/**
 * Search Enhancements CSS
 * Eyes of Azrael
 *
 * Polished styles for:
 * - Command palette (Ctrl+K)
 * - Enhanced autocomplete dropdown
 * - Recent searches
 * - Loading states
 * - Keyboard hints
 *
 * @version 2.0.0
 */

/* ============================================================================
   CSS Custom Properties
   ============================================================================ */

:root {
    /* Command palette tokens */
    --cmd-bg: rgba(15, 15, 25, 0.98);
    --cmd-backdrop: rgba(0, 0, 0, 0.75);
    --cmd-border: rgba(147, 112, 219, 0.2);
    --cmd-border-active: rgba(147, 112, 219, 0.5);
    --cmd-text: #f8f9fa;
    --cmd-text-secondary: #adb5bd;
    --cmd-text-muted: #6c757d;
    --cmd-item-hover: rgba(147, 112, 219, 0.15);
    --cmd-item-active: rgba(147, 112, 219, 0.25);
    --cmd-primary: #9370DB;
    --cmd-primary-rgb: 147, 112, 219;
    --cmd-secondary: #B094E6;
    --cmd-radius: 16px;
    --cmd-radius-sm: 8px;
    --cmd-shadow: 0 25px 100px rgba(0, 0, 0, 0.5);
    --cmd-transition: 0.2s cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================================================
   Command Palette
   ============================================================================ */

.command-palette {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--cmd-transition), visibility var(--cmd-transition);
}

.command-palette.open {
    opacity: 1;
    visibility: visible;
}

/* Backdrop */
.command-palette-backdrop {
    position: absolute;
    inset: 0;
    background: var(--cmd-backdrop);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Container */
.command-palette-container {
    position: relative;
    width: 100%;
    max-width: 640px;
    max-height: 70vh;
    margin: 0 1rem;
    display: flex;
    flex-direction: column;
    background: var(--cmd-bg);
    border: 1px solid var(--cmd-border);
    border-radius: var(--cmd-radius);
    box-shadow: var(--cmd-shadow);
    overflow: hidden;
    transform: translateY(-20px) scale(0.95);
    transition: transform var(--cmd-transition);
}

.command-palette.open .command-palette-container {
    transform: translateY(0) scale(1);
}

/* Header */
.command-palette-header {
    flex-shrink: 0;
    padding: 0.75rem;
    border-bottom: 1px solid var(--cmd-border);
}

.command-palette-search-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--cmd-border);
    border-radius: var(--cmd-radius-sm);
    transition: border-color var(--cmd-transition);
}

.command-palette-search-wrapper:focus-within {
    border-color: var(--cmd-border-active);
}

.command-palette-icon {
    flex-shrink: 0;
    color: var(--cmd-text-secondary);
}

.command-palette-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 1.1rem;
    font-family: inherit;
    color: var(--cmd-text);
}

.command-palette-input::placeholder {
    color: var(--cmd-text-muted);
}

.command-palette-kbd {
    flex-shrink: 0;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-family: inherit;
    font-weight: 600;
    color: var(--cmd-text-secondary);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Body */
.command-palette-body {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--cmd-primary) transparent;
}

.command-palette-body::-webkit-scrollbar {
    width: 6px;
}

.command-palette-body::-webkit-scrollbar-thumb {
    background: var(--cmd-primary);
    border-radius: 3px;
}

.command-palette-content {
    padding: 0.5rem;
}

/* Section */
.command-section {
    margin-bottom: 0.5rem;
}

.command-section:last-child {
    margin-bottom: 0;
}

.command-section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem 0.5rem;
}

.command-section-icon {
    font-size: 1rem;
}

.command-section-title {
    flex: 1;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--cmd-text-secondary);
}

.command-section-clear {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--cmd-text-muted);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.command-section-clear:hover {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.command-section-items {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Command Item */
.command-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--cmd-radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

.command-item:hover,
.command-item.active {
    background: var(--cmd-item-hover);
}

.command-item.active {
    background: var(--cmd-item-active);
}

.command-item-primary {
    background: rgba(var(--cmd-primary-rgb), 0.1);
    border: 1px solid rgba(var(--cmd-primary-rgb), 0.2);
}

.command-item-primary:hover,
.command-item-primary.active {
    background: rgba(var(--cmd-primary-rgb), 0.2);
    border-color: rgba(var(--cmd-primary-rgb), 0.4);
}

.command-item-icon {
    flex-shrink: 0;
    font-size: 1.1rem;
    opacity: 0.8;
}

