:root {
    --bg-black: #050505;
    --card-bg: rgba(10, 10, 15, 0.7);
    --accent-purple: #be69ff;
    --text-main: #ffffff;
    --text-dim: #aaa;
    --glass-border: rgba(255, 255, 255, 0.08);
    --glow-purple: 0 0 25px rgba(190, 105, 255, 0.4);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-black);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    display: flex;
    gap: 20px;
    padding: 20px;
    opacity: 0.15;
    filter: grayscale(1) brightness(0.5);
    pointer-events: none;
}

.bg-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bg-column:nth-child(even) {
    animation: scrollDown 60s linear infinite;
}

.bg-column:nth-child(odd) {
    animation: scrollUp 60s linear infinite;
}

.bg-item {
    width: 100%;
    aspect-ratio: 1;
    background: #111;
    border-radius: 10px;
    background-size: cover;
    background-position: center;
}

@keyframes scrollDown {
    from { transform: translateY(-50%); }
    to { transform: translateY(0); }
}

@keyframes scrollUp {
    from { transform: translateY(0); }
    to { transform: translateY(-50%); }
}

header {
    padding: 40px 5%;
    text-align: center;
    position: relative;
    z-index: 10;
}

.logo-img {
    max-width: 300px;
    height: auto;
    filter: drop-shadow(var(--glow-purple));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 100px;
    position: relative;
    z-index: 10;
}

.search-section {
    margin-bottom: 60px;
    text-align: center;
}

.search-section h1 {
    font-family: 'Outfit';
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(to right, #fff, var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.search-container {
    position: relative;
    max-width: 700px;
    margin: 40px auto;
}

input[type="text"] {
    width: 100%;
    padding: 25px 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    color: #fff;
    font-size: 20px;
    font-family: 'Inter';
    outline: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

input[type="text"]:focus {
    border-color: var(--accent-purple);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 30px rgba(190, 105, 255, 0.3);
    transform: scale(1.02);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.track-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 20px;
    transition: all 0.4s ease;
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    gap: 15px;
    animation: fadeIn 0.6s ease forwards;
}

.track-card:hover {
    transform: translateY(-15px);
    border-color: var(--accent-purple);
    background: rgba(190, 105, 255, 0.05);
    box-shadow: 0 30px 60px rgba(0,0,0,0.8), var(--glow-purple);
}

.track-cover {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

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

.track-info {
    padding: 5px;
}

.track-title {
    font-family: 'Outfit';
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 5px;
    color: #fff;
}

.track-artist {
    color: var(--accent-purple);
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 12px;
}

.track-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-dim);
}

.suggest-btn {
    width: 100%;
    padding: 16px;
    border-radius: 15px;
    border: none;
    background: #fff;
    color: #000;
    font-family: 'Outfit';
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.suggest-btn:hover {
    background: var(--accent-purple);
    color: #fff;
    transform: scale(1.03);
    box-shadow: var(--glow-purple);
}

.loader {
    display: none;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 50px auto;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

#notification {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 18px 40px;
    border-radius: 50px;
    background: #fff;
    color: #000;
    font-weight: 700;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .bg-animation {
        gap: 10px;
        opacity: 0.1; /* Reduce opacity on mobile for better focus */
    }
    
    .bg-column:nth-child(3), 
    .bg-column:nth-child(4) {
        display: none; /* Show only 2 columns on mobile for performance */
    }

    .logo-img {
        max-width: 200px;
    }

    .search-section h1 {
        font-size: 32px;
    }

    input[type="text"] {
        padding: 18px 25px;
        font-size: 16px;
    }

    .results-grid {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
    }

    .track-card {
        padding: 15px;
        border-radius: 20px;
    }

    .track-title {
        font-size: 18px;
    }

    #notification {
        width: 90%;
        bottom: 20px;
        padding: 15px 20px;
        font-size: 14px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo-img {
        max-width: 160px;
    }
    
    .search-section h1 {
        font-size: 26px;
    }
}