/* ============================================================
   Bythorn Mail — přihlášení / registrace
   ============================================================ */

.auth-body {
  display: flex; flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Jemné teplé „skvrny“ v pozadí */
.auth-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.blob {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.55;
}
.blob-1 { width: 520px; height: 520px; left: -160px; top: -180px; background: var(--accent-soft); }
.blob-2 { width: 460px; height: 460px; right: -140px; bottom: -160px; background: var(--olive-soft); }

.auth-theme { position: fixed; top: 18px; right: 18px; z-index: 5; }
.auth-theme .icon-moon { display: none; }
[data-theme="dark"] .auth-theme .icon-sun { display: none; }
[data-theme="dark"] .auth-theme .icon-moon { display: block; }

.auth-wrap {
  position: relative; z-index: 1;
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: var(--s-7) var(--s-4);
  gap: var(--s-5);
}

/* --- Karta --------------------------------------------------- */
.auth-card {
  width: 100%; max-width: 940px;
  display: grid; grid-template-columns: 5fr 6fr;
  background: var(--bg-elev);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: card-in 480ms var(--ease-out);
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease);
}
.auth-card.is-leaving { opacity: 0; transform: translateY(-8px) scale(0.99); }
@keyframes card-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* --- Levý panel: značka -------------------------------------- */
.auth-brand {
  position: relative;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: var(--s-7);
  color: var(--on-accent);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(255,255,255,0.12), transparent 60%),
    linear-gradient(160deg, #C9841F 0%, var(--accent) 45%, #8F5809 100%);
  min-height: 520px;
}
.auth-brand::after {
  /* jemná textura */
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.35;
  background-image: radial-gradient(rgba(255,255,255,0.14) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(to bottom, transparent 20%, black 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 20%, black 100%);
}
.auth-brand > * { position: relative; z-index: 1; }

.brand-top { display: flex; align-items: center; gap: 12px; }
.logomark { display: inline-flex; color: var(--on-accent); }
.logomark-bg { fill: rgba(255,255,255,0.18); }
.logomark-letter { fill: var(--on-accent); }
.wordmark { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.wordmark em { font-style: normal; font-weight: 400; opacity: 0.85; }

.brand-body { margin: var(--s-8) 0; }
.brand-eyebrow { color: rgba(255,253,248,0.7); margin-bottom: var(--s-3); }
.brand-title {
  font-size: 30px; font-weight: 750; line-height: 1.15; letter-spacing: -0.02em;
  max-width: 12ch; margin-bottom: var(--s-4);
}
.brand-text { font-size: var(--fs-md); line-height: var(--lh-loose); color: rgba(255,253,248,0.82); max-width: 34ch; }

.brand-domains {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.brand-domains li {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 10px; border-radius: var(--r-full);
  background: rgba(255,253,248,0.12); backdrop-filter: blur(4px);
  font-size: var(--fs-sm); font-weight: 600; font-family: var(--font-mono);
}
.brand-domains .dot { box-shadow: 0 0 0 2px rgba(255,253,248,0.35); }

/* --- Pravý panel: formuláře ---------------------------------- */
.auth-forms { padding: var(--s-8) var(--s-8) var(--s-7); display: flex; flex-direction: column; justify-content: center; }

.auth-view { display: flex; flex-direction: column; gap: var(--s-6); }
.auth-view.is-active { animation: view-in 320ms var(--ease-out); }
@keyframes view-in { from { opacity: 0; transform: translateX(10px); } to { opacity: 1; transform: none; } }

.auth-head h2 { font-size: var(--fs-2xl); font-weight: 750; letter-spacing: -0.02em; margin-bottom: 6px; }
.auth-head .muted { font-size: var(--fs-md); }

.auth-form { display: flex; flex-direction: column; gap: var(--s-4); }
.auth-form .input { height: 46px; }
.btn-tall { height: 46px; font-size: 15px; margin-top: var(--s-1); }

.input-code {
  font-family: var(--font-mono); font-weight: 600; letter-spacing: 0.28em; text-transform: uppercase;
}
.input-code::placeholder { letter-spacing: 0.28em; }

.form-error {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; border-radius: var(--r-sm);
  background: var(--danger-soft); color: var(--danger);
  font-size: var(--fs-sm); font-weight: 600;
}
.form-error::before { content: "!"; display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px; border-radius: 50%; background: var(--danger); color: #fff; font-size: 11px; flex: none; }

.shake { animation: shake 360ms var(--ease); }
@keyframes shake {
  20% { transform: translateX(-4px); } 40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); } 80% { transform: translateX(2px); }
}

.auth-switch { font-size: var(--fs-md); color: var(--ink-2); }
.auth-switch a { font-weight: 600; }

/* --- Segmentový přepínač typu účtu ---------------------------- */
.segmented {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
  margin: 0; padding: 4px; border: 0;
  background: var(--bg-sunken); border-radius: var(--r-md);
}
.segment { position: relative; cursor: pointer; }
.segment input { position: absolute; opacity: 0; inset: 0; }
.segment-body {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; border-radius: 9px;
  font-size: var(--fs-sm); font-weight: 600; color: var(--ink-2);
  transition: background var(--t) var(--ease), color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.segment-body .icon { width: 16px; height: 16px; color: var(--ink-3); transition: color var(--t) var(--ease); }
.segment:hover .segment-body { color: var(--ink); }
.segment input:checked + .segment-body {
  background: var(--bg-elev); color: var(--ink); box-shadow: var(--shadow-sm);
}
.segment input:checked + .segment-body .icon { color: var(--accent); }
.segment input:focus-visible + .segment-body { box-shadow: var(--focus-ring); }

.multi-extra {
  display: flex; flex-direction: column; gap: var(--s-3);
  padding: var(--s-4); border-radius: var(--r-md);
  background: var(--accent-softer);
  animation: view-in 260ms var(--ease-out);
}
.multi-extra .input { background: var(--bg-elev); }
.note {
  display: flex; gap: 8px; align-items: flex-start;
  font-size: var(--fs-sm); line-height: var(--lh); color: var(--accent-ink);
}
.note .icon-sm { margin-top: 2px; flex: none; }
.note strong { font-weight: 650; font-family: var(--font-mono); font-size: 12px; }

.auth-foot { font-size: var(--fs-sm); }

/* --- Responzivita -------------------------------------------- */
@media (max-width: 860px) {
  .auth-card { grid-template-columns: 1fr; max-width: 520px; }
  .auth-brand { min-height: 0; padding: var(--s-6); }
  .brand-body { margin: var(--s-5) 0; }
  .brand-title { font-size: 22px; max-width: none; }
  .brand-text { display: none; }
  .brand-domains { display: none; }
  .auth-forms { padding: var(--s-6); }
}
@media (max-width: 480px) {
  .auth-wrap { padding: var(--s-4) var(--s-3); }
  .auth-card { border-radius: var(--r-lg); }
  .auth-forms { padding: var(--s-5) var(--s-4); }
  .segment-body span:last-child { font-size: 12px; }
}