body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #333;
}

.controls {
    text-align: center;
    margin-bottom: 20px;
}

#addTimer {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

#addTimer:hover {
    background-color: #45a049;
}

.timers-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.timer-card {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timer-display {
    font-size: 3rem;
    margin: 20px 0;
    font-family: monospace;
}

.timer-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.timer-controls button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.timer-type {
    margin-bottom: 15px;
}

.timer-card.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
}

.timer-card.fullscreen .timer-display {
    font-size: 8rem;
}