.auth-page-main {
    padding: 8rem 0 4rem;
}

.page-shell {
    display: grid;
    grid-template-columns: 0.72fr 1.28fr;
    gap: 1.25rem;
    align-items: start;
}

.page-intro {
    position: sticky;
    top: 6.5rem;
    padding: 1.3rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--surface), var(--surface-soft));
    box-shadow: var(--shadow-soft);
}

.page-intro-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 1rem;
}

.page-intro-logo img {
    width: 46px;
    height: 46px;
    object-fit: cover;
    border-radius: 50%;
    background: var(--surface);
    border: 2px solid var(--surface);
}

.page-intro h1 {
    margin: 0 0 0.75rem;
    font-size: 2.1rem;
    font-weight: 850;
    line-height: 1.15;
}

.page-intro p {
    margin: 0;
    color: var(--muted);
    line-height: 1.75;
}

.intro-checklist {
    display: grid;
    gap: 0.7rem;
    margin: 1.2rem 0 0;
    padding: 0;
    list-style: none;
}

.intro-checklist li {
    display: flex;
    gap: 0.6rem;
    color: var(--text);
    font-weight: 700;
}

.intro-checklist i {
    color: var(--primary);
}

.portal-form {
    display: grid;
    gap: 1rem;
}

.form-panel {
    padding: 1.2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.form-panel-header {
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.form-panel-icon {
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 6px;
    background: var(--primary-soft);
    color: var(--primary);
}

.form-panel h2 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 830;
}

.form-panel p {
    margin: 0.2rem 0 0;
    color: var(--muted);
    line-height: 1.55;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.form-grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.form-grid .full {
    grid-column: 1 / -1;
}

.field-label {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    margin-bottom: 0.4rem;
    color: var(--text);
    font-weight: 760;
}

.field-label i {
    color: var(--primary);
}

.input-group .btn {
    min-width: 116px;
}

.input-group .invalid-feedback {
    width: 100%;
}

.teacher-uid-group .input-group-text {
    border-color: var(--border);
    background: var(--surface-soft);
    color: var(--primary);
    font-weight: 850;
}

.teacher-uid-group .form-control {
    font-weight: 760;
    letter-spacing: 0.04rem;
}

.portal-form .password-field .password-toggle {
    top: 2.35rem;
    transform: none;
}

.form-note {
    display: flex;
    gap: 0.7rem;
    align-items: flex-start;
    padding: 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface-soft);
    color: var(--muted);
    line-height: 1.6;
}

.form-note i {
    color: var(--primary);
    font-size: 1.1rem;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: flex-end;
}

.teacher-auth-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

body.auth-page {
    display: flex;
    flex-direction: column;
}

.auth-page .auth-page-main {
    flex: 1 0 auto;
}

.auth-page .portal-footer {
    margin-top: auto;
}

@media (max-width: 991.98px) {
    .page-shell,
    .teacher-auth-grid {
        grid-template-columns: 1fr;
    }

    .page-intro {
        position: static;
    }
}

@media (max-width: 767.98px) {
    .auth-page-main {
        padding-top: 7rem;
    }

    .form-grid,
    .form-grid.three {
        grid-template-columns: 1fr;
    }

    .form-actions .btn {
        width: 100%;
        justify-content: center;
    }
}