/**
 * Album Compare Component Styles
 * Side-by-side album comparison using native <dialog>
 * @version 2.0.0
 */

/* ============================================================
   COMPARE CHECKBOX ON ALBUM CARDS
   ============================================================ */

.album-compare-checkbox {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    /* prevent the <a> ancestor from triggering navigation */
    pointer-events: auto;
}

.album-compare-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.album-compare-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: var(--radius-sm, 4px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    transition: all var(--transition-fast, 150ms) ease;
}

.album-compare-indicator::after {
    content: '';
    display: block;
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 2px;
    background: transparent;
    transition: background var(--transition-fast, 150ms) ease;
}

/* Hover */
.album-compare-checkbox:hover .album-compare-indicator {
    border-color: var(--accent, #dc2626);
    background: rgba(0, 0, 0, 0.7);
}

/* Checked */
.album-compare-input:checked + .album-compare-indicator {
    border-color: var(--accent, #dc2626);
    background: var(--accent, #dc2626);
}

.album-compare-input:checked + .album-compare-indicator::after {
    /* checkmark via box/border trick */
    width: 0.5rem;
    height: 0.85rem;
    border: solid #fff;
    border-width: 0 2.5px 2.5px 0;
    border-radius: 0;
    background: transparent;
    transform: rotate(45deg);
    margin-top: -2px;
}

/* Focus-visible ring */
.album-compare-input:focus-visible + .album-compare-indicator {
    outline: 2px solid var(--accent, #dc2626);
    outline-offset: 2px;
}

/* Selected card glow */
.album-card.album-compare-selected {
    outline: 2px solid var(--accent, #dc2626);
    outline-offset: 2px;
    box-shadow: 0 0 20px rgba(220, 38, 38, 0.25);
}

/* ============================================================
   FLOATING COMPARE BAR
   ============================================================ */

.album-compare-bar {
    position: fixed;
    bottom: -5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: calc(var(--z-header, 1000) + 1);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-elevated, #27272a);
    border: 1px solid var(--border-secondary, rgba(255, 255, 255, 0.1));
    border-radius: var(--radius-lg, 12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    transition: bottom 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: calc(100vw - 2rem);
}

.album-compare-bar--visible {
    bottom: 1.5rem;
}

/* Account for bottom mobile nav when present */
@media (max-width: 768px) {
    .album-compare-bar--visible {
        bottom: 5rem;
    }
}

.album-compare-bar__info {
    flex: 1;
    min-width: 0;
}

.album-compare-bar__names {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary, #d1d5db);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 30ch;
}

.album-compare-bar__actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.album-compare-bar__btn {
    padding: 0.5rem 1.25rem !important;
    font-size: 0.875rem !important;
    min-height: unset !important;
}

.album-compare-bar__hint {
    font-size: 0.8125rem;
    color: var(--text-muted, #9ca3af);
    white-space: nowrap;
}

.album-compare-bar__clear {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0 !important;
    min-height: unset !important;
    font-size: 1.25rem;
    line-height: 1;
    border: none;
    background: transparent;
    color: var(--text-muted, #9ca3af);
    cursor: pointer;
    border-radius: var(--radius-sm, 4px);
    transition: color var(--transition-fast, 150ms) ease,
                background var(--transition-fast, 150ms) ease;
}

.album-compare-bar__clear:hover {
    color: var(--text-primary, #fff);
    background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
   COMPARE DIALOG
   ============================================================ */

.album-compare-dialog {
    border: none;
    border-radius: var(--radius-lg, 12px);
    background: var(--bg-secondary, #0f0f0f);
    color: var(--text-primary, #fff);
    padding: 0;
    max-width: 960px;
    width: calc(100vw - 2rem);
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.7);
}

.album-compare-dialog::backdrop {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.album-compare-dialog__inner {
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

/* ---- Header ---- */
.album-compare-dialog__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-secondary, rgba(255, 255, 255, 0.1));
    flex-shrink: 0;
}

