/* ==========================================================================
   Login · Dark Modern Premium (Optimized)
   - Estilo Glassmorphism (translucidez) SIN filtros pesados
   - Centrado perfecto corregido
   - Fondo optimizado tipo imagen (sin lag)
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Modern Paleta Base */
  --bg:        #050505;
  --panel:     rgba(20, 20, 25, 0.5);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text:      #f4f4f5;
  --muted:     #a1a1aa;
  
  /* Violet Accent (coincide con SweetAlert) */
  --accent:    #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.35);
  --accent-h:  #8677ff;

  /* Inputs */
  --input-bg:  rgba(0, 0, 0, 0.4);
  --input-bd:  rgba(255, 255, 255, 0.1);
  --placeholder:#71717a;

  /* Sombra suave */
  --shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.8);
}

* { box-sizing: border-box; }
html, body { 
  height: 100%; 
  margin: 0;
  padding: 0;
}
html { -webkit-text-size-adjust: 100%; }

body {
  font: 400 16px/1.55 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  background-color: var(--bg);
  /* Fondo radial estático: Emula una imagen con efecto blur perfecto sin causar NADA de lag */
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(108, 92, 231, 0.18), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(56, 189, 248, 0.15), transparent 40%),
    radial-gradient(circle at 50% 50%, #050505, #050505);
  background-attachment: fixed;
}

/* ===== Layout ===== */
.wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  position: relative;
  z-index: 10;
}

.panel {
  width: 100%;
  max-width: 440px;
  background: var(--panel);
  /* Redujimos el blur un poco para mejorar rendimiento, 15px es muy optimizado */
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.05);
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
}

/* Sutileza de brillo lateral */
.panel::before {
  content: "";
  position: absolute; inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,.06), transparent 40%);
  z-index: -1;
}

/* ===== Header / Marca ===== */
.panel__header { margin-bottom: 32px; text-align: center; }

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.brand__logo {
  width: 64px; height: 64px;
  display: grid; place-items: center;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--accent) 0%, #38bdf8 100%);
  color: #fff;
  font-size: 28px;
  box-shadow: 0 10px 25px var(--accent-glow);
  margin-bottom: 8px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand__logo:hover {
  transform: scale(1.08) rotate(5deg);
}

.brand__title {
  margin: 0;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, #ffffff, #a1a1aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand__sub {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
}

/* ===== Alert ===== */
.alert {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(220, 38, 38, 0.1);
  color: #fca5a5;
  border: 1px solid rgba(220, 38, 38, 0.2);
  font-size: 14px;
}

/* ===== Form ===== */
.form { display: grid; gap: 20px; }

.field {
  display: grid;
  gap: 8px;
}

.field__label {
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  opacity: 0.9;
}

.field__input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--input-bd);
  background: var(--input-bg);
  color: var(--text);
  padding: 16px 16px;
  outline: none;
  font-size: 15px;
  transition: all .3s ease;
  caret-color: var(--accent);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.field__input::placeholder { color: var(--placeholder); font-weight: 400; }

.field__input:focus {
  border-color: var(--accent);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1), 0 0 0 4px var(--accent-glow);
  background: rgba(0, 0, 0, 0.6);
  transform: translateY(-2px);
}

.field__input:active { transform: translateY(0); }

/* Mostrar/ocultar contraseña */
.field__password {
  position: relative;
  display: grid;
}
.field__password .toggle {
  position: absolute;
  right: 12px; top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  color: var(--muted);
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  cursor: pointer;
  transition: all .2s ease;
}
.field__password .toggle:hover { color: var(--text); background: rgba(255,255,255,0.08); }
.field__password .toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Botón principal */
.btn {
  height: 56px;
  padding: 0 24px;
  border-radius: 14px;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all .4s cubic-bezier(0.34, 1.56, 0.64, 1);
  margin-top: 12px;
  width: 100%;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, #38bdf8 100%);
  color: #fff;
  box-shadow: 0 8px 25px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.btn--primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: all 0.6s ease;
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(108, 92, 231, 0.45);
}

.btn--primary:hover::before {
  left: 100%;
}

.btn--primary:active { 
  transform: translateY(1px); 
  box-shadow: 0 5px 15px rgba(108, 92, 231, 0.3);
}

.btn i, .btn svg {
  font-size: 1.1em;
}

/* Footer */
.panel__footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px dashed rgba(255,255,255,0.1);
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

/* ===== Accesibilidad ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Autofill (Chrome) ===== */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text);
  transition: background-color 99999s ease-in-out 0s;
  box-shadow: 0 0 0px 1000px rgba(0,0,0,0.8) inset;
  border: 1px solid var(--accent);
}

/* ===== Responsivo ===== */
@media (max-width: 480px) {
  .panel { padding: 32px 24px; border-radius: 24px; }
  .btn { height: 52px; font-size: 15px; }
  .brand__logo { width: 56px; height: 56px; font-size: 24px; }
  .brand__title { font-size: 24px; }
}

/* ===== Animaciones respetuosas ===== */
@media (prefers-reduced-motion: no-preference) {
  .panel {
    animation: fadeUp .5s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
  }
}