:root {
  --primary: <?= htmlspecialchars($tema['color_primario']) ?>;
  --secondary: <?= htmlspecialchars($tema['color_secundario']) ?>;
}
body {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  min-height: 100vh;
  margin: 0;
}
.app-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100vw;
}
.login-card {
  background: #fff;
  border-radius: 1.3rem;
  box-shadow: 0 8px 32px 0 rgba(16, 40, 80, 0.12);
  max-width: 370px;
  width: 100%;
  padding: 2.5rem 2rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  animation: fadeIn .8s;
}
@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateY(40px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
.login-logo {
  width: 110px;
  height: auto;
  margin: 0 auto 1rem auto;
  display: block;
}
.login-title {
  text-align: center;
  color: #0c0e14;
  font-size: 1.39rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: .03em;
}
.login-form-group {
  margin-bottom: 1.35rem;
  display: flex;
  flex-direction: column;
}
.login-form-group label {
  font-weight: 600;
  color: #0c0e14;
  margin-bottom: .5rem;
  letter-spacing: .01em;
}
.login-form-group input {
  padding: .9rem .85rem;
  border-radius: .8rem;
  border: 1.5px solid #e0e7ee;
  background: #f8f8fa;
  font-size: 1rem;
  transition: border-color .18s;
}
.login-form-group input:focus {
  border-color: var(--primary);
  outline: none;
}
.login-btn {
  width: 100%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  padding: 1rem 0;
  border:1px solid var(--primary);
  border-radius: 0.8rem;
  font-size: 1.09rem;
  cursor: pointer;
  margin-top: .6rem;
  letter-spacing: .03em;
  transition: background .18s;
}
.login-btn:hover {
  background:var(--bg,#f3f3f6);
  border:1px solid var(--primary);
  color:var(--primary);
  filter: brightness(.95);
}
.login-error {
  background: #ffeaea;
  color: #b03a3a;
  border: 1px solid #e74c3c;
  border-radius: .7rem;
  margin-top: 1rem;
  margin-bottom: .3rem;
  padding: .95rem 1rem;
  text-align: center;
  font-weight: 500;
}
@media (max-width: 480px) {
  .login-card {
    padding: 1.4rem .7rem 1rem .7rem;
  }
  .login-title {
    font-size: 1.08rem;
  }
}