/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #050608;
    --bg-secondary: #0f1218;
    --bg-tertiary: #181c24;
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --accent-blue: #1e3a5f;
    --accent-blue-light: #2a4d7a;
    --accent-blue-dark: #0f1f33;
    --accent-blue-muted: #162538;
    --border-color: #2a3140;
    --success: #2d5a3d;
    --warning: #5a4d2d;
    --error: #5a2d2d;
    --info: #2d3d5a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent-blue);
    color: var(--text-primary);
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.3s;
    font-family: inherit;
}

.btn:hover {
    background-color: var(--accent-blue-light);
}

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

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

.btn-secondary:hover {
    background-color: #2d2d2d;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-icon {
    width: 24px;
    height: 24px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-primary);
}

/* Trust Section */
.trust-section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

.trust-section h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.trust-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.trust-card h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.trust-card p {
    color: var(--text-secondary);
}

/* How It Works */
.how-it-works {
    padding: 4rem 0;
}

.how-it-works h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step p {
    color: var(--text-secondary);
}

/* Pricing */
.pricing-preview,
.pricing-section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

.pricing-preview h3,
.pricing-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card.featured {
    border: 2px solid var(--accent-blue);
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background-color: var(--accent-blue);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-card h3,
.pricing-card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: "✓ ";
    color: var(--accent-blue);
    font-weight: bold;
    margin-right: 0.5rem;
}

.pricing-faq {
    margin-top: 4rem;
}

.pricing-faq h3 {
    text-align: center;
    margin-bottom: 2rem;
}

.faq-item {
    background-color: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.faq-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.faq-item p {
    color: var(--text-secondary);
}

/* Questionnaire */
.questionnaire-section {
    padding: 3rem 0;
    max-width: 800px;
    margin: 0 auto;
}

.questionnaire-section h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.questionnaire-form {
    margin-top: 2rem;
}

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

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

.form-group select,
.form-group input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Results */
.results-section {
    padding: 3rem 0;
}

.assessment-results {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
}

.assessment-section {
    margin-bottom: 2rem;
}

.assessment-section:last-child {
    margin-bottom: 0;
}

.assessment-section h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-blue);
}

.assessment-section h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.assessment-section p,
.assessment-section li {
    color: var(--text-secondary);
    line-height: 1.8;
}

.assessment-section ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.assessment-section li {
    margin-bottom: 0.5rem;
}

.confidence-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.confidence-high {
    background-color: var(--success);
    color: var(--text-primary);
}

.confidence-medium {
    background-color: var(--warning);
    color: var(--text-primary);
}

.confidence-low {
    background-color: var(--error);
    color: var(--text-primary);
}

.recipe-badge {
    display: inline-block;
    background-color: var(--accent-blue);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 1rem;
}

/* Chat */
.chat-section {
    margin-top: 3rem;
}

.chat-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.chat-container {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.chat-messages {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.chat-message {
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 8px;
    max-width: 80%;
}

.bot-message {
    background-color: var(--bg-tertiary);
    margin-right: auto;
}

.user-message {
    background-color: var(--accent-blue-dark);
    margin-left: auto;
    text-align: right;
}

.chat-message p {
    margin: 0;
    color: var(--text-primary);
    line-height: 1.6;
}

.chat-input-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.chat-input {
    flex: 1;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
}

.chat-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.chat-subscription-notice {
    background-color: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.chat-subscription-notice p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.chat-subscription-notice a {
    color: var(--accent-blue);
    text-decoration: none;
}

.chat-subscription-notice a:hover {
    text-decoration: underline;
}

.chat-message a {
    color: var(--accent-blue-light);
    text-decoration: underline;
}

.chat-message a:hover {
    color: var(--text-primary);
}

.chat-section-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: -0.5rem 0 1rem 0;
}

.chat-bar-section {
    margin-top: 3rem;
    padding-bottom: 2rem;
}

.chat-bar {
    position: relative;
}

.buy-parts-cta {
    margin-top: 1.5rem;
}

.results-actions {
    margin-bottom: 1.5rem;
}

.results-actions a {
    color: var(--accent-blue-light);
    text-decoration: none;
    margin-right: 1rem;
}

