*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#f4f6f9;--bg-secondary:#fff;--bg-tertiary:#eef2f7;--bg-surface:#fff;--text-primary:#0f172a;--text-secondary:#64748b;--accent:#0284c7;--accent-dim:#0369a1;--danger:#dc2626;--border:#e2e8f0;--radius:12px;--shadow:0 1px 3px #0f172a14, 0 4px 12px #0f172a0f}html,body,#root{height:100%;overflow:hidden}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.5}.app{height:100dvh;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);flex-direction:row;display:flex}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;width:220px;padding:20px 14px 16px;display:flex;overflow-y:auto;box-shadow:1px 0 6px 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a{color:var(--text-secondary);font-size:.75rem;font-weight:600;text-decoration:none;transition:color .15s}.sidebar-footer a:active{color:var(--accent)}.lang-switcher{z-index:35;position:fixed;top:10px;right:12px}.lang-switcher select{appearance:none;letter-spacing:.04em;color:var(--text-primary);border:1px solid var(--border);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffeb url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right 7px center no-repeat;border-radius:8px;padding:5px 22px 5px 8px;font-family:inherit;font-size:.75rem;font-weight:600;transition:border-color .15s;box-shadow:0 1px 4px #0f172a14}.lang-switcher 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env(safe-area-inset-bottom));background:var(--bg-secondary);max-height:none;box-shadow:none;-webkit-overflow-scrolling:touch;border-bottom:none;flex-direction:column;display:flex;position:fixed;inset:0;overflow:hidden}.sidebar-mobile-scroll{-webkit-overflow-scrolling:touch;flex:1;min-height:0;overflow-y:auto}.sidebar.mobile-open>.sidebar-footer{flex-shrink:0;margin-top:0;display:flex}.sidebar-drawer-backdrop{z-index:39;background:#0f172a40;display:none;position:fixed;inset:0}.sidebar-drawer-backdrop.visible{display:block}.app-body{flex-direction:column;flex:1;min-height:0}.canvas-wrapper{flex:1;min-height:0}.settings-panel{z-index:50;border-left:none;border-top:1px solid var(--border);-webkit-overflow-scrolling:touch;touch-action:pan-y;border-radius:16px 16px 0 0;width:100%;max-height:55vh;padding:8px 20px 20px;animation:.25s ease-out sheet-slide-up;position:fixed;bottom:0;left:0;right:0;overflow-y:auto;box-shadow:0 -4px 24px #0f172a1f}@keyframes sheet-slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.settings-sheet-backdrop{z-index:49;background:#0f172a33;animation:.2s ease-out sheet-fade-in;display:block;position:fixed;inset:0}@keyframes sheet-fade-in{0%{opacity:0}to{opacity:1}}.settings-sheet-handle{justify-content:center;padding:6px 0 10px;display:flex}.settings-sheet-handle:after{content:"";background:var(--border);border-radius:2px;width:36px;height:4px}.sidebar-btn{min-height:44px;padding:10px 12px}.legend-stack{max-width:min(260px,55vw);bottom:8px;right:8px}.autoplace-float{width:min(380px,100vw - 24px);max-height:calc(100vh - 80px);padding:14px 16px;top:8px;overflow-y:auto}.calibration-hint{max-width:min(380px,100vw - 24px);padding:10px 16px;font-size:.875rem;top:8px}.empty-state-heading{font-size:1.15rem}.empty-state-hint,.step{font-size:.95rem}.step-num{width:26px;height:26px;font-size:.85rem}.btn-primary,.btn-secondary{min-height:44px;padding:12px 20px}.calibration-modal-input{font-size:16px}.freq-btn{min-height:40px;padding:8px}.delete-btn,.toggle-btn{min-height:40px;padding:10px}.settings-sheet-close{cursor:pointer;width:32px;height:32px;color:var(--text-secondary);background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;margin-bottom:4px;margin-left:auto;display:flex}.lang-switcher{top:max(6px, env(safe-area-inset-top));right:max(54px, calc(env(safe-area-inset-right) + 42px));z-index:45}}