/* ============================================
   Price Paint Product Portal — Mobile-First CSS
   Brand: Price Paint (pricepaint.co.za)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --pp-primary: #b8860b;
    --pp-primary-dark: #96700a;
    --pp-accent: #d4a942;
    --pp-navy: #0b0c2a;
    --pp-navy-light: #161840;
    --pp-dark: #1a1a2e;
    --pp-text: #333333;
    --pp-text-light: #666666;
    --pp-white: #ffffff;
    --pp-light-bg: #f5f7fb;
    --pp-border: #e2e8f0;
    --pp-success: #22c55e;
    --pp-warning: #f59e0b;
    --pp-shadow: 0 2px 12px rgba(11, 12, 42, 0.08);
    --pp-shadow-hover: 0 8px 24px rgba(11, 12, 42, 0.15);
    --pp-radius: 12px;
    --pp-radius-sm: 8px;
    --pp-transition: 0.25s ease;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Raleway', 'Segoe UI', Roboto, sans-serif;
    color: var(--pp-text);
    background: var(--pp-light-bg);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--pp-primary);
    text-decoration: none;
    transition: color var(--pp-transition);
}

a:hover {
    color: var(--pp-primary-dark);
}

/* --- Header --- */
.site-header {
    background: var(--pp-navy);
    padding: 16px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.header-logo img {
    height: 48px;
    width: auto;
}

.header-tagline {
    color: rgba(255,255,255,0.7);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: nowrap;
}

.header-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--pp-white);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--pp-radius-sm);
    background: rgba(255,255,255,0.1);
    transition: background var(--pp-transition);
}

.header-back:hover {
    background: rgba(255,255,255,0.2);
    color: var(--pp-white);
}

.header-back svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* --- Hero Banner (Index Page) --- */
.hero-banner {
    background: linear-gradient(135deg, var(--pp-navy) 0%, var(--pp-navy-light) 100%);
    padding: 40px 20px 32px;
    text-align: center;
}

.hero-banner h1 {
    color: var(--pp-white);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.hero-banner p {
    color: rgba(255,255,255,0.75);
    font-size: 0.95rem;
    max-width: 500px;
    margin: 0 auto;
}

/* --- Product Grid --- */
.product-grid-section {
    padding: 24px 16px 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.category-filter {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 0 0 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.category-filter::-webkit-scrollbar {
    display: none;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--pp-border);
    border-radius: 50px;
    background: var(--pp-white);
    color: var(--pp-text-light);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--pp-transition);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--pp-primary);
    background: var(--pp-primary);
    color: var(--pp-white);
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 8px;
}

/* --- Product Card --- */
.product-card {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    box-shadow: var(--pp-shadow);
    overflow: hidden;
    transition: transform var(--pp-transition), box-shadow var(--pp-transition);
    display: flex;
    flex-direction: row;
    text-decoration: none;
    color: inherit;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--pp-shadow-hover);
    color: inherit;
}

.card-color-bar {
    width: 6px;
    flex-shrink: 0;
}

.card-color-bar.roof { background: var(--pp-primary); }
.card-color-bar.sealer { background: #22c55e; }
.card-color-bar.primer { background: #f59e0b; }
.card-color-bar.paint { background: #8b5cf6; }
.card-color-bar.specialty { background: #ef4444; }
.card-color-bar.coating { background: #06b6d4; }

.card-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-category {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 3px 10px;
    border-radius: 50px;
    width: fit-content;
}

.card-category.roof { background: rgba(61,104,255,0.1); color: var(--pp-primary); }
.card-category.sealer { background: rgba(34,197,94,0.1); color: #16a34a; }
.card-category.primer { background: rgba(245,158,11,0.1); color: #d97706; }
.card-category.paint { background: rgba(139,92,246,0.1); color: #7c3aed; }
.card-category.specialty { background: rgba(239,68,68,0.1); color: #dc2626; }
.card-category.coating { background: rgba(6,182,212,0.1); color: #0891b2; }

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--pp-navy);
    line-height: 1.3;
}

.card-excerpt {
    font-size: 0.82rem;
    color: var(--pp-text-light);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-arrow {
    margin-left: auto;
    display: flex;
    align-items: center;
    padding: 16px 14px 16px 8px;
    color: var(--pp-primary);
    flex-shrink: 0;
}

.card-arrow svg {
    width: 20px;
    height: 20px;
    transition: transform var(--pp-transition);
}

.product-card:hover .card-arrow svg {
    transform: translateX(3px);
}

/* --- Product Page Hero --- */
.product-hero {
    background: linear-gradient(135deg, var(--pp-navy) 0%, var(--pp-navy-light) 100%);
    padding: 32px 20px;
}

