@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&display=swap');

:root {
  --bg-page:        #F5F5F5;  /* fondo general claro */
  --card-bg:        #FFFFFF;  /* fondo de la tarjeta */
  --text-dark:      #212121;  /* texto principal */
  --text-light:     #757575;  /* texto secundario */
  --border-gray:    #E0E0E0;  /* bordes y sombras suaves */
  --accent-yellow:  #FFC100;  /* Amarillo Caterpillar */
  --error-red:      #FF6B6B;
  --success-green:  #2E7D32;
}

/* Reset y soporte [hidden] */
[hidden] { display: none !important; }
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Montserrat', sans-serif;
  background: var(--bg-page);
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; color: var(--text-dark);
  overflow: hidden;
}

/* Contenedor */
.login-container {
  width: 100%; max-width: 500px; padding: 1rem;
}

/* Tarjeta de formulario */
.login-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  transition: opacity .3s;
}

/* Logo y títulos */
.login-logo-wrapper {
  display: flex; justify-content: center; margin-bottom: 1.5rem;
}
.login-logo {
  height: auto; width: 160px; /* mantiene proporción */
}
.login-title {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-dark);
  margin-bottom: .6rem;
}
.login-tagline {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

/* Campos */
.field-group {
  position: relative; margin-bottom: 1.2rem;
}
.field-group label {
  position: absolute; top: 50%; left: 1rem;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1rem;
}
.field-group input {
  width: 100%;
  padding: .85rem 1rem .85rem 3rem;
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  font-size: 1rem; font-weight: 500;
  background: #FFF;
  color: var(--text-dark);
  transition: box-shadow .2s, border-color .2s;
}
.field-group input:focus {
  outline: none;
  border-color: var(--accent-yellow);
  box-shadow: 0 0 0 3px rgba(255,193,0,0.3);
}
.field-group input::placeholder {
  color: #AAA;
}

/* Spinner */
.tiny-spinner {
  display: none;
  width: 1.2rem; height: 1.2rem;
  border: 2px solid var(--text-light);
  border-top: 2px solid var(--accent-yellow);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  margin-right: .6rem;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Botón */
.btn-primary {
  width: 100%; padding: .85rem 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent-yellow);
  color: var(--text-dark);
  border: none; border-radius: 50px;
  font-weight: 700; font-size: 1rem; text-transform: uppercase;
  letter-spacing: .5px; gap: .6rem; cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn-primary:hover {
  background: #E6AD00;
  transform: translateY(-2px);
}

/* Overlay de progreso */
.progress-overlay {
  position: fixed; top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
}
.progress-overlay.showing .progress-list {
  max-height: 800px;
}

/* Lista de fases */
.progress-list {
  list-style: none; padding: 0; margin: 0;
  width: 90%; max-width: 320px;
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease;
}
.progress-list li {
  opacity: 0; display: flex;
  align-items: center; justify-content: center;
  gap: .5rem; margin-bottom: 1rem;
  font-size: .95rem; font-weight: 600;
  background: #FFF; color: var(--text-dark);
  padding: .9rem; border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: opacity .3s, background .3s, color .3s;
}
.progress-list li.visible {
  opacity: 1;
}
.progress-list li.visible i {
  color: var(--accent-yellow);
}
.progress-list li.visible.completed {
  background: var(--success-green);
  color: #FFF;
}
.progress-list li.visible.completed i {
  color: #FFF;
}

/* Tarjeta final */
.progress-list li.final {
  flex-direction: column; align-items: center; gap: .5rem;
  font-size: 1rem; font-weight: 700;
  margin-top: 1rem; opacity: 1 !important;
  background: var(--accent-yellow); color: var(--text-dark);
  padding: 1.2rem; border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.progress-list li.final i {
  font-size: 2.5rem !important;
}

/* Error */
.login-error {
  color: var(--error-red);
  text-align: center; font-size: .9rem;
  margin-top: .6rem; font-weight: 500;
}

/* Footer */
.login-footer {
  text-align: center; margin-top: 1.6rem;
}
.login-footer small {
  color: var(--text-light); font-size: .75rem;
}

/* Responsive */
@media(max-width: 400px) {
  .login-card { padding: 1.5rem 1rem; }
  .field-group input { padding: .65rem .9rem .65rem 2.6rem; }
  .progress-list li { font-size: .85rem; margin-bottom: .75rem; }
}