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toastOut{0%{opacity:1}to{opacity:0;transform:translateY(-10px)}}.tool-guide-scroll{display:flex;align-items:center;gap:8px;padding:4px 6px}.tool-guide-badge{background:#38bdf833;color:var(--accent-cyan);border:1px solid var(--accent-cyan);font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;white-space:nowrap}.palette-hint-text.highlight{color:#fef08a;font-weight:600}@media (max-width: 768px){#top-bar{flex-direction:column;height:auto;padding:6px 10px 8px;gap:6px}.top-nav-row{width:100%}.top-nav-primary{display:flex;align-items:center;justify-content:space-between;width:100%;gap:6px}.top-nav-left{gap:6px;flex-shrink:0}.logo-icon{font-size:18px}.logo-title{font-size:13px}.logo-subtitle{display:none}.top-nav-center{display:flex;align-items:center;gap:4px;overflow-x:auto;flex:1;min-width:0;justify-content:flex-end;scrollbar-width:none;-webkit-overflow-scrolling:touch}.top-nav-center::-webkit-scrollbar{display:none}.top-nav-secondary{display:flex;align-items:center;width:100%;border-top:1px solid rgba(255,255,255,.08);padding-top:5px}.top-nav-right{display:flex;align-items:center;justify-content:space-between;width:100%;gap:6px}.nav-btn{padding:4px 7px;font-size:11px;gap:3px;border-radius:6px;flex-shrink:0}.icon-btn{padding:4px 8px;font-size:11px;border-radius:6px;gap:3px;flex:1;justify-content:center}.icon-btn.lang-btn{flex:1.3;font-weight:700}.icon-btn.sound-btn{flex:.6}.periodic-modal-body{flex-direction:column;overflow-y:auto}.element-detail-pane{width:100%;border-left:none;border-top:1px solid var(--border-color)}#inspector-container{top:8px;bottom:auto;right:8px;left:auto;width:min(300px,calc(100vw - 16px));pointer-events:none}.tutorial-overlay{top:8px;width:95%;max-width:480px}.tutorial-card{padding:12px 14px;gap:8px}.tutorial-title{font-size:13px}.tutorial-desc{font-size:12px}.tutorial-task-badge{font-size:11px;padding:6px 10px}}@media (max-width: 480px){#top-bar{padding:5px 6px 6px;gap:4px}.logo-title{font-size:12px}.top-nav-center{gap:3px}.nav-btn{padding:3px 5px;font-size:10px;gap:2px}.top-nav-secondary{padding-top:4px}.top-nav-right{gap:4px}.icon-btn{padding:3px 4px;font-size:10px;gap:2px}.tool-btn{padding:5px 8px;font-size:11px}}.nav-btn.tutorial-nav-btn{background:linear-gradient(135deg,#10b98133,#06b6d433);border-color:#10b981;color:#a7f3d0}.tutorial-overlay{position:absolute;top:16px;left:50%;transform:translate(-50%);width:90%;max-width:540px;z-index:80;pointer-events:auto;transition:opacity .3s ease,transform .3s ease}.tutorial-overlay.hidden{opacity:0;pointer-events:none;transform:translate(-50%,-20px)}.tutorial-overlay.visible{opacity:1;transform:translate(-50%);animation:slideDown .3s ease-out}.tutorial-card{background:#0f172af0;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1.5px solid var(--accent-cyan);border-radius:14px;padding:16px 20px;box-shadow:0 12px 36px #0009,0 0 20px #38bdf840;display:flex;flex-direction:column;gap:10px}.tutorial-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.tutorial-step-tag{background:#38bdf82e;color:var(--accent-cyan);border:1px solid var(--accent-cyan);font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;white-space:nowrap}.tutorial-title{font-size:15px;font-weight:700;color:var(--text-main);flex:1}.tutorial-close-btn{background:transparent;border:none;color:var(--text-sub);font-size:16px;cursor:pointer;padding:4px 8px;border-radius:6px;transition:all .2s}.tutorial-close-btn:hover{background:#ffffff1a;color:var(--text-main)}.tutorial-progress-bar{width:100%;height:4px;background:#ffffff1a;border-radius:2px;overflow:hidden}.tutorial-progress-fill{height:100%;background:linear-gradient(90deg,#10B981,var(--accent-cyan));transition:width .3s ease}.tutorial-body{display:flex;flex-direction:column;gap:8px}.tutorial-desc{font-size:13px;color:var(--text-main);line-height:1.5}.tutorial-task-badge{display:flex;align-items:flex-start;gap:8px;background:#eab30826;border:1px solid rgba(234,179,8,.6);border-radius:8px;padding:8px 12px;font-size:12px;color:#fef08a;line-height:1.4}.tutorial-footer{display:flex;align-items:center;gap:8px;margin-top:4px}.footer-spacer{flex:1}.tutorial-btn{padding:6px 14px;border-radius:8px;font-size:12px;font-weight:700;cursor:pointer;transition:all .2s;border:1px solid transparent}.tutorial-btn.primary{background:var(--accent-cyan);color:#0f172a;border-color:var(--accent-cyan)}.tutorial-btn.primary:hover{box-shadow:0 0 12px #38bdf880;transform:translateY(-1px)}.tutorial-btn.secondary{background:#ffffff14;color:var(--text-main);border-color:var(--border-color)}.tutorial-btn.secondary:hover{background:#ffffff26}.tutorial-btn.pulse{animation:pulseButton 1.5s infinite}.tutorial-highlight{position:relative;z-index:30;animation:pulseGlow 1.5s infinite alternate!important;border-color:#38bdf8!important}@keyframes pulseGlow{0%{box-shadow:0 0 0 2px #38bdf866,0 0 10px #38bdf866;transform:scale(1)}to{box-shadow:0 0 0 5px #38bdf8e6,0 0 20px #38bdf8cc;transform:scale(1.06)}}@keyframes pulseButton{0%,to{transform:scale(1);box-shadow:0 0 #38bdf8b3}50%{transform:scale(1.04);box-shadow:0 0 16px 4px #38bdf8cc}}@keyframes slideDown{0%{opacity:0;transform:translate(-50%,-20px)}to{opacity:1;transform:translate(-50%)}}