:root {
  --navy: #1B2A4A;
  --navy-dark: #0F1B30;
  --navy-mid: #243660;
  --gold: var(--navy); /* compat: sem dourado */
  --gold-light: rgba(255,255,255,.75); /* compat */
  --gold-pale: rgba(27,42,74,.04); /* compat */
  --text-dark: #1a1a1a;
  --text-light: #666;
  --error: #B71C1C;
  --error-bg: #FFEBEE;
  --success: #1B5E20;
  --success-bg: #E8F5E9;
  --border: rgba(27,42,74,.18);
  --radius: 10px;
  --radius-lg: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scrollbar-gutter: stable; }

body {
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
  background: #f5f2ea;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  overflow: hidden;
  opacity: 1;
  transform: none;
  transition: opacity .22s ease, transform .22s ease;
}

body.is-entering { opacity: 0; transform: translateY(6px); }
body.is-leaving  { opacity: 0; transform: translateY(-6px); }

@media (prefers-reduced-motion: reduce) {
  body { transition: none !important; transform: none !important; }
}

/* ────────────────────────────────────
   FLIP CARD — Estrutura 3D
   ──────────────────────────────────── */

.auth-scene {
  width: 100%;
  max-width: 1120px;
  height: min(680px, calc(100vh - 56px));
  perspective: 1100px;
  padding: 28px;
  overflow: hidden;
}

.auth-flipper {
  position: relative;
  display: grid;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  height: 100%;
  will-change: transform;
  border-radius: 26px;
  overflow: hidden;
  background: #fff;
}

.auth-face {
  grid-area: 1 / 1;
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  height: 100%;
  overflow: hidden;
  transition: transform 0.65s ease-in-out;
}

.auth-front { transform: rotateY(0deg); }
.auth-back  { transform: rotateY(180deg); }

.auth-flipper.flipped .auth-front { transform: rotateY(-180deg); }
.auth-flipper.flipped .auth-back  { transform: rotateY(0deg); }

/* Bloqueia interação na face oculta */
.auth-back                          { pointer-events: none; }
.auth-flipper.flipped .auth-front   { pointer-events: none; }
.auth-flipper.flipped .auth-back    { pointer-events: auto; }

/* ────────────────────────────────────
   SPLIT LAYOUT (sem molde)
   ──────────────────────────────────── */

.auth-split {
  height: 100%;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  grid-template-areas: "brand panel";
  border-radius: 26px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 28px 70px rgba(15, 27, 48, .18);
}

.auth-split--admin {
  grid-template-columns: .95fr 1.05fr;
  grid-template-areas: "panel brand";
}

/* No verso (admin), subir levemente o bloco da marca */
.auth-split--admin .auth-brand .brand-logo,
.auth-split--admin .auth-brand .brand-text {
  transform: translateY(-14px);
}

.auth-brand {
  grid-area: brand;
  background: radial-gradient(900px 600px at 20% 20%, rgba(255,255,255,.10) 0%, transparent 55%),
              linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 55%, var(--navy-mid) 100%);
  color: #fff;
  padding: 54px 54px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  position: relative;
}

.brand-logo {
  width: 160px;
  height: 160px;
  object-fit: contain;
  filter: drop-shadow(0 18px 36px rgba(0,0,0,.30));
}

.brand-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: .2px;
  line-height: 1.15;
}

.brand-subtitle {
  font-size: 1rem;
  color: rgba(255,255,255,.82);
  line-height: 1.55;
  max-width: 420px;
}

/* Rodapé (não altera o posicionamento do conteúdo central) */
.brand-foot {
  position: absolute;
  left: 54px;
  right: 54px;
  bottom: 28px;
  font-size: .78rem;
  line-height: 1.4;
  color: rgba(255,255,255,.62);
  text-align: center;
}

.auth-panel {
  grid-area: panel;
  position: relative;
  padding: 54px 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.panel-inner {
  width: 100%;
  max-width: 420px;
}

/* Evita sobreposição do botão VOLTAR (admin) no conteúdo */
.auth-back .auth-panel { padding-top: 86px; }

.panel-title {
  color: var(--navy);
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: -.2px;
  margin-bottom: 6px;
}

.panel-subtitle {
  color: var(--text-light);
  font-size: .95rem;
  margin-bottom: 22px;
}

/* ────────────────────────────────────
   FORMULÁRIO
   ──────────────────────────────────── */

.auth-form { text-align: left; }

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.input-group {
  position: relative;
}

