body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;        
    font-family: Arial, sans-serif;
    background: 
        url('extro_tube.png') left/contain no-repeat,
        linear-gradient(135deg, #90EE90 0%, #006400 100%);
}

.login-container {
    text-align: center;
    padding: 30px;
    background: rgba(255,255,255,0.2);
    border-radius: 15px;
}

.input-button-group {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    justify-content: center;
}

.input-column {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input {
    padding: 10px 15px;
    border: 2px solid #006400;
    border-radius: 20px;
    background: rgba(255,255,255,0.9);
    width: 200px;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    box-shadow: 0 0 5px rgba(0,100,0,0.5);
}

.extro-button {
    width: 120px;
    height: 120px;
    background: url('Extrobiping.png') center/contain no-repeat;
    cursor: pointer;
    border: none;
    background-color: transparent;
    flex-shrink: 0;
    position: relative;
    transition: all 0.2s ease;
    transform-style: preserve-3d;
}

.extro-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.1);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.extro-button:active {
    transform: translateY(3px) scale(0.95);
}

.extro-button:active::before {
    opacity: 1;
}

.error-message {
    color: red;
    margin-top: 15px;
    height: 20px;
    transition: all 0.3s ease;
}