.billing-manager { margin: 1.25rem 0 2rem; padding: clamp(1.25rem, 2.5vw, 2rem); border: 1px solid #b7cde0; border-radius: 18px; background: #f5f9fd; }
.billing-manager[hidden], .billing-manager [hidden] { display: none !important; }
.billing-manager__heading { display: flex; justify-content: space-between; align-items: start; gap: 1rem; margin-bottom: 1.3rem; }
.billing-manager__heading h3 { margin: .2rem 0 0; color: #173552; font-size: clamp(1.45rem, 2vw, 1.9rem); }
.billing-manager__notice { min-height: 1.4rem; margin: 0 0 1rem; color: #34566f; }
.billing-manager__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.billing-manager__card { min-width: 0; padding: clamp(1.15rem, 2vw, 1.6rem); border: 1px solid #cbdbe8; border-radius: 14px; background: #fff; }
.billing-manager__card h4 { margin: 0 0 .9rem; color: #173552; font-size: 1.16rem; }
.billing-manager__card p { margin: .35rem 0 .8rem; color: #415b69; }
.billing-manager__actions { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; margin-top: 1rem; }
.billing-manager__actions button, .billing-manager__card > button { min-height: 44px; }
.billing-manager__card form { display: grid; gap: .8rem; margin-top: 1rem; }
.billing-manager__card form label { display: grid; gap: .35rem; color: #173552; font-size: .91rem; font-weight: 700; }
.billing-manager__card input { box-sizing: border-box; width: 100%; min-height: 48px; padding: .65rem .8rem; border: 1px solid #a8bfd0; border-radius: 9px; background: #fff; color: #173552; font: inherit; }
.billing-manager__card input:focus-visible { outline: 3px solid #8cb8df; outline-offset: 1px; }
.billing-manager__address-row { display: grid; grid-template-columns: 1fr 9rem; gap: .8rem; }
.billing-manager__hint { color: #587083; font-size: .85rem; line-height: 1.5; }
.billing-invoice { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: .25rem 1rem; padding: .8rem 0; border-top: 1px solid #e0e9f1; }
.billing-invoice strong { font-size: .95rem; }
.billing-invoice span { color: #587083; font-size: .88rem; }
.billing-invoice a { grid-column: 2; color: #1b527e; font-weight: 700; }
.billing-confirm { max-width: 440px; padding: 0; border: 1px solid #cbdbe8; border-radius: 16px; box-shadow: 0 20px 70px #102c3a40; }
.billing-confirm::backdrop { background: #102c3a75; }
.billing-confirm__panel { padding: 1.6rem; }
.billing-confirm h2 { margin: .4rem 0 .9rem; color: #173552; font-size: 1.5rem; }
.billing-confirm p:not(.account-label) { color: #415b69; line-height: 1.5; }
@media (max-width: 760px) { .billing-manager__grid { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .billing-manager__address-row { grid-template-columns: 1fr; } }