/* Color Scheme */
:root {
  --color-primary: #688ab1;
  --color-accent: #00539F;
  --color-alt-bg: #DCDCDC;
  --spacing-sm: 15px;
  --spacing-md: 30px;
  --spacing-lg: 60px;
}

/* Header */
.protocols-header {
  margin-bottom: var(--spacing-lg);
}

.protocols-header h1 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.header-divider,
.section-divider {
  height: 2px;
  background-color: var(--color-primary);
  border: none;
  width: 40%;
  margin: var(--spacing-md) 0;
}

/* ODK Section */
.odk-section {
  margin-bottom: var(--spacing-lg);
}

.protocol-link {
  text-decoration: none;
  color: var(--color-accent);
  transition: opacity 0.2s;
}

.protocol-link:hover {
  opacity: 0.8;
}

/* Grid Layout */
.protocols-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.protocols-grid > .protocol-card--large {
  grid-column: 1 / -1;
}

/* Protocol Cards */
.protocol-card {
  padding: var(--spacing-sm);
  border-radius: 4px;
  transition: box-shadow 0.2s;
}

.protocol-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.protocol-card--alt {
  background-color: var(--color-alt-bg);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.card-icon {
  max-width: 60px;
  height: auto;
  flex-shrink: 0;
}

.card-title {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin: 0;
  font-style: italic;
}

.card-description {
  text-align: justify;
  margin: var(--spacing-sm) 0;
  line-height: 1.6;
}

.card-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.card-links li {
  margin: 0.5rem 0;
}

.card-links a,
.video-trigger {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s;
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  padding: 0;
}

.card-links a:hover,
.video-trigger:hover {
  opacity: 0.8;
  text-decoration: underline;
}

/* Large Card Subsections */
.card-subsection {
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.card-subsection:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.card-subsection h3,
.card-subsection h4 {
  color: var(--color-accent);
  margin: var(--spacing-sm) 0;
  font-size: 1rem;
}

/* Video Modal */
.video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
}

.video-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-modal__content {
  position: relative;
  width: 90%;
  max-width: 800px;
}

.video-modal__close {
  position: absolute;
  right: -40px;
  top: 0;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-modal__iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
}

/* Protocol Figure */
.protocols-figure {
  margin: var(--spacing-lg) 0 0 0;
  text-align: center;
}

.protocols-figure img {
  max-width: 100%;
  height: auto;
  margin-bottom: var(--spacing-sm);
}

.protocols-figure figcaption {
  font-size: 0.875rem;
  color: #666;
}

/* Responsive Design */
@media (max-width: 768px) {
  .protocols-grid {
    grid-template-columns: 1fr;
  }

  .protocols-grid > .protocol-card--large {
    grid-column: 1;
  }

  .video-modal__close {
    right: 10px;
  }
}