* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        body { background-color: #f8f9fa; color: #333; line-height: 1.6; scroll-behavior: smooth; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 15px; }
        
        /* Header & Navigation */
        header { background: linear-gradient(to right, #1a6db5, #0b4d8c); color: white; padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
        .header-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,0.1); }
        .header-bottom { padding-top: 15px; display: flex; justify-content: space-between; align-items: center; }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { color: white; text-decoration: none; font-weight: 500; }
        .user-actions a { padding: 8px 15px; border-radius: 5px; text-decoration: none; font-size: 14px; margin-left: 10px; }
        .login-btn { border: 1px solid white; color: white; }
        .register-btn { background: #ffcc00; color: #0b4d8c; }

        /* Appointment Section */
        .appointment-section { padding: 60px 0; background: #eef2f7; }
        .appointment-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: flex-start; }
        .form-card { background: white; padding: 30px; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
        .form-card h2 { color: #1a6db5; margin-bottom: 20px; text-align: center; }
        .form-group { margin-bottom: 15px; }
        .form-group label { display: block; margin-bottom: 5px; font-weight: 600; }
        .form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 5px; outline: none; }

        /* Payment UI */
        .payment-methods { display: flex; gap: 10px; margin-top: 10px; }
        .pay-option { flex: 1; border: 2px solid #ddd; padding: 10px; border-radius: 8px; text-align: center; cursor: pointer; transition: 0.3s; }
        .pay-option i { display: block; font-size: 20px; margin-bottom: 5px; }
        .pay-option.active-bkash { border-color: #e2136e; background: #fff0f6; color: #e2136e; }
        .pay-option.active-cash { border-color: #28a745; background: #f0fff4; color: #28a745; }
        .hidden-radio { display: none; }
        #bkashDetails { display: none; background: #fff0f6; padding: 10px; border-radius: 5px; margin-top: 10px; border-left: 4px solid #e2136e; font-size: 14px; }

        .submit-btn { background: #28a745; color: white; border: none; width: 100%; padding: 15px; border-radius: 5px; font-size: 18px; cursor: pointer; font-weight: bold; margin-top: 20px; }
        .submit-btn:hover { background: #218838; }

        /* Doctors Grid */
        .doctors-section { padding: 60px 0; }
        .section-title { text-align: center; margin-bottom: 40px; color: #1a6db5; position: relative; padding-bottom: 10px;}
        .section-title::after { content: ""; position: absolute; width: 60px; height: 3px; background: #ffcc00; bottom: 0; left: 50%; transform: translateX(-50%); }
        .doctors-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 25px; }
        .doctor-card { background: white; border-radius: 10px; overflow: hidden; box-shadow: 0 5px 15px rgba(0,0,0,0.1); text-align: center; }
        .doctor-image img { width: 100%; height: 220px; object-fit: cover; }
        .doctor-info { padding: 20px; }

        footer { background: #0b4d8c; color: white; padding: 40px 0 20px; margin-top: 50px; }
        @media (max-width: 768px) { .appointment-wrapper { grid-template-columns: 1fr; } }