.results-actions a:hover {
    text-decoration: underline;
}

.question-count {
    color: var(--text-primary);
    font-weight: 500;
}

/* Store */
.store-section {
    padding: 3rem 0;
}

.store-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    font-size: 0.9rem;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--accent-blue);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.product-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
}

.product-image {
    width: 100%;
    height: 200px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-image .tire-svg {
    width: 80px;
    height: 48px;
    color: var(--accent-blue);
    opacity: 0.8;
}
.product-image-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}
.product-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.product-card .product-price {
    color: var(--accent-blue);
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.product-card .product-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.product-card .product-specs {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.product-card .btn {
    width: 100%;
    text-align: center;
}

.product-guide-link {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.product-guide-link a {
    color: var(--accent-blue-light);
    text-decoration: none;
}

.product-guide-link a:hover {
    text-decoration: underline;
}

.store-price {
    color: var(--accent-blue);
    font-weight: 600;
}

.store-price a {
    color: var(--accent-blue-light);
    text-decoration: none;
    font-weight: 500;
}

.store-price a:hover {
    text-decoration: underline;
}

.store-loading {
    color: var(--text-secondary);
    text-align: center;
    padding: 3rem 1rem;
}

/* Part detail modal */
.part-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.part-modal.is-open {
    opacity: 1;
    visibility: visible;
}

.part-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    cursor: pointer;
}

.part-modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
}

.part-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

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

.part-modal-content h2 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.part-modal-content .part-modal-meta {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.part-modal-gallery {
    min-height: 120px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.part-modal-risk {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.part-modal-risk h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.part-modal-risk.risk-info {
    border-left: 3px solid var(--info);
}

.part-modal-risk.risk-warning {
    border-left: 3px solid var(--warning);
}

.part-modal-risk.risk-danger {
    border-left: 3px solid var(--error);
}

/* Risk badge styles */
.risk-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.risk-badge.risk-info {
    background-color: var(--info);
    color: var(--text-primary);
}

.risk-badge.risk-warning {
    background-color: var(--warning);
    color: var(--text-primary);
}

.risk-badge.risk-danger {
    background-color: var(--error);
    color: var(--text-primary);
}

.part-modal-reviews {
    margin-bottom: 1.5rem;
}

.part-modal-reviews h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.part-modal-reviews-empty {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-card-clickable {
    cursor: pointer;
}

.product-card-clickable:hover {
    border-color: var(--accent-blue);
}

/* Pages index & article content */
.pages-index-section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

.pages-index-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.page-card {
    display: block;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.page-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.25);
}

.page-card h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.page-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.page-section {
    padding: 3rem 0 4rem;
}

.page-back {
    margin-bottom: 1.5rem;
}

.page-back a {
    color: var(--accent-blue-light);
    text-decoration: none;
    font-size: 0.95rem;
}

.page-back a:hover {
    text-decoration: underline;
}

.page-content {
    max-width: 720px;
    margin: 0 auto;
}

.page-content h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-blue);
}

.page-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.page-content h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.page-content p {
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 1rem;
}

.page-content ul {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.page-content li {
    margin-bottom: 0.35rem;
    line-height: 1.6;
}

.spec-list {
    list-style: none;
    padding-left: 0;
}

.spec-list li {
    margin-bottom: 0.25rem;
}

.table-wrap {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.info-table th,
.info-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.info-table th {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
}

.info-table tbody tr:last-child td {
    border-bottom: none;
}

.info-table tbody tr:hover td {
    background-color: var(--accent-blue-muted);
}

.stripe-notice {
    background-color: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    margin-top: 2rem;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

    .nav {
        margin-top: 1rem;
        width: 100%;
        justify-content: center;
    }

    .pricing-card.featured {
        transform: none;
    }

    .chat-message {
        max-width: 90%;
    }
}