body {
    background: #f4f6fb;
    font-family: 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2.5rem 1rem;
}
.auth-card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e8ecf4;
    padding: 2.25rem;
    width: 100%;
    max-width: 560px;
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.auth-icon {
    width: 44px; height: 44px;
    background: #4f80f5;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.25rem;
}
.auth-icon i { color: #fff; font-size: 1.1rem; }
.auth-card h1 { font-size: 1.25rem; font-weight: 700; color: #1a1f2e; margin-bottom: .25rem; }
.auth-card .subtitle { font-size: .8125rem; color: #6b7489; margin-bottom: 1.75rem; }
.section-divider {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #9aa3b8;
    border-bottom: 1px solid #e8ecf4;
    padding-bottom: .4rem;
    margin: 1.5rem 0 1rem;
}
.form-label { font-size: .8rem; font-weight: 600; color: #3d4455; margin-bottom: .35rem; }
.form-control, .form-select {
    font-size: .875rem;
    border-color: #e8ecf4;
    border-radius: 8px;
    padding: .6rem .875rem;
}
.form-control:focus, .form-select:focus {
    border-color: #4f80f5;
    box-shadow: 0 0 0 3px rgba(79,128,245,.12);
}
.form-control.is-invalid, .form-select.is-invalid { border-color: #ef4444; }
.invalid-feedback { font-size: .75rem; }
.input-group-text {
    background: #f4f6fb;
    border-color: #e8ecf4;
    border-radius: 0 8px 8px 0 !important;
    cursor: pointer;
    color: #6b7489;
}
.input-group .form-control { border-radius: 8px 0 0 8px !important; }
.form-text { font-size: .75rem; }
.btn-primary {
    background: #4f80f5; border-color: #4f80f5;
    border-radius: 8px; font-size: .9rem; font-weight: 600; padding: .65rem;
}
.btn-primary:hover { background: #3d6ee0; border-color: #3d6ee0; }
.auth-footer { text-align: center; font-size: .8rem; color: #6b7489; margin-top: 1.25rem; }
.auth-footer a { color: #4f80f5; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }
.callout {
    background: #f4f6fb;
    border-left: 3px solid #4f80f5;
    border-radius: 0 8px 8px 0;
    padding: .65rem .9rem;
    font-size: .8rem;
    color: #4a5578;
    margin-bottom: 1rem;
}