:root { font: 15px system-ui, sans-serif; color: #17191c; background: #fff; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; }
main { width: min(680px, 100%); margin: 0 auto; padding: 28px 20px 72px; }
header, .account-heading, .usage-heading { display: flex; align-items: center; justify-content: space-between; }
header { margin-bottom: 74px; }
a { text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: #17191c; font-size: 18px; font-weight: 650; }
.brand img { border-radius: 7px; }
h1 { margin: 0 0 8px; font-size: 32px; letter-spacing: -.04em; }
h2 { margin: 0 0 14px; font-size: 16px; }
p { margin: 8px 0; color: #646a71; line-height: 1.5; }
form { width: min(360px, 100%); margin-top: 26px; }
label { display: block; margin: 0 0 7px; font-size: 13px; font-weight: 550; }
input { display: block; width: 100%; height: 43px; margin-bottom: 12px; padding: 0 12px; border: 1px solid #d8dce0; border-radius: 6px; font: inherit; }
button { min-height: 40px; padding: 0 13px; border: 0; border-radius: 5px; background: #178447; color: #fff; font: inherit; cursor: pointer; }
button:hover { background: #116d39; }
button:disabled { cursor: default; opacity: .6; }
.text-button { min-height: 34px; padding: 0; background: none; color: #646a71; }
.text-button:hover { background: none; color: #17191c; }
#change-number { display: block; margin-top: 8px; }
#account-phone { margin: 0; }
#usage { margin: 26px 0; padding: 18px; border: 1px solid #e2e5e8; border-radius: 7px; }
.usage-heading span, #overage, #pending-change { color: #646a71; font-size: 13px; }
#minutes-used { margin: 17px 0 9px; color: #17191c; }
.meter { height: 6px; overflow: hidden; border-radius: 3px; background: #e8ebee; }
.meter span { display: block; height: 100%; border-radius: inherit; background: #178447; }
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 26px; }
.plan { padding: 17px; border: 1px solid #e2e5e8; border-radius: 7px; }
.plan.current { border-color: #178447; }
.plan p { font-size: 13px; }
.plan .price { margin: 0 0 12px; color: #17191c; font-size: 31px; font-weight: 650; }
.price span { color: #646a71; font-size: 13px; font-weight: 400; }
.plan-button { width: 100%; margin-top: 15px; }
.cancel { margin-top: 18px; color: #99504b; }
#status { min-height: 24px; margin-top: 20px; font-size: 13px; }
#status.error { color: #ad3434; }
[hidden] { display: none !important; }
@media (max-width: 520px) { header { margin-bottom: 55px; } .plans { grid-template-columns: 1fr; } }