/**
 * DT Experts Slider - Styles
 * @version 1.0.2
 * Mobile-First Design - Optimized for 80% mobile traffic
 */

/* ===== CSS Variables ===== */
:root {
    --dtes-primary-color: #14A5F5;
    --dtes-primary-hover: #1399e6;
    --dtes-secondary-color: #2d3748;
    --dtes-text-primary: #2d3748;
    --dtes-text-secondary: #4a5568;
    --dtes-text-muted: #718096;
    --dtes-text-light: #a0aec0;
    --dtes-bg-white: #ffffff;
    --dtes-bg-light: #f7fafc;
    --dtes-bg-gray: #edf2f7;
    --dtes-border-color: #e2e8f0;
    --dtes-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --dtes-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --dtes-shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --dtes-shadow-hover: 0 15px 30px rgba(20, 165, 245, 0.2);
    --dtes-font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --dtes-font-size-base: 14px;
    --dtes-font-size-sm: 13px;
    --dtes-font-size-xs: 12px;
    --dtes-font-size-lg: 16px;
    --dtes-font-size-xl: 18px;
    --dtes-font-size-2xl: 20px;
    --dtes-font-size-3xl: 24px;
    --dtes-radius-sm: 4px;
    --dtes-radius-md: 12px;
    --dtes-radius-lg: 16px;
    --dtes-transition-fast: 0.15s ease;
    --dtes-transition-base: 0.3s ease;
}

/* ===== Container ===== */
.dtes-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    font-family: var(--dtes-font-family);
    color: var(--dtes-text-primary);
}

.dtes-container * {
    box-sizing: border-box;
    font-family: var(--dtes-font-family);
}

/* ===== Expert Card ===== */
.dtes-expert-card {
    background: var(--dtes-bg-white);
    border-radius: var(--dtes-radius-lg);
    overflow: hidden;
    box-shadow: var(--dtes-shadow-md);
    transition: all var(--dtes-transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--dtes-border-color);
}

.dtes-expert-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--dtes-shadow-hover);
    border-color: var(--dtes-primary-color);
}

/* ===== Expert Image (700x700 - Square) ===== */
.dtes-expert-image {
    width: 100%;
    aspect-ratio: 1 / 1; /* SQUARE for 700x700 */
    overflow: hidden;
    background: var(--dtes-bg-gray);
    position: relative;
}

.dtes-expert-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform var(--dtes-transition-base);
}

.dtes-expert-card:hover .dtes-expert-photo {
    transform: scale(1.05);
}

/* ===== Expert Content ===== */
.dtes-expert-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

/* ===== Expert Name ===== */
.dtes-expert-name {
    font-size: var(--dtes-font-size-xl);
    font-weight: 700;
    color: var(--dtes-text-primary);
    margin: 0;
    line-height: 1.3;
}

/* ===== Specialization ===== */
.dtes-expert-specialization {
    display: block;
    color: var(--dtes-primary-color);
    font-size: var(--dtes-font-size-sm);
    font-weight: 600;
    line-height: 1.4;
    margin-top: -8px;
}

/* ===== Bio ===== */
.dtes-expert-bio {
    font-size: var(--dtes-font-size-sm);
    color: var(--dtes-text-secondary);
    line-height: 1.6;
    margin: 5px 0;
}

.dtes-expert-bio p {
    margin: 0 0 10px 0;
}

.dtes-expert-bio p:last-child {
    margin-bottom: 0;
}

/* ===== Achievements ===== */
.dtes-expert-achievements {
    list-style: none;
    margin: 10px 0 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dtes-achievement-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: var(--dtes-font-size-sm);
    color: var(--dtes-text-secondary);
    line-height: 1.5;
}

.dtes-achievement-check {
    color: var(--dtes-primary-color);
    font-weight: bold;
    flex-shrink: 0;
    font-size: var(--dtes-font-size-base);
    margin-top: 2px;
}

/* ===== SLIDER LAYOUT ===== */
.dtes-swiper-wrapper {
    position: relative;
    padding: 0 60px; /* Space for arrows */
}

/* ===== Swiper Navigation (Improved) ===== */
.dtes-swiper-navigation {
    position: absolute;
    top: 40%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    z-index: 10;
}

.dtes-swiper-button-prev,
.dtes-swiper-button-next {
    width: 56px;
    height: 56px;
    background: var(--dtes-bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--dtes-transition-fast);
    pointer-events: auto;
    color: var(--dtes-text-primary);
    border: 2px solid transparent;
}

.dtes-swiper-button-prev:hover,
.dtes-swiper-button-next:hover {
    background: var(--dtes-primary-color);
    color: var(--dtes-bg-white);
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(20, 165, 245, 0.4);
    border-color: var(--dtes-primary-color);
}

