/**
 * Smart Lock Comparator - Vanilla CSS
 * Optimized for performance and SEO
 */

/* ===== CSS Variables ===== */
:root {
    --slc-primary: #4F46E5;
    --slc-primary-dark: #4338CA;
    --slc-primary-light: #EEF2FF;
    --slc-primary-border: #C7D2FE;
    
    --slc-slate-50: #F8FAFC;
    --slc-slate-100: #F1F5F9;
    --slc-slate-200: #E2E8F0;
    --slc-slate-300: #CBD5E1;
    --slc-slate-500: #64748B;
    --slc-slate-600: #475569;
    --slc-slate-700: #334155;
    --slc-slate-800: #1E293B;
    --slc-slate-900: #0F172A;
    
    --slc-white: #FFFFFF;
    --slc-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --slc-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --slc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --slc-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --slc-radius: 12px;
    --slc-radius-lg: 16px;
    --slc-transition: all 0.3s ease;
}

/* ===== Base Styles ===== */
.slc-wrapper {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--slc-slate-800);
    background-color: var(--slc-slate-100);
    padding-bottom: 100px;
    line-height: 1.6;
}

.slc-wrapper * {
    box-sizing: border-box;
}

/* ===== Header ===== */
.slc-header {
    background: var(--slc-white);
    border-bottom: 1px solid var(--slc-slate-200);
    position: sticky;
    top: 0;
    z-index: 30;
    box-shadow: var(--slc-shadow-sm);
}

.slc-header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.slc-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slc-header-icon {
    font-size: 1.5rem;
    color: var(--slc-primary);
}

.slc-header-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--slc-slate-900);
    margin: 0;
    letter-spacing: -0.025em;
}

.slc-highlight {
    color: var(--slc-primary);
}

.slc-header-right {
    font-size: 0.75rem;
    color: var(--slc-slate-500);
    display: none;
}

.slc-date {
    font-weight: 600;
    color: var(--slc-slate-700);
}

@media (min-width: 768px) {
    .slc-header-right {
        display: block;
    }
}

/* ===== Filters Section ===== */
.slc-filters-section {
    max-width: 1280px;
    margin: 2rem auto;
    padding: 0 1rem;
    background: var(--slc-white);
    border-radius: var(--slc-radius-lg);
    box-shadow: var(--slc-shadow-sm);
    border: 1px solid var(--slc-slate-200);
    padding: 1.5rem;
}

.slc-filters-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.slc-filters-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slc-slate-800);
    margin: 0;
}

.slc-filters-subtitle {
    font-size: 0.875rem;
    color: var(--slc-slate-500);
    margin: 0;
}

.slc-reset-btn {
    font-size: 0.875rem;
    color: var(--slc-slate-500);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
    align-self: flex-start;
}

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

@media (min-width: 768px) {
    .slc-filters-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.slc-filters-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .slc-filters-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.slc-filter-group {
    display: flex;
    flex-direction: column;
}

.slc-filter-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--slc-slate-500);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
    letter-spacing: 0.05em;
}

.slc-select {
    width: 100%;
    padding: 0.625rem;
    background: var(--slc-slate-50);
    border: 1px solid var(--slc-slate-200);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slc-slate-800);
    font-family: inherit;
    outline: none;
    transition: var(--slc-transition);
}

.slc-select:focus {
    border-color: var(--slc-primary);
    box-shadow: 0 0 0 3px var(--slc-primary-light);
}

/* ===== Grid Header ===== */
.slc-grid-header {
    max-width: 1280px;
    margin: 0 auto 1rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.slc-grid-title {
    font-weight: 700;
    color: var(--slc-slate-700);
    margin: 0;
    font-size: 1rem;
}

.slc-legend {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--slc-slate-600);
}

.slc-legend span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.slc-legend-icon {
    color: var(--slc-primary);
}

/* ===== Products Grid ===== */
.slc-products-grid {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .slc-products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .slc-products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .slc-products-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== Product Card ===== */
.slc-product-card {
    background: var(--slc-white);
    border-radius: var(--slc-radius);
    border: 1px solid var(--slc-slate-200);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--slc-transition);
}

