body { 
  margin: 0; 
  padding: 0; 
  min-height: 100vh;
  background: linear-gradient(135deg, #0a0a2a, #1a1a4a, #0a0a2a);
  background-size: 400% 400%;
  animation: gradientBG 20s ease infinite;
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  color: #ffffff;
  overflow-x: hidden;
  position: relative;
}
@keyframes gradientBG {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 25%, rgba(0, 198, 255, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 85% 75%, rgba(0, 114, 255, 0.1) 0%, transparent 20%);
  z-index: -1;
}
.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 30px;
  display: flex;
  flex-direction: column;
  min-height: 90vh;
  width: auto;
}
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 0;
  margin-bottom: 40px;
  border-bottom: 1px solid rgba(100, 150, 255, 0.2);
}
.logo {
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(45deg, #00c6ff, #0072ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 10px rgba(0, 198, 255, 0.3);
  letter-spacing: 1px;
}
.logo span {
  font-size: 1.1rem;
  opacity: 0.8;
  font-weight: 300;
  letter-spacing: 0.5px;
}
.nav-links {
  display: flex;
  gap: 25px;
}
.nav-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 0px 20px;
  border-radius: 25px;
  font-size: 1.05rem;
  position: relative;
  overflow: hidden;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #00c6ff, #0072ff);
  transition: width 0.3s ease;
}
.nav-links a:hover {
  color: #ffffff;
  background: rgba(0, 198, 255, 0.1);
  transform: translateY(-2px);
}
.nav-links a:hover::after {
  width: 100%;
}
.main-content {
  display: flex;
  flex: 1;
  gap: 80px;
  align-items: center;
  justify-content: center;
  margin-bottom: 50px;
}
.left-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 30px;
  max-width: 600px;
}
.left-section h2 {
  font-size: 5.2rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(45deg, #ffffff, #a0d2ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}
.left-section p {
  font-size: 1.55rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 25px;
}
.features-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.features-list li {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 20px;
  font-size: 1.75rem;
  line-height: 1.6;
}

.features-list li::before {
  content: '✓';
  color: #00c6ff;
  font-weight: bold;
  font-size: 1.2rem;
  margin-top: 2px;
}
.login-container {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  border-radius: 20px;
  padding: 50px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(100, 150, 255, 0.2);
  position: relative;
  overflow: hidden;
}
.login-container::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, #00c6ff, #0072ff, #00c6ff);
  z-index: -1;
  border-radius: 22px;
  opacity: 0.3;
  animation: pulseBorder 3s infinite;
}
@keyframes pulseBorder {
  0% { opacity: 0.3; }
  50% { opacity: 0.6; }
  100% { opacity: 0.3; }
}
.login-header {
  text-align: center;
  margin-bottom: 40px;
}
.login-header h2 {
  font-size: 2rem;
  margin-bottom: 15px;
  background: linear-gradient(45deg, #00c6ff, #0072ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}
.login-header p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.5rem;
  font-weight: 300;
}
.form-group {
  margin-bottom: 30px;
  position: relative;
}
.form-group label {
  display: block;
  margin-bottom: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.7rem;
  letter-spacing: 0.5px;
}
.form-control {
  width: 100%;
  padding: 18px 20px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(100, 150, 255, 0.3);
  border-radius: 15px;
  color: white;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  outline: none;
  font-weight: 400;
  letter-spacing: 0.5px;
  width: 300px;
}
.form-control:focus {
  border-color: #00c6ff;
  box-shadow: 0 0 0 4px rgba(0, 198, 255, 0.2);
  background: rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}
.captcha-container {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-top: 5px;
}
.captcha-input {
  /*flex: 1;*/
  width: 120px;
}
.captcha-container img {
  cursor: pointer;
  border-radius: 8px;
  transition: transform 0.3s ease;
  border: 1px solid rgba(100, 150, 255, 0.3);
  background: rgba(0, 0, 0, 0.2);
  width: 120px;
  height: 40px;
}

.captcha-container img:hover {
  transform: scale(1.05);
  border-color: #00c6ff;
}
.login-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(45deg, #00c6ff, #0072ff);
  border: none;
  border-radius: 15px;
  color: white;
  font-size: 1.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: 0 6px 20px rgba(0, 114, 255, 0.4);
  margin-top: 10px;
  font-family: inherit;
}
.login-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 114, 255, 0.6);
}
.login-btn:active {
  transform: translateY(0);
}
.footer {
  text-align: center;
  padding: 30px 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  border-top: 1px solid rgba(100, 150, 255, 0.2);
  margin-top: auto;
  font-weight: 300;
}
@media (max-width: 1200px) {
  .main-content {
    flex-direction: column;
    align-items: center;
  }
  
  .left-section {
    max-width: 100%;
  }
  
  .login-container {
    max-width: 100%;
  }
  
  .header {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  
  .header {
    padding: 20px 0;
    margin-bottom: 30px;
  }
  
  .logo h1 {
    font-size: 2rem;
  }
  
  .logo span {
    font-size: 1rem;
  }
  
  .nav-links a {
    padding: 0px 15px;
    font-size: 0.95rem;
  }
  
  .login-container {
    padding: 40px 30px;
  }
  
  .login-header h2 {
    font-size: 1.6rem;
  }
  
  .form-control {
    padding: 16px 18px;
    font-size: 1.1rem;
  }
  
  .form-group label {
    font-size: 1.1rem;
  }
}
@media (max-width: 480px) {
  .login-container {
    padding: 30px 25px;
  }
  
  .login-header h2 {
    font-size: 1.5rem;
  }
  
  .login-btn {
    padding: 16px;
    font-size: 1.1rem;
  }
  
  .captcha-container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .captcha-container img {
    width: 100%;
    max-width: 120px;
    margin: 10px auto 0;
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-container {
  animation: fadeInUp 0.8s ease-out;
}

.form-control:focus {
  animation: pulseInput 2s infinite;
}
@keyframes pulseInput {
  0% { box-shadow: 0 0 0 0 rgba(0, 198, 255, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(0, 198, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 198, 255, 0); }
}