/* ==========================================================================
   VTR Website - Components CSS
   Buttons, Cards, Forms, and Reusable Components
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--border-radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(47, 85, 151, 0.25);
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
}

/* Secondary Button */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Accent Button */
.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: var(--color-white);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: var(--color-gray-100);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
}

.card-link:hover {
    color: var(--color-primary-dark);
}

.card-link::after {
    content: '\2192';
    transition: transform var(--transition-fast);
}

.card-link:hover::after {
    transform: translateX(4px);
}

/* Brand Card */
.brand-card {
    text-align: center;
    padding: var(--spacing-xl);
}

.brand-card .card-image {
    height: 80px;
    width: auto;
    max-width: 180px;
    margin: 0 auto var(--spacing-lg);
    object-fit: contain;
    background-color: transparent;
}

.brand-card .card-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

/* Product Card */
.product-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card .card-text {
    flex: 1;
}

/* --------------------------------------------------------------------------
   Cards Grid
   -------------------------------------------------------------------------- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.cards-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.cards-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-error);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-gray-800);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 85, 151, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-400);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    padding-right: var(--spacing-xl);
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--spacing-xs);
}

.form-input.error,
.form-textarea.error,
.form-select.error {
    border-color: var(--color-error);
}

/* Checkbox and Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-check input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.hero .btn-primary:hover {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-100);
}

.hero .btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.hero .btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Feature List
   -------------------------------------------------------------------------- */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-xl);
}

.feature-content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.feature-content p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
    color: var(--color-gray-600);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--color-gray-400);
}

.breadcrumb-current {
    color: var(--color-gray-800);
    font-weight: var(--font-weight-medium);
}

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

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 800px;
}

/* --------------------------------------------------------------------------
   Alert / Notice
   -------------------------------------------------------------------------- */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert-info {
    background-color: #e3f2fd;
    color: #1565c0;
    border: 1px solid #90caf9;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.alert-warning {
    background-color: #fff3e0;
    color: #e65100;
    border: 1px solid #ffcc80;
}

.alert-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

/* --------------------------------------------------------------------------
   Table
   -------------------------------------------------------------------------- */
.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.table th {
    background-color: var(--color-gray-100);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-700);
}

.table tbody tr:hover {
    background-color: var(--color-gray-50);
}

/* --------------------------------------------------------------------------
   Contact Info
   -------------------------------------------------------------------------- */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.contact-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gray-100);
    color: var(--color-primary);
    border-radius: var(--border-radius-md);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.contact-value {
    font-size: var(--font-size-base);
    color: var(--color-gray-800);
}

.contact-value a {
    color: var(--color-gray-800);
}

.contact-value a:hover {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Product Detail
   -------------------------------------------------------------------------- */
.product-hero {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.product-hero-image {
    flex-shrink: 0;
    width: 200px;
    height: 100px;
    object-fit: contain;
}

.product-hero-content {
    flex: 1;
}

.product-hero-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
}

.product-hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
}

.product-features {
    margin: var(--spacing-xl) 0;
}

.product-features h3 {
    margin-bottom: var(--spacing-lg);
}

.product-features ul {
    list-style: disc;
    padding-left: var(--spacing-xl);
}

.product-features li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-700);
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.cta-section h3 {
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.cta-section .btn {
    background-color: var(--color-white);
    color: var(--color-accent);
    border-color: var(--color-white);
}

.cta-section .btn:hover {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-100);
}

/* --------------------------------------------------------------------------
   Product Images
   -------------------------------------------------------------------------- */
.product-banner {
    width: 100%;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.product-banner img {
    width: 100%;
    height: auto;
    display: block;
}

.product-image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.product-image-grid.three-col {
    grid-template-columns: repeat(3, 1fr);
}

.product-image-item {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

.product-image-item:hover {
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.product-image-item img {
    width: 100%;
    height: auto;
    display: block;
}

.product-screenshot {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin: var(--spacing-md) 0;
    border: 1px solid var(--color-gray-200);
    max-width: 600px;
}

.product-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

.product-screenshot-caption {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-gray-100);
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    text-align: center;
}

/* Screenshot size variants */
.product-screenshot-sm {
    max-width: 320px;
}

.product-screenshot-md {
    max-width: 480px;
}

.product-screenshot-lg {
    max-width: 640px;
}

.product-screenshot-full {
    max-width: 100%;
}

/* Centered screenshot */
.product-screenshot-center {
    margin-left: auto;
    margin-right: auto;
}

/* Floating screenshot (for inline with text) */
.product-screenshot-float-right {
    float: right;
    margin: 0 0 var(--spacing-md) var(--spacing-lg);
    max-width: 320px;
}

.product-screenshot-float-left {
    float: left;
    margin: 0 var(--spacing-lg) var(--spacing-md) 0;
    max-width: 320px;
}

/* Screenshot grid for multiple images */
.product-screenshots-row {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin: var(--spacing-md) 0;
}

.product-screenshots-row .product-screenshot {
    flex: 1 1 300px;
    max-width: 420px;
    margin: 0;
}

/* 3-column screenshot row */
.product-screenshots-row.three-col .product-screenshot {
    flex: 0 0 calc(33.333% - var(--spacing-md));
    max-width: 400px;
}

/* Inline thumbnail */
.product-thumbnail {
    display: inline-block;
    max-width: 200px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    margin: var(--spacing-xs);
}

.product-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.feature-image {
    float: right;
    width: 45%;
    margin: 0 0 var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Product Banner (full-width workflow/diagram) */
.product-banner {
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    background: var(--color-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
}

.product-banner img {
    width: 100%;
    height: auto;
    display: block;
}

.product-hero-with-image {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.product-hero-with-image .product-hero-content {
    flex: 0 0 auto;
    width: 45%;
    min-width: 320px;
}

.product-hero-with-image .product-hero-image {
    flex: 0 0 auto;
    width: 50%;
    max-width: 550px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.product-hero-with-image .product-hero-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius-lg);
}

/* Image lightbox placeholder */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-overlay img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--border-radius-md);
}

@media (max-width: 767px) {
    .product-image-grid {
        grid-template-columns: 1fr;
    }

    .product-image-grid.three-col {
        grid-template-columns: 1fr;
    }

    .feature-image {
        float: none;
        width: 100%;
        margin: var(--spacing-lg) 0;
    }

    .product-hero-with-image {
        flex-direction: column;
    }

    .product-hero-with-image .product-hero-image {
        max-width: 100%;
        order: -1;
    }
}

/* --------------------------------------------------------------------------
   News Section
   -------------------------------------------------------------------------- */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.news-item {
    padding: var(--spacing-lg);
    background-color: var(--color-gray-50);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.news-item:hover {
    background-color: var(--color-gray-100);
}

.news-date {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xs);
}

.news-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

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

.news-title a:hover {
    color: var(--color-primary);
}

.news-summary {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin: 0;
    line-height: var(--line-height-relaxed);
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-top: var(--spacing-sm);
}

.news-link:hover {
    color: var(--color-primary-dark);
}

.news-link::after {
    content: '\2192';
    transition: transform var(--transition-fast);
}

.news-link:hover::after {
    transform: translateX(4px);
}