/* ============================================================================
   HomeIDS — pantalla de inicio de sesión
   Requiere brand-tokens.css + homeids-ui.css. Solo animaciones CSS.
   El intro de cortinas se autodestruye: .ids-curtain se puede quitar del DOM
   al terminar (animationend) o dejarlo, ya queda con pointer-events: none.
   ========================================================================= */

.login-shell {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 100vh;
  background: var(--app-bg);
}

/* --------------------------------------------------- panel de marca (izq) */
.login-brand {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  padding: 44px 48px;
  /* rojo plano: es el mismo tono que trae el PNG del logo, así no se ve el
     recuadro del archivo sobre el panel */
  background: var(--primary);
  color: #fff;
}
/* retícula técnica en movimiento lento */
.login-brand::before {
  content: "";
  position: absolute;
  inset: -30%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  transform: perspective(700px) rotateX(58deg);
  animation: brand-grid 22s linear 2s infinite;
}
/* halo diagonal que respira */
.login-brand::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 15% 10%, rgba(255, 255, 255, 0.22) 0%, transparent 55%);
  animation: brand-breathe 9s var(--ease-tech) 2s infinite;
}
.login-brand > * { position: relative; z-index: 1; }

@keyframes brand-grid {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 0 560px, 560px 0; }
}
@keyframes brand-breathe {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 1; }
}

.login-brand-logo {
  width: 210px;
  max-width: 46%;
  animation: brand-in 0.8s var(--ease-enter) 0.72s both;
}
.login-brand-copy { max-width: 30ch; animation: brand-in 0.8s var(--ease-enter) 0.82s both; }
.login-brand-copy h1 {
  font-family: var(--font-heading-bold);
  font-weight: 700;
  font-size: clamp(1.75rem, 3.2vw, 2.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.login-brand-copy p { margin: 0; font-size: 1rem; line-height: 1.55; color: rgba(255, 255, 255, 0.86); }

.login-brand-meta {
  display: flex;
  gap: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  animation: brand-in 0.8s var(--ease-enter) 0.92s both;
}
.login-brand-meta div { display: flex; flex-direction: column; gap: 2px; }
.login-brand-meta strong {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.login-brand-meta span {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: rgba(255, 255, 255, 0.72);
}

@keyframes brand-in {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

/* ------------------------------------------------------- panel form (der) */
.login-panel {
  display: grid;
  place-items: center;
  padding: 40px 32px;
}
.login-card {
  width: min(410px, 100%);
  display: flex;
  flex-direction: column;
  gap: 22px;
  animation: brand-in 0.8s var(--ease-enter) 0.88s both;
}
.login-card > header h2 {
  font-family: var(--font-heading-bold);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  color: var(--text-dark);
}
.login-card > header p { margin: 0; color: var(--text-muted); font-size: 0.9375rem; }
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 0.8125rem; }
.login-row a { color: var(--secondary); text-decoration: none; transition: color var(--motion-fast) var(--ease-tech); }
.login-row a:hover { color: var(--primary); text-decoration: underline; }
.login-foot { font-size: 0.75rem; color: var(--text-muted); text-align: center; }

/* toggle de tema, arriba a la derecha */
.login-theme {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 20;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--card-bg);
  color: var(--text-muted);
  cursor: pointer;
  box-shadow: var(--depth-1);
  transition: transform var(--motion-fast) var(--ease-tech), color var(--motion-fast) var(--ease-tech);
}
.login-theme:hover { transform: rotate(-12deg) scale(1.06); color: var(--primary); }

/* ------------------------------------------------- intro de cortinas */
.ids-curtain {
  position: fixed;
  inset: 0;
  z-index: 900;
  pointer-events: none;
  display: grid;
  place-items: center;
}
.ids-curtain i {
  position: absolute;
  top: 0; bottom: 0;
  width: 50.6%;
  background: var(--primary);
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
  animation: curtain-open 1.05s var(--ease-curtain) 0.38s both;
}
.ids-curtain i:first-child { left: 0; }
.ids-curtain i:last-child { right: 0; animation-name: curtain-open-right; }
.ids-curtain img {
  position: relative;
  width: 320px;
  max-width: 60vw;
  will-change: transform, opacity;
  animation: curtain-mark 0.72s var(--ease-curtain) both;
}
/* línea de corte que queda un instante en el centro */
.ids-curtain::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 50%;
  width: 2px;
  background: #fff;
  transform: translateX(-50%) scaleY(0);
  animation: curtain-seam 0.38s var(--ease-curtain) both;
}

/* una sola curva por elemento, sin tramos planos: nada se queda "trancado" */
@keyframes curtain-open       { from { transform: translateX(0); } to { transform: translateX(-100.5%); } }
@keyframes curtain-open-right { from { transform: translateX(0); } to { transform: translateX(100.5%); } }
@keyframes curtain-mark {
  0%   { opacity: 0; transform: scale(0.9); }
  40%  { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.03); }
}
@keyframes curtain-seam {
  from { transform: translateX(-50%) scaleY(0); opacity: 0.9; }
  to   { transform: translateX(-50%) scaleY(1); opacity: 0; }
}

/* ------------------------------------------------------------ responsive */
@media (max-width: 900px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-brand { padding: 32px 28px; min-height: 46vh; }
  .login-brand-meta { gap: 20px; }
}
@media (max-width: 768px) {
  #login_overlay {
    position: fixed !important;
    inset: 0 !important;
    width: 100% !important;
    max-width: 100vw !important;
    height: 100% !important;
    min-height: 100vh !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    background: var(--app-bg) !important;
    z-index: 10000 !important;
    display: flex !important;
    align-items: stretch !important;
    justify-content: stretch !important;
    box-sizing: border-box !important;
  }
  .login-shell {
    width: 100% !important;
    max-width: 100% !important;
    min-height: 100vh !important;
    display: flex !important;
    flex-direction: column !important;
    box-sizing: border-box !important;
  }
  .login-brand {
    padding: 24px 18px 18px !important;
    width: 100% !important;
    max-width: 100% !important;
    min-height: auto !important;
    gap: 12px !important;
    flex: none !important;
    box-sizing: border-box !important;
  }
  .login-brand-logo {
    width: 130px !important;
    max-width: 45% !important;
  }
  .login-brand-copy {
    max-width: 100% !important;
  }
  .login-brand-copy h1 {
    font-size: 1.3rem !important;
    margin-bottom: 6px !important;
  }
  .login-brand-copy p {
    font-size: 0.82rem !important;
    line-height: 1.35 !important;
  }
  .login-brand-meta {
    display: none !important;
  }
  .login-panel {
    padding: 20px 16px 36px !important;
    width: 100% !important;
    max-width: 100% !important;
    flex: 1 !important;
    display: flex !important;
    align-items: flex-start !important;
    box-sizing: border-box !important;
  }
  .login-card {
    width: 100% !important;
    max-width: 100% !important;
    gap: 16px !important;
    box-sizing: border-box !important;
  }
  .login-card > header h2 {
    font-size: 1.25rem !important;
  }
  .login-card > header p {
    font-size: 0.85rem !important;
  }
  .login-theme {
    top: 14px !important;
    right: 14px !important;
    width: 34px !important;
    height: 34px !important;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ids-curtain { display: none; }
}