:root {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --secondary: #6b7280;
  --secondary-hover: #4b5563;
  --success: #10b981;
  --success-hover: #059669;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #f59e0b;
  --bg: #f9fafb;
  --card-bg: #ffffff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Hero Section */
.hero {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: #f3f4f6;
  border-radius: var(--radius);
  width: 100%;
  max-width: 400px;
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--secondary);
  animation: pulse 2s infinite;
}

.status-indicator.connected {
  background: var(--success);
  animation: none;
}

.status-indicator.disconnected {
  background: var(--danger);
  animation: none;
}

.status-indicator.checking {
  background: var(--warning);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

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

/* Connection Form Section */
.connection-form {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

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

.form-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.btn-icon {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.25rem;
  line-height: 1;
  transition: color 0.15s ease;
}

.btn-icon:hover {
  color: var(--text);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.ip-input-group {
  display: flex;
  gap: 0.75rem;
}

.ip-input-group input {
  flex: 1;
}

input[type="text"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  background: white;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.readonly-input {
  background: #f3f4f6 !important;
  color: var(--text-muted);
  cursor: not-allowed;
}

.readonly-input:focus {
  border-color: var(--border);
  box-shadow: none;
}

.model-select-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.model-search {
  margin-bottom: 0.25rem;
}

#modelSelect {
  min-height: 150px;
}

#modelSelect option {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
}

#modelSelect option:hover {
  background: #eff6ff;
}

#modelSelect option:checked {
  background: var(--primary);
  color: white;
}

.test-status {
  margin-left: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.test-status.testing {
  color: var(--warning);
}

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

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

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* Saved Connections Section */
.saved-connections {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.saved-connections h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.saved-connections-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.saved-connection-card {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: box-shadow 0.15s ease;
}

.saved-connection-card:hover {
  box-shadow: var(--shadow);
}

.saved-connection-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.saved-connection-name {
  font-weight: 600;
  font-size: 1rem;
}

.saved-connection-provider {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: #e5e7eb;
  color: var(--text-muted);
  text-transform: capitalize;
}

.saved-connection-description {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.saved-connection-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.saved-connection-actions {
  display: flex;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-secondary {
  background: white;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  background: #f9fafb;
  border-color: var(--secondary);
}

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

.btn-danger:hover:not(:disabled) {
  background: var(--danger-hover);
}

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

.btn-success:hover:not(:disabled) {
  background: var(--success-hover);
}

.btn-icon {
  font-size: 1rem;
}

/* Empty State */
.empty-state {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
  padding: 2rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  background: #1f2937;
  color: white;
  border-radius: var(--radius);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  transform: translateY(150%);
  transition: transform 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

.toast.warning {
  background: var(--warning);
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

  .hero {
    padding: 1.5rem;
  }

  .ip-input-group {
    flex-direction: column;
  }

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

  .form-actions .btn {
    width: 100%;
  }

  .saved-connection-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .saved-connection-actions {
    flex-direction: column;
  }

  .saved-connection-actions .btn {
    width: 100%;
  }
}

/* Auth Overlay */
.auth-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
}

.auth-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.auth-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.auth-card p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.auth-error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: 0.75rem;
}