.auth-body {
    background:
            radial-gradient(circle at 85% 10%, rgba(41, 182, 246, 0.10), transparent 40%),
            radial-gradient(circle at 10% 90%, rgba(2, 136, 209, 0.06), transparent 45%),
            var(--bp-color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 56px 0;
}

.auth-shell {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
    max-width: 980px;
    margin: 0 auto;
}

.auth-card {
    background: var(--bp-color-surface);
    border: 1px solid var(--bp-color-border);
    border-radius: var(--bp-radius-xl);
    box-shadow: var(--bp-shadow-md);
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.auth-card__title {
    margin: 0 0 8px;
    font-family: var(--bp-font-heading);
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--bp-color-text);
}
.auth-card__lead {
    margin: 0 0 28px;
    color: var(--bp-color-text-muted);
    font-size: 15px;
    line-height: 1.55;
}

/* Form */
.auth-form { display: flex; flex-direction: column; gap: 18px; }
.auth-field { display: flex; flex-direction: column; gap: 8px; }
.auth-field__label {
    font-size: 14px;
    font-weight: 600;
    color: var(--bp-color-text);
}
.auth-field__input {
    width: 100%;
    padding: 13px 16px;
    background: var(--bp-color-surface);
    border: 1px solid var(--bp-color-border);
    border-radius: var(--bp-radius-sm);
    font-family: var(--bp-font-body);
    font-size: 15px;
    color: var(--bp-color-text);
    transition: border-color var(--bp-transition), box-shadow var(--bp-transition);
}
.auth-field__input:hover { border-color: var(--bp-color-border-strong); }
.auth-field__input:focus {
    outline: none;
    border-color: var(--bp-color-primary);
    box-shadow: 0 0 0 4px rgba(41, 182, 246, 0.15);
}

.auth-form__submit { margin-top: 8px; }
.auth-form__submit .btn-primary { width: 100%; }

/* Alerts */
.auth-alert {
    margin: 0 0 20px;
    padding: 14px 16px;
    border-radius: var(--bp-radius-sm);
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid transparent;
}
.auth-alert--error {
    background: #fff1f1;
    border-color: #f9c8c8;
    color: #8f2f2f;
}
.auth-alert--success {
    background: #ecfdf3;
    border-color: #b6e9c8;
    color: #166534;
}

/* Footer links */
.auth-links {
    margin-top: 22px;
    padding-top: 20px;
    border-top: 1px solid var(--bp-color-border);
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
    color: var(--bp-color-text-muted);
}
.auth-links a { font-weight: 600; }

/* Promo side */
.auth-promo {
    background: linear-gradient(135deg, #eaf6fd 0%, #d6ecfa 100%);
    border: 1px solid rgba(2, 136, 209, 0.12);
    border-radius: var(--bp-radius-xl);
    padding: 40px 36px;
    color: var(--bp-color-text);
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.auth-promo__title {
    margin: 14px 0 14px;
    font-family: var(--bp-font-heading);
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.01em;
}
.auth-promo__text {
    margin: 0 0 22px;
    color: var(--bp-color-text-muted);
    font-size: 15px;
    line-height: 1.6;
}
.auth-promo__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    color: var(--bp-color-text);
    font-size: 15px;
}
.auth-promo__list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.auth-promo__list li::before {
    content: "✓";
    color: var(--bp-color-primary);
    font-weight: 800;
    flex-shrink: 0;
}

@media (max-width: 860px) {
    .auth-shell { grid-template-columns: 1fr; max-width: 520px; }
    .auth-promo { order: -1; padding: 28px 28px; }
    .auth-promo__title { font-size: 22px; }
    .auth-card { padding: 32px 24px; }
}
@media (max-width: 480px) {
    .auth-main { padding: 32px 0; }
    .auth-card { padding: 28px 20px; }
    .auth-card__title { font-size: 24px; }
}