body {
  font-family: 'Inter', Arial, sans-serif;
  margin: 0;
  background: linear-gradient(135deg,#0f172a,#1e293b,#020617);
  color: #3580e3;
}

header {
  background: linear-gradient(90deg,#6366f1,#8b5cf6,#22d3ee);
  background-size: 200% 200%;
  animation: headerGradient 8s ease infinite;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  padding: 20px 0;
}

@keyframes headerGradient{
0%{background-position:0% 50%;}
50%{background-position:100% 50%;}
100%{background-position:0% 50%;}
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
}

.header-container h1 {
  color: #ffffff;
  font-size: 28px;
  margin: 0;
  letter-spacing:1px;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 10px;
}

header nav a {
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  padding:6px 10px;
  border-radius:6px;
  transition: all 0.3s ease;
}

header nav a:hover {
  background: rgba(255,255,255,0.15);
  color:#e0f2fe;
}

.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 30px;
  background: linear-gradient(145deg,#ffffff,#f1f5ff);
  border-radius: 16px;
  box-shadow: 
  0 20px 40px rgba(0,0,0,0.3),
  0 0 40px rgba(99,102,241,0.15);
}

h1, h2 {
  color: #4f46e5;
}

label {
  display: block;
  margin-top: 15px;
  font-weight:600;
}

input, select {
  width: 100%;
  padding: 12px;
  margin-top: 5px;
  border: 1px solid #dbeafe;
  border-radius: 10px;
  background:#f8fafc;
  transition: all .25s ease;
}

input:focus, select:focus{
  outline:none;
  border-color:#6366f1;
  box-shadow:0 0 0 3px rgba(99,102,241,.25);
}

button {
  margin-top: 20px;
  padding: 14px 28px;
  background: linear-gradient(90deg,#6366f1,#8b5cf6,#22d3ee);
  border:none;
  color:white;
  border-radius:12px;
  cursor:pointer;
  font-size:16px;
  font-weight:bold;
  transition: all .3s ease;
  box-shadow:0 8px 20px rgba(99,102,241,.4);
}

button:hover {
  transform: translateY(-2px);
  box-shadow:0 12px 30px rgba(99,102,241,.5);
}

#result {
  margin-top: 20px;
  padding: 18px;
  background: linear-gradient(135deg,#eef2ff,#e0f2fe);
  border-radius: 12px;
  color:#1e293b;
  font-weight:500;
  box-shadow:0 6px 18px rgba(0,0,0,.15);
}

footer {
  background: linear-gradient(90deg,#020617,#1e293b);
  color: #cbd5f5;
  padding: 40px 20px;
  margin-top: 60px;
  text-align: center;
  border-top:1px solid rgba(255,255,255,.08);
}

.footer-container {
  max-width: 1000px;
  margin: 0 auto;
  font-size: 14px;
  line-height: 1.6;
}

.footer-container p {
  margin: 5px 0;
  opacity: 0.9;
}

.seo-section {
  background: linear-gradient(145deg,#ffffff,#f1f5ff);
  border-radius: 16px;
  box-shadow: 
  0 10px 25px rgba(0,0,0,.2),
  0 0 25px rgba(99,102,241,.1);
  margin: 40px auto;
  padding: 30px;
  max-width: 800px;
  transition: all .35s ease;
}

.seo-section:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow:
  0 20px 45px rgba(0,0,0,.3),
  0 0 30px rgba(99,102,241,.25);
}

.seo-section h2 {
  color: #4f46e5;
  font-size: 22px;
  margin-bottom: 12px;
}

.seo-section p {
  color: #334155;
  font-size: 16px;
  line-height: 1.7;
}