/* ============================================
   流光背景系统 v2 - 霓虹穿透效果
   核心理念：把黑变"透"，让光"亮"起来
   ============================================ */

.app {
    position: relative;
    background: #050508;
    overflow: hidden;
}

/* ============================================
   底层 Mesh Gradient 画布
   ============================================ */
.aurora-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    background: 
        radial-gradient(ellipse 120% 80% at 10% 20%, rgba(0, 255, 200, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 100% 100% at 90% 80%, rgba(255, 100, 200, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 80% 60% at 50% 50%, rgba(100, 150, 255, 0.06) 0%, transparent 50%);
}

/* ============================================
   主光斑 - 高饱和霓虹色 + Screen混合
   ============================================ */
.blob-primary {
    position: absolute;
    top: -40%;
    left: -30%;
    width: 90vw;
    height: 90vw;
    min-width: 700px;
    min-height: 700px;
    max-width: 1400px;
    max-height: 1400px;
    background: radial-gradient(circle, 
        rgba(0, 255, 220, 0.8) 0%, 
        rgba(0, 200, 255, 0.5) 25%,
        rgba(100, 100, 255, 0.3) 50%,
        transparent 70%
    );
    filter: blur(50px);
    mix-blend-mode: screen;
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    animation: blobFloat1 8s ease-in-out infinite;
    transition: all 1.5s ease;
}

/* 次光斑 - 右下角暖色 */
.blob-secondary {
    position: absolute;
    bottom: -50%;
    right: -35%;
    width: 85vw;
    height: 85vw;
    min-width: 650px;
    min-height: 650px;
    max-width: 1300px;
    max-height: 1300px;
    background: radial-gradient(circle, 
        rgba(255, 100, 200, 0.75) 0%, 
        rgba(255, 50, 150, 0.45) 25%,
        rgba(200, 50, 255, 0.25) 50%,
        transparent 70%
    );
    filter: blur(55px);
    mix-blend-mode: screen;
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation: blobFloat2 10s ease-in-out infinite;
    transition: all 1.5s ease;
}

/* 第三光斑 - 中央点缀 */
.blob-tertiary {
    position: absolute;
    top: 20%;
    left: 20%;
    width: 70vw;
    height: 70vw;
    min-width: 550px;
    min-height: 550px;
    max-width: 1000px;
    max-height: 1000px;
    background: radial-gradient(circle, 
        rgba(100, 200, 255, 0.6) 0%, 
        rgba(150, 100, 255, 0.35) 35%,
        transparent 65%
    );
    filter: blur(60px);
    mix-blend-mode: screen;
    border-radius: 50%;
    animation: blobFloat3 12s ease-in-out infinite;
    transition: all 1.5s ease;
}

/* 极光流 - 旋转的锥形渐变 */
.aurora-flow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        from 0deg at 50% 50%,
        transparent 0deg,
        rgba(0, 255, 200, 0.12) 45deg,
        transparent 90deg,
        rgba(255, 100, 255, 0.1) 135deg,
        transparent 180deg,
        rgba(100, 150, 255, 0.11) 225deg,
        transparent 270deg,
        rgba(255, 200, 100, 0.08) 315deg,
        transparent 360deg
    );
    filter: blur(50px);
    mix-blend-mode: screen;
    animation: auroraRotate 30s linear infinite;
    opacity: 1;
}

/* ============================================
   光斑动画 - 快速流动
   ============================================ */
@keyframes blobFloat1 {
    0%, 100% {
        transform: translate(0, 0) scale(1) rotate(0deg);
    }
    20% {
        transform: translate(100px, 80px) scale(1.15) rotate(10deg);
    }
    40% {
        transform: translate(50px, 150px) scale(0.9) rotate(-5deg);
    }
    60% {
        transform: translate(150px, 50px) scale(1.1) rotate(8deg);
    }
    80% {
        transform: translate(80px, 120px) scale(1.05) rotate(-3deg);
    }
}

@keyframes blobFloat2 {
    0%, 100% {
        transform: translate(0, 0) scale(1) rotate(0deg);
    }
    25% {
        transform: translate(-80px, -100px) scale(1.2) rotate(-10deg);
    }
    50% {
        transform: translate(-150px, -50px) scale(0.85) rotate(8deg);
    }
    75% {
        transform: translate(-60px, -130px) scale(1.1) rotate(-5deg);
    }
}

@keyframes blobFloat3 {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    33% {
        transform: translate(-80px, 60px) scale(1.25);
        opacity: 1;
    }
    66% {
        transform: translate(60px, -40px) scale(0.9);
        opacity: 0.9;
    }
}

