:root {
  --primary: #00E0A4;
  --secondary: #6C63FF;
  --bg-dark: #0B0E1D;
  --bg-light: #151A3D;
  --glass: rgba(255, 255, 255, .08);
  --border: rgba(255, 255, 255, .15);
  --text: #fff;
  --muted: #c5c8ff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  position: fixed;
  inset: 0;
  background: #2C3E50;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text);
}

.container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: row;
  width: 700px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 22px;
  backdrop-filter: blur(14px);
  overflow: hidden;
}

.welcome {
  flex: 1;
  padding: 22px;
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 224, 164, .18), rgba(108, 99, 255, .18));
  border-right: 1px solid var(--border);
}

.welcome h2 {
  font-size: 1.3rem;
  margin: 10px 0;
}

.welcome p {
  color: var(--muted);
  margin-bottom: 15px;
}

.login-btn {
  background: var(--primary);
  color: #000;
  padding: 10px 26px;
  border-radius: 30px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  transition: .3s;
}

.login-btn:hover {
  filter: brightness(1.1);
}

.register-form {
  flex: 1;
  padding: 30px;
}

.register-form h2 {
  font-size: 1.2rem;
  margin-bottom: 15px;
}

.input-group {
  margin-bottom: 12px;
  position: relative;
}

.input-group label {
  font-size: 13px;
  color: var(--muted);
}

.input-group i {
  position: absolute;
  top: 36px;
  left: 12px;
  color: var(--muted);
  font-size: 14px;
}

.input-group input {
  width: 100%;
  padding: 10px 10px 10px 36px;
  border-radius: 16px;
  outline: none;
  font-size: 13px;
  background: rgba(0, 0, 0, .35);
  border: 1px solid var(--border);
  color: #eee;
}

.input-group input:focus {
  border-color: #01d676;
  box-shadow: 0 0 5px #01d676;
}

.register-btn {
  width: 100%;
  margin-top: 8px;
  padding: 10px;
  border: none;
  border-radius: 30px;
  background: linear-gradient(135deg, var(--primary), #1affc6);
  color: #000;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
  transition: .3s;
}

.register-btn i {
  font-size: 14px;
}

.register-btn:hover {
  filter: brightness(1.1);
}

.captcha-container {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}

.alert {
  padding: 12px;
  border-radius: 10px;
  font-size: 12px;
  margin-bottom: 15px;
  text-align: center;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
    width: 90%;
  }

  .welcome {
    padding: 18px;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .register-form {
    padding: 10px;
  }

  .welcome img {
    display: none;
  }
}