.auth-body { overflow-x: hidden; }
.auth-shell { display: grid; min-height: 100vh; grid-template-columns: minmax(340px, .9fr) minmax(460px, 1.1fr); }
.auth-intro { display: flex; flex-direction: column; justify-content: space-between; padding: 42px clamp(34px, 6vw, 82px); background: #17171a; color: #fff; }
.auth-wordmark { width: max-content; color: #fff; font-family: var(--course-serif); font-size: 19px; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.auth-intro .eyebrow { margin: 0 0 16px; color: #aaa8ff; font-size: 10px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.auth-intro h1 { max-width: 570px; margin: 0 0 20px; font-family: var(--course-serif); font-size: clamp(42px, 5.8vw, 74px); font-weight: 400; letter-spacing: -.03em; line-height: 1.02; }
.auth-intro h1 em { color: #8e8df2; font-weight: 400; }
.auth-intro p { max-width: 550px; margin: 0; color: #ffffffb2; font-size: 14px; line-height: 1.65; }
.auth-back { width: max-content; color: #ffffff9e; font-size: 11px; text-decoration: none; }
.auth-panel { display: grid; place-items: center; padding: 44px; background: var(--course-bg); }
.auth-panel-inner { width: min(100%, 470px); padding: 36px; border: 1px solid var(--course-line); border-radius: 17px; background: #fff; box-shadow: 0 20px 60px #2d2b2414; }
.auth-kicker { margin: 0 0 7px; color: var(--course-accent); font-size: 9px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.auth-panel h2 { margin: 0 0 26px; font-family: var(--course-serif); font-size: 34px; font-weight: 400; }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 25px; border-bottom: 1px solid var(--course-line); }
.auth-tabs button { border: 0; border-bottom: 2px solid transparent; background: transparent; padding: 12px; color: var(--course-muted); font-size: 11px; font-weight: 700; cursor: pointer; }
.auth-tabs button[aria-selected="true"] { border-color: var(--course-accent); color: var(--course-accent-dark); }
.auth-form { display: grid; gap: 17px; }
.auth-form label { display: grid; grid-template-columns: 1fr auto; gap: 7px; font-size: 10px; font-weight: 700; }
.auth-form label span { color: var(--course-muted); font-size: 9px; font-weight: 400; }
.auth-form input { grid-column: 1 / -1; width: 100%; min-height: 45px; border: 1px solid var(--course-line); border-radius: 8px; background: #fffefa; padding: 10px 12px; outline: 0; }
.auth-form input:focus { border-color: var(--course-accent); box-shadow: 0 0 0 3px var(--course-accent-soft); }
.auth-form .course-button { width: 100%; margin-top: 2px; }
.auth-status { min-height: 17px; margin: -3px 0 0; color: #a33838; font-size: 10px; }
.auth-status.success { color: var(--course-green); }
.checkout-status { margin: 0 0 20px; border-radius: 9px; background: #f1efe9; color: var(--course-muted); padding: 12px; font-size: 10px; }
.checkout-status.success { background: var(--course-green-soft); color: var(--course-green); }
.checkout-status.error { background: #fff0f0; color: #a33838; }
.auth-support, .auth-note { margin: 18px 0 0; color: var(--course-muted); font-size: 10px; line-height: 1.5; text-align: center; }
.auth-support a { color: var(--course-accent-dark); }
.auth-forgot { justify-self: end; margin-top: -9px; color: var(--course-accent-dark); font-size: 10px; }
@media (max-width: 820px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-intro { min-height: 390px; gap: 55px; padding: 30px; }
  .auth-panel { padding: 28px 18px; }
  .auth-panel-inner { padding: 27px 22px; }
}