:root{--bar-bg: rgba(31, 36, 48, .92);--bar-fg: #e8ecf4;--accent: #4c8dff;--btn-hover: rgba(255, 255, 255, .12);--btn-active: rgba(76, 141, 255, .3);--shadow: 0 6px 24px rgba(0, 0, 0, .28)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;height:100%;width:100%}html,body{overflow:hidden;overscroll-behavior:none;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,sans-serif;background:#f4f5f7}.board{display:block;position:fixed;top:0;right:0;bottom:0;left:0;width:100%;height:100%;touch-action:none;cursor:crosshair;background:#fff}#toolbar{position:fixed;left:50%;bottom:max(14px,env(safe-area-inset-bottom));transform:translate(-50%);display:flex;align-items:center;gap:6px;padding:8px 10px;background:var(--bar-bg);color:var(--bar-fg);border-radius:16px;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:10;max-width:calc(100vw - 16px);flex-wrap:wrap;justify-content:center;-webkit-user-select:none;user-select:none}.tbtn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;color:var(--bar-fg);width:42px;height:42px;border-radius:11px;display:grid;place-items:center;cursor:pointer;font-size:20px;line-height:1;transition:background .12s ease,transform .06s ease}.tbtn:hover{background:var(--btn-hover)}.tbtn:active{transform:scale(.92)}.tbtn.active{background:var(--btn-active);box-shadow:inset 0 0 0 1.5px var(--accent)}.tbtn svg{width:22px;height:22px;pointer-events:none}.divider{width:1px;height:28px;background:#ffffff29;margin:0 2px}.swatches{display:flex;gap:5px;align-items:center}.swatch{width:26px;height:26px;border-radius:50%;border:2px solid rgba(255,255,255,.55);cursor:pointer;padding:0;transition:transform .08s ease}.swatch:active{transform:scale(.88)}.swatch.active{transform:scale(1.18);border-color:#fff;box-shadow:0 0 0 2px var(--accent)}#customColor{width:30px;height:30px;padding:0;border:none;border-radius:50%;background:none;cursor:pointer;overflow:hidden}#customColor::-webkit-color-swatch-wrapper{padding:0}#customColor::-webkit-color-swatch{border:2px solid rgba(255,255,255,.55);border-radius:50%}.size-wrap{display:flex;align-items:center;gap:7px;padding:0 4px}#size{width:84px;height:4px;border-radius:4px;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:#ffffff4d}#size::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid #fff}#size::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid #fff}.size-dot{width:18px;height:18px;display:grid;place-items:center}.size-dot i{display:block;border-radius:50%;background:var(--bar-fg)}.zoom-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;color:var(--bar-fg);height:42px;min-width:48px;padding:0 8px;border-radius:11px;cursor:pointer;font-size:12px;font-variant-numeric:tabular-nums;transition:background .12s ease}.zoom-btn:hover{background:var(--btn-hover)}#textInput{position:fixed;z-index:20;border:1px dashed var(--accent);outline:none;background:#ffffff80;padding:2px 4px;margin:0;font-family:inherit;white-space:pre-wrap;overflow:hidden;resize:none;min-width:4px;min-height:1.4em;line-height:1.35}#boardMenu{position:fixed;left:max(12px,env(safe-area-inset-left));top:max(12px,env(safe-area-inset-top));z-index:15;-webkit-user-select:none;user-select:none}.board-current{display:flex;align-items:center;gap:6px;background:var(--bar-bg);color:var(--bar-fg);border:none;border-radius:12px;padding:8px 12px;cursor:pointer;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);font-size:13px;max-width:60vw}.board-name{max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.board-caret{font-size:10px;opacity:.7}.board-list{margin-top:6px;background:var(--bar-bg);color:var(--bar-fg);border-radius:12px;padding:6px;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);min-width:200px;max-height:60vh;overflow-y:auto}.board-item{display:flex;align-items:center;gap:2px;border-radius:8px;padding:2px}.board-item.active{background:var(--btn-active)}.board-item-name{flex:1;text-align:left;background:transparent;border:none;color:var(--bar-fg);padding:6px 8px;cursor:pointer;border-radius:6px;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.board-item-name:hover{background:var(--btn-hover)}.board-icon{background:transparent;border:none;color:var(--bar-fg);opacity:.7;cursor:pointer;width:26px;height:26px;border-radius:6px;font-size:12px}.board-icon:hover{background:var(--btn-hover);opacity:1}.board-new{width:100%;margin-top:4px;background:transparent;border:1px dashed rgba(255,255,255,.25);color:var(--bar-fg);padding:8px;border-radius:8px;cursor:pointer;font-size:13px}.board-new:hover{background:var(--btn-hover)}#shareButton{position:fixed;left:max(12px,env(safe-area-inset-left));top:calc(max(12px,env(safe-area-inset-top)) + 48px);z-index:15;display:flex;align-items:center;gap:6px;background:var(--accent);color:#fff;border:none;border-radius:12px;padding:8px 12px;cursor:pointer;box-shadow:var(--shadow);font-size:13px}#shareButton:hover{filter:brightness(1.08)}#collabBar{position:fixed;left:max(12px,env(safe-area-inset-left));top:max(12px,env(safe-area-inset-top));z-index:15;display:flex;align-items:center;gap:8px;background:var(--bar-bg);color:var(--bar-fg);border-radius:12px;padding:7px 10px;box-shadow:var(--shadow);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);font-size:13px;max-width:calc(100vw - 24px);flex-wrap:wrap}.collab-dot{width:8px;height:8px;border-radius:50%;background:#2ecc71;box-shadow:0 0 0 3px #2ecc7140}.collab-label{font-weight:600}.collab-avatars{display:flex;align-items:center;gap:3px}.collab-avatar{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:10px;color:#fff;border:1.5px solid rgba(255,255,255,.5)}.collab-count{opacity:.8;margin-left:4px}.collab-action{background:#ffffff1f;color:var(--bar-fg);border:none;border-radius:8px;padding:6px 10px;cursor:pointer;font-size:12px}.collab-action:hover{background:#fff3}.collab-action.ghost{background:transparent;border:1px solid rgba(255,255,255,.25)}.room-closed{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:grid;place-items:center;background:#f4f5f7eb;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.room-closed-card{background:var(--bar-bg);color:var(--bar-fg);padding:24px 28px;border-radius:16px;box-shadow:var(--shadow);text-align:center}.room-closed-card p{margin:0 0 16px;font-size:15px}.room-closed-card button{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 18px;cursor:pointer;font-size:14px}.collab-loading{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--bar-bg);color:var(--bar-fg);padding:10px 18px;border-radius:12px;box-shadow:var(--shadow);font-size:13px;z-index:40}.toast{position:fixed;left:50%;top:18px;transform:translate(-50%) translateY(-20px);background:#1f2430f2;color:#fff;padding:8px 16px;border-radius:999px;font-size:13px;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;z-index:30;box-shadow:var(--shadow)}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media (max-width: 560px){.tbtn{width:38px;height:38px;font-size:18px}#size{width:64px}.swatch{width:24px;height:24px}}