.product-hero-inner {
    max-width: 800px;
    margin: 0 auto;
}

.product-hero .card-category {
    margin-bottom: 8px;
}

.product-hero h1 {
    color: var(--pp-white);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 4px;
}

.product-hero .subtitle {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
}

/* --- Tab Navigation --- */
.tab-nav {
    display: flex;
    overflow-x: auto;
    background: var(--pp-white);
    border-bottom: 2px solid var(--pp-border);
    padding: 0 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    position: sticky;
    top: 68px;
    z-index: 50;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.tab-nav::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    padding: 14px 18px;
    border: none;
    background: none;
    color: var(--pp-text-light);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    transition: color var(--pp-transition);
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--pp-primary);
    border-radius: 3px 3px 0 0;
    transform: scaleX(0);
    transition: transform var(--pp-transition);
}

.tab-btn:hover {
    color: var(--pp-primary);
}

.tab-btn.active {
    color: var(--pp-primary);
}

.tab-btn.active::after {
    transform: scaleX(1);
}

/* --- Tab Content --- */
.tab-content-area {
    padding: 20px 16px 40px;
    max-width: 800px;
    margin: 0 auto;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Description Tab --- */
.description-content {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    padding: 24px 20px;
    box-shadow: var(--pp-shadow);
}

.description-content h2 {
    font-size: 1.15rem;
    color: var(--pp-navy);
    margin-bottom: 12px;
}

.description-content p {
    color: var(--pp-text);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.description-content p:last-child {
    margin-bottom: 0;
}

.key-features {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--pp-border);
}

.key-features h3 {
    font-size: 0.9rem;
    color: var(--pp-navy);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--pp-text);
    line-height: 1.5;
}

.feature-list li::before {
    content: '';
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    background: rgba(61,104,255,0.1);
    border-radius: 50%;
    margin-top: 2px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%233d68ff' stroke-width='3'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M5 13l4 4L19 7'/%3E%3C/svg%3E");
    background-size: 12px;
    background-position: center;
    background-repeat: no-repeat;
}

/* --- TDS Tab --- */
.tds-card {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    padding: 24px 20px;
    box-shadow: var(--pp-shadow);
    text-align: center;
}

.tds-card .tds-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: rgba(61,104,255,0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tds-card .tds-icon svg {
    width: 32px;
    height: 32px;
    color: var(--pp-primary);
}

.tds-card h3 {
    font-size: 1.05rem;
    color: var(--pp-navy);
    margin-bottom: 8px;
}

.tds-card p {
    font-size: 0.85rem;
    color: var(--pp-text-light);
    margin-bottom: 20px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--pp-primary);
    color: var(--pp-white);
    border-radius: var(--pp-radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
    transition: background var(--pp-transition), transform var(--pp-transition);
}

.btn-download:hover {
    background: var(--pp-primary-dark);
    color: var(--pp-white);
    transform: translateY(-1px);
}

.btn-download svg {
    width: 18px;
    height: 18px;
}

.tds-coming-soon {
    padding: 40px 20px;
    text-align: center;
    color: var(--pp-text-light);
}

.tds-coming-soon .icon-clock {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    color: var(--pp-warning);
}

.tds-coming-soon p {
    font-size: 0.9rem;
}

/* --- Warranty Tab --- */
.warranty-card {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    padding: 24px 20px;
    box-shadow: var(--pp-shadow);
}

.warranty-card h3 {
    font-size: 1.05rem;
    color: var(--pp-navy);
    margin-bottom: 12px;
}

.warranty-card p {
    font-size: 0.88rem;
    color: var(--pp-text);
    line-height: 1.7;
    margin-bottom: 16px;
}

.warranty-notice {
    background: rgba(245,158,11,0.08);
    border-left: 4px solid var(--pp-warning);
    padding: 14px 16px;
    border-radius: 0 var(--pp-radius-sm) var(--pp-radius-sm) 0;
    margin-bottom: 20px;
}

.warranty-notice p {
    font-size: 0.85rem;
    font-weight: 600;
    color: #92400e;
    margin-bottom: 0;
}

.btn-warranty {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--pp-navy);
    color: var(--pp-white);
    border-radius: var(--pp-radius-sm);
    font-weight: 700;
    font-size: 0.88rem;
    transition: background var(--pp-transition), transform var(--pp-transition);
}

.btn-warranty:hover {
    background: var(--pp-navy-light);
    color: var(--pp-white);
    transform: translateY(-1px);
}

