:root {
  --primary-gradient: linear-gradient(45deg, #2193b0, #6dd5ed);
  --secondary-gradient: linear-gradient(45deg, #4a90e2, #67b26f);
  --primary-color: #2193b0;
  --secondary-color: #4a90e2;
  --success-color: #67b26f;
  --error-color: #e74c3c;
  --text-color: #2c3e50;
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --border-color: #e1e8ed;
  --shadow-color: rgba(0, 0, 0, 0.1);
  
  /* Dark theme variables */
  --dark-bg: #1a1a1a;
  --dark-card-bg: #2d3436;
  --dark-text: #f5f6fa;
  --dark-border: #636e72;
  --dark-gradient: linear-gradient(45deg, #232526, #414345);
}

[data-theme="dark"] {
  --bg-color: var(--dark-bg);
  --card-bg: var(--dark-card-bg);
  --text-color: var(--dark-text);
  --border-color: var(--dark-border);
  --primary-gradient: var(--dark-gradient);
}

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

body {
  background: var(--bg-color);
  color: var(--text-color);
  transition: all 0.3s ease;
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.header {
  text-align: center;
  padding: 3rem 0;
  background: var(--primary-gradient);
  margin: -20px -20px 30px -20px;
  color: white;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" fill-opacity="1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
  background-size: cover;
  opacity: 0.1;
  z-index: 0;
}

.header h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.notification-area {
  background: rgba(255,255,255,0.95);
  border-radius: 8px;
  padding: 15px;
  margin: 20px auto;
  max-width: 600px;
  box-shadow: 0 4px 6px var(--shadow-color);
  display: none;
}

.notification-area.success {
  border-left: 4px solid var(--success-color);
}

.notification-area.error {
  border-left: 4px solid var(--error-color);
}

.card {
  background: var(--card-bg);
  border-radius: 15px;
  box-shadow: 0 10px 20px var(--shadow-color);
  padding: 2rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
}

.ip-display {
  font-size: 1.2rem;
  margin: 1.5rem 0;
  text-align: center;
  padding: 15px;
  background: rgba(74, 144, 226, 0.1);
  border-radius: 10px;
  border: 1px solid rgba(74, 144, 226, 0.2);
}

.ip-address {
  color: var(--primary-color);
  font-weight: 600;
  padding: 0.2em 0.5em;
  background: rgba(74, 144, 226, 0.1);
  border-radius: 4px;
}

.captcha-container {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
  padding: 20px;
  background: rgba(255,255,255,0.8);
  border-radius: 10px;
  box-shadow: 0 4px 6px var(--shadow-color);
}

.info-section {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.info-item {
  display: flex;
  align-items: flex-start;
  padding: 1.5rem;
  background: rgba(255,255,255,0.8);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.info-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.info-item i {
  color: var(--primary-color);
  margin-right: 1rem;
  font-size: 1.5rem;
  background: rgba(74, 144, 226, 0.1);
  padding: 10px;
  border-radius: 50%;
}

.theme-switch {
  position: fixed;
  top: 5px;
  right: 20px;
  background: var(--secondary-gradient);
  border: none;
  color: white;
  padding: 0px 12px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
  box-shadow: 0 4px 6px var(--shadow-color);
  z-index: 1000;
}

.theme-switch:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px var(--shadow-color);
}

.footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-color);
  opacity: 0.8;
  margin-top: 3rem;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .info-section {
    grid-template-columns: 1fr;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.card, .info-item, .notification-area {
  animation: fadeIn 0.5s ease forwards;
}