.slc-product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--slc-shadow-lg);
    border-color: var(--slc-slate-300);
}

.slc-card-checkbox {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 10;
}

.slc-card-checkbox label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.slc-card-checkbox input {
    display: none;
}

.slc-checkbox-visual {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: 1px solid var(--slc-slate-300);
    background: var(--slc-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--slc-transition);
    box-shadow: var(--slc-shadow-sm);
}

.slc-checkbox-visual:hover {
    border-color: var(--slc-primary);
}

.slc-card-checkbox input:checked + .slc-checkbox-visual {
    background: var(--slc-primary);
    border-color: var(--slc-primary);
}

.slc-check-icon {
    width: 16px;
    height: 16px;
    color: var(--slc-white);
    display: none;
    pointer-events: none;
}

.slc-card-checkbox input:checked + .slc-checkbox-visual .slc-check-icon {
    display: block;
}

.slc-compare-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--slc-slate-500);
    opacity: 0;
    transition: opacity 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.slc-product-card:hover .slc-compare-label {
    opacity: 1;
}

.slc-card-clickable {
    cursor: pointer;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.slc-card-image {
    height: 176px;
    background: var(--slc-slate-50);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.slc-card-image img {
    max-height: 100%;
    object-fit: contain;
    mix-blend-mode: multiply;
    opacity: 0.9;
}

.slc-card-tags {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.slc-tag {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.125rem 0.5rem;
    background: var(--slc-white);
    border: 1px solid var(--slc-slate-200);
    border-radius: 4px;
    color: var(--slc-slate-600);
    box-shadow: var(--slc-shadow-sm);
}

.slc-card-content {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.slc-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.slc-brand {
    font-size: 0.625rem;
    font-weight: 800;
    color: var(--slc-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 0.125rem 0;
}

.slc-product-name {
    font-weight: 700;
    color: var(--slc-slate-800);
    line-height: 1.3;
    margin: 0;
    font-size: 1rem;
}

.slc-price {
    font-weight: 700;
    color: var(--slc-slate-900);
    background: var(--slc-slate-100);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
}

.slc-features {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.slc-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--slc-slate-50);
    color: var(--slc-slate-500);
    transition: var(--slc-transition);
    border: 1px solid var(--slc-slate-200);
    font-size: 0.875rem;
}

.slc-feature-icon.active {
    background: var(--slc-primary-light);
    color: var(--slc-primary);
    border-color: var(--slc-primary-border);
    font-weight: bold;
}

.slc-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.75rem;
    border-top: 1px solid var(--slc-slate-100);
    margin-top: auto;
}

.slc-install-type {
    font-size: 0.75rem;
    color: var(--slc-slate-500);
    font-weight: 500;
}

.slc-view-link {
    font-size: 0.75rem;
    color: var(--slc-primary);
    font-weight: 700;
}

.slc-view-link:hover {
    text-decoration: underline;
}

/* Hidden SEO content */
.slc-seo-content {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===== Compare Bar ===== */
.slc-compare-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--slc-white);
    border-top: 1px solid var(--slc-slate-200);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    z-index: 40;
}

.slc-compare-bar.active {
    transform: translateY(0);
}

.slc-compare-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.slc-compare-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.slc-compare-badge {
    background: var(--slc-primary);
    color: var(--slc-white);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

.slc-compare-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--slc-slate-800);
    margin: 0;
}

.slc-compare-subtitle {
    font-size: 0.75rem;
    color: var(--slc-slate-500);
    margin: 0;
    display: none;
}

@media (min-width: 640px) {
    .slc-compare-subtitle {
        display: block;
    }
}

.slc-compare-actions {
    display: flex;
    gap: 0.75rem;
}

.slc-btn-secondary {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--slc-slate-500);
    background: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: var(--slc-transition);
}

.slc-btn-secondary:hover {
    background: var(--slc-slate-50);
}

.slc-btn-primary {
    padding: 0.5rem 1.5rem;
    background: var(--slc-primary);
    color: var(--slc-white);
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    transition: var(--slc-transition);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

