:root {
  --primary-color: #1a73e8;
  --primary-hover: #1557b0;
  --secondary-color: #5f6368;
  --error-color: #d93025;
  --success-color: #0f9d58;
  --background: #f8f9fa;
  --card-background: #ffffff;
  --border-color: #dadce0;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.card {
  background: var(--card-background);
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.card.error {
  border-left: 4px solid var(--error-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group input:invalid:not(:placeholder-shown) {
  border-color: var(--error-color);
}

.error-message {
  display: block;
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  min-height: 1.25rem;
}

.checkbox-group {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-weight: 400;
}

.checkbox-label input[type='checkbox'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-options {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-weight: 400;
}

.toggle-label input[type='checkbox'] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.toggle-text {
  color: var(--text-primary);
}

.toggle-hint {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.toggle-status {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toggle-status.ready {
  color: var(--success-color);
}

.toggle-status.error {
  color: var(--error-color);
}

.form-actions {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    background-color 0.2s,
    transform 0.1s;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-primary:disabled {
  background-color: var(--border-color);
  cursor: not-allowed;
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: white;
}

.btn-secondary:hover {
  background-color: #4a4d50;
}

.progress-container {
  text-align: center;
}

.progress-bar-wrapper {
  width: 100%;
  height: 8px;
  background-color: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.progress-bar {
  height: 100%;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.progress-details {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.results-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.chart-container {
  position: relative;
  height: 400px;
  margin-bottom: 0.5rem;
}

.chart-hint {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-background);
  border-radius: 8px;
  max-width: 800px;
  max-height: 80vh;
  width: 90%;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 2rem;
  overflow-y: auto;
}

.post-item {
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.post-item:last-child {
  margin-bottom: 0;
}

.post-author {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.post-author-handle {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.875rem;
}

.post-text {
  margin-bottom: 0.5rem;
  white-space: pre-wrap;
}

.post-link {
  font-size: 0.875rem;
  color: var(--primary-color);
  text-decoration: none;
}

.post-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .container {
    padding: 1rem 0.5rem;
  }

  .card {
    padding: 1.5rem;
  }

  header h1 {
    font-size: 2rem;
  }

  .form-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .modal-content {
    width: 95%;
    max-height: 90vh;
  }

  .modal-header,
  .modal-body {
    padding: 1rem;
  }
}