/* ==========================================================================
   RESULTS & SONG CARD STYLES

   Contains:
   - Results Section Layout & Controls
   - Results Grid System
   - Song Card Components & Interactions
   - Card Accordion & Expansion
   - Tags & Genres Display
   - Manual Selection & Play Buttons
   - Loading States & Animations
   - Welcome Message Display
   ========================================================================== */

/* Main Content */
.main-content {
    flex: 1;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: var(--space-xl);
    width: 100%;
}

/* Query Section */
.query-section {
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: #fff;
}

.query-card {
    border: 2px solid var(--color-primary);
    box-shadow: 0 4px 20px var(--color-primary-alpha-20);
    padding-bottom: var(--space-md) !important;
}

/* Results Section */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.results-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.results-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.results-info-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    border-top: 1px solid var(--border-light);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    gap: var(--space-md);
}

.results-left {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.results-filters {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.results-info {
    display: flex;
    gap: var(--space-md);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    flex-wrap: wrap;
    align-items: center;
}

/* Results Spotify Attribution */
.results-spotify-attribution {
    display: flex;
    align-items: center;
    margin-left: auto;
    opacity: 0.8;
}

.results-spotify-logo-link {
    display: inline-block;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.results-spotify-logo-link:hover {
    opacity: 1;
}

.results-spotify-logo {
    height: 20px;
    width: auto;
    transition: opacity var(--transition-fast);
}

.results-container {
    position: relative;
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 0.25rem var(--space-xl);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-white-alpha-05);
}

.welcome-content h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-md);
    color: #fff;
}

.welcome-content h4 {
    text-align: left;
    font-size: 1.4rem;
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
    color: #fff;
    font-weight: 600;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.welcome-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    font-size: 1.2rem;
}

.welcome-content ul {
    text-align: left;
    max-width: 650px;
    margin: 0 auto var(--space-lg);
    color: var(--color-text-muted);
}

.welcome-content ul li {
    margin-bottom: var(--space-sm);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

/* Song Card */
.song-card {
    background: var(--color-white-alpha-12);
    border: 1px solid var(--border-lighter);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    padding-bottom: 0.6rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.song-card:hover {
    background: var(--color-white-alpha-18);
    border-color: var(--color-primary-alpha-80);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.song-card.playing {
    border-color: var(--color-primary);
    background: var(--color-primary-alpha-10);
}

/* Song Selection Styles */
.song-card.selectable {
    position: relative;
}

.song-card.selectable.selected {
    border-color: var(--color-primary);
    border-width: 2px;
    box-shadow: 0 0 0 1px var(--color-primary-alpha-20);
}

.song-card-checkbox {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
    z-index: 10;
    display: none; /* Hidden by default */
}

/* Show checkboxes only in manual selection mode */
.results-container.manual-selection-mode .song-card-checkbox {
    display: block;
}

/* Adjust card header spacing in manual selection mode */
.results-container.manual-selection-mode .card-header {
    margin-left: var(--space-lg); /* Balanced spacing: 1rem (left edge to checkbox) + 0.5rem gap = 1.5rem total */
}

.card-header {
    display: flex;
    gap: var(--space-md);
    margin-bottom: 0;
}

.song-play-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    background: var(--color-white-alpha-10);
    color: var(--color-primary);
    display: none; /* Hidden by default, shown via manual selection mode */
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

/* Show play button only in manual selection mode */
.results-container.manual-selection-mode .song-play-btn {
    display: flex;
}

.song-play-btn svg {
    width: 12px;
    height: 12px;
    margin-left: 1px; /* Slight offset to visually center the triangle */
}

.song-play-btn:hover {
    background: var(--color-primary-alpha-80);
    color: white;
    transform: scale(1.1);
}

.song-play-btn:active {
    transform: scale(0.95);
}

.card-cover {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
}

.card-info {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.4rem;
    line-height: 1.3;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    text-overflow: ellipsis;
}

.card-artist {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
    font-size: 0.95rem;
    line-height: 1.3;
}

.card-album {
    color: var(--color-text-tertiary);
    font-size: 0.85rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-footer {
    display: flex;
    align-items: center;
    padding-top: var(--space-sm);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-light);
    gap: 0.1rem;
}

.card-footer .card-rank {
    flex: 0 0 auto;
}

.card-footer .scoring-components {
    flex: 1 1 auto;
    justify-content: center;
    gap: 0rem;
}

.card-footer .similarity-score {
    flex: 0 0 auto;
    margin-left: auto;
}

.card-rank {
    color: var(--color-text-primary);
    font-weight: 500;
    font-size: 1.05rem;
    margin-right: var(--space-sm);
}

