/**
 * Kitchen Versus Core Comparison Engine - Frontend Styles
 * Strict Performance Budget: < 15KB
 */

:root {
    --kv-primary: #ff9900;
    --kv-primary-dark: #e88b00;
    --kv-text: #1f2937;
    --kv-text-light: #6b7280;
    --kv-bg-light: #f9fafb;
    --kv-border: #e5e7eb;
    --kv-border-highlight: #d1d5db;
    --kv-green-bg: #ecfdf5;
    --kv-green-text: #065f46;
    --kv-green-border: #a7f3d0;
    --kv-teal-bg: #f0fdfa;
    --kv-teal-text: #115e59;
    --kv-teal-border: #99f6e4;
    --kv-blue-bg: #eff6ff;
    --kv-blue-text: #1e40af;
    --kv-blue-border: #bfdbfe;
    --kv-radius: 8px;
    --kv-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --kv-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   1. Comparison Table
   ========================================================================== */
.kv-comparison-wrap {
    margin: 2.5rem 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--kv-text);
    background: #ffffff;
    border-radius: var(--kv-radius);
    border: 1px solid var(--kv-border);
    box-shadow: var(--kv-shadow);
    overflow: hidden;
}

/* Toolbar */
.kv-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 1.25rem;
    background: #ffffff;
    border-bottom: 1px solid var(--kv-border);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.kv-toolbar-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--kv-text);
}

.kv-product-count {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--kv-text-light);
}

.kv-diff-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #374151;
    background: #f3f4f6;
    border: 1px solid #d1d5db;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.kv-diff-toggle-btn:hover {
    background: #e5e7eb;
    color: #111827;
}

.kv-diff-toggle-btn.is-active {
    background: #2563eb;
    color: #ffffff;
    border-color: #1d4ed8;
}

.kv-toggle-icon {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #9ca3af;
    transition: background 0.2s;
}

.kv-diff-toggle-btn.is-active .kv-toggle-icon {
    background: #6ee7b7;
}

/* Table Scroll Wrapper */
.kv-table-scroll-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

.kv-comparison-table {
    width: 100%;
    min-width: 600px;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
    background: #ffffff;
}

/* Headers */
.kv-comparison-table th,
.kv-comparison-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--kv-border);
    vertical-align: middle;
    font-size: 0.875rem;
}

.kv-comparison-table thead th {
    background: #ffffff;
    vertical-align: top;
    border-bottom: 2px solid var(--kv-border);
}

.kv-col-spec {
    width: 180px;
    min-width: 150px;
    font-weight: 700;
    color: var(--kv-text);
    background: var(--kv-bg-light);
}

.kv-col-product {
    min-width: 200px;
    text-align: center;
}

/* Product Head in Table */
.kv-product-head {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.kv-product-thumb {
    width: 90px;
    height: 90px;
    border-radius: 6px;
    overflow: hidden;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.kv-product-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.kv-product-title {
    font-size: 0.9375rem;
    font-weight: 700;
    line-height: 1.35;
    margin: 0;
    text-align: center;
}

.kv-product-title a {
    color: var(--kv-text);
    text-decoration: none;
    transition: color 0.15s;
}

.kv-product-title a:hover {
    color: #2563eb;
}

.kv-product-price-badge {
    font-size: 1.125rem;
    font-weight: 800;
    color: #111827;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

/* Rows & Values */
.kv-row-label {
    font-weight: 600;
    color: #4b5563;
    background: var(--kv-bg-light);
}

.kv-val {
    text-align: center;
    color: #374151;
}

.kv-comparison-table tbody tr:hover td {
    background-color: #f8fafc;
}

.kv-highlight-cell {
    background-color: #f0fdf4 !important;
}

/* Show Differences Filter State */
.kv-show-diff-only tr[data-has-diff="false"] {
    display: none !important;
}

