/* ===================================
   CSS Variables & Theme
   =================================== */

/* Default Dark Theme */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: linear-gradient(135deg, rgba(30, 30, 45, 0.9) 0%, rgba(20, 20, 35, 0.95) 100%);
    --bg-overlay: radial-gradient(ellipse at center, rgba(255, 107, 53, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(124, 58, 237, 0.06) 0%, transparent 40%);

    --accent-primary: #ff6b35;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #f472b6;
    --accent-success: #10b981;

    --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #f472b6 100%);
    --gradient-button: linear-gradient(135deg, #ff6b35 0%, #7c3aed 100%);

    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(255, 107, 53, 0.2);

    /* Theme icons */
    --icon-logo: '🎵';
    --icon-play: '▶';
    --icon-pause: '⏸';
    --icon-shuffle: '🔀';
    --icon-repeat: '🔁';
    --icon-volume: '🔊';
    --icon-mute: '🔇';

    /* Spacing (theme-independent) */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50%;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* 🐱 Tabby Cat Theme */
[data-theme="tabby"] {
    --bg-primary: #fff9f0;
    --bg-secondary: #ffefdb;
    --bg-tertiary: #ffe4bc;
    --bg-card: linear-gradient(135deg, rgba(255, 249, 240, 0.95) 0%, rgba(255, 228, 188, 0.98) 100%);
    --bg-overlay: radial-gradient(ellipse at center, rgba(255, 140, 0, 0.1) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 165, 0, 0.08) 0%, transparent 40%);

    --accent-primary: #e67e22;
    --accent-secondary: #f39c12;
    --accent-tertiary: #d35400;
    --accent-success: #27ae60;

    --gradient-primary: linear-gradient(135deg, #e67e22 0%, #f39c12 100%);
    --gradient-button: linear-gradient(135deg, #e67e22 0%, #d35400 100%);

    --text-primary: #5d4037;
    --text-secondary: #795548;
    --text-muted: #a1887f;

    --border-color: rgba(230, 126, 34, 0.2);
    --shadow-soft: 0 4px 15px rgba(230, 126, 34, 0.15);
    --shadow-glow: 0 0 25px rgba(230, 126, 34, 0.2);

    /* Cat-themed icons */
    --icon-logo: '🐱';
    --icon-play: '🐾';
    --icon-pause: '😼';
    --icon-shuffle: '🐈';
    --icon-repeat: '🔄';
    --icon-volume: '😺';
    --icon-mute: '😿';
}

/* 🌸 Sakura White Cat Theme */
[data-theme="sakura"] {
    --bg-primary: #fff0f5;
    --bg-secondary: #ffebf2;
    --bg-tertiary: #ffe1ef;
    --bg-card: linear-gradient(135deg, rgba(255, 240, 245, 0.95) 0%, rgba(255, 225, 239, 0.98) 100%);
    --bg-overlay: radial-gradient(ellipse at center, rgba(255, 105, 180, 0.1) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 182, 193, 0.08) 0%, transparent 40%);

    --accent-primary: #ff69b4;
    --accent-secondary: #f06292;
    --accent-tertiary: #ec407a;
    --accent-success: #66bb6a;

    --gradient-primary: linear-gradient(135deg, #ff69b4 0%, #f06292 100%);
    --gradient-button: linear-gradient(135deg, #ff69b4 0%, #ec407a 100%);

    --text-primary: #880e4f;
    --text-secondary: #ad1457;
    --text-muted: #c2185b80;

    --border-color: rgba(255, 105, 180, 0.2);
    --shadow-soft: 0 4px 15px rgba(255, 105, 180, 0.15);
    --shadow-glow: 0 0 25px rgba(255, 105, 180, 0.2);

    /* Sakura Cat-themed icons */
    --icon-logo: '🌸';
    --icon-play: '🐾';
    --icon-pause: '😽';
    --icon-shuffle: '🐈';
    --icon-repeat: '🔄';
    --icon-volume: '😺';
    --icon-mute: '😿';
}

[data-theme="tabby"] body {
    background-color: var(--bg-primary) !important;
}

[data-theme="tabby"] body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 249, 240, 0.45), rgba(255, 249, 240, 0.45)),
        url("tabby-bg.png?v=3") !important;
    background-size: cover !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    z-index: -1;
    opacity: 1 !important;
    filter: saturate(1.05) brightness(1.02);
    /* 本来の自然なトーンを維持 */
}

