/**
 * SANKO Premium Product Template Styles
 * Chuyển đổi từ React/Tailwind thành CSS thuần
 * Tuân theo design system SANKO: tông xám đen, xanh dương, system fonts
 */

/* CSS Variables - SANKO Color Palette - Updated theo README.MD */
:root {
    /* Màu nền */
    --sanko-bg-primary: #18181b;      /* Màu nền chính - tông đen xám đậm */
    --sanko-bg-secondary: #27272a;    /* Màu nền phụ - tông đen xám nhạt hơn */
    --sanko-card-bg: #27272a;         /* Màu nền thẻ */
    
    /* Màu chữ */
    --sanko-text-primary: #ffffff;    /* Màu chữ chính - trắng */
    --sanko-text-secondary: #a1a1aa;  /* Màu chữ phụ - xám nhạt */
    
    /* Màu nhấn */
    --sanko-accent: #3b82f6;          /* Màu nhấn - xanh dương */
    --sanko-accent-dark: #2563eb;     /* Màu nhấn đậm - xanh dương đậm */
    
    /* Màu viền */
    --sanko-border-dark: #3f3f46;     /* Màu viền đậm */
    --sanko-border-light: #52525b;    /* Màu viền nhạt */
    
    /* Compatibility với variables cũ */
    --sanko-black: var(--sanko-bg-primary);
    --sanko-dark-gray: var(--sanko-bg-secondary);
    --sanko-gray: #222222;
    --sanko-white: var(--sanko-text-primary);
    --sanko-light-gray: #f5f5f5;
    --sanko-border-gray: var(--sanko-border-light);
    --sanko-text-gray: var(--sanko-text-secondary);
    --sanko-amber: var(--sanko-accent);         /* Chuyển từ amber sang blue */
    --sanko-amber-hover: var(--sanko-accent-dark);
    --sanko-blue: var(--sanko-accent);
    --sanko-blue-hover: var(--sanko-accent-dark);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

.sanko-premium-product {
    font-family: var(--font-family);
    background-color: var(--sanko-bg-primary);
    color: var(--sanko-text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Main Product Layout */
.premium-product-container {
    width: 100%;
    max-width: 100%;
}

.premium-product-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Gallery Section - Left Side */
.premium-gallery-section {
    width: 100%;
    background-color: var(--sanko-bg-primary);
}

.premium-image-gallery {
    display: flex;
    flex-direction: column;
}

/* Thumbnails */
.gallery-thumbnails {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    overflow-y: visible;
    position: sticky;
    top: 96px; /* Header height */
    z-index: 10;
    background-color: var(--sanko-bg-primary);
}

.thumbnail-item {
    min-width: 64px;
    height: 64px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--sanko-border-dark);
    opacity: 0.7;
    border-radius: var(--radius-sm);
}

.thumbnail-item:hover,
.thumbnail-item.active {
    border: 2px solid var(--sanko-accent);
    opacity: 1;
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Main Images */
.gallery-main-images {
    flex: 1;
}

.main-image-item {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
}

/* Mobile Layout Adjustments */
@media (max-width: 767px) {
    .premium-product-layout {
        flex-direction: column;
    }
    
    .premium-gallery-section {
        width: 100%;
        height: auto;
        background-color: var(--sanko-bg-primary);
    }
    
    .premium-image-gallery {
        display: flex;
        flex-direction: column;
        height: auto;
    }
    
    /* Main images container - slide ngang */
    .gallery-main-images {
        order: 1;
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        height: 50vh; /* Giới hạn chiều cao */
        margin-bottom: var(--spacing-md);
        position: relative;
    }
    
    /* Hide scrollbar nhưng vẫn cho phép scroll */
    .gallery-main-images::-webkit-scrollbar {
        display: none;
    }
    
    .gallery-main-images {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }
    
    /* Scroll indicator */
    .gallery-main-images::after {
        content: "← Vuốt để xem thêm ảnh →";
        position: absolute;
        bottom: 10px;
        left: 50%;
        transform: translateX(-50%);
        background-color: rgba(0, 0, 0, 0.7);
        color: white;
        padding: 4px 12px;
        border-radius: 12px;
        font-size: 12px;
        pointer-events: none;
        opacity: 0.8;
        animation: fadeInOut 3s ease-in-out;
    }
    
    @keyframes fadeInOut {
        0%, 100% { opacity: 0; }
        50% { opacity: 0.8; }
    }
    