/* Sticky First Column for Mobile & Horizontal Scroll */
.kv-sticky-col {
    position: sticky;
    left: 0;
    z-index: 3;
    background-color: #ffffff;
    box-shadow: 2px 0 4px -2px rgba(0, 0, 0, 0.1);
}

.kv-comparison-table thead th.kv-sticky-col {
    z-index: 4;
}

/* Badges */
.kv-badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-radius: 4px;
    margin-top: 0.25rem;
}

.kv-badge-green, .kv-badge-best {
    background: var(--kv-green-bg);
    color: var(--kv-green-text);
    border: 1px solid var(--kv-green-border);
}

.kv-badge-teal {
    background: var(--kv-teal-bg);
    color: var(--kv-teal-text);
    border: 1px solid var(--kv-teal-border);
}

.kv-badge-blue {
    background: var(--kv-blue-bg);
    color: var(--kv-blue-text);
    border: 1px solid var(--kv-blue-border);
}

.kv-badge-category {
    background: #e0e7ff;
    color: #3730a3;
    border: 1px solid #c7d2fe;
}

/* Amazon CTA Button */
.kv-amazon-cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    max-width: 220px;
    padding: 0.625rem 1rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: #0f1111 !important;
    background: linear-gradient(to bottom, #f7dfa5, #f0c14b);
    border: 1px solid #a88734;
    border-radius: 20px;
    text-decoration: none !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: all 0.15s ease-in-out;
}

.kv-amazon-cta-btn:hover {
    background: linear-gradient(to bottom, #f5d78e, #eeb933);
    border-color: #9c7e31;
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.18);
}

.kv-amazon-cta-btn.kv-cta-small {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 14px;
}

/* ==========================================================================
   2. Versus Card (Direct 2-Product Showdown)
   ========================================================================== */
.kv-versus-card-wrap {
    margin: 2.5rem 0;
    padding: 1.5rem;
    background: #ffffff;
    border-radius: var(--kv-radius);
    border: 1px solid var(--kv-border);
    box-shadow: var(--kv-shadow-lg);
    font-family: inherit;
}

.kv-versus-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.kv-versus-tag {
    font-size: 0.6875rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #ea580c;
    background: #fff7ed;
    border: 1px solid #ffedd5;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
}

.kv-versus-main-title {
    margin: 0.5rem 0 0 0;
    font-size: 1.375rem;
    font-weight: 800;
    color: #111827;
}

.kv-vs-txt {
    color: #9ca3af;
    font-style: italic;
    font-weight: 400;
}

.kv-versus-grid {
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    align-items: center;
    gap: 1.25rem;
}

.kv-versus-product {
    background: #f9fafb;
    border: 1px solid var(--kv-border);
    border-radius: 8px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.kv-versus-img {
    width: 120px;
    height: 120px;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kv-versus-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.kv-versus-badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    justify-content: center;
    margin-bottom: 0.5rem;
    min-height: 22px;
}

.kv-versus-item-name {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
}

.kv-versus-item-name a {
    color: inherit;
    text-decoration: none;
}

.kv-versus-price {
    font-size: 1.25rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 0.75rem;
}

.kv-versus-specs-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.25rem 0;
    width: 100%;
    text-align: left;
    font-size: 0.8125rem;
    line-height: 1.6;
    border-top: 1px solid #e5e7eb;
    padding-top: 0.75rem;
}

.kv-versus-specs-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.15rem 0;
}

.kv-versus-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.kv-vs-badge-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #111827;
    color: #ffffff;
    font-size: 0.875rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
    border: 3px solid #ffffff;
}

/* ==========================================================================
   3. Single Product Spec Card
   ========================================================================== */
.kv-product-spec-wrap {
    margin: 2rem 0;
    background: #ffffff;
    border-radius: var(--kv-radius);
    border: 1px solid var(--kv-border);
    box-shadow: var(--kv-shadow);
    overflow: hidden;
}

.kv-spec-card-header {
    display: flex;
    padding: 1.25rem;
    gap: 1.25rem;
    align-items: center;
    border-bottom: 1px solid var(--kv-border);
    background: #fafafa;
}