[data-theme="sakura"] body {
    background-color: var(--bg-primary) !important;
}

[data-theme="sakura"] body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 240, 245, 0.2), rgba(255, 240, 245, 0.3)),
        url("white-cat-bg.png?v=3") !important;
    background-size: cover !important;
    background-position: left center !important;
    /* 蟾ｦ遶ｯ縺ｫ蝗ｺ螳・*/
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    z-index: -1;
    opacity: 1 !important;
}

[data-theme="tabby"] body::after {
    display: none !important;
}

/* 🐱 Tabby Cat Specific Styles */
[data-theme="tabby"] .player-section,
[data-theme="tabby"] .input-section,
[data-theme="tabby"] .playlist-section {
    position: relative;
    border: 2px solid rgba(230, 126, 34, 0.4);
    box-shadow: 0 8px 32px rgba(230, 126, 34, 0.2);
}

/* Cat Ears */
[data-theme="tabby"] .player-section::before,
[data-theme="tabby"] .player-section::after {
    display: none;
    /* 猫耳を非表示 */
}

[data-theme="tabby"] .player-section::before {
    left: 15px;
    transform: rotate(-15deg);
}

[data-theme="tabby"] .player-section::after {
    right: 15px;
    transform: rotate(15deg);
}

/* Sakura theme Cat Ears */
[data-theme="sakura"] .player-section::before,
[data-theme="sakura"] .player-section::after {
    display: none;
    /* 猫耳を非表示 */
}

[data-theme="sakura"] .player-section::before {
    left: 15px;
    transform: rotate(-15deg);
}

[data-theme="sakura"] .player-section::after {
    right: 15px;
    transform: rotate(15deg);
}

/* Inner Pink ear */
[data-theme="sakura"] .player-section::after {
    box-shadow: inset 0 -10px 0 #ff69b4;
    /* This doesn't work on borders, use child or separate approach */
}

/* Let's refine ears for sakura */
[data-theme="sakura"] .player-section,
[data-theme="sakura"] .input-section,
[data-theme="sakura"] .playlist-section {
    position: relative;
    border: 2px solid rgba(255, 105, 180, 0.3);
    box-shadow: 0 8px 32px rgba(255, 105, 180, 0.15);
}

/* Animation for the cat theme */
@keyframes tail-wag {

    0%,
    100% {
        transform: rotate(0) scale(1);
    }

    50% {
        transform: rotate(10deg) scale(1.1);
    }
}

[data-theme="tabby"] .logo-icon {
    display: inline-block;
    animation: tail-wag 2.5s ease-in-out infinite;
    cursor: pointer;
}

[data-theme="tabby"] .logo-icon:active {
    transform: scale(0.9);
}

[data-theme="tabby"] .btn-primary {
    position: relative;
    overflow: hidden;
}

[data-theme="tabby"] .btn-primary::after {
    content: '🐾';
    position: absolute;
    right: -5px;
    top: -5px;
    font-size: 1.2rem;
    opacity: 0.15;
    transform: rotate(15deg);
}



/* ===================================
   Base Styles
   =================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}



body {
    font-family: 'Noto Sans JP', 'Outfit', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.5s ease;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6)),
        url("black-cat-bg.png?v=4") !important;
    background-size: cover !important;
    background-position: right 20% center !important;
    /* 蜿ｳ蛛ｴ縺ｫ蟇・○縺ｦ鬘斐′隕九∴繧九ｈ縺・↓隱ｿ謨ｴ */
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    pointer-events: none;
    z-index: -1;
}

/* ===================================
   App Container
   =================================== */
.app-container {
    position: relative;
    z-index: 10;
    max-width: 700px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
}

/* ===================================
   Header
   =================================== */
.header {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.logo h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

/* Header Controls */
.header-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* Theme & Language Selector Shared Styles */
.theme-selector,
.language-selector {
    position: relative;
}

.theme-btn,
.language-btn {
    min-width: 40px;
    width: auto;
    height: 40px;
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    gap: var(--spacing-xs);
}

