body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f4f4f9;
    margin: 0;
}

.countdown-container {
    background: #ffffff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.timer-display {
    font-size: 6rem;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
    letter-spacing: 3px;
}

/* YENİ: Düğmeleri alt alta sıralamak için */
.vertical-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px; /* Düğmeler arasına boşluk ekler */
}

.controls button {
    width: 100%; /* Düğmelerin aynı genişlikte olmasını sağlar */
    max-width: 200px; /* Maksimum genişlik sınırı */
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: background-color 0.3s;
}

#startStopBtn {
    background-color: #4CAF50;
    color: white;
}

#resetBtn {
    background-color: #f44336;
    color: white;
}

#settingsBtn {
    background-color: #2196F3;
    color: white;
}

/* Modal Stilleri aynı kaldı */
.modal {
    display: none; 
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 400px;
    border-radius: 10px;
    text-align: left;
}
/* Input ve buton stillerini burada ayarlayabilirsiniz */
.modal-content input, .modal-content button {
    width: calc(100% - 22px);
    padding: 10px;
    margin: 5px 0 15px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
}

#setTimerBtn {
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
}