:root {
    --primary-color: #003566;
    --secondary-color: #00A22B;
    --accent-color: #FFD700;
    --danger-color: #f44336;
    --success-color: #4CAF50;
    --bg-color: #000814;
    --text-color: #FFFFFF;
    --border-color: #4682B4;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Arial', sans-serif;
    min-height: 100vh;
}

.screen {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

h1 {
    color: var(--accent-color);
    margin: 30px 0;
    text-align: center;
    font-size: 2.5rem;
}

h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    text-align: center;
}

.btn-primary, .btn-secondary, .btn-danger {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    margin: 10px;
    min-width: 150px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #002244;
    transform: translateY(-2px);
}

.btn-primary:disabled {
    background-color: #666;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background-color: rgba(0, 162, 43, 0.1);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #d32f2f;
}

.message {
    padding: 15px 25px;
    border-radius: 8px;
    margin: 20px 0;
    font-weight: bold;
    text-align: center;
    min-width: 300px;
}

.message.success {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--success-color);
    border: 2px solid var(--success-color);
}

.message.error {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
}

.message.info {
    background-color: rgba(0, 53, 102, 0.2);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}