    .main-image-item {
        min-width: 100vw;
        height: 50vh;
        flex-shrink: 0;
        scroll-snap-align: start;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: var(--spacing-sm);
        min-height: auto;
    }
    
    .main-image-item img {
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
        width: auto;
        height: auto;
        cursor: pointer;
        border-radius: var(--radius-sm);
        transition: transform 0.2s ease;
    }
    
    .main-image-item img:hover {
        transform: scale(1.02);
    }
    
    /* Thumbnails ở dưới */
    .gallery-thumbnails {
        order: 2;
        display: flex;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        overflow-x: auto;
        overflow-y: visible;
        position: static;
        background-color: var(--sanko-bg-primary);
        justify-content: flex-start;
    }
    
    .thumbnail-item {
        min-width: 48px;
        width: 48px;
        height: 48px;
        flex-shrink: 0;
    }
    
    /* Info section xuất hiện ngay dưới gallery */
    .premium-info-section {
        width: 100%;
        background-color: #ffffff;
        position: static;
    }
    
    .premium-product-info {
        position: static;
        max-height: none;
        padding: var(--spacing-lg);
        background-color: #ffffff;
        border-left: none;
        border-top: 1px solid #e5e5e5;
    }
}

.main-image-item img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    transition: transform 0.3s ease;
    cursor: pointer;
    border-radius: var(--radius-sm);
}

.main-image-item img:hover {
    transform: scale(1.05);
}

/* Product Info Section - Right Side */
.premium-info-section {
    width: 100%;
    background-color: var(--sanko-bg-secondary);
}

.premium-product-info {
    position: sticky;
    top: 96px; /* Header height */
    padding: var(--spacing-xl);
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    background-color: #ffffff; /* Nền trắng */
    border-left: 1px solid var(--sanko-border-dark);
    color: #000000; /* Chữ đen */
}

/* Product Header */
.product-header {
    margin-bottom: var(--spacing-xl);
}

.product-title {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: #000000; /* Chữ đen cho title */
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.product-subtitle {
    font-size: var(--font-size-sm);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

/* Override màu chữ cho product subtitle trong premium-product-info */


.title-divider {
    height: 1px;
    width: 64px;
    background-color: var(--sanko-accent);
    margin-bottom: var(--spacing-xl);
}

.product-price {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--sanko-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.product-description {
    color: var(--sanko-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

/* Override màu chữ cho price và description trong premium-product-info */
.premium-product-info .product-price {
    color: #2563eb !important; /* Màu xanh cho giá */
}

.premium-product-info .product-description {
    color: #333333 !important;
}

/* Product Features */
.product-features {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--sanko-text-primary);
    margin-bottom: var(--spacing-md);
}

/* Override màu chữ cho section title trong premium-product-info */
.premium-product-info .section-title {
    color: #000000 !important;
}

.features-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
}

.feature-icon {
    color: var(--sanko-accent);
    margin-right: var(--spacing-sm);
    margin-top: 2px;
    font-weight: bold;
    flex-shrink: 0;
}

.feature-text {
    color: var(--sanko-text-secondary);
    line-height: 1.6;
}

/* Override màu chữ cho feature text trong premium-product-info */
.premium-product-info .feature-text {
    color: #333333 !important;
}

/* Product Specifications */
.product-specifications {
    margin-bottom: var(--spacing-2xl);
}

.specifications-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.spec-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--sanko-border-dark);
}

.spec-label {
    color: var(--sanko-text-secondary);
}

.spec-value {
    color: var(--sanko-text-primary);
    text-align: right;
}

/* Override màu chữ cho spec trong premium-product-info */
.premium-product-info .spec-label {
    color: #666666 !important;
}

.premium-product-info .spec-value {
    color: #000000 !important;
}

/* Override border color cho spec-row trong premium-product-info */
.premium-product-info .spec-row {
    border-bottom: 1px solid #e5e5e5 !important;
}

/* Contact Button */
.product-cta {
    margin-top: var(--spacing-2xl);
}

.premium-contact-btn {
    background-color: var(--sanko-accent);
    color: var(--sanko-text-primary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-xl);
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
}

.premium-contact-btn:hover {
    background-color: var(--sanko-accent-dark);
    transform: translateY(-1px);
}

/* CTA Section */
.premium-cta-section {
    background-color: var(--sanko-bg-secondary);
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.cta-container {
    max-width: 1200px;
    margin: 0 auto;
}

.cta-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: var(--sanko-text-primary);
    margin-bottom: var(--spacing-md);
}

