/* Mobile Styles - Apple Music Native App Feel */

/* Bottom Sheet Modal */
.bottom-sheet-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.bottom-sheet-overlay.show {
    opacity: 1;
}

.bottom-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top-left-radius: var(--radius-2xl);
    border-top-right-radius: var(--radius-2xl);
    z-index: var(--z-modal);
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding-bottom: var(--safe-area-bottom);
}

.bottom-sheet.show {
    transform: translateY(0);
}

.bottom-sheet-handle {
    width: 36px;
    height: 5px;
    background: var(--fill-secondary);
    border-radius: var(--radius-full);
    margin: var(--space-sm) auto var(--space-md);
    flex-shrink: 0;
}

.bottom-sheet-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--space-lg) var(--space-xl);
}

/* Bottom Sheet Variants */
.bottom-sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 0.5px solid var(--separator);
}

.bottom-sheet-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
}

.bottom-sheet-close {
    font-size: var(--text-md);
    color: var(--apple-red);
    font-weight: var(--font-semibold);
}

/* Create Playlist Form */
.create-playlist-form {
    padding: var(--space-xl) 0;
}

.playlist-cover-picker {
    width: 160px;
    height: 160px;
    margin: 0 auto var(--space-xl);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.playlist-cover-picker:active {
    background: var(--fill-tertiary);
}

.playlist-cover-picker svg {
    width: 40px;
    height: 40px;
    fill: var(--text-tertiary);
}

.playlist-cover-picker span {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--fill-tertiary);
    border-radius: var(--radius-lg);
    font-size: var(--text-md);
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.form-input:focus {
    background: var(--fill-secondary);
}

.form-input::placeholder {
    color: var(--text-tertiary);
}

.form-textarea {
    width: 100%;
    min-height: 100px;
    padding: var(--space-md);
    background: var(--fill-tertiary);
    border-radius: var(--radius-lg);
    font-size: var(--text-md);
    color: var(--text-primary);
    resize: none;
    font-family: inherit;
}

.form-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.form-toggle-label {
    font-size: var(--text-md);
}

.toggle-switch {
    position: relative;
    width: 51px;
    height: 31px;
    background: var(--fill-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.toggle-switch.active {
    background: var(--system-green);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 27px;
    height: 27px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.toggle-switch.active::after {
    transform: translateX(20px);
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    padding-top: var(--space-lg);
}

.form-actions .btn-primary {
    flex: 1;
}

.form-actions .btn-secondary {
    flex: 1;
}

/* Add to Playlist Sheet */
.add-to-playlist-list {
    padding: var(--space-lg) 0;
}

.add-playlist-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 0.5px solid var(--separator);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.add-playlist-item:active {
    opacity: 0.7;
}

.add-playlist-artwork {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
}

.add-playlist-artwork img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.add-playlist-name {
    font-size: var(--text-md);
    font-weight: var(--font-medium);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.add-playlist-count {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.new-playlist-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    color: var(--apple-red);
    cursor: pointer;
}

.new-playlist-item svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.new-playlist-item span {
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
}

/* Touch Feedback */
@media (hover: none) and (pointer: coarse) {
    .touch-feedback {
        position: relative;
        overflow: hidden;
    }

    .touch-feedback::after {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
        opacity: 0;
        transform: scale(0);
        transition: opacity 0.3s, transform 0.3s;
    }

    .touch-feedback:active::after {
        opacity: 1;
        transform: scale(2);
    }
}

/* Haptic Feedback Simulation */
@keyframes haptic {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-1px);
    }

    75% {
        transform: translateX(1px);
    }
}

.haptic {
    animation: haptic 0.1s ease-in-out;
}

/* iOS-style Swipe Actions */
.swipeable {
    overflow: hidden;
    position: relative;
}

.swipe-actions {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.swipe-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: white;
}

.swipe-action.delete {
    background: #FF453A;
}

.swipe-action.more {
    background: var(--fill-secondary);
}

/* Pull to Refresh */
.pull-indicator {
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

.pull-indicator svg {
    width: 24px;
    height: 24px;
    fill: var(--text-secondary);
    transform: rotate(180deg);
    transition: transform var(--transition-normal);
}

.pull-indicator.ready svg {
    transform: rotate(0deg);
}

.pull-indicator.loading svg {
    animation: spin 0.8s linear infinite;
}

/* Responsive - Tablet & Desktop */
@media (min-width: 768px) {
    :root {
        --tab-bar-height: 0px;
    }

