* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #0b1a2e;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
  overflow: hidden;
}

#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.login-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
  animation: fadeUp 0.6s ease-out;
}

.login-box {
  width: 100%;
  background: rgba(255, 255, 255, 0.97);
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo {
  max-width: 72px;
  margin-bottom: 1rem;
}

.login-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a1f36;
  margin-bottom: 0.3rem;
  letter-spacing: -0.3px;
}

.login-header .brand-name {
  color: #2563eb;
}

.login-header p {
  color: #6b7280;
  font-size: 0.88rem;
}

.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: #4b5563;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-control {
  border: 1.5px solid #e2e6ed;
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  font-size: 0.92rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-color: #f8f9fb;
}

.form-control:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  background-color: #fff;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1a4fd4);
  border: none;
  border-radius: 10px;
  padding: 0.72rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1740b0);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

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

.login-footer {
  text-align: center;
  margin-top: 1.5rem;
}

.login-footer p {
  color: #9ca3af;
  font-size: 0.75rem;
  margin: 0;
  line-height: 1.6;
}

.login-footer a {
  color: #6b7280;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

.login-footer a:hover {
  color: #2563eb;
}

.login-version {
  display: inline-block;
  font-size: 0.65rem;
  color: #b0b8c4;
  background: #f0f2f5;
  padding: 2px 10px;
  border-radius: 20px;
  margin-top: 0.6rem;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.alert-danger {
  border: none;
  border-radius: 8px;
  background-color: #fef2f2;
  color: #dc2626;
  border-left: 3px solid #dc2626;
  font-size: 0.82rem;
}

.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #e8ecf1;
}

.divider span {
  font-size: 0.7rem;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 480px) {
  .login-wrapper {
    max-width: 100%;
  }

  .login-box {
    border-radius: 12px;
  }

  .login-logo {
    max-width: 56px;
  }

  .login-header h3 {
    font-size: 1.25rem;
  }
}