.theme-btn:hover,
.language-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.theme-dropdown,
.language-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    min-width: 200px;
    /* 蠎・￡縺ｦ1蛻励↓蜿弱ａ繧・*/
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(20px);
}

.theme-dropdown.show,
.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option,
.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 10px var(--spacing-sm);
    /* 荳贋ｸ九↓蟆代＠菴咏區 */
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
    white-space: nowrap;
    /* 邨ｶ蟇ｾ縺ｫ謾ｹ陦後＆縺帙↑縺・*/
}

.theme-option:hover,
.language-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.theme-option.active,
.language-option.active {
    background: rgba(255, 107, 53, 0.2);
    color: var(--accent-primary);
}

.theme-icon {
    font-size: 1.3rem;
}

/* ===================================
   Input Section
   =================================== */
.input-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(20px);
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.input-header h2 {
    margin: 0;
}

.input-title-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-title {
    font-size: 1rem;
    font-weight: 500;
}

.toggle-icon-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-icon-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

.toggle-icon-btn span {
    transition: transform 0.3s ease;
}


.input-content {
    transition: all 0.3s ease;
}


textarea {
    width: 100%;
    min-height: 100px;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    transition: var(--transition-fast);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

textarea::placeholder {
    color: var(--text-muted);
}

/* ===================================
   View Tabs
   =================================== */
.view-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    padding: 6px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.view-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.view-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.view-tab.active {
    color: white;
    background: var(--gradient-button);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.view-container {
    display: none;
    animation: slideUp 0.4s ease;
}

.view-container.active {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Discovery Section
   =================================== */
.discover-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    backdrop-filter: blur(20px);
    margin-bottom: var(--spacing-md);
}

.search-box {
    margin-bottom: var(--spacing-md);
}

.search-input-wrapper {
    position: relative;
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

#searchInput {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

#searchInput:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.search-btn {
    width: 48px;
    background: var(--gradient-button);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(255, 107, 53, 0.3);
}

.search-filters {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-tag {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.filter-tag:hover {
    background: rgba(255, 107, 53, 0.2);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-right: 4px;
}

.search-results::-webkit-scrollbar {
    width: 4px;
}

.search-results::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
}

.search-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.search-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.search-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-color);
    transform: translateX(4px);
}

.search-item-art {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

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

.search-item-title {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-item-artist {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.search-item-actions {
    display: flex;
    gap: 8px;
}

.add-track-btn {
    background: rgba(255, 107, 53, 0.15);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.add-track-btn:hover {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.1);
}

.preview-track-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.preview-track-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--gradient-button);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* ===================================
   Player Section
   =================================== */
.player-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-glow);
}

.now-playing {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.album-art {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.album-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.album-art:hover img {
    transform: scale(1.1);
}




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

.track-title {
    font-size: 1.1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.track-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: var(--spacing-md);
}

.action-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.action-btn.active {
    color: #ef4444;
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.action-btn.link-btn {
    width: auto;
    height: 42px;
    padding: 0 1.25rem;
    border-radius: 100px;
    background: linear-gradient(135, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.15));
    border: 1px solid rgba(59, 130, 246, 0.5);
    color: #60a5fa;
    font-size: 0.95rem;
    font-weight: 700;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.15);
    letter-spacing: 0.02em;
}

.action-btn.link-btn:hover {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #fff;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.action-btn.link-btn span:first-child {
    font-size: 1.1rem;
}

/* Progress Bar */
.progress-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.1s linear;
}

.time {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 40px;
    text-align: center;
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.control-btn {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.play-btn {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.4);
}

.play-btn:hover {
    box-shadow: 0 6px 30px rgba(255, 107, 53, 0.5);
}

/* Volume */
.volume-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.volume-icon {
    font-size: 1rem;
}

#volumeSlider {
    width: 120px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right,
            var(--accent-primary) 0%,
            var(--accent-primary) 80%,
            rgba(255, 255, 255, 0.2) 80%,
            rgba(255, 255, 255, 0.2) 100%);
    border-radius: 3px;
    cursor: pointer;
    outline: none;
}

#volumeSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease;
}

#volumeSlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#volumeSlider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#volumeSlider::-moz-range-track {
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

#volumeSlider::-moz-range-progress {
    height: 6px;
    background: var(--accent-primary);
    border-radius: 3px;
}