.album-compare-dialog__header h2 {
    font-size: 1.5rem;
    margin: 0;
    font-family: var(--font-display, 'Bebas Neue', sans-serif);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.album-compare-dialog__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary, #d1d5db);
    font-size: 1.5rem;
    line-height: 1;
    border-radius: var(--radius-sm, 4px);
    cursor: pointer;
    transition: background var(--transition-fast, 150ms) ease,
                color var(--transition-fast, 150ms) ease;
}

.album-compare-dialog__close:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary, #fff);
}

/* ---- Body ---- */
.album-compare-dialog__body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.album-compare-dialog__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    min-height: 200px;
    color: var(--text-muted, #9ca3af);
}

.album-compare-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent, #dc2626);
    border-radius: 50%;
    animation: album-compare-spin 0.7s linear infinite;
}

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

.album-compare-error {
    color: var(--accent, #dc2626);
    text-align: center;
    padding: 2rem;
}

/* ---- Tabs (mobile only) ---- */
.album-compare-tabs {
    display: none;
    gap: 0;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-secondary, rgba(255, 255, 255, 0.1));
}

.album-compare-tab {
    flex: 1;
    padding: 0.625rem 0.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted, #9ca3af);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast, 150ms) ease,
                border-color var(--transition-fast, 150ms) ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.album-compare-tab:hover {
    color: var(--text-secondary, #d1d5db);
}

.album-compare-tab--active {
    color: var(--accent, #dc2626);
    border-bottom-color: var(--accent, #dc2626);
}

/* ---- Two-column layout ---- */
.album-compare-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.album-compare-column {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ---- Cover ---- */
.album-compare-cover {
    width: 100%;
    max-width: 260px;
    aspect-ratio: 1;
    border-radius: var(--radius-md, 8px);
    overflow: hidden;
    margin-bottom: 1rem;
    background: var(--bg-tertiary, #18181b);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.album-compare-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ---- Title ---- */
.album-compare-title {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 0.25rem;
    font-family: var(--font-display, 'Bebas Neue', sans-serif);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ---- Era badge ---- */
.album-compare-era {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--text-muted, #9ca3af);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    padding: 0.2rem 0.75rem;
    margin-bottom: 0.75rem;
    text-align: center;
    letter-spacing: 0.02em;
}

/* ---- Meta (year / track count / duration / lyrics) ---- */
.album-compare-meta {
    width: 100%;
    margin: 0 0 0.5rem;
    padding: 0;
}

.album-compare-meta__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.375rem 0.375rem;
    border-bottom: 1px solid var(--border-tertiary, rgba(255, 255, 255, 0.05));
    border-radius: var(--radius-sm, 4px);
    transition: background var(--transition-fast, 150ms) ease;
}

.album-compare-meta__row dt {
    font-size: 0.8125rem;
    color: var(--text-muted, #9ca3af);
    font-weight: 500;
}

.album-compare-meta__row dd {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary, #fff);
    margin: 0;
}

/* Highlight differences */
.album-compare-diff dd {
    color: var(--accent, #dc2626);
}

.album-compare-diff {
    background: rgba(220, 38, 38, 0.06);
}

/* Winner highlight — green accent for the "better" value */
.album-compare-winner {
    background: rgba(34, 197, 94, 0.08);
}

.album-compare-winner dd {
    color: var(--color-success, #22c55e);
}

/* ---- Lyrics coverage stat ---- */
.album-compare-lyrics-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.album-compare-lyrics-pct {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.album-compare-lyrics-detail {
    font-size: 0.75rem;
    color: var(--text-muted, #9ca3af);
    font-weight: 400;
}

/* ---- Lyrics coverage progress bar ---- */
.album-compare-lyrics-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.album-compare-lyrics-bar__fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Description ---- */
.album-compare-desc {
    width: 100%;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md, 8px);
}

.album-compare-desc h4 {
    font-size: 0.75rem;
    color: var(--text-muted, #9ca3af);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 0.375rem;
    font-family: var(--font-primary, 'Inter', sans-serif);
    font-weight: 600;
}

.album-compare-desc p {
    font-size: 0.8125rem;
    color: var(--text-secondary, #d1d5db);
    line-height: 1.5;
    margin: 0;
}

