/* 1. Global Reset */
* { box-sizing: border-box; }

body { 
    font-family: 'Plus Jakarta Sans', 'Segoe UI', sans-serif; 
    line-height: 1.6; 
    margin: 0; 
    padding: 0; 
    color: #1f2937;
    background-color: #f9fafb;
}

/* 2. Header & Mobile Menu */
header { background: #111827; padding: 15px; color: #fff; position: relative; }
.header-container { display: flex; justify-content: space-between; align-items: center; max-width: 800px; margin: 0 auto; }
.logo { font-weight: 800; font-size: 1.2rem; letter-spacing: -0.5px; }
.hamburger { display: none; background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; }

nav { display: block; }
nav ul { list-style: none; display: flex; gap: 25px; margin: 0; padding: 0; }
nav a { color: #d1d5db; text-decoration: none; font-weight: 600; font-size: 14px; transition: color 0.3s; }
nav a:hover { color: #ffffff; }

/* 3. Hero Section (Premium Layout) */
.hero { 
    text-align: center; 
    padding: 80px 20px; 
    background: linear-gradient(135deg, #111827, #1f2937); 
    color: #fff;
    border-bottom: 5px solid #0284c7;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 10px; letter-spacing: -1px; }
.hero p { color: #9ca3af; font-size: 1.1rem; max-width: 600px; margin: 0 auto 20px; }

/* 4. Content Sections */
.container, .content { width: 90%; max-width: 600px; margin: 40px auto; padding: 30px; background: #fff; border-radius: 12px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }

/* 5. Buttons */
.btn { 
    display: inline-block; padding: 16px 32px; 
    background: #0284c7; color: #fff; text-decoration: none; 
    border-radius: 8px; font-weight: 700; transition: background 0.3s;
}
.btn:hover { background: #0369a1; }

/* 6. Form Styling */
.reg-form { display: flex; flex-direction: column; gap: 15px; }
.reg-form input, .reg-form select { width: 100%; padding: 14px; border: 1px solid #e5e7eb; border-radius: 8px; font-size: 16px; }
.row { display: flex; gap: 10px; }
.row input { flex: 1; }
.radio-group { display: flex; flex-direction: column; gap: 8px; padding: 5px 0; }
.radio-options { display: flex; gap: 20px; }
.radio-option { display: flex; align-items: center; gap: 5px; font-size: 14px; }

/* 7. Footer */
footer { text-align: center; padding: 30px; font-size: 0.85rem; color: #6b7280; }

/* 8. Mobile Responsiveness */
@media (max-width: 600px) {
    .hamburger { display: block; }
    nav { display: none; width: 100%; background: #1f2937; position: absolute; top: 60px; left: 0; padding: 20px; z-index: 100; }
    nav.active { display: block; }
    nav ul { flex-direction: column; align-items: center; gap: 20px; }
    .hero h1 { font-size: 2rem; }
}