.similarity-score {
    color: var(--color-warning);
    padding: var(--space-xs) var(--space-sm);
    font-weight: 500;
    font-size: 1.05rem;
}

/* Scoring components in the middle of footer */
.scoring-components {
    display: flex;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.scoring-component {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.card-tags {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
    gap: var(--space-sm);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    flex: 1;
    min-width: 0;
}

/* Accordion Styles */
.card-accordion {
    margin-top: auto;
    border-top: 1px solid var(--border-light);
}

.accordion-toggle {
    width: 100%;
    background: none;
    border: none;
    color: var(--color-text-primary);
    padding: 0.75rem 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-normal);
}

.accordion-toggle:hover {
    color: var(--color-primary);
}

.accordion-toggle.expanded {
    color: var(--color-primary);
}

.accordion-title {
    flex: 1;
    text-align: left;
}

.accordion-icon {
    font-size: 0.8rem;
    transition: transform var(--transition-normal);
    margin-left: var(--space-sm);
}

.accordion-toggle.expanded .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.accordion-content-inner {
    padding: 0 0 var(--space-md) 0;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

.tags-genres-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag-item {
    background: var(--color-primary-alpha-20);
    color: var(--color-primary-bright);
    padding: 0.3rem 0.6rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
}

.genre-item {
    background: rgba(255, 193, 7, 0.2);
    color: var(--color-warning);
    padding: 0.3rem 0.6rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Loading */
.loading {
    text-align: center;
    padding: 4rem var(--space-xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-primary-alpha-30);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes spotify-pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Artist Filter Dropdown */
.dropdown-filter {
    position: relative;
    display: inline-block;
}

.dropdown-filter-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-white-alpha-10);
    border: 1px solid var(--border-lighter);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-normal);
    min-width: 140px;
    justify-content: space-between;
}

.dropdown-filter-btn:hover:not(:disabled) {
    background: var(--color-white-alpha-18);
    border-color: var(--color-primary-alpha-80);
}

.dropdown-filter-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.dropdown-filter-text {
    flex: 1;
    text-align: left;
}

.dropdown-filter-arrow {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.dropdown-filter-content {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #1a1a1a; /* Solid opaque dark background */
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-lighter);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8), 0 4px 16px rgba(0, 0, 0, 0.6);
    margin-top: var(--space-xs);
    max-width: 300px;
    min-width: 270px;
}

.dropdown-filter-list {
    max-height: 300px;
    overflow-y: auto;
    padding: var(--space-sm) 0;
}

.dropdown-filter-item {
    padding: 0;
}

.dropdown-checkbox-label {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    gap: var(--space-sm);
    font-size: 0.9rem;
}

.dropdown-checkbox-label:hover {
    background: var(--color-white-alpha-10);
}

.dropdown-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.dropdown-artist-name {
    flex: 1;
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.dropdown-track-count {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    flex-shrink: 0;
}

/* Master "Select All" checkbox styling */
.master-select-checkbox {
    /* Slightly larger than regular checkboxes */
    width: 18px !important;
    height: 18px !important;
}

.dropdown-filter-item:has(.master-select-checkbox) {
    /* Subtle background and border for master checkbox */
    background: var(--color-white-alpha-5);
    border-bottom: 1px solid var(--color-white-alpha-10);
    margin-bottom: var(--space-xs);
}

.dropdown-filter-item:has(.master-select-checkbox) .dropdown-checkbox-label {
    /* Slightly more padding for master checkbox */
    padding: 0.8rem var(--space-md);
    font-weight: 500;
}

.dropdown-filter-item:has(.master-select-checkbox) .dropdown-checkbox-label:hover {
    background: var(--color-white-alpha-15);
}

.dropdown-filter-actions {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
}

.dropdown-apply-btn {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.dropdown-apply-btn:hover:not(:disabled) {
    background: var(--color-primary-bright);
    transform: translateY(-1px);
}

.dropdown-apply-btn:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

.dropdown-filter-empty {
    padding: var(--space-md);
    text-align: center;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Custom scrollbar for dropdown list */
.dropdown-filter-list::-webkit-scrollbar {
    width: 6px;
}

.dropdown-filter-list::-webkit-scrollbar-track {
    background: var(--color-dark-bg);
    border-radius: var(--radius-sm);
}

.dropdown-filter-list::-webkit-scrollbar-thumb {
    background: var(--color-text-muted);
    border-radius: var(--radius-sm);
}

.dropdown-filter-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}