.auth-section {
    background: radial-gradient(80% 70% at 50% 0%, #1641a2 0%, #071a54 52%, #010b32 100%);
    min-height: calc(100vh - 84px);
    padding: 72px 0;
}

.auth-shell {
    width: min(100%, 620px);
    margin: 0 auto;
    padding: 36px;
    background: rgba(0, 0, 60, .8);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 24px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, .28);
}

.auth-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
    padding: 5px;
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 999px;
}

.auth-tab,
.auth-submit {
    appearance: none;
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.auth-tab {
    min-height: 48px;
    padding: 12px 16px;
    background: transparent;
    color: rgba(255, 255, 255, .76);
    transition: background-color .2s ease, color .2s ease;
}

.auth-tab.is-active {
    background: #ffcc00;
    color: #00188f;
}

.auth-panel {
    padding-top: 34px;
}

.auth-panel h1 {
    margin: 0;
    color: #fff;
    font-size: clamp(30px, 4vw, 42px);
    line-height: 1.15;
    text-align: center;
}

.auth-panel__lead {
    margin: 14px 0 30px;
    color: rgba(255, 255, 255, .78);
    font-size: 17px;
    line-height: 1.5;
    text-align: center;
}

.auth-login-form,
.auth-signup-form #registration-form {
    width: 100%;
    max-width: none;
    padding: 0;
    background: transparent;
    border-radius: 0;
}

.auth-login-form input {
    width: 100%;
    min-height: 56px;
    margin: 0;
    padding: 15px 18px;
    color: #fff;
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .3);
    border-radius: 12px;
    font: inherit;
}

.auth-login-form input::placeholder {
    color: rgba(255, 255, 255, .6);
}

.auth-login-form input:focus {
    border-color: #ffcc00;
    box-shadow: 0 0 0 3px rgba(255, 204, 0, .16);
    outline: 0;
}

.auth-login-form input[aria-invalid="true"] {
    border-color: #ff7676;
}

.auth-form-error {
    min-height: 20px;
    margin: 7px 0 12px;
    color: #ffb1b1;
    font-size: 13px;
    line-height: 1.4;
}

.auth-form-error:not(:empty) {
    margin-bottom: 20px;
}

.auth-submit {
    width: 100%;
    min-height: 56px;
    margin-top: 18px;
    padding: 15px 20px;
    color: #00188f;
    background: #ffcc00;
    font-size: 16px;
    letter-spacing: .04em;
}

.auth-submit:hover,
.auth-submit:focus-visible {
    background: #ffda35;
    outline: 0;
}

.auth-signup-form {
    margin-top: 28px;
}

.auth-signup-form #registration-form .newRegForm,
.auth-signup-form #registration-form form {
    max-width: none;
}

.auth-signup-form #registration-form form {
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 16px;
    padding: 22px;
}

.auth-signup-form #registration-form .form-footer {
    color: rgba(255, 255, 255, .75);
}

.auth-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 768px) {
    .auth-section {
        min-height: auto;
        padding: 36px 0;
    }

    .auth-shell {
        padding: 22px 16px;
        border-radius: 18px;
    }

    .auth-tab {
        min-height: 44px;
        font-size: 14px;
    }

    .auth-panel {
        padding-top: 28px;
    }

    .auth-panel__lead {
        font-size: 15px;
    }

    .auth-signup-form #registration-form form {
        padding: 16px;
    }
}