h2,
h3 {
    text-align: center;
    background: linear-gradient(45deg, #2b5876, #4e4376);
    background-size: 200% 200%;
    color: white;
    padding: 5px 0;
    margin: 0;
    animation: gradientHeader 10s ease infinite;
}

.top-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 10px;
    background-color: #2d2d2d;
    border-bottom: 1px solid #3d3d3d;
}

.top-bar {
    transition: max-height 0.35s cubic-bezier(0.2,0.8,0.2,1), padding 0.25s ease, opacity 0.25s ease;
    max-height: 200px;
    overflow: hidden;
}

    .top-bar.collapsed {
        padding-top: 0;
        padding-bottom: 0;
        max-height: 0;
        opacity: 0;
        pointer-events: none;
    }

#toggleTopBarBtn {
    margin-left: 6px;
    padding: 6px 8px;
    border-radius: 4px;
    background: transparent;
    color: #e0e0e0;
    border: 1px solid rgba(255,255,255,0.06);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.15s ease;
}

    #toggleTopBarBtn:hover {
        background-color: rgba(255,255,255,0.04);
        transform: translateY(-1px);
    }

#user,
#key {
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px solid #4a4a4a;
    outline: none;
    background-color: #333;
    color: #e0e0e0;
    transition: all 0.3s ease;
}

    #user:focus,
    #key:focus {
        border-color: #4a90e2;
        box-shadow: 0 0 5px rgba(74, 144, 226, 0.5);
    }

#clearKeyBtn {
    padding: 6px 12px;
    border: none;
    background-color: #f44336;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

    #clearKeyBtn:hover {
        background-color: #d32f2f;
        animation: buttonPulse 1s infinite;
    }

#loadBtn {
    padding: 6px 12px;
    border: none;
    background-color: #4a90e2;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

    #loadBtn:hover {
        background-color: #357ABD;
        animation: buttonPulse 1s infinite;
    }