@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #0a0a0f;--surface: #14141f;--surface-2: #1e1e2e;--border: #2a2a3e;--text: #e8e8f0;--text-dim: #8888a0;--accent: #6c5ce7;--accent-hover: #7c6cf7;--accent-soft: rgba(108, 92, 231, .15);--danger: #e74c3c;--bubble-bg: #1a1a2e;--bubble-border: #3a3a5e;--radius: 16px;--radius-sm: 10px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;min-height:100dvh;-webkit-font-smoothing:antialiased;overflow:hidden;position:fixed;width:100%}.app{min-height:100vh;display:flex;justify-content:center;padding:20px;overflow:auto}.container{width:100%;max-width:560px;padding-top:40px}.title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:8px;background:linear-gradient(135deg,var(--accent),#a29bfe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{text-align:center;color:var(--text-dim);font-size:.95rem;margin-bottom:40px}.initial-input{display:flex;flex-direction:column;align-items:center;gap:20px}.initial-input .speech-bubble{width:100%}.speech-bubble{background:var(--bubble-bg);border:1px solid var(--bubble-border);border-radius:var(--radius);padding:24px;transition:border-color .2s}.speech-bubble:hover{border-color:var(--accent)}.input-bubble textarea{width:100%;background:transparent;border:none;color:var(--text);font-size:1.1rem;font-family:inherit;resize:none;outline:none;min-height:80px;line-height:1.6}.input-bubble textarea::placeholder{color:var(--text-dim)}.app-canvas{display:flex;flex-direction:column;height:100vh;height:100dvh;overflow:hidden;position:fixed;inset:0}.canvas-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;z-index:10}.title-small{font-size:1.1rem;font-weight:600;background:linear-gradient(135deg,var(--accent),#a29bfe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-actions{display:flex;gap:8px;align-items:center}.node-count{font-size:.75rem;color:var(--text-dim);background:var(--surface-2);padding:4px 10px;border-radius:10px}.canvas-area{flex:1;min-height:0;overflow:auto;position:relative;background:radial-gradient(circle at 1px 1px,var(--border) 1px,transparent 0) 0 0 / 40px 40px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.canvas-area::-webkit-scrollbar{width:6px;height:6px}.canvas-area::-webkit-scrollbar-track{background:transparent}.canvas-area::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.canvas-zoom-wrapper{display:inline-block}.zoom-controls{position:absolute;bottom:14px;right:14px;display:flex;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 6px;z-index:5}.zoom-btn{background:var(--surface-2);border:1px solid var(--border);color:var(--text);width:30px;height:30px;border-radius:6px;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;font-family:inherit;transition:all .12s}.zoom-btn:hover{background:var(--accent-soft);border-color:var(--accent)}.zoom-reset{font-size:.85rem}.zoom-level{font-size:.7rem;color:var(--text-dim);min-width:36px;text-align:center}.control-panel{background:var(--surface);border-top:1px solid var(--border);padding:14px 20px;padding-bottom:calc(14px + env(safe-area-inset-bottom,0px));flex-shrink:0;z-index:10}.selected-node{display:flex;align-items:center;gap:8px;margin-bottom:10px;min-height:24px}.selected-label{font-size:.75rem;color:var(--text-dim);flex-shrink:0}.selected-text{font-size:.9rem;color:var(--accent);font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.action-buttons{display:flex;gap:8px;flex-wrap:wrap}.btn-action{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:8px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.85rem;font-family:inherit;transition:all .15s;flex:1;min-width:70px;text-align:center}.btn-action:hover{background:var(--accent-soft);border-color:var(--accent)}.btn-action-danger:hover{background:#e74c3c1a;border-color:var(--danger);color:var(--danger)}.mode-input{display:flex;gap:8px;align-items:center}.mode-input input{flex:1;background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:10px 14px;border-radius:var(--radius-sm);font-size:.9rem;font-family:inherit;outline:none;transition:border-color .2s}.mode-input input:focus{border-color:var(--accent)}.mode-input input::placeholder{color:var(--text-dim)}.mode-confirm{display:flex;gap:10px;align-items:center}.delete-warn{font-size:.85rem;color:var(--danger);font-weight:600}.btn{padding:12px 24px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;cursor:pointer;border:none;font-family:inherit;transition:all .15s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--text-dim);border:1px solid var(--border)}.btn-ghost:hover{color:var(--text);border-color:var(--text-dim)}.btn-sm{padding:8px 14px;font-size:.85rem}.btn-share{background:var(--accent);color:#fff;padding:8px 16px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:500;cursor:pointer;border:none;font-family:inherit;transition:all .15s}.btn-share:hover{background:var(--accent-hover)}.btn-danger{background:var(--danger);color:#fff;border:none;padding:8px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:.85rem;font-family:inherit;transition:opacity .15s}.btn-danger:hover{opacity:.85}@keyframes fadeIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.canvas-header{padding:10px 14px}.control-panel{padding:12px 14px}.action-buttons{gap:6px}.btn-action{padding:8px 10px;font-size:.8rem}.container{padding-top:20px}.title{font-size:1.6rem}}