.back-button{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--back-button-bg, linear-gradient(135deg, #667eea 0%, #764ba2 100%));color:#fff;border:none;border-radius:8px;font-size:1.2em;text-decoration:none;cursor:pointer;transition:all .2s ease;flex-shrink:0}.back-button:hover{transform:translateY(-2px);box-shadow:0 4px 12px var(--back-button-shadow, rgba(102, 126, 234, .4))}@media (max-width: 600px){.back-button{width:28px;height:28px;font-size:.9em;border-radius:6px}}.help-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:#667eea;color:#fff;border:none;border-radius:8px;font-size:1.2em;cursor:pointer;transition:all .2s ease;flex-shrink:0}.help-button:hover{background:#764ba2;transform:translateY(-2px)}@media (max-width: 600px){.help-button{width:28px;height:28px;font-size:.9em;border-radius:6px}}.help-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;padding:20px}.help-modal{width:100%;max-width:480px;max-height:80vh;background:white;border-radius:16px;box-shadow:0 15px 50px #0000004d;display:flex;flex-direction:column;overflow:hidden}.help-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:2px solid #f0f0f0}.help-modal-title{font-size:1.05em;font-weight:700;color:#333}.help-modal-close{background:none;border:none;font-size:1.4em;line-height:1;color:#999;cursor:pointer;padding:4px}.help-modal-close:hover{color:#333}.help-modal-body{overflow-y:auto;padding:20px;color:#333;font-size:.9em;line-height:1.6}.help-modal-body p{margin:0 0 12px}.help-modal-body h4{margin:20px 0 6px;padding-bottom:4px;border-bottom:2px solid #f0f0f0;color:#667eea;font-size:1.05em}.help-modal-body h4:first-child{margin-top:0}.help-modal-body ol{margin:0 0 12px;padding-left:1.5em}.help-modal-body img{display:block;max-width:min(100%,300px);margin:8px auto 12px;border:1px solid #e0e0e0;border-radius:8px}.help-modal-body .help-section-note{margin-bottom:8px;font-size:.95em}.help-modal-body dl{margin:0 0 16px}.help-modal-body dt{margin-top:10px;font-weight:700}.help-modal-body dd{margin:2px 0 0;color:#555}.help-modal-body a{color:#667eea}.help-modal-body .help-warning{color:#d32f2f}.help-modal-body details{margin:8px 0 12px;padding:8px 12px;border:1px solid #e0e0e0;border-radius:8px}.help-modal-body summary{cursor:pointer;font-weight:700;color:#667eea}