body.auth { min-height: 100vh; display: grid; place-items: center; padding: 32px 16px; position: relative; overflow-x: hidden; }
body.auth::before { content: ""; position: fixed; top: -30%; right: -20%; width: 80%; height: 120%; background: radial-gradient(closest-side, rgba(225,6,0,.16), transparent 70%); pointer-events: none; }
.auth-card { position: relative; width: 100%; max-width: 440px; background: var(--noir-2); border: 1px solid var(--linea); border-radius: 16px; padding: 34px; box-shadow: var(--shadow); animation: riseIn .6s cubic-bezier(.2,.7,.2,1) both; }
.auth-card.wide { max-width: 760px; }
.auth-card h1 { font-size: 1.7rem; margin: 26px 0 6px; }
.auth-card .sub { color: var(--tenue); font-size: .92rem; margin-bottom: 24px; }
.err { color: var(--rojo-viv); font-size: .86rem; min-height: 1.3em; margin-bottom: 10px; }
.alt-link { margin-top: 20px; text-align: center; color: var(--tenue); font-size: .88rem; }
.alt-link a { color: #fff; border-bottom: 1px solid var(--rojo); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.plan-pick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.plan-pick label { margin: 0; cursor: pointer; border: 1px solid var(--linea-2); border-radius: 10px; padding: 12px; background: var(--noir); transition: border-color .15s, box-shadow .15s; color: var(--texto); }
.plan-pick input { display: none; }
.plan-pick label:has(input:checked) { border-color: var(--rojo); box-shadow: 0 0 0 3px rgba(225,6,0,.18); }
.plan-pick b { display: block; font-family: var(--display); font-size: 1rem; color: #fff; }
.plan-pick .p { font-family: var(--mono); color: var(--rojo-viv); font-size: .85rem; }
.plan-pick small { display: block; color: var(--tenue); font-size: .74rem; margin-top: 4px; }
.cycle { display: inline-flex; background: var(--noir); border: 1px solid var(--linea-2); border-radius: 99px; padding: 3px; margin-bottom: 14px; }
.cycle button { border: 0; background: transparent; color: var(--tenue); font: 600 .8rem var(--sans); padding: 7px 16px; border-radius: 99px; cursor: pointer; }
.cycle button.on { background: var(--rojo); color: #fff; }
.terms { display: flex; gap: 10px; align-items: flex-start; font-size: .84rem; color: var(--tenue); margin: 12px 0 4px; cursor: pointer; }
.terms input { width: auto; margin-top: 3px; accent-color: var(--rojo); }
.terms a { color: #fff; border-bottom: 1px solid var(--rojo); }
.hint { font-family: var(--mono); font-size: .76rem; color: var(--tenue); margin-top: 6px; word-break: break-all; }
.hint b { color: #fff; font-weight: 500; }
.total { display: flex; justify-content: space-between; align-items: center; padding: 12px 14px; border-radius: 9px; background: var(--noir); border: 1px dashed var(--linea-2); margin: 4px 0 16px; font-size: .88rem; color: var(--tenue); }
.total b { color: #fff; font-family: var(--display); font-size: 1.1rem; }
@media (max-width: 640px) { .auth-card { padding: 24px 18px; } .row2, .plan-pick { grid-template-columns: 1fr; } }