:root {
    --primary-bg: #222;
    --secondary-bg: #333;
    --text-color: #eee;
    --accent-color: #0298ab;
    --border-radius: 8px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; 
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 500px;
    background-color: var(--secondary-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    margin: 20px;
}

header {
    text-align: center;
    border-bottom: 1px solid #444;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

h1 {
    margin: 0;
}

.global-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 15px;
}

.toggle-control {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1em;
}

.toggle-control input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: relative;
    display: block;
    width: 50px;
    height: 25px;
    background-color: #555;
    border-radius: 25px;
    transition: background-color 0.3s;
}

.toggle-slider::after {
    content: "";
    position: absolute;
    top: 2.5px;
    left: 2.5px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

.toggle-control input:checked + .toggle-slider {
    background-color: var(--accent-color);
}

.toggle-control input:checked + .toggle-slider::after {
    transform: translateX(25px);
}

.player-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.audio-player {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: #2a2a2a;
    border-radius: var(--border-radius);
}

.file-name {
    margin: 0;
    font-size: 1.1em;
    flex-grow: 1;
}

.play-pause-btn {
    background-color: var(--accent-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: background-color 0.2s;
    width: 80px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.play-pause-btn:hover {
    background-color: #0097a7;
}