.kv-spec-img {
    width: 110px;
    height: 110px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kv-spec-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.kv-spec-header-info {
    flex-grow: 1;
}

.kv-spec-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0.25rem 0 0.5rem 0;
}

.kv-spec-title a {
    color: inherit;
    text-decoration: none;
}

.kv-spec-price-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.kv-spec-price {
    font-size: 1.25rem;
    font-weight: 800;
    color: #111827;
}

.kv-spec-asin code {
    background: #e5e7eb;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8125rem;
}

.kv-spec-table-wrap {
    padding: 1.25rem;
}

.kv-spec-table-title {
    font-size: 0.9375rem;
    font-weight: 700;
    margin: 0 0 0.75rem 0;
    color: #374151;
}

.kv-spec-table {
    width: 100%;
    border-collapse: collapse;
}

.kv-spec-table th, .kv-spec-table td {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    border-bottom: 1px solid #f3f4f6;
}

.kv-spec-table th {
    width: 35%;
    font-weight: 600;
    color: #4b5563;
    background: #f9fafb;
    text-align: left;
}

/* Notices */
.kv-notice {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    font-size: 0.875rem;
}

.kv-notice-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* ==========================================================================
   4. Mobile Responsiveness (< 768px)
   ========================================================================== */
@media (max-width: 767px) {
    .kv-versus-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .kv-versus-center {
        margin: -10px 0;
    }

    .kv-spec-card-header {
        flex-direction: column;
        text-align: center;
    }

    .kv-spec-header-info {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .kv-spec-price-row {
        flex-direction: column;
        gap: 0.25rem;
    }

    .kv-comparison-table th,
    .kv-comparison-table td {
        padding: 0.65rem 0.75rem;
        font-size: 0.8125rem;
    }

    .kv-col-spec {
        width: 120px;
        min-width: 110px;
    }

    .kv-col-product {
        min-width: 150px;
    }

    .kv-product-thumb {
        width: 70px;
        height: 70px;
    }
}

/* ==========================================================================
   5. Smart Deal Badges & Quiz Finder Wizard Styles
   ========================================================================== */
.kv-deal-badges-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 6px 0;
}

.kv-deal-badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 0.725rem;
    font-weight: 700;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.kv-badge-hot-deal {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.kv-badge-lowest-price {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.kv-badge-prime {
    background: #e0f2fe;
    color: #075985;
    border: 1px solid #bae6fd;
}

/* Quiz Wizard UI */
.kv-quiz-wizard {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
}

.kv-quiz-header h3 {
    margin: 0 0 6px 0;
    color: #0f172a;
    font-size: 1.35rem;
}

.kv-quiz-progress-bar {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin: 15px 0 20px 0;
}

.kv-quiz-progress-fill {
    height: 100%;
    background: #ff9900;
    transition: width 0.3s ease;
}

.kv-quiz-step {
    display: none;
}

.kv-quiz-step.active {
    display: block;
}

.kv-quiz-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin: 18px 0;
}

.kv-quiz-opt input {
    display: none;
}

.kv-opt-card {
    display: block;
    padding: 14px;
    border: 2px solid #cbd5e1;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: #f8fafc;
}

.kv-quiz-opt input:checked + .kv-opt-card {
    border-color: #ff9900;
    background: #fff8e6;
    box-shadow: 0 0 0 3px rgba(255,153,0,0.2);
}

.kv-opt-card strong {
    display: block;
    color: #0f172a;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.kv-opt-card small {
    display: block;
    color: #64748b;
    font-size: 0.8rem;
}

.kv-quiz-step button {
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 700;
    cursor: pointer;
    border: none;
}

.kv-btn-next, .kv-btn-submit {
    background: #ff9900;
    color: #111;
}

.kv-btn-prev {
    background: #e2e8f0;
    color: #334155;
    margin-right: 10px;
}