.btn-warranty svg {
    width: 16px;
    height: 16px;
}

/* --- Specs Tab --- */
.specs-card {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    padding: 24px 20px;
    box-shadow: var(--pp-shadow);
}

.specs-card h3 {
    font-size: 1.05rem;
    color: var(--pp-navy);
    margin-bottom: 16px;
}

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

.specs-table tr {
    border-bottom: 1px solid var(--pp-border);
}

.specs-table tr:last-child {
    border-bottom: none;
}

.specs-table th {
    text-align: left;
    padding: 12px 12px 12px 0;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--pp-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: 40%;
    vertical-align: top;
}

.specs-table td {
    padding: 12px 0;
    font-size: 0.88rem;
    color: var(--pp-text);
}

.size-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.size-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--pp-light-bg);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--pp-navy);
}

/* --- Buy CTA --- */
.buy-cta {
    background: var(--pp-white);
    border-radius: var(--pp-radius);
    padding: 24px 20px;
    box-shadow: var(--pp-shadow);
    text-align: center;
    margin-top: 20px;
}

.buy-cta h3 {
    font-size: 1rem;
    color: var(--pp-navy);
    margin-bottom: 6px;
}

.buy-cta p {
    font-size: 0.82rem;
    color: var(--pp-text-light);
    margin-bottom: 16px;
}

.btn-buy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    max-width: 320px;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--pp-primary) 0%, var(--pp-accent) 100%);
    color: var(--pp-white);
    border-radius: var(--pp-radius-sm);
    font-weight: 700;
    font-size: 1rem;
    transition: transform var(--pp-transition), box-shadow var(--pp-transition);
    box-shadow: 0 4px 15px rgba(61,104,255,0.3);
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(61,104,255,0.4);
    color: var(--pp-white);
}

.btn-buy svg {
    width: 20px;
    height: 20px;
}

.btn-buy-disabled {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    max-width: 320px;
    padding: 16px 24px;
    background: #9ca3af;
    color: var(--pp-white);
    border-radius: var(--pp-radius-sm);
    font-weight: 700;
    font-size: 1rem;
    cursor: default;
}

/* --- Contact Footer --- */
.contact-footer {
    background: var(--pp-navy);
    padding: 32px 20px;
    text-align: center;
    margin-top: 40px;
}

.contact-footer h3 {
    color: var(--pp-white);
    font-size: 1rem;
    margin-bottom: 16px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    padding: 10px 20px;
    background: rgba(255,255,255,0.08);
    border-radius: var(--pp-radius-sm);
    transition: background var(--pp-transition);
}

.contact-link:hover {
    background: rgba(255,255,255,0.15);
    color: var(--pp-white);
}

.contact-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.site-footer {
    background: var(--pp-navy);
    padding: 16px 20px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.site-footer p {
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
}

.site-footer a {
    color: rgba(255,255,255,0.6);
}

.site-footer a:hover {
    color: var(--pp-white);
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--pp-primary);
    color: var(--pp-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(61,104,255,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--pp-transition);
    z-index: 90;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--pp-primary-dark);
    transform: translateY(-2px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* --- Responsive: Tablet+ --- */
@media (min-width: 480px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-card {
        flex-direction: column;
    }

    .card-color-bar {
        width: auto;
        height: 5px;
    }

    .card-arrow {
        padding: 0 20px 16px;
    }

    .contact-links {
        flex-direction: row;
        justify-content: center;
    }
}

@media (min-width: 768px) {
    .hero-banner {
        padding: 56px 20px 44px;
    }

    .hero-banner h1 {
        font-size: 2rem;
    }

    .product-grid-section {
        padding: 32px 24px 80px;
    }

    .product-hero h1 {
        font-size: 1.8rem;
    }

    .tab-btn {
        font-size: 0.85rem;
        padding: 16px 24px;
    }

    .tab-content-area {
        padding: 28px 24px 60px;
    }
}

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

    .header-logo img {
        height: 56px;
    }
}

/* --- Print Styles --- */
@media print {
    .site-header,
    .tab-nav,
    .buy-cta,
    .contact-footer,
    .back-to-top,
    .header-back,
    .btn-buy,
    .btn-warranty {
        display: none !important;
    }

    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .product-hero {
        background: none !important;
        padding: 20px 0;
    }

    .product-hero h1 {
        color: black;
        font-size: 18pt;
    }

    .product-hero .card-category {
        border: 1px solid #ccc;
    }

    .tab-panel {
        display: block !important;
        page-break-inside: avoid;
        margin-bottom: 20px;
    }

    .tab-content-area {
        padding: 0;
    }

    .description-content,
    .tds-card,
    .warranty-card,
    .specs-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}