:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-secondary: #4b5563;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-background: #ffffff;
  --color-background-alt: #f9fafb;
  --color-border: #e5e7eb;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #0ea5e9;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-background);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

ul {
  list-style-position: inside;
  margin-bottom: 1rem;
}

/* Header styles */
header {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  color: var(--color-text);
  text-decoration: none;
}

.logo h1 {
  font-size: 1.5rem;
  margin-bottom: 0;
}

nav ul {
  display: flex;
  list-style: none;
  margin-bottom: 0;
}

nav li {
  margin-left: 1.5rem;
}

nav a {
  color: var(--color-text);
  font-weight: 500;
}

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

/* Main content styles */
main {
  padding: 2rem 0;
  min-height: calc(100vh - 160px);
}

/* Footer styles */
footer {
  background-color: var(--color-background);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

/* Changelog list styles */
.changelog-list {
  margin-bottom: 2rem;
}

.changelog-item {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.changelog-header {
  margin-bottom: 1rem;
}

.changelog-header h3 {
  margin-bottom: 0.5rem;
}

.changelog-date {
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.changelog-summary {
  margin-bottom: 1rem;
}

.changelog-categories {
  list-style: none;
}

.changelog-categories li {
  margin-bottom: 0.5rem;
}

.more-entries {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.changelog-link {
  margin-top: 1rem;
}

.btn-view-details {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 0.25rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background-color 0.2s;
}

.btn-view-details:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
}

/* Changelog detail styles */
.changelog-detail {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.changelog-detail-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.back-link {
  margin-bottom: 1rem;
}

.btn-back {
  color: var(--color-text-light);
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
}

.changelog-detail-date {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.changelog-detail-timerange {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: 0;
}

.changelog-category {
  margin-bottom: 2rem;
}

.changelog-category h3 {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.changelog-items {
  margin-top: 1rem;
  list-style-type: disc;
  padding-left: 1.5rem;
}

.changelog-items li {
  margin-bottom: 0.75rem;
}

/* Empty state styles */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  background-color: var(--color-background-alt);
  border-radius: 0.5rem;
  color: var(--color-text-light);
}

.empty-state h3 {
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.empty-state pre {
  margin: 1rem auto;
  display: inline-block;
  text-align: left;
  background-color: var(--color-background);
  padding: 1rem;
  border-radius: 0.25rem;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

/* Error styles */
.error-container {
  text-align: center;
  padding: 3rem 1.5rem;
}

.error-actions {
  margin-top: 2rem;
}

.btn-primary {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 0.25rem;
  font-weight: 500;
  transition: background-color 0.2s;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
}

.error-stack {
  margin-top: 2rem;
  text-align: left;
  background-color: var(--color-background-alt);
  padding: 1rem;
  border-radius: 0.25rem;
  overflow: auto;
  font-size: 0.875rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  nav ul {
    margin-top: 1rem;
  }
  
  nav li:first-child {
    margin-left: 0;
  }
  
  .changelog-detail {
    padding: 1.5rem;
  }
}

/* Repository styles */
.repositories-list {
  margin-bottom: 2rem;
}

.repository-item {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.repository-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.repository-header h2 {
  margin-bottom: 0.5rem;
  margin-right: 1rem;
}

.repo-url {
  display: inline-flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.external-icon {
  margin-left: 0.25rem;
  font-size: 0.75rem;
}

.repository-meta {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.repository-actions {
  margin-top: 1rem;
}

.btn-repository {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 0.25rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background-color 0.2s;
}

.btn-repository:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
}

.repo-selector select {
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-background);
  font-size: 0.875rem;
  color: var(--color-text);
}

.repo-external-link {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.changelog-actions {
  margin-top: 1rem;
}

.btn-download {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--color-secondary);
  color: white;
  border-radius: 0.25rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background-color 0.2s;
}

.btn-download:hover {
  background-color: var(--color-text);
  text-decoration: none;
}

.empty-state-full {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 50vh;
  padding: 2rem;
}

.empty-state-content {
  max-width: 600px;
}

.empty-state-help {
  margin-top: 2rem;
  text-align: left;
  background-color: var(--color-background-alt);
  padding: 1.5rem;
  border-radius: 0.5rem;
}