.projects-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: transparent;
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  transition:
    background-color 300ms ease-out,
    border-color 300ms ease-out,
    box-shadow 300ms ease-out,
    backdrop-filter 300ms ease-out,
    -webkit-backdrop-filter 300ms ease-out;
}

.projects-header.scrolled {
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-lg);
}

.projects-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, var(--nav-container));
  height: 100%;
  margin: 0 auto;
}

.projects-brand {
  flex-shrink: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.625rem;
  white-space: nowrap;
  transition: color var(--transition);
}

.projects-brand:hover {
  color: var(--accent);
}

.projects-nav-links,
.projects-nav-menu {
  display: flex;
  align-items: center;
}

.projects-nav-links {
  gap: 0.5rem;
}

.projects-nav-menu a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  color: var(--neutral-600);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
  transition:
    color 150ms ease,
    background-color 150ms ease;
}

.projects-nav-menu a:hover {
  color: var(--primary);
  background: rgba(14, 165, 233, 0.1);
}

[data-theme="dark"] .theme-toggle,
[data-theme="dark"] .language-toggle {
  border-color: var(--neutral-200);
  background: var(--neutral-50);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .language-toggle:hover {
  background: var(--neutral-100);
}

.projects-page {
  width: min(100% - 32px, var(--page-container));
  padding: 2.7rem 0 4rem;
  margin: 0 auto;
}

.projects-hero {
  max-width: 760px;
  margin-bottom: 1.8rem;
}

.projects-kicker {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.projects-hero h1 {
  margin: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0;
}

.projects-hero p:last-child {
  max-width: 660px;
  margin: 1rem 0 0;
  color: var(--neutral-700);
  font-size: 0.975rem;
  line-height: 1.75;
}

.portfolio-grid {
  display: grid;
  gap: 1rem;
  grid-auto-rows: 17rem;
}

.portfolio-card {
  display: grid;
  grid-template-columns: minmax(15rem, 0.72fr) minmax(0, 1fr);
  gap: 1.1rem;
  align-items: stretch;
  padding: 1rem;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  background: var(--card-bg);
  box-shadow: 0 14px 34px rgba(30, 41, 59, 0.08);
  transition:
    box-shadow var(--transition),
    transform var(--transition),
    border-color var(--transition);
  height: 100%;
  box-sizing: border-box;
}

.portfolio-card:hover {
  border-color: rgba(14, 159, 178, 0.35);
  box-shadow: 0 22px 48px rgba(30, 41, 59, 0.15);
  transform: translateY(-2px);
}

.portfolio-thumb {
  overflow: hidden;
  min-height: 0;
  margin: 0;
  border-radius: 0.5rem;
  background:
    linear-gradient(135deg, rgba(14, 159, 178, 0.08), transparent 42%),
    var(--neutral-50);
}

.portfolio-thumb img,
.portfolio-thumb canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portfolio-thumb .kaleidoscope-cover {
  object-position: 50% 40%;
}

.portfolio-copy {
  display: grid;
  align-content: center;
  min-width: 0;
}

.portfolio-type {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.25rem;
}

.portfolio-copy h2 {
  margin: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
}

.portfolio-copy p:not(.portfolio-type) {
  margin: 0.75rem 0 0;
  color: var(--neutral-700);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.portfolio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.portfolio-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 1.7rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--neutral-100);
  border-radius: 0.25rem;
  color: var(--neutral-500);
  background: var(--neutral-50);
  font-size: 0.75rem;
  line-height: 1rem;
}

.projects-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, var(--page-container));
  padding: 1.5rem 0 2.5rem;
  margin: 0 auto;
  color: var(--neutral-500);
  font-size: 0.875rem;
}

.projects-footer a {
  color: var(--accent);
  font-weight: 500;
  transition: color var(--transition);
}

.projects-footer a:hover {
  color: var(--accent-dark);
}

@media (min-width: 640px) {
  .projects-nav,
  .projects-page,
  .projects-footer {
    width: min(100% - 48px, var(--page-container));
  }
}

@media (min-width: 1024px) {
  .projects-nav {
    width: min(100% - 64px, var(--nav-container));
  }

  .projects-page,
  .projects-footer {
    width: min(100% - 64px, var(--page-container));
  }

  .projects-brand {
    font-size: 1.375rem;
    line-height: 1.875rem;
  }
}

@media (max-width: 780px) {
  .portfolio-grid {
    grid-auto-rows: 30rem;
  }

  .portfolio-card {
    grid-template-columns: 1fr;
  }

  .portfolio-thumb {
    height: 13.5rem;
    min-height: 13.5rem;
  }
}

@media (max-width: 520px) {
  .projects-nav,
  .projects-page,
  .projects-footer {
    width: min(100% - 24px, var(--page-container));
  }

  .projects-page {
    padding-top: 1.8rem;
  }

  .projects-brand {
    min-width: 0;
    max-width: 9.5rem;
    overflow: hidden;
    font-size: 1.0625rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .projects-nav-links {
    flex-shrink: 0;
    gap: 0.35rem;
  }

  .theme-toggle,
  .language-toggle {
    height: 2.25rem;
    border-radius: 0.45rem;
  }

  .theme-toggle {
    width: 2.25rem;
  }

  .language-toggle {
    min-width: 3.125rem;
    padding: 0 0.4rem;
  }

  .projects-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}