    /* Desktop Layout with Sidebar */
    #app {
        flex-direction: row;
    }

    .app-header {
        left: var(--sidebar-width);
        padding-left: var(--space-3xl);
        padding-right: var(--space-3xl);
    }

    .tab-bar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: var(--sidebar-width);
        height: 100%;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: calc(var(--safe-area-top) + var(--space-xl)) var(--space-lg) var(--space-xl);
        border-top: none;
        border-right: 0.5px solid var(--separator);
        gap: var(--space-xs);
    }

    .tab-item {
        flex-direction: row;
        justify-content: flex-start;
        gap: var(--space-md);
        padding: var(--space-md);
        width: 100%;
        border-radius: var(--radius-md);
    }

    .tab-item span {
        font-size: var(--text-md);
        font-weight: var(--font-medium);
    }

    .tab-item.active {
        background: var(--fill-tertiary);
    }

    .main-content {
        left: var(--sidebar-width);
        bottom: 0;
    }

    .mini-player {
        left: var(--sidebar-width);
        bottom: 0;
    }

    /* Content sections padding for desktop */
    .section-scroll {
        padding-left: var(--space-2xl);
        padding-right: var(--space-2xl);
    }

    .section-title {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }

    .horizontal-scroll {
        padding-left: var(--space-lg);
        padding-right: var(--space-lg);
    }

    .track-item {
        padding-left: var(--space-2xl);
        padding-right: var(--space-2xl);
    }

    .library-menu {
        padding: var(--space-2xl);
    }

    .playlist-grid {
        padding: 0 var(--space-lg);
    }

    .category-grid {
        padding: var(--space-md) var(--space-lg);
    }

    /* Larger Cards */
    .music-card {
        flex: 0 0 180px;
    }

    .card-artwork {
        width: 180px;
        height: 180px;
    }

    /* Grid Layouts */
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .playlist-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .browse-grid {
        grid-template-columns: repeat(3, 1fr);
        padding: var(--space-lg) var(--space-2xl);
    }

    .radio-grid {
        grid-template-columns: repeat(4, 1fr);
        padding: 0 var(--space-lg);
    }

    /* Search header */
    .search-header {
        padding: var(--space-md) var(--space-2xl);
    }

    /* Bottom Sheet - Centered Modal */
    .bottom-sheet {
        left: 50%;
        right: auto;
        width: min(500px, 90vw);
        transform: translateX(-50%) translateY(100%);
        border-radius: var(--radius-2xl);
        margin-bottom: var(--space-xl);
        max-height: 70vh;
    }

    .bottom-sheet.show {
        transform: translateX(-50%) translateY(0);
    }

    /* Now Playing - Not full screen on desktop */
    .now-playing {
        left: auto;
        right: 0;
        width: 400px;
        border-left: 0.5px solid var(--separator);
        transform: translateX(100%);
    }

    .now-playing.show {
        transform: translateX(0);
    }
}

@media (min-width: 1024px) {
    .section-scroll {
        padding-left: var(--space-4xl);
        padding-right: var(--space-4xl);
    }

    .category-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .playlist-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .browse-grid {
        grid-template-columns: repeat(4, 1fr);
        padding: var(--space-lg) var(--space-4xl);
    }

    .radio-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (min-width: 1400px) {
    .section-scroll {
        padding-left: var(--space-5xl);
        padding-right: var(--space-5xl);
    }

    .browse-grid {
        grid-template-columns: repeat(5, 1fr);
        padding: var(--space-lg) var(--space-5xl);
    }

    .category-grid {
        grid-template-columns: repeat(8, 1fr);
    }
}

/* Dark Mode is default - Light mode option */
@media (prefers-color-scheme: light) {
    /* Keep dark mode for Apple Music authentic experience */
}

/* Reduce Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast */
@media (prefers-contrast: high) {
    :root {
        --text-secondary: rgba(255, 255, 255, 0.8);
        --text-tertiary: rgba(255, 255, 255, 0.6);
        --separator: rgba(255, 255, 255, 0.3);
    }
}

/* Print Styles */
@media print {

    .tab-bar,
    .mini-player,
    .now-playing,
    .bottom-sheet,
    .context-menu {
        display: none !important;
    }
}