@keyframes auroraRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   遮罩层 - 轻量化，让光透过来
   ============================================ */
.vignette-overlay {
    display: none;
}

.content-overlay {
    display: none;
}

/* ============================================
   播放状态 - 光效更快更强
   ============================================ */
.app.playing .blob-primary {
    animation: blobFloat1 5s ease-in-out infinite, blobBreath 1.5s ease-in-out infinite;
}

.app.playing .blob-secondary {
    animation: blobFloat2 6s ease-in-out infinite, blobBreath 2s ease-in-out infinite;
}

.app.playing .blob-tertiary {
    animation: blobFloat3 7s ease-in-out infinite, blobBreath 1.8s ease-in-out infinite;
}

.app.playing .aurora-flow {
    animation: auroraRotate 20s linear infinite;
    opacity: 1;
}

@keyframes blobBreath {
    0%, 100% {
        filter: blur(50px) brightness(1);
    }
    50% {
        filter: blur(40px) brightness(1.5);
    }
}

/* ============================================
   UI层 - 极致透明的磨砂玻璃
   ============================================ */
.sidebar {
    position: relative;
    z-index: 10;
    background: rgba(255, 255, 255, 0.03) !important;
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.main-content {
    position: relative;
    z-index: 5;
    background: rgba(255, 255, 255, 0.02) !important;
    backdrop-filter: blur(30px) saturate(150%);
    -webkit-backdrop-filter: blur(30px) saturate(150%);
}

.player-bar {
    position: relative;
    z-index: 20;
    background: rgba(0, 0, 0, 0.3) !important;
    backdrop-filter: blur(50px) saturate(180%);
    -webkit-backdrop-filter: blur(50px) saturate(180%);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* 内容区完全透明 */
.content-header {
    background: transparent !important;
}

.header-gradient {
    background: linear-gradient(
        180deg,
        var(--header-glow-color, rgba(0, 255, 200, 0.15)) 0%,
        transparent 100%
    ) !important;
    transition: all 2s ease;
    mix-blend-mode: screen;
}

.track-list {
    background: transparent;
}

.track-item {
    background: transparent;
    transition: all 0.2s ease;
    border-radius: 8px;
}

.track-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.track-item.playing {
    background: rgba(var(--accent-rgb, 0, 255, 200), 0.15);
    box-shadow: inset 0 0 30px rgba(var(--accent-rgb, 0, 255, 200), 0.1);
}

/* 推荐歌单 */
.recommended-playlists {
    background: transparent;
}

.playlist-card {
    background: rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
}

.playlist-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* ============================================
   鼠标跟随光效
   ============================================ */
.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, 
        var(--cursor-glow-color, rgba(0, 255, 200, 0.2)) 0%, 
        transparent 60%
    );
    border-radius: 50%;
    pointer-events: none;
    z-index: 3;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
    mix-blend-mode: screen;
}

.cursor-glow.active {
    opacity: 1;
}

/* ============================================
   底部播放器光晕
   ============================================ */
.player-glow {
    position: fixed;
    bottom: -50px;
    left: -10%;
    right: -10%;
    height: 250px;
    background: radial-gradient(ellipse 60% 100% at 50% 100%,
        var(--player-glow-color, rgba(0, 255, 200, 0.4)) 0%,
        transparent 70%
    );
    pointer-events: none;
    z-index: 0;
    filter: blur(40px);
    mix-blend-mode: screen;
    transition: all 2s ease;
    animation: playerPulse 4s ease-in-out infinite;
}

.app.playing .player-glow {
    animation: playerPulse 2s ease-in-out infinite;
}

@keyframes playerPulse {
    0%, 100% {
        opacity: 0.7;
        transform: scaleX(1) scaleY(1);
    }
    50% {
        opacity: 1;
        transform: scaleX(1.05) scaleY(1.15);
    }
}

/* ============================================
   导航项发光效果
   ============================================ */
.nav-item.active {
    background: rgba(var(--accent-rgb, 0, 255, 200), 0.15) !important;
    box-shadow: inset 0 0 20px rgba(var(--accent-rgb, 0, 255, 200), 0.1);
}

.playlist-item.active {
    background: rgba(var(--accent-rgb, 0, 255, 200), 0.12) !important;
}

/* 全屏播放器背景样式已移至 fullscreen.css */

/* ============================================
   滚动条发光
   ============================================ */
.main-content::-webkit-scrollbar-thumb {
    background: rgba(var(--accent-rgb, 0, 255, 200), 0.3);
    box-shadow: 0 0 10px rgba(var(--accent-rgb, 0, 255, 200), 0.3);
}

.main-content::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--accent-rgb, 0, 255, 200), 0.5);
}