/* Light mode */
:root {
  --md-sys-color-primary: #0B57D0;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-surface: #F9F9FB;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-surface-container: #FFFFFF;
  --md-sys-color-outline: #79747E;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-primary: #A8C7FA;
    --md-sys-color-on-primary: #00315E;
    --md-sys-color-surface: #1C1B1F;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-container: #2B2930;
    --md-sys-color-outline: #938F99;
  }
}

/* Global styles */
body {
  font-family: 'Roboto', sans-serif;
  padding: 24px;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  transition: background 0.3s ease, color 0.3s ease;
}

h1 {
  text-align: center;
  margin-bottom: 32px;
}

/* Card layout */
.container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.card {
  background: var(--md-sys-color-surface-container);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.card-content {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
}

.card h2 {
  font-size: 1.25rem;
  margin: 8px 0 16px 0;
  color: var(--md-sys-color-on-surface);
}

/* Button style */
md-filled-button {
  --md-filled-button-container-color: var(--md-sys-color-primary);
  --md-filled-button-label-text-color: var(--md-sys-color-on-primary);
}

/* Dialog theme (Material 3 native) */
#linksDialog {
  --md-dialog-container-color: var(--md-sys-color-surface-container);
  --md-dialog-headline-color: var(--md-sys-color-on-surface);
  --md-dialog-supporting-text-color: var(--md-sys-color-on-surface);
  color: var(--md-sys-color-on-surface);
}

/* Dialog content formatting */
#dialogContent {
  font-size: 14px;
  line-height: 1.6;
  overflow-y: auto;
  max-height: 400px;
  padding-right: 8px;
}

#dialogContent a {
  color: #1a73e8;
  text-decoration: underline;
}

#dialogContent h1, 
#dialogContent h2, 
#dialogContent h3 {
  margin: 12px 0 8px 0;
}

#dialogContent strong {
  font-weight: 600;
}
/* --- Desktop optimization --- */
md-dialog#linksDialog {
  --md-dialog-container-max-width: 900px;
  --md-dialog-container-min-width: 600px;
  width: 80vw;
  max-width: 900px;
}
#dialogContent {
  padding: 16px 24px;
}
/* --- Button group --- */
.button-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  margin-top: 16px;
}

/* Desktop */
@media (min-width: 768px) {
  .button-group {
    flex-direction: row;
    justify-content: flex-end; /* or space-between */
    gap: 8px;
  }

  .button-group md-filled-button {
    width: auto;
    min-width: 120px;
  }
}