/* ===================================
   Playlist Section
   =================================== */
.playlist-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.playlist-header h2 {
    font-size: 1rem;
    font-weight: 500;
}

.track-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.playlist {
    max-height: 300px;
    overflow-y: auto;
}

.empty-playlist {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
}

.empty-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.playlist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
    user-select: none;
}

/* Drag and Drop Styles */
.drag-handle {
    cursor: grab;
    padding: var(--spacing-sm) var(--spacing-sm);
    /* Increased hit area */
    margin: calc(-1 * var(--spacing-sm)) 0;
    /* Compensation for padding to maintain item height */
    color: var(--text-muted);
    font-size: 1.4rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
}

.drag-handle:hover {
    color: var(--accent-primary);
    opacity: 1;
    transform: scale(1.1);
}

.playlist-item:active .drag-handle {
    cursor: grabbing;
}

.playlist:active {
    cursor: grabbing;
}

.playlist-item.dragging {
    opacity: 0.2;
    background: var(--bg-tertiary);
    border: 1px dashed var(--accent-primary);
}

/* ===================================
   Track Actions & Buttons
   =================================== */
.track-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: auto;
}

.action-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.action-btn.link-btn,
.action-btn-sm.link-btn-sm {
    width: auto;
    min-width: fit-content;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.action-btn-sm.link-btn-sm {
    height: 24px;
    padding: 0 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.4);
    color: #60a5fa;
    flex-shrink: 0;
}

.action-btn-sm.link-btn-sm:hover {
    background: #3b82f6;
    color: #fff;
    border-color: #3b82f6;
}

/* Playlist Item Actions */
.item-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: var(--transition-fast);
    margin-left: var(--spacing-sm);
    pointer-events: auto;
    /* Ensure clickable */
}

/* Show actions on hover for desktop */
@media (hover: hover) {
    .playlist-item:hover .item-actions {
        opacity: 1;
    }
}

/* Always show actions on touch devices since there's no hover */
@media (hover: none) {
    .item-actions {
        opacity: 0.7;
    }
}

.action-btn-sm {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn-sm:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    transform: scale(1.1);
}

.link-btn-sm:hover {
    color: #4facfe;
    border-color: #4facfe;
    background: rgba(79, 172, 254, 0.1);
}

.playlist-item.drag-over {
    background: rgba(255, 107, 53, 0.15);
    box-shadow: inset 0 2px 0 var(--accent-primary), 0 5px 15px rgba(0, 0, 0, 0.2);
    transform: translateY(2px);
}

/* Ensure child elements don't steal the dragover/drop events */
.playlist.is-dragging .playlist-item * {
    pointer-events: none;
}

.playlist-item:last-child {
    border-bottom: none;
}

.playlist-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.playlist-item.active {
    background: rgba(255, 107, 53, 0.15);
    border-left: 3px solid var(--accent-primary);
}

.item-number {
    width: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.playlist-item.active .item-number {
    color: var(--accent-primary);
}

[data-theme="tabby"] .playlist-item.active::after {
    content: '🐾';
    font-size: 0.8rem;
    margin-left: auto;
}

.item-art {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.item-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.item-title {
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-artist {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-id {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
}

.item-actions {
    display: flex;
    gap: 4px;
    margin-left: var(--spacing-xs);
    opacity: 0;
    transition: var(--transition-fast);
}

.playlist-item:hover .item-actions {
    opacity: 1;
}

.action-btn-sm {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 4px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.action-btn-sm:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.action-btn-sm.active {
    color: #ef4444;
}

/* Share Button */
.btn-share {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-share:hover {
    background: rgba(255, 107, 53, 0.2);
    border-color: var(--accent-primary);
}

.playlist-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Share Dropdown */
.share-container {
    position: relative;
}

.share-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    min-width: 160px;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

.share-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.share-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.share-option .share-icon {
    width: 24px;
    text-align: center;
    font-size: 1rem;
}

/* Twitter/X button color */
#shareTwitter:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* LINE button color */
#shareLine:hover {
    background: rgba(6, 199, 85, 0.2);
}

/* Facebook button color */
#shareFacebook:hover {
    background: rgba(24, 119, 242, 0.2);
}

/* Copy button color */
#shareCopy:hover {
    background: rgba(255, 107, 53, 0.2);
}

