/* ================================
   COMPONENTS - Reusable UI Elements
   ================================ */

/* ---- Site Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(250, 250, 250, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-light);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* ===========================================
   LOGO HOVER REVEAL EFFECT
   - "Riess" expands to "Stephan Riess" on hover
   - Uses max-width transition on hidden portion
   - Adjust --logo-reveal-width if name length changes
   - Adjust transition duration for speed
   =========================================== */

.site-nav__logo {
  display: inline-flex;
  align-items: center;
  font-weight: 400;
  font-size: 1.375rem;
  text-decoration: none;
  color: var(--color-gray);
  transition: color 0.2s ease;
}

.site-nav__logo:hover {
  color: var(--color-primary);
}

.site-nav__logo.active {
  color: var(--color-primary);
}

/* Hidden portion that reveals on hover */
.logo-reveal {
  display: inline-block;
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width 0.6s ease-in-out,
              margin-right 0.6s ease-in-out;
  margin-right: 0;
}

/* Revealed state on hover */
.site-nav__logo:hover .logo-reveal {
  max-width: 120px;
  margin-right: 0.3em;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-32);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link {
  color: var(--color-gray);
  font-weight: 400;
  font-size: 1rem;
  text-decoration: none;
  transition: color 0.2s ease;
  padding-bottom: var(--space-4);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 400;
  border-bottom: 2px dotted var(--color-primary);
}

/* Mobile nav */
@media (max-width: 768px) {
  .site-nav__list {
    gap: var(--space-16);
  }
  
  .nav-link {
    font-size: 0.875rem;
  }
}

/* ---- Page Header ---- */
.page-header {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.page-header h1 {
  color: var(--color-primary);
}

.page-header__subtitle {
  color: var(--color-gray);
  margin-top: var(--space-8);
}

/* ---- Cards ---- */
.card {
  background: white;
  border: none;
  border-radius: 0 0 32px 0;
  padding: var(--space-32);
  padding-bottom: var(--space-64); /* Space for icon */
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  display: block;
  color: inherit;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  color: inherit;
}

.card__title {
  color: var(--color-text);
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
}

.card__subtitle {
  color: var(--color-gray);
  font-size: 0.875rem;
  margin-bottom: var(--space-16);
}

.card__description {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.5;
}

.card__icon {
  position: absolute;
  bottom: var(--space-24);
  right: var(--space-24);
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.25rem;
  transition: all 0.2s ease;
}

.card:hover .card__icon {
  background-color: var(--color-primary);
  color: white;
  transform: scale(1.05);
}

/* ---- Back Link ---- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
  margin-bottom: var(--space-32);
}

.back-link:hover {
  color: var(--color-secondary);
}

.back-link__icon {
  width: 32px;
  height: 32px;
  border: 2px solid currentColor;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.back-link:hover .back-link__icon {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ---- Image Placeholder ---- */
.image-placeholder {
  width: 100%;
  background-color: var(--color-light);
  border-radius: 4px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray);
  margin: var(--space-32) 0;
}

/* Responsive image placeholder heights */
@media (min-width: 768px) {
  .image-placeholder {
    min-height: 300px;
  }
}

@media (min-width: 1200px) {
  .image-placeholder {
    min-height: 400px;
  }
}

/* ---- Actual Images ---- */
.case-study-image {
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin: var(--space-32) 0;
  cursor: zoom-in;
  transition: transform 0.2s ease;
}

.case-study-image:hover {
  transform: scale(1.02);
}

/* Full-width image option */
.case-study-image--full {
  border-radius: 0;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  width: 100vw;
  max-width: 100vw;
}

@media (min-width: 1920px) {
  .case-study-image--full {
    max-width: 1680px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ---- Footer ---- */
.site-footer {
  padding: var(--space-32) 0;
  border-top: 1px solid var(--color-light);
}

.site-footer .container {
  text-align: right;
  color: var(--color-gray);
  font-size: 0.875rem;
}