/* Subset mínimo de iconos para login (evita Font Awesome completo ~150KB+) */
.fa {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    background-color: currentColor;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-position: center;
    mask-position: center;
}

.fa-envelope {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='black' d='M48 64C21.5 64 0 85.5 0 112c0 15.1 7.1 29.3 19.2 38.4L236.8 313.6c11.4 8.5 27 8.5 38.4 0L492.8 150.4c12.1-9.1 19.2-23.3 19.2-38.4c0-26.5-21.5-48-48-48H48zM0 176V384c0 35.3 28.7 64 64 64H448c35.3 0 64-28.7 64-64V176L294.4 339.2c-22.8 17.1-54 17.1-76.8 0L0 176z'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='black' d='M48 64C21.5 64 0 85.5 0 112c0 15.1 7.1 29.3 19.2 38.4L236.8 313.6c11.4 8.5 27 8.5 38.4 0L492.8 150.4c12.1-9.1 19.2-23.3 19.2-38.4c0-26.5-21.5-48-48-48H48zM0 176V384c0 35.3 28.7 64 64 64H448c35.3 0 64-28.7 64-64V176L294.4 339.2c-22.8 17.1-54 17.1-76.8 0L0 176z'/%3E%3C/svg%3E");
}

.fa-eye {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath fill='black' d='M288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM144 256a144 144 0 1 1 288 0 144 144 0 1 1 -288 0zm144-64c0 35.3-28.7 64-64 64c-7.1 0-13.9-1.2-20.3-3.3c-5.5-1.8-10.6 4.3-7.4 9.5c12.4 20.1 34.1 33.8 58.8 33.8c38.7 0 70-31.3 70-70c0-24.7-13.7-46.4-33.8-58.8c-5.2-3.2-11.3 1.9-9.5 7.4c2.1 6.4 3.3 13.2 3.3 20.3z'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 576 512'%3E%3Cpath fill='black' d='M288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM144 256a144 144 0 1 1 288 0 144 144 0 1 1 -288 0zm144-64c0 35.3-28.7 64-64 64c-7.1 0-13.9-1.2-20.3-3.3c-5.5-1.8-10.6 4.3-7.4 9.5c12.4 20.1 34.1 33.8 58.8 33.8c38.7 0 70-31.3 70-70c0-24.7-13.7-46.4-33.8-58.8c-5.2-3.2-11.3 1.9-9.5 7.4c2.1 6.4 3.3 13.2 3.3 20.3z'/%3E%3C/svg%3E");
}

.fa-eye-slash {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 640 512'%3E%3Cpath fill='black' d='M38.8 5.1C28.4-3.1 13.3-1.2 5.1 9.2S-1.2 34.7 9.2 42.9l592 464c10.4 8.2 25.5 6.3 33.7-4.1s6.3-25.5-4.1-33.7L525.6 386.7c39.6-40.6 66.4-86.1 79.9-118.4c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C465.5 68.8 400.8 32 320 32c-68.2 0-125 26.3-169.3 60.8L38.8 5.1zM223.1 149.5C248.6 133.2 282.7 122 320 122c84.8 0 153.4 68.6 153.4 153.4c0 33.4-10.7 64.3-28.9 89.4L378.9 273c6.9-15 10.9-31.7 10.9-49.6c0-61.9-50.1-112-112-112c-17.9 0-34.6 4-49.6 10.9L223.1 149.5zm-64.8 65.6l52.5 41.3c-6.4 15.4-9.8 32.5-9.8 50.5c0 61.9 50.1 112 112 112c14.3 0 28-2.7 40.6-7.5l55.6 43.7C410.1 477.9 367.6 490 320 490c-80.8 0-145.5-36.8-192.6-80.6C80.6 366 49.3 314 34.5 278.3c-3.3-7.9-3.3-16.7 0-24.6c9.3-22.3 25.1-50.1 47.1-77.1l76.7 38.5z'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 640 512'%3E%3Cpath fill='black' d='M38.8 5.1C28.4-3.1 13.3-1.2 5.1 9.2S-1.2 34.7 9.2 42.9l592 464c10.4 8.2 25.5 6.3 33.7-4.1s6.3-25.5-4.1-33.7L525.6 386.7c39.6-40.6 66.4-86.1 79.9-118.4c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C465.5 68.8 400.8 32 320 32c-68.2 0-125 26.3-169.3 60.8L38.8 5.1zM223.1 149.5C248.6 133.2 282.7 122 320 122c84.8 0 153.4 68.6 153.4 153.4c0 33.4-10.7 64.3-28.9 89.4L378.9 273c6.9-15 10.9-31.7 10.9-49.6c0-61.9-50.1-112-112-112c-17.9 0-34.6 4-49.6 10.9L223.1 149.5zm-64.8 65.6l52.5 41.3c-6.4 15.4-9.8 32.5-9.8 50.5c0 61.9 50.1 112 112 112c14.3 0 28-2.7 40.6-7.5l55.6 43.7C410.1 477.9 367.6 490 320 490c-80.8 0-145.5-36.8-192.6-80.6C80.6 366 49.3 314 34.5 278.3c-3.3-7.9-3.3-16.7 0-24.6c9.3-22.3 25.1-50.1 47.1-77.1l76.7 38.5z'/%3E%3C/svg%3E");
}

.fa-thumbs-up {
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='black' d='M313.4 32.9c26 5.2 42.9 30.5 37.7 56.5l-2.3 11.4c-5.3 26.7-15.1 52.1-28.8 75.2H464c26.5 0 48 21.5 48 48c0 18.5-10.5 34.6-25.9 42.6C497 275.4 504 288.9 504 304c0 23.4-16.8 42.9-38.9 47.1c4.4 7.3 6.9 15.8 6.9 24.9c0 21.3-13.9 39.4-33.1 45.6c.7 3.3 1.1 6.8 1.1 10.4c0 26.5-21.5 48-48 48H294.5c-19 0-37.5-5.6-53.3-16.1l-38.5-25.7C176 420.4 160 390.4 160 358.3V320 272 247.1c0-29.2 13.3-56.7 36-75l7.4-5.9c26.5-21.2 44.6-51 51.2-84.2l2.3-11.4c5.2-26 30.5-42.9 56.5-37.7zM32 192H96c17.7 0 32 14.3 32 32V448c0 17.7-14.3 32-32 32H32c-17.7 0-32-14.3-32-32V224c0-17.7 14.3-32 32-32z'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='black' d='M313.4 32.9c26 5.2 42.9 30.5 37.7 56.5l-2.3 11.4c-5.3 26.7-15.1 52.1-28.8 75.2H464c26.5 0 48 21.5 48 48c0 18.5-10.5 34.6-25.9 42.6C497 275.4 504 288.9 504 304c0 23.4-16.8 42.9-38.9 47.1c4.4 7.3 6.9 15.8 6.9 24.9c0 21.3-13.9 39.4-33.1 45.6c.7 3.3 1.1 6.8 1.1 10.4c0 26.5-21.5 48-48 48H294.5c-19 0-37.5-5.6-53.3-16.1l-38.5-25.7C176 420.4 160 390.4 160 358.3V320 272 247.1c0-29.2 13.3-56.7 36-75l7.4-5.9c26.5-21.2 44.6-51 51.2-84.2l2.3-11.4c5.2-26 30.5-42.9 56.5-37.7zM32 192H96c17.7 0 32 14.3 32 32V448c0 17.7-14.3 32-32 32H32c-17.7 0-32-14.3-32-32V224c0-17.7 14.3-32 32-32z'/%3E%3C/svg%3E");
}