/* ===================================
   Loading States
   =================================== */

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: var(--spacing-xs);
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg,
            rgba(255, 255, 255, 0.05) 25%,
            rgba(255, 255, 255, 0.1) 50%,
            rgba(255, 255, 255, 0.05) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    margin-bottom: 0;
    width: 60%;
}

/* Loading Progress Bar */
.loading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.loading-progress.show {
    transform: translateY(0);
    opacity: 1;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-align: center;
}

.progress-bar-container {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.3s ease;
}

/* Playlist Item Loading State */
.playlist-item.loading .item-title,
.playlist-item.loading .item-artist {
    opacity: 0.5;
}

/* Fade-in animation for loaded items */
.playlist-item.loaded {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading indicator in playlist item */
.item-loading-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===================================
   Toast
   =================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-tertiary);
    border: 1px solid var(--accent-primary);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Toast variants */
.toast.error {
    border-color: #ef4444;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25), rgba(220, 38, 38, 0.25));
}

.toast.success {
    border-color: var(--accent-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.25), rgba(5, 150, 105, 0.25));
}

.toast.warning {
    border-color: #f59e0b;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.25));
}

/* ===================================
   Error States
   =================================== */

/* Playlist item error state */
.playlist-item.error {
    border-left: 3px solid #ef4444;
    background: rgba(239, 68, 68, 0.08);
}

.playlist-item.error .item-artist {
    color: #ef4444;
}

.playlist-item.error .item-title {
    opacity: 0.7;
}

/* Error icon */
.error-icon {
    color: #ef4444;
    margin-left: var(--spacing-xs);
    font-size: 0.85rem;
    cursor: help;
}

/* Offline banner */
.offline-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    padding: var(--spacing-sm);
    text-align: center;
    font-weight: 500;
    font-size: 0.9rem;
    z-index: 1001;
    transform: translateY(-110%);
    transition: transform var(--transition-normal);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
    visibility: hidden;
}

.offline-banner.show {
    transform: translateY(0);
    visibility: visible;
}

/* Retry indicator */
.retry-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: var(--spacing-xs);
}

.retry-indicator .retry-spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: #f59e0b;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===================================
   UI Enhancements
   =================================== */

/* Active state for buttons */
.control-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.control-btn.active:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* Secondary buttons */
.btn-secondary {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 1.2rem;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}


/* Help modal */
.help-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    backdrop-filter: blur(5px);
}

.help-modal.show {
    opacity: 1;
    visibility: visible;
}

.help-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-width: 500px;
    width: 90%;
    backdrop-filter: blur(20px);
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.help-content h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Help Tabs */
.help-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.help-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.help-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.help-tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* Tab Content */
.help-tab-content {
    display: none;
}

.help-tab-content.active {
    display: block;
}

.shortcut-list {
    display: grid;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-fast);
}

.shortcut-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
}

.shortcut-item span {
    flex: 1;
    color: var(--text-secondary);
}

/* Usage Guide */
.usage-guide {
    max-height: 400px;
    overflow-y: auto;
}

.usage-section {
    margin-bottom: var(--spacing-lg);
}

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

.usage-section h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.usage-section p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.usage-section ol,
.usage-section ul {
    margin-left: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.usage-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

kbd {
    display: inline-block;
    padding: 0.35rem 0.65rem;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2), inset 0 -2px 0 rgba(0, 0, 0, 0.2);
    min-width: 45px;
    text-align: center;
    color: var(--text-primary);
}

.help-footer {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.donate-btn-help {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.donate-btn-help:hover {
    background: var(--accent-primary);
    color: white;
}

#closeHelpBtn {
    flex: 1;
    margin-top: 0;
}

[data-theme="sakura"] .help-footer {
    border-top-color: rgba(255, 105, 180, 0.2);
}

[data-theme="sakura"] .donate-btn-help {
    background: rgba(255, 105, 180, 0.1);
    border-color: #ff69b4;
    color: #ff69b4;
}

[data-theme="sakura"] .donate-btn-help:hover {
    background: #ff69b4;
    color: white;
}

/* Enhanced animations */
.control-btn:active {
    transform: scale(0.95);
}

.progress-bar:hover {
    height: 8px;
}

.progress-bar:hover .progress {
    box-shadow: 0 0 10px var(--accent-primary);
}