.field-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: #bbb;
  pointer-events: none;
  transition: color .2s;
}

.input-group:focus-within .field-icon {
  color: var(--navy);
}

.field input[type="email"],
.field input[type="password"] {
  width: 100%;
  border: 1.5px solid #ddd;
  border-radius: 8px;
  padding: 12px 14px 12px 38px;
  font-size: .93rem;
  color: var(--text-dark);
  background: #fafafa;
  outline: none;
  transition: border-color .2s, background .2s, box-shadow .2s;
  font-family: inherit;
}

.field input:focus {
  border-color: var(--navy);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(27,42,74,.12);
}

/* ────────────────────────────────────
   BOTÃO SUBMIT
   ──────────────────────────────────── */

.btn-submit {
  width: 100%;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--navy-dark);
  border: none;
  border-radius: 10px;
  padding: 13px;
  font-size: .97rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  font-family: inherit;
  margin-top: 6px;
}

.btn-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(27,42,74,.25);
}

.btn-submit:active {
  transform: translateY(0);
}

.btn-submit:disabled {
  opacity: .6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-submit--admin {
  background: linear-gradient(135deg, var(--navy), var(--navy-mid));
  color: #fff;
}

.btn-submit--admin:hover {
  box-shadow: 0 6px 20px rgba(27,42,74,.35);
}

/* ────────────────────────────────────
   BOTÃO ENGRENAGEM — topo/direita
   Mesmo padrão do botão voltar
   ──────────────────────────────────── */

.gear-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1.5px solid #e0e0e0;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  border-radius: 8px;
  transition: color .2s, border-color .2s, transform .25s;
  z-index: 2;
}

.gear-btn svg { width: 16px; height: 16px; }

.gear-btn:hover {
  color: var(--navy);
  border-color: var(--navy);
  transform: rotate(20deg);
}

.gear-btn:focus-visible {
  outline: 2px solid rgba(27,42,74,.35);
  outline-offset: 2px;
}

/* ────────────────────────────────────
   BOTÃO VOLTAR — canto sup. esquerdo
   ──────────────────────────────────── */

.back-btn {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1.5px solid #e0e0e0;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  border-radius: 8px;
  transition: color .2s, border-color .2s, transform .2s;
  z-index: 2;
}

.back-btn svg { width: 16px; height: 16px; }

.back-btn:hover {
  color: var(--navy);
  border-color: var(--navy);
  transform: translateX(-2px);
}

.back-btn:focus-visible {
  outline: 2px solid rgba(27,42,74,.35);
  outline-offset: 2px;
}

/* ────────────────────────────────────
   ALERTA
   ──────────────────────────────────── */

.alert-msg {
  padding: 11px 16px;
  border-radius: 8px;
  font-size: .86rem;
  margin-bottom: 16px;
  text-align: center;
  font-weight: 500;
  animation: alertSlide .2s ease-out;
}

@keyframes alertSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.alert-msg.error   { background: var(--error-bg); color: var(--error); }
.alert-msg.success { background: var(--success-bg); color: var(--success); }

/* ────────────────────────────────────
   RESPONSIVO
   ──────────────────────────────────── */

@media (max-width: 500px) {
  /* Mobile: mantém o flip, mas garante altura consistente para não "sumir" */
  body { overflow: hidden; }
  .auth-scene {
    height: min(780px, calc(100dvh - 32px));
    padding: 16px;
    overflow: hidden;
  }

  .auth-split,
  .auth-split--admin {
    grid-template-columns: 1fr;
    grid-template-areas: "brand" "panel";
  }

  .auth-brand {
    padding: 30px 22px;
    align-items: center;
    text-align: center;
    justify-content: center;
  }

  /* rodapé vira bloco normal para não sobrepor */
  .brand-foot {
    position: static;
    left: auto;
    right: auto;
    bottom: auto;
    margin-top: 16px;
  }

  .brand-logo { width: 120px; height: 120px; }

  .auth-panel {
    padding: 22px 18px;
    align-items: flex-start;
  }

  /* no mobile esta regra sobrescreve padding-top; aplica aqui também */
  .auth-back .auth-panel { padding-top: 74px; }

  /* permite rolar dentro do painel se faltar altura */
  .panel-inner { max-width: 440px; }
  .auth-panel { overflow: auto; -webkit-overflow-scrolling: touch; }
}