/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.5;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Header */
.header {
  padding: var(--spacing-4) 0;
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-6);
}

.site-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Main Content */
.main {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-4) 0;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

/* Card */
.card {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-content {
  padding: var(--spacing-3);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  color: var(--color-text);
}

.card-description {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-3);
  font-size: 0.875rem;
}

.card-button {
  display: inline-block;
  padding: var(--spacing-2) var(--spacing-3);
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-3);
}

.card-button:hover {
  background-color: var(--color-primary-dark);
}

/* Card Extra Content */
.card-extra {
  margin-top: var(--spacing-3);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-3);
}

.card-paragraph {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-3);
}

/* Accordion */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  background: none;
  border: none;
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s ease;
}

.accordion-header:hover {
  background-color: var(--color-background);
}

.accordion-icon {
  font-size: 1.25rem;
  transition: transform 0.2s ease;
}

.accordion-header.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 var(--spacing-3);
}

.accordion-content.active {
  max-height: 200px;
  padding: var(--spacing-3);
}

/* Footer */
.footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-4) 0;
  text-align: center;
  color: var(--color-text-light);
}

/* Responsive Design */
@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }
}