#volumeSlider:hover {
    height: 6px;
}

/* ===================================
   History Modal
   =================================== */

.history-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    backdrop-filter: blur(5px);
}

.history-modal.show {
    opacity: 1;
    visibility: visible;
}

.history-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    backdrop-filter: blur(20px);
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.history-header h3 {
    margin: 0;
    font-size: 1.3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-close {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.history-list {
    min-height: 100px;
}

.history-section {
    margin-bottom: var(--spacing-lg);
}

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

.history-section h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.history-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    transition: var(--transition-fast);
}

.history-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

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

.history-title {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

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

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.btn-icon.active {
    background: var(--gradient-primary);
}

.favorite-btn.active {
    color: #fbbf24;
}

.empty-history {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-history-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

/* ===================================
   Scrollbar
   =================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

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

/* PWA Safe Area Support */
body {
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* Touch-friendly adjustments */
@media (hover: none) and (pointer: coarse) {

    /* Larger tap targets for touch devices */
    .btn,
    .control-btn,
    .btn-secondary,
    .btn-icon {
        min-width: 44px;
        min-height: 44px;
    }

    .playlist-item {
        padding: var(--spacing-md);
        min-height: 60px;
    }

    /* Remove hover effects on touch */
    .control-btn:hover,
    .playlist-item:hover,
    .shortcut-item:hover {
        transform: none;
    }
}

/* Tablet Landscape */
@media (max-width: 1024px) and (orientation: landscape) {
    .app-container {
        padding: var(--spacing-md);
    }

    .player-section {
        max-width: 100%;
    }
}

/* Tablet Portrait & Mobile Landscape */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-sm);
        gap: var(--spacing-md);
    }

    .logo h1 {
        font-size: 1.8rem;
    }

    .logo p {
        font-size: 0.75rem;
    }

    .theme-btn,
    .language-btn {
        padding: 0 8px;
        font-size: 0.85rem;
        height: 36px;
    }

    .player-section {
        padding: var(--spacing-md);
    }

    .controls {
        gap: var(--spacing-md);
    }

    .control-btn {
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }

    .play-btn {
        width: 64px;
        height: 64px;
        font-size: 2rem;
    }

    /* Modal adjustments */
    .help-content,
    .history-content {
        width: 95%;
        max-width: none;
    }

    /* Playlist adjustments */
    .playlist-actions {
        flex-wrap: wrap;
    }

    .btn-secondary {
        font-size: 1rem;
    }
}

/* ===================================
   Mobile Optimization
   =================================== */
@media (max-width: 480px) {
    :root {
        --spacing-md: 0.85rem;
    }

    .app-container {
        padding: 0 10px;
        padding-bottom: calc(20px + env(safe-area-inset-bottom));
        gap: var(--spacing-sm);
    }

    /* Header: Centered & Compact */
    .header {
        padding: 15px 5px;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .header-controls {
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    /* Player: More comfortable targets */
    .player-section {
        padding: var(--spacing-md);
        border-radius: var(--radius-xl);
    }

    .controls {
        gap: 6px;
        width: 100%;
        justify-content: space-evenly;
    }

    .control-btn {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
    }

    .play-btn {
        width: 66px;
        height: 66px;
        font-size: 2.2rem;
    }

    /* Progress bar: Thickened for touch */
    .progress-container {
        padding: 12px 0;
    }

    .progress-bar {
        height: 8px;
        border-radius: 4px;
    }

    .track-title {
        font-size: 1.1rem;
    }

    /* Input: iOS specific fixes */
    .input-section textarea {
        min-height: 100px;
        font-size: 16px;
        /* Prevents auto-zoom on iOS */
    }

    /* Playlist: Modern touch list */
    .playlist-item {
        padding: 12px 10px;
        border-radius: var(--radius-md);
    }

    .item-art {
        width: 44px;
        height: 44px;
    }

    /* Link button: more prominent */
    .action-btn.link-btn {
        height: 40px;
        padding: 0 16px;
        font-size: 0.9rem;
    }

    /* Mobile: Show container, hide fixed buttons */
    .floating-buttons-container {
        display: flex;
        /* スマホ版では表示 */
        justify-content: center;
        gap: 16px;
        padding: 20px;
        margin-top: 40px;
    }

