/* Sign in and sign up: an illustrated panel beside a clean form card. Builds on app.css tokens. */

.auth { position: relative; padding: clamp(20px, 4vw, 48px) 0 clamp(40px, 6vw, 72px); }
.auth::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: -1;
  background: radial-gradient(50% 60% at 85% 10%, color-mix(in srgb, var(--burgundy) 7%, transparent), transparent 70%),
              radial-gradient(40% 50% at 10% 90%, color-mix(in srgb, var(--gold-400) 12%, transparent), transparent 70%);
}
.auth-wrap { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(20px, 4vw, 56px); align-items: stretch; }

.auth-visual { position: relative; min-height: 600px; border-radius: 36px; overflow: hidden; isolation: isolate; box-shadow: var(--shadow-lg); animation: auth-in .8s var(--ease) both; }
.auth-visual img { position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; transform: scale(1.03); animation: drift-img 18s ease-in-out infinite alternate; }
@keyframes drift-img { to { transform: scale(1.09) translateY(-1.5%); } }
.auth-caption {
  position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 22px 24px; border-radius: 24px;
  background: rgba(255, 255, 255, .78); border: 1px solid rgba(255, 255, 255, .9); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 20px 40px -24px rgba(23, 21, 28, .45);
}
.auth-chip { display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px; background: var(--burgundy-50); color: var(--burgundy); font-size: .74rem; font-weight: 700; }
.auth-caption h2 { margin: 12px 0 6px; font-size: clamp(1.5rem, 2.4vw, 2rem); }
.auth-caption p { margin: 0; color: var(--ink-2); }
.auth-perks { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 7px; }
.auth-perks li { display: flex; align-items: center; gap: 10px; font-size: .92rem; font-weight: 600; color: var(--ink-2); }
.auth-perks i { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; flex-shrink: 0; background: var(--success); color: #fff; font-size: .62rem; }

.auth-panel { display: grid; align-items: center; }
.auth-card {
  width: 100%; max-width: 520px; margin: 0 auto; padding: clamp(26px, 4vw, 44px); border-radius: 32px;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); animation: auth-in .8s .1s var(--ease) both;
}
@keyframes auth-in { from { opacity: 0; transform: translateY(18px); } }
.auth-icon { width: 54px; height: 54px; border-radius: 18px; display: grid; place-items: center; font-size: 1.3rem; color: #fff; background: var(--brand-grad); box-shadow: 0 12px 24px -10px rgba(140, 28, 51, .7); }
.auth-card h1 { font-size: clamp(2rem, 3.4vw, 2.6rem); margin: 18px 0 6px; }
.auth-card > .muted { margin-bottom: 26px; }
.auth-card > .muted a { font-weight: 700; }

.input-icon { position: relative; }
.input-icon > i { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--ink-3); font-size: .95rem; pointer-events: none; transition: color .2s; }
.input-icon .input { padding-left: 46px; height: 54px; border-radius: 16px; background: var(--parchment); border-color: transparent; transition: background .2s, border-color .2s, box-shadow .2s; }
.input-icon .input:hover { border-color: var(--line-2); }
.input-icon .input:focus { background: #fff; border-color: var(--burgundy); box-shadow: 0 0 0 4px var(--burgundy-50); }
.input-icon:focus-within > i { color: var(--burgundy); }
.input-icon .input:user-invalid { border-color: var(--danger); background: #fdf1f2; }
.pw-toggle { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); width: 40px; height: 40px; border: 0; border-radius: 12px; background: transparent; color: var(--ink-3); cursor: pointer; }
.pw-toggle:hover { background: #fff; color: var(--ink); }
.input-icon:has(.pw-toggle) .input { padding-right: 52px; }

.pw-meter { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; margin-top: 2px; }
.pw-meter span { height: 4px; border-radius: 4px; background: var(--line); transition: background .3s; }
.pw-meter[data-level="1"] span:nth-child(1) { background: var(--danger); }
.pw-meter[data-level="2"] span:nth-child(-n+2) { background: var(--gold-400); }
.pw-meter[data-level="3"] span { background: var(--success); }
.pw-match { min-height: 1.2em; font-weight: 600; }
.pw-match.ok { color: var(--success); }
.pw-match.no { color: var(--danger); }

.grade-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.grade-chips label { cursor: pointer; }
.grade-chips input { position: absolute; opacity: 0; pointer-events: none; }
.grade-chips span { display: inline-flex; align-items: center; gap: 8px; height: 42px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-2); background: #fff; font-weight: 700; font-size: .84rem; color: var(--ink-2); transition: all .2s var(--ease); }
.grade-chips span i { color: var(--c); font-size: .8rem; transition: color .2s; }
.grade-chips label:hover span { border-color: var(--c); color: var(--ink); }
.grade-chips input:checked + span { background: var(--c); border-color: var(--c); color: #fff; box-shadow: 0 8px 18px -10px var(--c); transform: translateY(-1px); }
.grade-chips input:checked + span i { color: #fff; }
.grade-chips input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--c) 45%, white); outline-offset: 2px; }

.auth-form-fields .btn-block { margin-top: 8px; height: 56px; }
.auth-form-fields.sending [data-submit] { pointer-events: none; opacity: .85; }
.auth-note { display: flex; gap: 10px; align-items: flex-start; margin-top: 22px; padding: 12px 14px; border-radius: 14px; background: var(--parchment); font-size: .86rem; color: var(--ink-2); }
.auth-note i { margin-top: 3px; color: var(--ink-3); }

@media (max-width: 900px) {
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-visual { min-height: 300px; order: 2; }
  .auth-visual img { object-position: 50% 35%; }
}
@media (max-width: 640px) {
  .auth-card { padding: 24px 20px; border-radius: 26px; }
  .auth-visual { min-height: 360px; border-radius: 28px; }
}
@media (prefers-reduced-motion: reduce) { .auth-visual img { animation: none; } }