.command-item-text {
    flex: 1;
    font-size: 0.95rem;
    color: var(--cmd-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.command-item-text mark {
    background: rgba(255, 215, 0, 0.3);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

.command-item-meta {
    font-size: 0.8rem;
    color: var(--cmd-text-muted);
}

.command-item kbd {
    padding: 0.2rem 0.4rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--cmd-text-secondary);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Command Chips */
.command-chips {
    flex-direction: row !important;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 0.75rem;
}

.command-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--cmd-text);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.command-chip:hover {
    background: var(--cmd-primary);
    border-color: var(--cmd-primary);
    color: white;
}

/* Loading State */
.command-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem 1rem;
    color: var(--cmd-text-secondary);
}

.command-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(var(--cmd-primary-rgb), 0.2);
    border-top-color: var(--cmd-primary);
    border-radius: 50%;
    animation: cmd-spin 0.8s linear infinite;
}

@keyframes cmd-spin {
    to { transform: rotate(360deg); }
}

/* Footer */
.command-palette-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--cmd-border);
    background: rgba(0, 0, 0, 0.2);
}

.command-hint {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.75rem;
    color: var(--cmd-text-muted);
}

.command-hint kbd {
    padding: 0.15rem 0.375rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--cmd-text-secondary);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

/* ============================================================================
   Enhanced Search Dropdown
   ============================================================================ */

.search-dropdown-enhanced {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 25, 0.98);
    border: 1px solid var(--cmd-border);
    border-radius: var(--cmd-radius);
    box-shadow: var(--cmd-shadow);
    max-height: 400px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--cmd-transition);
}

.search-dropdown-enhanced.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-section {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--cmd-border);
}

.dropdown-section:last-child {
    border-bottom: none;
}

.dropdown-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--cmd-text-secondary);
}

.dropdown-clear-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--cmd-text-muted);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.dropdown-clear-btn:hover {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.dropdown-item:hover,
.dropdown-item.active {
    background: var(--cmd-item-hover);
}

.dropdown-item-icon {
    flex-shrink: 0;
    font-size: 1rem;
    opacity: 0.7;
}

.dropdown-item-text {
    flex: 1;
    font-size: 0.95rem;
    color: var(--cmd-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dropdown-item-text mark {
    background: rgba(255, 215, 0, 0.3);
    color: inherit;
    padding: 0 2px;
    border-radius: 2px;
}

.dropdown-item-count {
    font-size: 0.8rem;
    color: var(--cmd-text-muted);
}

/* Loading */
.dropdown-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--cmd-text-secondary);
}

.dropdown-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(var(--cmd-primary-rgb), 0.2);
    border-top-color: var(--cmd-primary);
    border-radius: 50%;
    animation: cmd-spin 0.8s linear infinite;
}

/* No Results */
.dropdown-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 2rem;
    text-align: center;
    color: var(--cmd-text-secondary);
}

.dropdown-no-results-icon {
    font-size: 2rem;
    opacity: 0.5;
}

.dropdown-no-results-hint {
    font-size: 0.8rem;
    color: var(--cmd-text-muted);
}

/* ============================================================================
   Keyboard Shortcut Hint
   ============================================================================ */

.search-kbd-hint {
    position: absolute;
    right: 100px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.25rem 0.5rem;
    background: rgba(var(--cmd-primary-rgb), 0.1);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    opacity: 0.8;
}

.search-kbd-hint:hover {
    opacity: 1;
    background: rgba(var(--cmd-primary-rgb), 0.2);
}

.search-kbd-hint kbd {
    padding: 0.15rem 0.375rem;
    font-size: 0.7rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--cmd-primary);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(var(--cmd-primary-rgb), 0.3);
    border-radius: 4px;
}

/* Hide on mobile */
@media (max-width: 768px) {
    .search-kbd-hint {
        display: none;
    }
}

/* ============================================================================
   Enhanced Loading States for Search Results
   ============================================================================ */

.search-loading-enhanced {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    padding: 3rem;
    text-align: center;
}

.search-loading-animation {
    position: relative;
    width: 100px;
    height: 100px;
    margin-bottom: 2rem;
}

.search-loading-ring {
    position: absolute;
    inset: 0;
    border: 3px solid transparent;
    border-top-color: var(--cmd-primary);
    border-radius: 50%;
    animation: search-spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.search-loading-ring:nth-child(2) {
    inset: 10px;
    border-top-color: var(--cmd-secondary);
    animation-delay: -0.4s;
}

.search-loading-ring:nth-child(3) {
    inset: 20px;
    border-top-color: #51cf66;
    animation-delay: -0.8s;
}