    /* Hide the fixed positioned buttons on mobile */
    body>.donate-btn-float,
    body>.help-btn {
        display: none !important;
        /* 固定ボタンを非表示 */
    }

    /* Buttons inside container: Static positioning */
    .floating-buttons-container .donate-btn-float,
    .floating-buttons-container .help-btn {
        position: static;
        /* スクロールに追従しない */
        display: inline-flex;
        width: 48px;
        height: 48px;
        font-size: 1.4rem;
        opacity: 0.8;
        margin: 0;
    }

    /* Show mobile action buttons in header */
    .mobile-action-buttons {
        display: flex !important;
        gap: 8px;
    }

    .mobile-action-btn {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        font-size: 1.3rem;
        transition: all 0.3s ease;
    }

    .mobile-action-btn:hover {
        background: rgba(255, 255, 255, 0.2);
        transform: scale(1.1);
    }

    /* Toggle button: Larger for touch */
    .toggle-icon-btn {
        min-width: 44px;
        height: 44px;
        padding: 8px 12px;
        font-size: 1.3rem;
    }

    /* Volume slider: Thicker for touch */
    #volumeSlider {
        height: 8px;
        width: 100px;
    }

    #volumeSlider::-webkit-slider-thumb {
        width: 20px;
        height: 20px;
    }

    #volumeSlider::-moz-range-thumb {
        width: 20px;
        height: 20px;
    }


    /* Theme-specific mobile backgrounds */
    [data-theme="sakura"] body::before {
        background-position: left 15% center !important;
        opacity: 0.7 !important;
    }

    [data-theme="tabby"] body::before,
    body::before {
        background-position: center !important;
        background-size: cover !important;
    }

    /* Modal adjustments */
    .help-content,
    .donate-content,
    .history-content {
        width: 95%;
        margin: 0 10px;
        padding: 20px;
        max-height: 85vh;
        border-radius: var(--radius-xl);
    }
}

/* Small devices (iPhone SE models) */
@media (max-width: 360px) {
    .logo h1 {
        font-size: 1.3rem;
    }

    .control-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .play-btn {
        width: 60px;
        height: 60px;
    }

    .controls {
        gap: 4px;
    }

    /* Even more subtle on tiny screens */
    .donate-btn-float,
    .help-btn {
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
        opacity: 0.65;
        /* Even more transparent */
        bottom: calc(18px + env(safe-area-inset-bottom));
    }

    .donate-btn-float {
        right: 72px;
    }
}

/* PWA Standalone Mode adjustments */
@media all and (display-mode: standalone) {
    body {
        padding-top: max(env(safe-area-inset-top), 10px);
    }

    .header {
        padding-top: 25px;
    }
}

/* PWA Standalone Mode Specific */
@media all and (display-mode: standalone) {

    /* Adjust for PWA fullscreen */
    body {
        padding-top: max(env(safe-area-inset-top), var(--spacing-sm));
    }

    /* Hide browser-specific elements */
    .browser-only {
        display: none !important;
    }
}

/* ===================================
   Language Selector
   =================================== */
.language-selector {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.language-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.language-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(1.05);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    z-index: 100;
}

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

/* Ranking Specific Styles */
.ranking-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: 0 var(--spacing-sm);
}

.ranking-tab {
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.ranking-tab.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

.ranking-badge {
    background: var(--accent-gradient);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: bold;
    margin-left: auto;
}

.ranking-play-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.loading-ranking {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-style: italic;
}


.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.language-option:hover {
    background: rgba(255, 255, 255, 0.1);
}

.language-option:active {
    transform: scale(0.98);
}

/* ===================================
   Donate & Help Floating Buttons
   =================================== */
/* 
   Temp: Hide all donate/support links 
   To restore: Delete the following block 
*/
.donate-btn-float,
#mobileDonateBtn,
.donate-btn-help,
.donate-modal {
    display: none !important;
}

/* Mobile Action Buttons in Header (hidden on desktop) */
.mobile-action-buttons {
    display: none;
    /* PC版では非表示 */
}

/* Desktop: Hide container, use fixed positioning */
.floating-buttons-container {
    display: none;
    /* PC版では非表示 */
}

