<!-- ===================== style.css ===================== -->
body{margin:0;font-family:Segoe UI;background:#0b1220;color:#f1f5f9}
header{display:flex;justify-content:space-between;align-items:center;padding:20px 40px;background:#000000}header h1 {
  color: #ffffff;
}
nav a{color:#ffffff;margin-left:20px;text-decoration:none;position:relative}
nav a::after{content:"";position:absolute;width:0;height:2px;left:0;bottom:-5px;background:#22d3ee;transition:.3s}
nav a:hover::after{width:100%}
.hero{height:90vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:linear-gradient(135deg,#031727,#0f172a)}
.hero h2{font-size:3.5rem;color:#3dc3ef;animation:fadeDown 1.2s}
.hero p{animation:fadeUp 1.2s}
.btn{padding:12px 30px;background:#22d3ee;border:none;border-radius:30px;font-weight:bold;cursor:pointer;transition:.3s}
.btn:hover{transform:translateY(-5px);box-shadow:0 15px 30px rgba(34,211,238,.4)}
section{padding:80px 40px}
.boots{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}
<div class="boots">
.boots{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}
.boot-card{background:#527a82;padding:20px;border-radius:20px;text-align:center;transition:.4s}
.boot-card img{width:100%;border-radius:15px;transition:.4s}
.boot-card:hover{transform:translateY(-10px)}
.boot-card:hover img{transform:scale(1.1)}
table{width:80%;margin:auto;border-collapse:collapse}
th,td{border:1px solid #1e293b;padding:12px;text-align:center}
th{color:#22d3ee;background:#020617}
form{max-width:400px;margin:auto;background:#000000;padding:30px;border-radius:20px}
input{width:100%;padding:12px;margin:10px 0}
footer{text-align:center;background:#020617;padding:20px}
@keyframes fadeDown{from{opacity:0;transform:translateY(-40px)}to{opacity:1}}
@keyframes fadeUp{from{opacity:0;transform:translateY(40px)}to{opacity:1}}
.price {
  margin-top: 10px;
  font-size: 1.1rem;
  font-weight: bold;
  color: #22d3ee;
}
.boots-page {
  background: linear-gradient(135deg, #020617, #0b1220, #020617);
}
.size-page {
  background: linear-gradient(135deg, #7989d2, #4b9fd4, #000000);
}
.home-page {
  background: linear-gradient(135deg, #7989d2, #4b9fd4, #000000);
}
.about-page {
  background: linear-gradient(135deg, #7989d2, #4b9fd4, #000000);
}
.register-page {
  background: linear-gradient(135deg, #020617, #0f172a);
}

.register-section {
  max-width: 500px;
  margin: 100px auto;
  text-align: center;
}

.register-section h2 {
  font-size: 2.2rem;
  color: #22d3ee;
  margin-bottom: 10px;
}

.form-subtext {
  font-size: 0.95rem;
  color: #cbd5f5;
  margin-bottom: 30px;
}

form {
  background: #020617;
  padding: 35px;
  border-radius: 20px;
}

label {
  display: block;
  text-align: left;
  margin-top: 15px;
  margin-bottom: 5px;
  font-size: 0.9rem;
  color: #94a3b8;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: #0f172a;
  color: #f1f5f9;
}

input:focus {
  outline: 2px solid #22d3ee;
}