:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --border: #2a2a4a;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

#app {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.upload-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s;
}

.upload-btn:hover {
    background: var(--accent-hover);
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

#player {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
}

#now-playing {
    text-align: center;
    margin-bottom: 20px;
}

#track-title {
    font-size: 1.1rem;
    font-weight: 500;
}

#progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    margin-bottom: 10px;
    cursor: pointer;
    position: relative;
}

#progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

#time-display {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

#controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

#controls button {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: color 0.2s, background 0.2s;
}

#controls button:hover {
    background: var(--border);
    color: var(--text-primary);
}

#controls button.active {
    color: var(--accent);
}

#shuffle-btn, #repeat-btn {
    font-size: 1.1rem;
}

#play-btn {
    width: 56px !important;
    height: 56px;
    background: var(--accent) !important;
    font-size: 1.8rem !important;
}

#play-btn:hover {
    background: var(--accent-hover) !important;
}

#volume {
    width: 100px;
    margin-left: 20px;
    accent-color: var(--accent);
}

#playlist {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
}

#playlist h2 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 500;
}

#search-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 15px;
    outline: none;
    transition: border-color 0.2s;
}

#search-input:focus {
    border-color: var(--accent);
}

#search-input::placeholder {
    color: var(--text-secondary);
}

.track-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
}

.track-item .track-name {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-item .track-artist {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#track-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.track-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.track-item:hover {
    background: var(--border);
}

.track-item.active {
    border-left: 3px solid var(--accent);
}

.track-item .track-name {
    font-size: 0.95rem;
}

.track-item .track-size {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.track-item .delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.track-item:hover .delete-btn {
    opacity: 1;
}

.track-item .delete-btn:hover {
    color: var(--accent);
}

.uploading-indicator {
    text-align: center;
    padding: 10px;
    color: var(--accent);
    font-size: 0.9rem;
}

#drop-zone {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(233, 69, 96, 0.15);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    pointer-events: none;
}

#drop-zone.visible {
    display: flex;
}

#drop-zone::after {
    content: "Drop tracks here";
    font-size: 2rem;
    color: var(--accent);
    font-weight: 600;
    border: 3px dashed var(--accent);
    padding: 40px 80px;
    border-radius: 16px;
}

@media (max-width: 480px) {
    #app {
        padding: 12px;
    }

    header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    h1 {
        font-size: 1.2rem;
    }

    #player {
        padding: 16px;
    }

    #controls {
        gap: 12px;
        flex-wrap: wrap;
    }

    #controls button {
        font-size: 1.1rem;
        padding: 6px;
    }

    #play-btn {
        width: 48px !important;
        height: 48px;
        font-size: 1.4rem !important;
    }

    #volume {
        width: 70px;
        margin-left: 0;
    }

    #playlist {
        padding: 16px;
    }

    .track-item {
        padding: 10px 12px;
    }

    .track-item .track-size {
        font-size: 0.7rem;
    }

    #drop-zone::after {
        font-size: 1.3rem;
        padding: 20px 40px;
    }
}