/**
 * Search Overlay - Professional UI/UX Design
 * Modern, accessible, responsive search interface
 */

/* ============================================
   Design System Variables
   ============================================ */
:root {
    /* Website Colors */
    --search-primary: #392F85;
    --search-secondary: #0DD3F1;
    --search-light: #F6F7FC;
    --search-dark: #15233C;
    
    /* Derived Colors */
    --search-panel-bg: #FFFFFF;
    --search-overlay-bg: rgba(21, 35, 60, 0.75);
    --search-title-color: #15233C;
    --search-snippet-color: #586270;
    --search-pill-bg: #F6F7FC;
    --search-pill-text: #392F85;
    --search-pill-unselected-bg: #F6F7FC;
    --search-pill-unselected-text: #374151;
    --search-highlight-bg: #FFF1B8;
    --search-border: #E6E9EE;
    --search-divider: #F3F5F8;
    --search-focus-shadow: rgba(57, 47, 133, 0.15);
    --search-hover-bg: rgba(57, 47, 133, 0.06);
    --search-shadow: rgba(12, 20, 32, 0.06);
    
    /* Spacing (8px base unit) */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'IBM Plex Sans', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --input-size: 18px;
    --title-size: 17px;
    --snippet-size: 14px;
    --pill-size: 12px;
    
    /* Transitions */
    --transition: all 180ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

/* ============================================
   Search Icon Button
   ============================================ */
.search-icon-btn {
    border: none;
    background: transparent;
    color: #333;
    text-decoration: none;
    transition: var(--transition);
    margin-right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.search-icon-btn:hover {
    color: var(--search-primary);
    background: rgba(47, 111, 247, 0.08);
}

.search-icon-btn:focus {
    outline: 2px solid var(--search-primary);
    outline-offset: 2px;
}

.search-icon-btn i {
    font-size: 18px;
}

/* ============================================
   Search Overlay Container
   ============================================ */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 80px;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity 200ms cubic-bezier(0.2, 0.9, 0.3, 1), visibility 200ms;
}

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

/* Backdrop */
.search-overlay-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--search-overlay-bg);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

/* ============================================
   Search Panel (Centered Container)
   ============================================ */
.search-overlay-content {
    position: relative;
    background: var(--search-panel-bg);
    width: 100%;
    max-width: 1150px;
    margin: 0 auto;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.02);
    padding: var(--spacing-lg);
    z-index: 1;
    transform: scale(0.98);
    transition: transform 200ms cubic-bezier(0.2, 0.9, 0.3, 1), opacity 200ms;
    opacity: 0;
    max-height: calc(100vh - 160px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.search-overlay-content .search-input-section {
    margin-top: 0;
    padding-top: 0;
}

.search-overlay.active .search-overlay-content {
    transform: scale(1);
    opacity: 1;
}

/* ============================================
   Sticky Header
   ============================================ */
.search-overlay-header {
    position: sticky;
    top: -28px;
    background: var(--search-panel-bg);
    border-bottom: 1px solid var(--search-divider);
    padding: var(--spacing-sm) 0;
    margin: calc(var(--spacing-lg) * -1) calc(var(--spacing-lg) * -1) var(--spacing-md) calc(var(--spacing-lg) * -1);
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    min-height: 44px;
}

.search-overlay-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--search-title-color);
    margin: 0;
    font-family: var(--font-family);
    line-height: 1.2;
}

/* Close Button */
.search-overlay-close {
    background: rgba(0, 0, 0, 0.04);
    border: none;
    font-size: 16px;
    color: #586270;
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    border-radius: 6px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.search-overlay-close:hover {
    background: var(--search-hover-bg);
    color: var(--search-primary);
}

.search-overlay-close:focus {
    outline: 2px solid var(--search-primary);
    outline-offset: 2px;
}

/* ============================================
   Search Input Section
   ============================================ */
.search-input-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    margin-top: 0;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}

.search-input-icon {
    position: absolute;
    left: var(--spacing-md);
    color: #9CA3AF;
    font-size: 18px;
    pointer-events: none;
    z-index: 1;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl) var(--spacing-md) 48px;
    font-size: var(--input-size);
    font-weight: 400;
    font-family: var(--font-family);
    line-height: 1.3;
    border: 1px solid var(--search-border);
    border-radius: 10px;
    transition: var(--transition);
    background: var(--search-panel-bg);
    color: var(--search-title-color);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

.search-input::placeholder {
    color: #9CA3AF;
    font-weight: 500;
}

.search-input:focus {
    outline: none;
    border-color: var(--search-primary);
    box-shadow: 0 6px 20px var(--search-focus-shadow), inset 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* Loading Spinner */
.search-loading {
    position: absolute;
    right: var(--spacing-md);
    color: var(--search-primary);
    display: none;
    font-size: 18px;
    z-index: 2;
}

.search-loading.active {
    display: block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   Category Selector (Dropdown)
   ============================================ */
.search-category-dropdown-wrapper {
    position: relative;
    flex-shrink: 0;
    min-width: 180px;
}

.search-category-select {
    width: 100%;
    padding: var(--spacing-md) 40px var(--spacing-md) var(--spacing-md);
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-family);
    color: var(--search-title-color);
    background: var(--search-panel-bg);
    border: 1px solid var(--search-border);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: none;
}

