html, body {
    margin: 0 !important;
    padding: 0 !important;
    height: 100% !important;
    overflow: auto !important;
}
* {
    box-sizing: border-box;
}

/* Mobile-first responsive design */
.login-container {
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin: 0;
    padding: 20px;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.login-form-wrapper {
    margin: 0;
    padding: 20px;
    padding-bottom: 12px;
    width: 300px;
    max-width: 90vw;
    min-width: 280px;
}

/* Mobile styles (up to 768px) */
@media screen and (max-width: 768px) {
    .login-container {
        padding: 10px;
        background-attachment: scroll;
    }
    
    .login-form-wrapper {
        width: 100%;
        max-width: 350px;
        min-width: 280px;
        padding: 15px;
        margin: 0 10px;
    }
    
    .login_input {
        width: 100% !important;
        max-width: 280px;
        font-size: 16px !important; /* Prevents zoom on iOS */
        padding: 12px !important;
        height: auto !important;
    }
    
    .TSI_blue_button {
        width: 100% !important;
        max-width: 280px;
        font-size: 16px !important;
        padding: 12px 20px !important;
        height: auto !important;
    }
}

/* Small mobile styles (up to 480px) */
@media screen and (max-width: 480px) {
    .login-container {
        padding: 5px;
    }
    
    .login-form-wrapper {
        padding: 12px;
        margin: 0 5px;
        min-width: 260px;
    }
    
    .login_input {
        width: 100% !important;
        max-width: 260px;
        padding: 10px !important;
    }
    
    .TSI_blue_button {
        width: 100% !important;
        max-width: 260px;
        padding: 10px 15px !important;
    }
    
    .poweredby_box {
        bottom: 10px !important;
        left: 10px !important;
        right: 10px !important;
        text-align: center;
        font-size: 11px !important;
        padding: 5px !important;
    }
}

/* Very small windows - allow scrolling */
@media screen and (max-height: 500px) {
    .login-container {
        align-items: flex-start;
        padding: 10px;
        min-height: auto;
    }
    
    .login-form-wrapper {
        padding: 10px;
        margin: 10px 0;
    }
}

/* Landscape mobile styles */
@media screen and (max-height: 600px) and (orientation: landscape) {
    .login-container {
        align-items: flex-start;
        padding-top: 20px;
    }
    
    .login-form-wrapper {
        padding: 10px;
        margin-top: 10px;
    }
}

/* Extra small height - ensure form is accessible */
@media screen and (max-height: 400px) {
    .login-container {
        padding: 5px;
        align-items: flex-start;
    }
    
    .login-form-wrapper {
        padding: 8px;
        margin: 5px 0;
    }
    
    .login_input {
        padding: 8px !important;
        font-size: 14px !important;
    }
    
    .TSI_blue_button {
        padding: 8px 15px !important;
        font-size: 14px !important;
    }
}

/* High DPI displays */
@media screen and (-webkit-min-device-pixel-ratio: 2), 
       screen and (min-resolution: 192dpi) {
    .login-form-wrapper {
        /* Ensure crisp rendering on retina displays */
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Touch-friendly improvements */
@media (pointer: coarse) {
    .login_input, .TSI_blue_button {
        min-height: 44px !important; /* Apple's recommended touch target size */
    }
    
    .login_input {
        padding: 12px !important;
    }
    
    .TSI_blue_button {
        padding: 12px 20px !important;
    }
}

/* Form spacing improvements for mobile */
@media screen and (max-width: 768px) {
    .login-form-wrapper form > div {
        margin: 8px 0 !important;
    }
    
    .login-form-wrapper form > div:last-child {
        padding-top: 15px !important;
    }
}