@keyframes search-spin {
    to { transform: rotate(360deg); }
}

.search-loading-text {
    font-size: 1.1rem;
    color: var(--cmd-text-secondary);
    margin-bottom: 0.5rem;
}

.search-loading-subtext {
    font-size: 0.9rem;
    color: var(--cmd-text-muted);
}

/* Shimmer effect for skeleton cards */
.search-skeleton-shimmer {
    position: relative;
    overflow: hidden;
}

.search-skeleton-shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.08),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ============================================================================
   No Results State Enhancement
   ============================================================================ */

.no-results-enhanced {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(
        135deg,
        rgba(var(--cmd-primary-rgb), 0.05) 0%,
        rgba(var(--cmd-primary-rgb), 0.02) 100%
    );
    border: 2px dashed rgba(var(--cmd-primary-rgb), 0.2);
    border-radius: 20px;
}

.no-results-visual {
    margin-bottom: 1.5rem;
}

.no-results-icon-animated {
    font-size: 4rem;
    opacity: 0.6;
    animation: no-results-bounce 2s ease-in-out infinite;
}

@keyframes no-results-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.no-results-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--cmd-text);
    margin: 0 0 0.5rem;
}

.no-results-query {
    color: var(--cmd-primary);
}

.no-results-hint {
    font-size: 1rem;
    color: var(--cmd-text-secondary);
    margin: 0 0 2rem;
}

.no-results-tips {
    max-width: 400px;
    margin: 0 auto 2rem;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    text-align: left;
}

.no-results-tips-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--cmd-text);
    margin: 0 0 0.75rem;
}

.no-results-tips-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.no-results-tips-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--cmd-text-secondary);
}

.no-results-tips-list li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--cmd-primary);
}

.no-results-suggestions {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(var(--cmd-primary-rgb), 0.2);
}

.suggestions-title {
    font-size: 0.9rem;
    color: var(--cmd-text-secondary);
    margin: 0 0 1rem;
}

.suggestion-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.suggestion-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--cmd-primary);
    background: rgba(var(--cmd-primary-rgb), 0.1);
    border: 1px solid rgba(var(--cmd-primary-rgb), 0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.suggestion-btn:hover {
    background: var(--cmd-primary);
    border-color: var(--cmd-primary);
    color: white;
    transform: translateY(-2px);
}

/* ============================================================================
   Light Mode Support
   ============================================================================ */

@media (prefers-color-scheme: light) {
    :root {
        --cmd-bg: rgba(255, 255, 255, 0.98);
        --cmd-backdrop: rgba(0, 0, 0, 0.5);
        --cmd-border: rgba(147, 112, 219, 0.15);
        --cmd-border-active: rgba(147, 112, 219, 0.4);
        --cmd-text: #1a1a2e;
        --cmd-text-secondary: #666;
        --cmd-text-muted: #999;
        --cmd-item-hover: rgba(147, 112, 219, 0.1);
        --cmd-item-active: rgba(147, 112, 219, 0.15);
    }

    .command-palette-search-wrapper {
        background: rgba(0, 0, 0, 0.02);
    }

    .command-palette-kbd,
    .command-hint kbd,
    .search-kbd-hint kbd {
        background: rgba(0, 0, 0, 0.05);
        border-color: rgba(0, 0, 0, 0.1);
    }

    .command-chip {
        background: rgba(0, 0, 0, 0.03);
        border-color: rgba(0, 0, 0, 0.08);
    }

    .search-dropdown-enhanced {
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    }
}

/* ============================================================================
   Responsive Adjustments
   ============================================================================ */

@media (max-width: 640px) {
    .command-palette {
        padding-top: 5vh;
    }

    .command-palette-container {
        max-height: 80vh;
        margin: 0 0.5rem;
        border-radius: 12px;
    }

    .command-palette-input {
        font-size: 1rem;
    }

    .command-palette-footer {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .command-item {
        padding: 0.625rem 0.75rem;
    }
}

/* ============================================================================
   Reduced Motion
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
    .command-palette,
    .command-palette-container,
    .search-dropdown-enhanced,
    .command-item,
    .dropdown-item {
        transition: none;
    }

    .command-spinner,
    .dropdown-spinner,
    .search-loading-ring,
    .no-results-icon-animated {
        animation: none;
    }

    .search-skeleton-shimmer::after {
        animation: none;
    }
}

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
    .command-palette,
    .search-kbd-hint,
    .search-dropdown-enhanced {
        display: none !important;
    }
}