.search-category-select:hover {
    border-color: var(--search-primary);
}

.search-category-select:focus {
    outline: none;
    border-color: var(--search-primary);
    box-shadow: 0 6px 20px var(--search-focus-shadow);
}

.search-category-dropdown-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--search-primary);
    pointer-events: none;
    font-size: 14px;
    transition: var(--transition);
}

.search-category-select:focus + .search-category-dropdown-icon {
    color: var(--search-primary);
}

/* ============================================
   Search Results
   ============================================ */
.search-results {
    flex: 1;
    overflow-y: auto;
    margin-top: var(--spacing-md);
    min-height: 0;
}

.search-results-count {
    font-size: var(--snippet-size);
    font-weight: 500;
    color: var(--search-snippet-color);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--search-divider);
    font-family: var(--font-family);
}

.search-results-empty {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--search-snippet-color);
}

.search-results-empty p {
    font-size: var(--snippet-size);
    margin: 0 0 var(--spacing-md) 0;
    font-family: var(--font-family);
}


/* Result List */
.search-results-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Result Item */
.search-result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    background: transparent;
    margin-bottom: 2px;
    min-height: 64px;
}

.search-result-item:hover {
    background: var(--search-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--search-shadow);
    border-color: rgba(47, 111, 247, 0.1);
}

.search-result-item.selected {
    background: var(--search-hover-bg);
    border-color: var(--search-primary);
    box-shadow: 0 4px 12px rgba(47, 111, 247, 0.15);
}

.search-result-item:focus {
    outline: 2px solid var(--search-primary);
    outline-offset: -2px;
}

.search-result-item:active {
    transform: translateY(0);
    transition: transform 100ms;
}

/* Result Content */
.search-result-content {
    flex: 1;
    min-width: 0;
    padding-right: var(--spacing-md);
}

.search-result-title {
    font-size: var(--title-size);
    font-weight: 600;
    font-family: var(--font-family);
    color: var(--search-title-color);
    margin-bottom: 4px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-title mark {
    background: var(--search-highlight-bg);
    color: inherit;
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
    box-shadow: none;
}

.search-result-snippet {
    font-size: var(--snippet-size);
    font-weight: 400;
    font-family: var(--font-family);
    color: var(--search-snippet-color);
    line-height: 1.4;
    margin-top: 2px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-snippet mark {
    background: var(--search-highlight-bg);
    color: inherit;
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
    box-shadow: none;
}

/* Result Meta */
.search-result-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.search-result-category {
    font-size: var(--pill-size);
    font-weight: 500;
    font-family: var(--font-family);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--search-primary);
    background: var(--search-light);
    padding: 4px var(--spacing-sm);
    border-radius: 6px;
    white-space: nowrap;
}

.search-result-meta .fa-arrow-right {
    color: #9CA3AF;
    font-size: 14px;
    transition: var(--transition);
    opacity: 0.6;
}

.search-result-item:hover .fa-arrow-right {
    transform: translateX(4px);
    color: var(--search-primary);
    opacity: 1;
}

/* ============================================
   Custom Scrollbar
   ============================================ */
.search-results::-webkit-scrollbar {
    width: 8px;
}

.search-results::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 6px;
}

.search-results::-webkit-scrollbar-thumb {
    background: rgba(12, 20, 32, 0.12);
    border-radius: 6px;
}

.search-results::-webkit-scrollbar-thumb:hover {
    background: rgba(12, 20, 32, 0.2);
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */
@media (max-width: 768px) {
    .search-overlay {
        padding-top: 0;
        padding-left: 0;
        padding-right: 0;
        align-items: flex-start;
    }
    
    .search-overlay-content {
        max-width: 100%;
        border-radius: 0;
        max-height: 100vh;
        padding: 0;
        border: none;
    }
    
    .search-overlay-header {
        margin: 0;
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: 0;
        min-height: 44px;
    }
    
    .search-overlay-title {
        font-size: 16px;
    }
    
    .search-overlay-close {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
    
    .search-input-section {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-md);
        margin-top: var(--spacing-md);
    }
    
    .search-category-dropdown-wrapper {
        width: 100%;
        min-width: 0;
    }
    
    .search-category-select {
        font-size: 14px;
        padding: var(--spacing-sm) 36px var(--spacing-sm) var(--spacing-sm);
    }
    
    .search-category-dropdown-icon {
        right: var(--spacing-sm);
        font-size: 12px;
    }
    
    .search-input {
        font-size: 16px;
        padding: var(--spacing-md) var(--spacing-xl) var(--spacing-md) 44px;
    }
    
    .search-input-icon {
        left: var(--spacing-md);
        font-size: 16px;
    }
    
    .search-result-item {
        padding: var(--spacing-md);
        min-height: 72px;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .search-result-content {
        padding-right: 0;
        width: 100%;
    }
    
    .search-result-meta {
        width: 100%;
        justify-content: space-between;
    }
    
    .search-overlay-close {
        top: var(--spacing-md);
        right: var(--spacing-md);
        width: 40px;
        height: 40px;
    }
    
    .search-results {
        max-height: calc(100vh - 280px);
    }
}

/* ============================================
   Accessibility
   ============================================ */
.search-overlay[aria-hidden="true"] {
    display: none;
}

.search-overlay[aria-hidden="false"] {
    display: flex;
}

.search-result-item:focus-visible {
    outline: 2px solid var(--search-primary);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}