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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #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);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

.tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
}

.tab-button {
    flex: 1;
    padding: 16px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.tab-button:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--bg-primary);
}

.tab-content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-container h2 {
    font-size: 1.75rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.form-help {
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.submit-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:active {
    transform: translateY(0);
}

.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    margin: 20px 30px;
    padding: 16px 20px;
    background: #fef2f2;
    border-left: 4px solid var(--danger-color);
    border-radius: 8px;
    color: var(--danger-color);
    font-weight: 500;
}

.results-container {
    margin: 30px;
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    border: 2px solid var(--border-color);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.results-header h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

.vehicle-info {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
}

.vehicle-info h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.info-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.recall-summary {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.recall-count {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.recall-count.has-recalls {
    color: var(--danger-color);
}

.recall-count.no-recalls {
    color: var(--secondary-color);
}

.recall-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--danger-color);
    box-shadow: var(--shadow);
}

.recall-item h4 {
    color: var(--danger-color);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.recall-item p {
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.6;
}

.recall-item strong {
    color: var(--text-primary);
}

footer {
    text-align: center;
    padding: 30px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    text-decoration: underline;
}

footer p {
    margin: 5px 0;
}

/* Subscription Section */
.subscription-section {
    margin-top: 30px;
    padding: 25px;
    background: white;
    border-radius: 8px;
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow);
}

.subscription-section h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.subscription-help {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.notification-options {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.subscription-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.cancel-btn {
    padding: 14px 24px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cancel-btn:hover {
    background: var(--border-color);
    border-color: var(--text-secondary);
}

.subscription-status {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-weight: 500;
}

.subscription-status.success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--secondary-color);
}

.subscription-status.error {
    background: #fef2f2;
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.subscription-active {
    padding: 20px;
    background: #d1fae5;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
}

.subscription-active h4 {
    color: #065f46;
    margin-bottom: 10px;
}

.subscription-active p {
    color: var(--text-primary);
    margin-bottom: 15px;
    line-height: 1.8;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .tab-button {
        padding: 12px 16px;
        font-size: 0.9rem;
    }

    .tab-content {
        padding: 20px;
    }

    .form-container h2 {
        font-size: 1.5rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .results-container {
        margin: 20px;
        padding: 20px;
    }

    .results-header h2 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .tabs {
        flex-direction: column;
    }

    .tab-button {
        border-bottom: 1px solid var(--border-color);
        border-right: none;
    }

    .tab-button.active {
        border-bottom: 1px solid var(--border-color);
        border-left: 3px solid var(--primary-color);
    }
}