:root{--primary-blue: #0d6efd;--light-blue: #e7f0ff;--background-color: #f8f9fa;--card-color: #ffffff;--text-color: #212529;--secondary-text-color: #6c757d;--border-color: #dee2e6;--shadow-color: rgba(0, 0, 0, .075)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--background-color);color:var(--text-color);margin:0;padding:2rem}.container{max-width:680px;margin:0 auto}.header{text-align:center;padding-bottom:2rem;margin-bottom:2rem}.header h1{font-size:2rem;font-weight:600;margin:0;color:var(--primary-blue)}.header p{font-size:1rem;color:var(--secondary-text-color);margin-top:.5rem}.event-card{background-color:var(--card-color);border:1px solid var(--border-color);border-radius:18px;padding:2rem;margin-bottom:2rem;box-shadow:0 4px 25px var(--shadow-color);transition:transform .2s ease-in-out}.event-card.is-full{background-color:#f8f9fa;opacity:.7;font-style:italic}.event-card h2{font-size:1.75rem;margin:0 0 .5rem}.event-card .event-description{font-size:1rem;color:var(--secondary-text-color);margin-bottom:1rem;font-style:italic}.event-card .event-details{font-size:1rem;color:var(--text-color);margin:.25rem 0;font-weight:500}.rsvp-button,.submit-button{background-color:var(--primary-blue);color:#fff;border:none;border-radius:8px;padding:12px 20px;font-size:1rem;font-weight:500;cursor:pointer;margin-top:1rem;transition:background-color .2s;width:100%}.rsvp-button:hover,.submit-button:hover{filter:brightness(110%)}.cancel-button{background-color:#6c757d}.rsvp-form{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border-color)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-input{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;box-sizing:border-box}.success-message,.error-message{margin-top:1rem;padding:12px;border-radius:8px;text-align:center}.success-message{background-color:var(--light-blue);color:var(--primary-blue);font-weight:500}.error-message{background-color:#fdeaea;color:#b22222}