:root {
  --bg-primary: #0d0d0d;
  --bg-secondary: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border-color: #333333;
  --font-serif: 'Playfair Display', serif;
  --font-sans: system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Main Container */
.container {
  width: 100%;
  max-width: 800px;
  padding: 8vh 2rem 5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

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

.title-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.title {
  font-size: 3.5rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--text-primary);
  letter-spacing: -1px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.2rem;
}

/* Form */
.form-group {
  display: flex;
  align-items: stretch;
  gap: 1rem;
}

.input {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1.2rem;
  padding: 0.8rem 1.2rem;
  width: 100%;
  max-width: 400px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.input:focus {
  border-color: var(--accent);
}

.input::placeholder {
  color: var(--text-secondary);
}

.button {
  background-color: var(--accent);
  border: none;
  border-radius: 6px;
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  padding: 0.8rem 1.5rem;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.button:hover:not(:disabled) {
  background-color: var(--accent-hover);
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: var(--border-color);
  color: var(--text-secondary);
}

.button-small {
  font-size: 1rem;
  padding: 0.6rem 1rem;
}

.error {
  color: #f87171;
  font-weight: 500;
  font-size: 1.1rem;
  padding: 1rem;
  border-radius: 6px;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

/* Repos Grid */
.repos-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.repo-card {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  cursor: pointer;
  padding: 1.2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.repo-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.repo-card.selected {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.05);
}

.checkbox {
  margin-top: 0.2rem;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.repo-card.selected .checkbox {
  border-color: var(--accent);
  background-color: var(--accent);
}

.repo-card.selected .checkbox::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 7px;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.repo-info {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.repo-name {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.repo-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.repo-meta {
  display: flex;
  gap: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  font-weight: 500;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.actions {
  display: flex;
  justify-content: flex-start;
  margin-top: 2rem;
}

/* Result Section */
.result-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

.serif-text {
  font-weight: 600;
  font-size: 2rem;
  font-family: var(--font-serif);
  color: var(--text-primary);
}

.url-box {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1rem 1.2rem;
  border-radius: 6px;
  word-break: break-all;
}

.url-box span {
  flex-grow: 1;
  font-family: monospace;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.preview-image {
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-secondary);
}