2s;
}

.project-card:hover .project-card__category,
.project-card:hover .project-card__title,
.project-card:hover .project-card__year,
.project-card:hover .project-card__description,
.project-card:focus-visible .project-card__category,
.project-card:focus-visible .project-card__title,
.project-card:focus-visible .project-card__year,
.project-card:focus-visible .project-card__description {
  transform: translateY(0);
  opacity: 1;
}

/* Touch devices: show info below image instead of overlay */
@media (hover: none) {
  .project-card__overlay {
    position: relative;
    background: transparent;
    opacity: 1;
    padding: var(--space-3) 0 0;
  }

  .project-card__category,
  .project-card__title,
  .project-card__year,
  .project-card__description {
    opacity: 1;
    transform: none;
    color: var(--color-text-primary);
  }

  .project-card__category {
    color: var(--color-text-secondary);
  }

  .project-card__year {
    color: var(--color-text-tertiary);
  }

  .project-card__description {
    color: var(--color-text-secondary);
  }
}