* { box-sizing: border-box; font-family: 'Segoe UI', sans-serif; margin: 0; padding: 0; }
body { background: #f4f4f9; display: flex; justify-content: center; align-items: center; height: 100vh; }
.card { background: white; padding: 30px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); width: 350px; border-top: 5px solid #e3000f; }
h1 { color: #e3000f; text-align: center; margin-bottom: 20px; font-size: 24px; }
input { width: 100%; padding: 12px; margin-bottom: 15px; border: 1px solid #ddd; border-radius: 6px; font-size: 16px; }
button { background: #e3000f; color: white; border: none; padding: 12px; border-radius: 6px; width: 100%; cursor: pointer; font-weight: bold; font-size: 16px; }
button:hover { background: #b3000c; }
#msg { color: red; text-align: center; margin-top: 10px; font-weight: bold; display: none; }
.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7); z-index: 1000; justify-content: center; align-items: center; }
.modal-content { background: white; padding: 30px; border-radius: 12px; width: 350px; text-align: center; border-top: 5px solid #28a745; }