body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    text-align: center;
    width: 350px;
}

h1 {
    color: #e74c3c;
    margin-bottom: 1.5rem;
}

.timer-display {
    font-size: 4rem;
    font-weight: bold;
    margin: 1rem 0;
    color: #2c3e50;
}

.controls {
    margin: 1.5rem 0;
}

button {
    background-color: #3498db;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 1rem;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

button:disabled {
    background-color: #95a5a6;
    cursor: not-allowed;
}

.session-type {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 1rem 0;
}

.session-counter {
    margin: 1rem 0;
    font-size: 1rem;
}

.settings {
    margin-top: 1.5rem;
    text-align: left;
}

.settings h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.settings label {
    display: block;
    margin: 0.5rem 0 0.2rem;
}

.settings input {
    width: 100%;
    padding: 0.3rem;
    margin-bottom: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.work-session {
    color: #e74c3c;
}

.break-session {
    color: #2ecc71;
}