body { margin: 0; font-family: 'Segoe UI', sans-serif; background: #004d55; color: #fff; }
header { display: flex; justify-content: space-between; align-items: center; padding: 20px 8%; border-bottom: 1px solid #006670; }
.logo { font-size: 24px; font-weight: bold; }
nav a { color: #fff; margin: 0 15px; text-decoration: none; font-size: 15px; }
.auth-btns a { padding: 8px 20px; border-radius: 5px; text-decoration: none; font-size: 14px; }
.signup { background: #007bff; }

.hero-container { display: flex; justify-content: space-between; align-items: center; padding: 80px 8%; }
.content { max-width: 50%; }
h1 { font-size: 48px; line-height: 1.2; }

.shorten-box { background: #fff; color: #333; padding: 30px; border-radius: 8px; width: 380px; box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.form-group input { width: 100%; padding: 12px; margin: 10px 0; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; }
.btn-shorten { width: 100%; background: #008060; color: #fff; border: none; padding: 15px; cursor: pointer; font-weight: bold; border-radius: 4px; }

footer { text-align: center; padding: 40px; font-size: 14px; border-top: 1px solid #006670; }