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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.container {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.login-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 50px 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 10;
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo {
  text-align: center;
  margin-bottom: 20px;
}

.logo-icon {
  font-size: 60px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

h1 {
  text-align: center;
  color: #333;
  font-size: 32px;
  margin-bottom: 10px;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 30px;
  font-size: 14px;
}

.input-group {
  margin-bottom: 25px;
}

.input-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #555;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.icon {
  font-size: 18px;
}

input {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: white;
}

input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

input::placeholder {
  color: #aaa;
}

.error-message {
  color: #e74c3c;
  font-size: 14px;
  margin-bottom: 15px;
  text-align: center;
  min-height: 20px;
  font-weight: 500;
}

.login-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.arrow {
  font-size: 24px;
  transition: transform 0.3s ease;
}

.login-btn:hover .arrow {
  transform: translateX(5px);
}

.footer {
  margin-top: 25px;
  text-align: center;
}

.footer p {
  color: #666;
  font-size: 14px;
}

.footer a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.footer a:hover {
  color: #764ba2;
  text-decoration: underline;
}

/* Animowane kształty w tle */
.background-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  animation: float 20s infinite ease-in-out;
}

.shape1 {
  width: 300px;
  height: 300px;
  background: white;
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.shape2 {
  width: 200px;
  height: 200px;
  background: white;
  bottom: -50px;
  right: -50px;
  animation-delay: 7s;
}

.shape3 {
  width: 150px;
  height: 150px;
  background: white;
  top: 50%;
  right: 10%;
  animation-delay: 3s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

/* Responsywność */
@media (max-width: 480px) {
  .login-box {
    padding: 40px 25px;
  }

  h1 {
    font-size: 26px;
  }
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
  padding: 10px 20px;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  color: #666 !important;
  font-size: 13px;
  text-decoration: none;
  transition: all 0.3s ease;
}
.back-home-link:hover {
  background: rgba(102, 126, 234, 0.05);
  border-color: #667eea;
  color: #667eea !important;
  text-decoration: none !important;
}