body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #121212, #1e1e1e);
    color: #fff;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

h1 {
    margin-bottom: 2rem;
    font-weight: 300;
    font-size: 2rem;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

button {
    padding: 1rem;
    font-size: 1rem;
    border: none;
    width: 100%;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.3s ease;
}

button:hover {
    transform: scale(1.03);
}

input {
    width: 100%;
    padding: 0.75rem;
    margin: 0.5rem 0 1rem;
    border-radius: 8px;
    border: none;
    background: #333;
    color: #fff;
    font-size: 1rem;
    box-sizing: border-box;
}

.login-button {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 8px;
    background: #007bff;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.login-button:hover {
    background: #0056b3;
}

.start-btn {
    background: #28a745;
    color: white;
}

.start-btn:hover {
    background: #218838;
}

.stop-btn {
    background: #dc3545;
    color: white;
}

.stop-btn:hover {
    background: #c82333;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: #2c5364;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    max-width: 90%;
    width: 300px;
    box-shadow: 0 0 10px #000;
}

.modal-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
    gap: 1rem;
}

.confirm-btn {
    background: #dc3545;
    color: white;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    flex: 1;
}

.confirm-btn:hover {
    background: #c82333;
}

.cancel-btn {
    background: #6c757d;
    color: white;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    flex: 1;
}

.cancel-btn:hover {
    background: #5a6268;
}

.container {
    background: #232323;
    padding: 1rem 3rem 3rem;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.6);
    width: 100%;
    max-width: 400px;
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}