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

body {
    font-family: 'Courier New', monospace;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #00ff00;
    height: 100vh;
    height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-container {
    background: #2d2d2d;
    border: 1px solid #555;
    border-radius: 8px;
    padding: 40px;
    width: min(400px, 100%);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
    color: #fff;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

.login-header p {
    font-size: 14px;
    color: #888;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #ccc;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: #1a1a1a;
    border: 1px solid #555;
    border-radius: 4px;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #00ff00;
    box-shadow: 0 0 5px rgba(0, 255, 0, 0.3);
}

.login-button {
    width: 100%;
    padding: 12px;
    background: #333;
    border: 1px solid #00ff00;
    border-radius: 4px;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.login-button:hover {
    background: #00ff00;
    color: #000;
}

.login-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-button:disabled:hover {
    background: #333;
    color: #00ff00;
}

.error-message {
    background: #4d1f1f;
    border: 1px solid #ff4444;
    color: #ff8888;
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: none;
    font-size: 14px;
}

.success-message {
    background: #1f4d1f;
    border: 1px solid #44ff44;
    color: #88ff88;
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: none;
    font-size: 14px;
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #555;
    border-radius: 50%;
    border-top-color: #00ff00;
    animation: spin 1s ease-in-out infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 480px) {
    .login-container {
        padding: 25px 20px;
    }

    .login-header h1 {
        font-size: 20px;
    }
}