* {
  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;
  flex-direction: column;
  padding: 20px;
}

.header {
  background: white;
  padding: 15px 30px;
  border-radius: 10px;
  margin-bottom: 30px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: color 0.3s;
}

.header a:hover {
  color: #764ba2;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

.card {
  background: white;
  border-radius: 15px;
  padding: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1 {
  color: #333;
  font-size: 28px;
  margin-bottom: 10px;
  text-align: center;
}

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

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

label {
  display: block;
  color: #333;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

input {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 15px;
  transition: all 0.3s;
  font-family: inherit;
}

input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input::placeholder {
  color: #aaa;
}

select {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 15px;
  transition: all 0.3s;
  font-family: inherit;
  background-color: white;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 10px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.result {
  margin-top: 30px;
  padding: 20px;
  border-radius: 10px;
  display: none;
  animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.result.success {
  background: #d4edda;
  border: 2px solid #c3e6cb;
}

.result.error {
  background: #f8d7da;
  border: 2px solid #f5c6cb;
}

.result-title {
  font-weight: 700;
  margin-bottom: 10px;
  font-size: 16px;
}

.result.success .result-title {
  color: #155724;
}

.result.error .result-title {
  color: #721c24;
}

.result-content {
  color: #333;
  line-height: 1.6;
}

.info-box {
  background: #f8f9fa;
  padding: 15px;
  border-radius: 8px;
  margin-top: 20px;
  border-left: 4px solid #667eea;
}

.info-box p {
  color: #666;
  font-size: 13px;
  line-height: 1.6;
}

.info-box strong {
  color: #333;
}

@media (max-width: 640px) {
  .card {
    padding: 30px 20px;
  }

  h1 {
    font-size: 24px;
  }
}