.cta-divider {
    height: 1px;
    width: 96px;
    background-color: var(--sanko-accent);
    margin: 0 auto var(--spacing-xl) auto;
}

.cta-description {
    color: var(--sanko-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* CTA Methods */
.cta-methods {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.cta-method {
    background-color: var(--sanko-card-bg);
    padding: var(--spacing-xl);
    border: 1px solid var(--sanko-border-dark);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    text-align: center;
}

.cta-method:hover {
    border-color: var(--sanko-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.1);
}

.method-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    transition: transform 0.3s ease;
}

.cta-method:hover .method-icon {
    transform: scale(1.1);
}

.method-title {
    font-size: var(--font-size-xl);
    color: var(--sanko-text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.method-desc {
    color: var(--sanko-text-secondary);
    margin-bottom: var(--spacing-md);
}

.method-contact {
    color: var(--sanko-accent);
    font-weight: 500;
}

/* CTA Form */
.cta-form {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--sanko-card-bg);
    padding: var(--spacing-2xl);
    border: 1px solid var(--sanko-border-dark);
    border-radius: var(--radius-lg);
}

.form-title {
    font-size: var(--font-size-2xl);
    color: var(--sanko-text-primary);
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    font-weight: 500;
}

.consultation-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.form-row input,
.form-row textarea {
    background-color: var(--sanko-bg-primary);
    border: 1px solid var(--sanko-border-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    color: var(--sanko-text-primary);
    font-family: var(--font-family);
    transition: border-color 0.3s ease;
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--sanko-accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

.form-row input::placeholder,
.form-row textarea::placeholder {
    color: var(--sanko-text-secondary);
}

.form-submit-btn {
    background-color: var(--sanko-accent);
    color: var(--sanko-text-primary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
}

.form-submit-btn:hover {
    background-color: var(--sanko-accent-dark);
    transform: translateY(-1px);
}

/* Responsive Design */
@media (min-width: 768px) {
    .premium-product-layout {
        flex-direction: row;
    }
    
    .premium-gallery-section {
        width: 60%;
    }
    
    .premium-info-section {
        width: 40%;
    }
    
    .premium-image-gallery {
        flex-direction: row;
    }
    
    .gallery-thumbnails {
        flex-direction: column;
        width: 96px;
        height: calc(100vh - 96px);
        overflow-y: auto;
        overflow-x: visible;
        padding: var(--spacing-md);
    }
    
    .gallery-main-images {
        flex: 1;
        margin-left: var(--spacing-md);
    }
    
    .thumbnail-item {
        min-width: 64px;
        width: 64px;
        margin-bottom: var(--spacing-md);
    }
    
    .product-title {
        font-size: var(--font-size-4xl);
    }
    
    .cta-methods {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .form-row:nth-child(2),
    .form-row:nth-child(3) {
        grid-template-columns: 1fr;
    }
    
    .premium-product-info {
        padding: var(--spacing-2xl) var(--spacing-3xl);
    }
}

@media (min-width: 1024px) {
    .cta-title {
        font-size: var(--font-size-4xl);
    }
    
    .premium-cta-section {
        padding: var(--spacing-3xl) var(--spacing-2xl);
    }
    
    .main-image-item {
        padding: var(--spacing-xl) var(--spacing-2xl);
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scale-in {
    transform: scale(0.95);
    animation: scaleIn 0.3s ease forwards;
}

@keyframes scaleIn {
    to {
        transform: scale(1);
    }
}

/* Lightbox Styles */
.sanko-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sanko-lightbox.active {
    display: flex;
    opacity: 1;
    align-items: center;
    justify-content: center;
}

.lightbox-content {
    position: relative;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: -50px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
    backdrop-filter: blur(10px);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: -80px;
}

.lightbox-next {
    right: -80px;
}

.lightbox-counter {
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

/* Mobile lightbox adjustments */
@media (max-width: 767px) {
    .lightbox-close {
        top: 20px;
        right: 20px;
        background: rgba(0, 0, 0, 0.7);
    }
    
    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .lightbox-prev {
        left: 20px;
    }
    
    .lightbox-next {
        right: 20px;
    }
    
    .lightbox-counter {
        bottom: 20px;
        font-size: 12px;
    }
}

/* Zoom functionality */
.lightbox-image.zoomed {
    cursor: grab;
    transform: scale(2);
}

.lightbox-image.zoomed:active {
    cursor: grabbing;
}

/* Utility Classes */
.blur-backdrop {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.text-gradient {
    background: linear-gradient(135deg, var(--sanko-accent), var(--sanko-accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}