.donate-btn-float,
.help-btn {
    position: fixed;
    bottom: 30px;
    width: 72px;
    /* さらにサイズアップ */
    height: 72px;
    border-radius: 50%;
    background: rgba(45, 45, 45, 0.85);
    /* 密度を少しアップ */
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 2.2rem;
    /* アイコンもさらに大きく */
}

.donate-btn-float {
    right: 114px;
    /* 30px(base) + 72px(btn) + 12px(gap) */
}

.help-btn {
    right: 30px;
}

.donate-btn-float:hover,
.help-btn:hover {
    transform: translateY(-5px) scale(1.1);
    background: #ff6b35;
    color: white;
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.5);
    opacity: 1;
    /* Full opacity on hover */
}

.donate-btn-float:active,
.help-btn:active {
    transform: scale(0.9);
}

/* Pulsing Heart Animation - More subtle/slower */
@keyframes heart-pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.08);
    }

    100% {
        transform: scale(1);
    }
}

.donate-icon {
    display: inline-block;
    animation: heart-pulse 3s ease-in-out infinite;
    /* Slower */
    filter: drop-shadow(0 0 5px rgba(255, 107, 53, 0.2));
}

[data-theme="tabby"] .donate-btn-float,
[data-theme="tabby"] .help-btn {
    background: rgba(230, 126, 34, 0.2);
    border-color: rgba(230, 126, 34, 0.4);
    color: #e67e22;
}

[data-theme="tabby"] .donate-btn-float:hover,
[data-theme="tabby"] .help-btn:hover {
    background: #e67e22;
    color: white;
}

[data-theme="tabby"] .donate-btn-float .donate-icon::before {
    content: '❤️';
    font-size: 2.2rem;
}

[data-theme="tabby"] .donate-btn-float .donate-icon {
    font-size: 0;
}

.help-footer {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    margin-top: var(--spacing-lg);
}

.donate-thanks {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.donate-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-gradient);
    border-radius: var(--radius-pill);
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.donate-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(230, 126, 34, 0.3);
    filter: brightness(1.1);
}

[data-theme="tabby"] .help-footer {
    border-top-color: rgba(230, 126, 34, 0.2);
}

/* ===================================
   Donate Modal
   =================================== */
.donate-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.donate-modal.show {
    opacity: 1;
    visibility: visible;
}

.donate-content {
    background: var(--bg-player);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 400px;
    text-align: center;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.donate-modal.show .donate-content {
    transform: scale(1);
}

.donate-content h3 {
    margin-bottom: var(--spacing-lg);
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
}

.donate-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.donate-option-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: white;
    font-weight: 600;
    transition: transform 0.2s ease, filter 0.2s ease;
    text-align: left;
}

.donate-option-btn:hover {
    transform: scale(1.02);
    filter: brightness(1.1);
}

.donate-option-btn.bmac {
    background: linear-gradient(135deg, #FFDD00 0%, #F4BD00 100%);
    color: #000;
}

.donate-option-btn.wishlist {
    background: linear-gradient(135deg, #232F3E 0%, #37475A 100%);
}

.option-icon {
    font-size: 1.5rem;
}

.btn-close-modal {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
}

[data-theme="tabby"] .donate-content {
    border: 2px solid rgba(230, 126, 34, 0.3);
    background: rgba(255, 249, 240, 0.95);
}

[data-theme="tabby"] .donate-content h3 {
    color: #e67e22;
}

[data-theme="tabby"] .donate-option-btn.bmac {
    background: #e67e22;
    color: white;
}

[data-theme="sakura"] .donate-content {
    border: 2px solid rgba(255, 105, 180, 0.3);
    background: rgba(255, 240, 245, 0.95);
}

[data-theme="sakura"] .donate-content h3 {
    color: #ff69b4;
}

[data-theme="sakura"] .donate-option-btn.bmac {
    background: #ff69b4;
    color: white;
}

/* Nyaa! Animation */
@keyframes nyaa-float {
    0% {
        transform: translateY(0) opacity(0);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(-50px) opacity(0);
    }
}

.nyaa-effect {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    font-weight: bold;
    font-size: 1.5rem;
    color: #e67e22;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: nyaa-float 1.5s ease-out forwards;

}

[data-theme="sakura"] .nyaa-effect {
    color: #ff69b4;
}