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

/* ===== Modals ===== */
.slc-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 50;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.slc-modal.active {
    display: flex;
}

.slc-modal-content {
    background: var(--slc-white);
    border-radius: var(--slc-radius-lg);
    width: 100%;
    max-width: 672px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--slc-shadow-xl);
    position: relative;
    animation: slcModalFadeIn 0.2s ease-out;
}

.slc-modal-wide {
    max-width: 1152px;
}

@keyframes slcModalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.slc-modal-header {
    padding: 1rem;
    border-bottom: 1px solid var(--slc-slate-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--slc-slate-50);
}

.slc-modal-title {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--slc-slate-800);
    margin: 0;
}

.slc-modal-close {
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--slc-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.slc-modal-close:hover {
    background: var(--slc-slate-200);
}

.slc-modal-close-absolute {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    background: var(--slc-slate-100);
}

.slc-modal-close-absolute:hover {
    background: var(--slc-slate-200);
}

.slc-modal-body {
    padding: 0;
}

.slc-table-container {
    overflow: auto;
}

/* ===== Comparison Table ===== */
.slc-compare-table {
    width: 100%;
    text-align: left;
    font-size: 0.875rem;
    border-collapse: collapse;
}

.slc-compare-table thead {
    background: var(--slc-slate-50);
    color: var(--slc-slate-500);
}

.slc-compare-table th,
.slc-compare-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--slc-slate-100);
}

.slc-compare-table th:first-child,
.slc-compare-table td:first-child {
    position: sticky;
    left: 0;
    background: var(--slc-white);
    font-weight: 700;
    color: var(--slc-slate-500);
    z-index: 10;
    width: 128px;
}

.slc-compare-table th {
    min-width: 200px;
    border-left: 1px solid var(--slc-slate-100);
}

.slc-compare-table td {
    border-left: 1px solid var(--slc-slate-100);
    vertical-align: top;
}

.slc-compare-table tbody tr:hover {
    background: var(--slc-slate-50);
}

/* ===== Product Modal ===== */
.slc-product-modal-image {
    height: 192px;
    background: var(--slc-slate-100);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slc-product-modal-image img {
    height: 160px;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.slc-product-modal-body {
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .slc-product-modal-body {
        padding: 2rem;
    }
}

.slc-pm-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.slc-pm-brand {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--slc-primary);
    text-transform: uppercase;
    background: var(--slc-primary-light);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
}

.slc-pm-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--slc-slate-900);
    margin: 0.5rem 0 0 0;
}

.slc-pm-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--slc-slate-900);
    margin: 0;
}

.slc-pm-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.slc-pm-feature {
    text-align: center;
    padding: 0.5rem;
    background: var(--slc-slate-50);
    border-radius: 8px;
    border: 1px solid var(--slc-slate-100);
}

.slc-pm-feature i {
    font-size: 1.5rem;
    color: var(--slc-slate-300);
    margin-bottom: 0.25rem;
    display: block;
}

.slc-pm-feature i.active {
    color: var(--slc-primary);
}

.slc-pm-feature p {
    font-size: 0.625rem;
    font-weight: 700;
    color: var(--slc-slate-500);
    text-transform: uppercase;
    margin: 0;
}

.slc-pm-desc {
    color: var(--slc-slate-600);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.slc-pm-verdict-section {
    margin-bottom: 1.5rem;
}

.slc-pm-verdict-title {
    font-weight: 700;
    color: var(--slc-slate-900);
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
}

.slc-pm-verdict-box {
    background: var(--slc-primary-light);
    border-left: 4px solid var(--slc-primary);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
}

.slc-pm-verdict {
    color: var(--slc-primary-dark);
    font-style: italic;
    font-size: 0.875rem;
    margin: 0;
    line-height: 1.6;
}

/* ===== Hidden Products (for filtering) ===== */
.slc-product-card.hidden {
    display: none;
}

/* ===== Print Styles ===== */
@media print {
    .slc-header,
    .slc-filters-section,
    .slc-compare-bar,
    .slc-modal,
    .slc-card-checkbox {
        display: none !important;
    }
    
    .slc-product-card {
        break-inside: avoid;
    }
}