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

:root {
    --glass-bg: transparent;
    --glass-border: rgba(255,255,255, 0.5);
    --blur: blur(15px);
    --russell-primary-color: #EBE6E0;
    --button-color: #5e5e5e;
    --text-dark-color: black;
    --text-dark-shadow-color: white;
    --text-light-color: white;
    --text-light-shadow-color: black;
    --link-color: var(--text-light-color);
    --link-shadow-color: var(--text-light-shadow-color);
    --input-bg: white;
    --input-text-color: var(--text-dark-color);
    --login-box-gaps: 1rem;
    --panel-padding: 2rem;
}

html, body {
    height: 100%;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    font-weight: 500;
}

/* ─── BACKGROUND ─── */
.background {   
    position: fixed;
    inset: 0;
    z-index: 0;
}

img.background {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

div.background {
    background-color: var(--russell-primary-color);
    background-size: cover;
    background-position: center;
}

/* ─── PAGE WRAPPER ─── */
.login {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-height: 100vh;
}

/* ─── TOP NAV BAR ─── */
.login-top {
    flex-shrink: 0;
    width: 100%;
    height: 50px;
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: end;
    padding: 0 var(--panel-padding);
    gap: 1rem;
}

.login-top-logo {
    height: 50%;
    display: flex;
}

    .login-top-logo a {
        display: flex;
    }

/* ─── MAIN CONTENT AREA ─── */
.login-main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* ─── LEFT PANEL (60%) ─── */
.login-panel-left {
    flex: 0 0 60%;
}

/* ─── RIGHT PANEL (40%) ─── */
.login-panel-right {
    flex: 0 0 40%;
    flex-wrap: wrap;
    align-content: space-between;
    align-items: start;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    display: flex;
    letter-spacing: 0.5px;
    padding: var(--panel-padding);
    border-left: 1px solid var(--glass-border);
}

    .login-panel-right a {
        color: var(--link-color);
        text-decoration: none;
        text-shadow: 0 0 1px var(--text-light-shadow-color), 2px 1px 2px var(--text-light-shadow-color);
    }

        .login-panel-right a:hover {
            color: var(--link-color);
            text-decoration: underline;
        }

/* ─── LOGIN FORM ─── */
.login-box {
    width: 100%;
    max-width: 415px;
}

.form-group {
    margin-bottom: var(--login-box-gaps);
}

    .form-group label {
        display: block;
        color: var(--text-light-color);
        text-shadow: 0 0 1px var(--text-light-shadow-color), 2px 1px 2px var(--text-light-shadow-color);
        margin-bottom: 0.25rem;
    }

    .form-group input {
        width: 100%;
        height: 40px;
        background: var(--input-bg);
        border: 1px solid var(--glass-border);
        border-radius: 0px;
        color: var(--input-text-color);
        padding: 0 1rem;
        outline: none;
        transition: border-color 0.25s ease, background 0.25s ease;
        -webkit-appearance: none;
    }

        .form-group input::placeholder {
            color: rgba(240, 236, 228, 0.25);
        }

.btn-login {
    height: 40px;
    padding-inline: 20px;
    background: white;
    color: var(--button-color);
    font-weight: 500;
    border: 1px solid var(--button-color);
    cursor: pointer;
    transition: opacity 0.2s ease, transform 0.15s ease;
}

    .btn-login:hover {
        opacity: 0.65;
    }

    .btn-login:active {
        transform: scale(0.99);
    }

.login-help {
    margin-top: var(--login-box-gaps);
    display: flex;
    justify-content: space-between;
    text-decoration: none;
}

.login .text-danger {
    text-shadow: 0 0 1px var(--text-dark-shadow-color), 0 0 2px var(--text-dark-shadow-color), 0 0 4px var(--text-dark-shadow-color);
    background: rgba(255, 255, 255, 0.55);
}

.login .text-warning {
    text-shadow: 0 0 1px var(--text-light-shadow-color), 0 0 2px var(--text-light-shadow-color), 0 0 4px var(--text-light-shadow-color);
    background: rgba(0, 0, 0, 0.45);
}

.login-external {
    margin-top: var(--login-box-gaps);
    border-top: 1px solid var(--glass-border);
    padding-top: var(--login-box-gaps);
    display: flex;
    justify-content: center;
}

.ms-signin, .ms-signin:active, .ms-signin:hover, .ms-signin:focus {
    background: url(/images/ms-symbollockup_signin_light.svg) no-repeat;
    width: 215px;
    height: 41px;
    border: none;
    border-radius: 0;
    color: transparent;
}

.ms-signin:hover {
    opacity: 0.65;
}

.login-footer {
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
    .login-panel-left {
        display: none;
    }

    .login-panel-right {
        flex: 1;
        border-left: none;
        padding: 2rem 1.5rem;
    }
}

@media (min-width: 1000px) {
    :root {
        --login-box-gaps: 1.5rem;
        --panel-padding: 2rem;
    }

    .login-top {
        height: 75px;
    }
}

@media (min-width: 1400px) {
    :root {
        --login-box-gaps: 1.5rem;
        --panel-padding: 3rem;
    }    

    .login-top {
        height: 100px;
    }
}