.dtes-swiper-button-prev.swiper-button-disabled,
.dtes-swiper-button-next.swiper-button-disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.dtes-swiper-button-prev svg,
.dtes-swiper-button-next svg {
    width: 28px;
    height: 28px;
}

/* ===== Swiper Pagination ===== */
.dtes-swiper-pagination {
    margin-top: 30px;
    position: relative;
    text-align: center;
}

.dtes-swiper-pagination .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: var(--dtes-text-light);
    opacity: 1;
    margin: 0 5px;
    transition: all var(--dtes-transition-fast);
}

.dtes-swiper-pagination .swiper-pagination-bullet-active {
    background: var(--dtes-primary-color);
    width: 30px;
    border-radius: 5px;
}

/* ===== GRID LAYOUT ===== */
.dtes-display-grid .dtes-grid-wrapper {
    width: 100%;
}

.dtes-experts-grid {
    display: grid;
    gap: 30px;
    grid-template-columns: 1fr; /* Default mobile */
}

/* Grid columns based on data attributes */
.dtes-display-grid[data-grid-columns="2"] .dtes-experts-grid {
    grid-template-columns: repeat(2, 1fr);
}

.dtes-display-grid[data-grid-columns="3"] .dtes-experts-grid {
    grid-template-columns: repeat(3, 1fr);
}

.dtes-display-grid[data-grid-columns="4"] .dtes-experts-grid {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== Responsive - Tablet ===== */
@media (min-width: 768px) {
    .dtes-container {
        padding: 0 20px;
    }
    
    .dtes-swiper-wrapper {
        padding: 0 70px;
    }
    
    .dtes-expert-content {
        padding: 28px;
    }
    
    .dtes-expert-name {
        font-size: var(--dtes-font-size-2xl);
    }
    
    .dtes-expert-specialization {
        font-size: var(--dtes-font-size-base);
    }
    
    .dtes-expert-bio {
        font-size: var(--dtes-font-size-base);
    }
    
    .dtes-achievement-item {
        font-size: var(--dtes-font-size-base);
    }
    
    /* Grid tablet */
    .dtes-experts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== Responsive - Desktop ===== */
@media (min-width: 1024px) {
    .dtes-container {
        padding: 0 30px;
    }
    
    .dtes-swiper-wrapper {
        padding: 0 80px;
    }
    
    .dtes-swiper-button-prev,
    .dtes-swiper-button-next {
        width: 64px;
        height: 64px;
    }
    
    .dtes-swiper-button-prev svg,
    .dtes-swiper-button-next svg {
        width: 32px;
        height: 32px;
    }
    
    /* Grid desktop */
    .dtes-experts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== Mobile Optimization (do 767px) ===== */
@media (max-width: 767px) {
    .dtes-container {
        padding: 0 10px;
    }
    
    .dtes-swiper-wrapper {
        padding: 0 45px;
    }
    
    .dtes-expert-content {
        padding: 20px;
    }
    
    .dtes-expert-name {
        font-size: var(--dtes-font-size-lg);
    }
    
    .dtes-expert-specialization {
        font-size: var(--dtes-font-size-xs);
    }
    
    .dtes-expert-bio {
        font-size: var(--dtes-font-size-xs);
    }
    
    .dtes-achievement-item {
        font-size: var(--dtes-font-size-xs);
    }
    
    .dtes-swiper-button-prev,
    .dtes-swiper-button-next {
        width: 44px;
        height: 44px;
    }
    
    .dtes-swiper-button-prev svg,
    .dtes-swiper-button-next svg {
        width: 20px;
        height: 20px;
    }
    
    /* Grid mobile - force 1 column */
    .dtes-experts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* ===== Very Small Mobile ===== */
@media (max-width: 359px) {
    .dtes-expert-name {
        font-size: var(--dtes-font-size-base);
    }
}

/* ===== Accessibility ===== */
.dtes-swiper-button-prev:focus,
.dtes-swiper-button-next:focus {
    outline: 3px solid var(--dtes-primary-color);
    outline-offset: 2px;
}

/* ===== Performance - Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== Print Styles ===== */
@media print {
    .dtes-swiper-navigation,
    .dtes-swiper-pagination {
        display: none;
    }
    
    .dtes-expert-card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* ===== Loading State ===== */
.dtes-experts-swiper:not(.swiper-initialized) .swiper-slide {
    opacity: 0.5;
}

.dtes-experts-swiper.swiper-initialized .swiper-slide {
    opacity: 1;
    transition: opacity 0.3s ease;
}