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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

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

.form-box {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

p.lead {
  color: #666;
  text-align: center;
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-weight: 500;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: #667eea;
}

button {
  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: transform 0.2s, box-shadow 0.2s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

button:active {
  transform: translateY(0);
}

.error {
  background: #fee;
  color: #c33;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  border-left: 4px solid #c33;
}

.success {
  background: #efe;
  color: #3c3;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  border-left: 4px solid #3c3;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

header h1 {
  color: white;
  font-size: 28px;
}

header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
}

main {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.panel {
  margin-bottom: 30px;
}

.panel:last-child {
  margin-bottom: 0;
}

.panel h2 {
  color: #333;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #f0f0f0;
}

.client-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 8px;
  margin-bottom: 10px;
}

.client-item span {
  font-weight: 500;
  color: #333;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  background: #667eea;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
  transition: background 0.3s;
}

.btn:hover {
  background: #5a6fd6;
}

.vpn-selector {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.vpn-btn {
  flex: 1;
  min-width: 250px;
  padding: 30px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 12px;
  color: white;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
}

.vpn-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.vpn-btn .vpn-icon {
  font-size: 48px;
  margin-bottom: 15px;
  display: block;
}

.vpn-btn h3 {
  margin: 0 0 10px 0;
  font-size: 20px;
}

.vpn-btn p {
  margin: 0;
  font-size: 14px;
  opacity: 0.9;
}