/* ---- Track list ---- */
.album-compare-tracklist {
    width: 100%;
}

.album-compare-tracklist h4 {
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary, #d1d5db);
    font-family: var(--font-primary, 'Inter', sans-serif);
    text-transform: none;
    letter-spacing: 0;
    font-weight: 600;
}

.album-compare-tracklist__empty {
    font-size: 0.8125rem;
    color: var(--text-muted, #9ca3af);
    font-style: italic;
}

.album-compare-tracklist__list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: track;
}

.album-compare-tracklist__list li {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    padding: 0.3125rem 0;
    border-bottom: 1px solid var(--border-tertiary, rgba(255, 255, 255, 0.05));
    counter-increment: track;
    font-size: 0.8125rem;
    transition: background var(--transition-fast, 150ms) ease;
}

.album-compare-tracklist__list li:hover {
    background: rgba(255, 255, 255, 0.03);
}

.album-compare-tracklist__list li::before {
    content: counter(track) '.';
    flex-shrink: 0;
    width: 1.5em;
    text-align: right;
    color: var(--text-muted, #9ca3af);
    font-size: 0.75rem;
}

.album-compare-track__title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary, #d1d5db);
}

/* Lyrics badge on individual tracks */
.album-compare-track__lyrics-badge {
    flex-shrink: 0;
    font-size: 0.6875rem;
    color: var(--color-success, #22c55e);
    opacity: 0.7;
    line-height: 1;
}

.album-compare-track--has-lyrics .album-compare-track__title {
    color: var(--text-primary, #fff);
}

.album-compare-track__dur {
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted, #9ca3af);
    font-size: 0.75rem;
}

/* ---- Open album link ---- */
.album-compare-open-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent, #dc2626);
    text-decoration: none;
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: var(--radius-sm, 4px);
    transition: background var(--transition-fast, 150ms) ease,
                border-color var(--transition-fast, 150ms) ease,
                color var(--transition-fast, 150ms) ease;
}

.album-compare-open-link:hover {
    background: rgba(220, 38, 38, 0.1);
    border-color: var(--accent, #dc2626);
    color: #fff;
}

/* ============================================================
   RESPONSIVE: MOBILE
   ============================================================ */

@media (max-width: 640px) {
    .album-compare-dialog {
        max-width: 100vw;
        width: 100vw;
        max-height: 100vh;
        border-radius: 0;
        margin: 0;
    }

    .album-compare-dialog__inner {
        max-height: 100vh;
    }

    /* Show tabs, hide second column by default */
    .album-compare-tabs {
        display: flex;
    }

    .album-compare-columns {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .album-compare-column {
        display: none;
    }

    .album-compare-column--active {
        display: flex;
    }

    .album-compare-cover {
        max-width: 200px;
    }

    .album-compare-bar__names {
        max-width: 16ch;
    }
}

/* ============================================================
   LIGHT THEME OVERRIDES
   ============================================================ */

[data-theme="light"] .album-compare-indicator {
    border-color: rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.8);
}

[data-theme="light"] .album-compare-bar {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .album-compare-dialog {
    background: #fafafa;
    color: var(--text-primary, #1a1a2e);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .album-compare-dialog::backdrop {
    background: rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .album-compare-era {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.1);
    color: var(--text-secondary);
}

[data-theme="light"] .album-compare-desc {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .album-compare-lyrics-bar {
    background: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .album-compare-winner {
    background: rgba(34, 197, 94, 0.06);
}

[data-theme="light"] .album-compare-diff {
    background: rgba(220, 38, 38, 0.04);
}

[data-theme="light"] .album-compare-open-link {
    border-color: rgba(220, 38, 38, 0.2);
}

[data-theme="light"] .album-compare-open-link:hover {
    background: rgba(220, 38, 38, 0.06);
    color: var(--accent, #dc2626);
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    .album-compare-bar {
        transition-duration: 0.01ms;
    }
    .album-compare-lyrics-bar__fill {
        transition-duration: 0.01ms;
    }
    .album-compare-loading-spinner {
        animation-duration: 1.5s;
    }
}