:root{--bg: #f5f5f5;--surface: #ffffff;--surface-2: #f0f0f0;--surface-3: #e5e5e5;--border: #e5e5e5;--text: #3c3c3c;--text-muted: #afafaf;--canvas-grid-dot: rgba(15, 23, 42, .13);--accent: #2A7CFF;--accent-hover: #1667ec;--accent-shadow: #0f55c7;--correct: #58cc02;--correct-bg: rgba(88, 204, 2, .1);--incorrect: #ff4b4b;--incorrect-bg: rgba(255, 75, 75, .08);--blue-bg: rgba(28, 119, 246, .1);--dock-radius: 7px;--dock-item-radius: 5px;--dock-lift: 0 0 0 1.5px var(--border);--dock-ease: cubic-bezier(.32, .72, 0, 1);--purple: #ce82ff;--yellow: #ffc700;--blue: #456CFE;--green: #58cc02;--red: #E55B86;--orange: #e5925b}@media(prefers-color-scheme:dark){:root{--bg: #1a1a1a;--surface: #262626;--surface-2: #333333;--surface-3: #444444;--border: #444444;--text: #e0e0e0;--text-muted: #a0a0a0;--canvas-grid-dot: rgba(226, 232, 240, .16)}}.drawing-canvas{position:relative;overflow:hidden;background:var(--surface);color:var(--text);touch-action:none}.drawing-canvas__surface{display:block;width:100%;height:100%;touch-action:none;-webkit-user-select:none;user-select:none;outline:none}.drawing-canvas__zoom-control{position:absolute;right:.85rem;bottom:.85rem;z-index:25;display:flex;align-items:center;gap:.1rem;padding:0;border-radius:var(--dock-radius);background:var(--surface-2);-webkit-user-select:none;user-select:none}.drawing-canvas__zoom-btn{display:inline-flex;align-items:center;justify-content:center;width:2.2rem;height:2.2rem;border:0;border-radius:var(--dock-item-radius);background:transparent;color:var(--text);cursor:pointer;transition:background .18s var(--dock-ease),transform .18s var(--dock-ease)}.drawing-canvas__zoom-btn:hover{background:var(--surface-2)}.drawing-canvas__zoom-btn:active{transform:scale(.92)}.drawing-canvas__zoom-level{min-width:3.1rem;height:1.9rem;padding:0 .3rem;border:0;border-radius:var(--dock-item-radius);background:transparent;color:var(--text);font:inherit;font-size:.8rem;font-weight:600;font-variant-numeric:tabular-nums;cursor:pointer;transition:background .18s var(--dock-ease)}.drawing-canvas__zoom-level:hover{background:var(--surface-2)}.drawing-canvas__zoom-sep{width:1.5px;height:1.25rem;margin:0 .15rem;border-radius:999px;background:var(--surface-3)}.drawing-canvas__surface--eraser{cursor:crosshair}.drawing-canvas__selection-ai{position:absolute;z-index:45;width:2rem;height:2rem;display:inline-flex;align-items:center;justify-content:center;padding:0;border:0;border-radius:var(--dock-item-radius);background:var(--accent);color:#fff;transform:translate(22%,22%);cursor:pointer;transition:background .18s var(--dock-ease),transform .18s var(--dock-ease)}.drawing-canvas__selection-ai:hover{background:var(--accent-hover);transform:translate(22%,22%) scale(1.06)}.drawing-canvas__selection-ai:active{transform:translate(22%,22%) scale(.96)}.drawing-canvas__selection-ai:focus-visible{outline:2px solid #fff;outline-offset:2px}.drawing-canvas__writing-guide-line{stroke:var(--border);stroke-width:7;opacity:.9}.drawing-canvas__dock-wrap{position:absolute;left:50%;bottom:1.5rem;z-index:20;display:flex;flex-direction:column;align-items:center;transform:translate(-50%)}.drawing-canvas__toolbar{position:relative;display:flex;align-items:center;gap:.5rem;padding:.3rem;border:0;border-radius:var(--dock-radius);background:var(--surface-2)}.drawing-canvas__style-bar{position:absolute;display:flex;align-items:center;gap:.25rem;padding:.3rem;border-radius:var(--dock-radius);background:var(--surface-2);white-space:nowrap;opacity:0;pointer-events:none;z-index:20}.drawing-canvas__style-bar--visible{opacity:1;pointer-events:auto;animation:drawing-canvas-fade .18s var(--dock-ease) both}@keyframes drawing-canvas-fade{0%{opacity:0}}.drawing-canvas__style-color-wrap{position:relative}.drawing-canvas__style-color-wrap .drawing-canvas__style-btn--active{background:var(--surface-2)}.drawing-canvas__color-picker-popover--below{bottom:auto;top:calc(100% + 8px)}.drawing-canvas__style-group{display:flex;align-items:center;gap:.125rem}.drawing-canvas__style-divider{width:2px;height:1.25rem;margin:0 .125rem;border-radius:999px;background:var(--surface-3)}.drawing-canvas__style-btn{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:0;border-radius:var(--dock-item-radius);background:transparent;color:var(--text);cursor:pointer;font:inherit;transition:background .18s var(--dock-ease),color .18s var(--dock-ease)}.drawing-canvas__style-btn:hover:not(.drawing-canvas__style-btn--active):not(.drawing-canvas__style-btn--disabled){background:var(--surface-2)}.drawing-canvas__style-btn--active{background:var(--accent);color:#fff}.drawing-canvas__style-btn--disabled{color:var(--text-muted);cursor:not-allowed;opacity:.5}.drawing-canvas__toolbar-group,.drawing-canvas__color-group{display:flex;align-items:center;gap:.25rem}.drawing-canvas__color-group{gap:.125rem}.drawing-canvas__shape-wrap{position:relative}.drawing-canvas__shape-popover{position:absolute;bottom:calc(100% + 10px);left:50%;z-index:100;display:grid;grid-template-columns:repeat(3,2.25rem);gap:.25rem;padding:.4rem;border:0;border-radius:var(--dock-radius);background:var(--surface);box-shadow:var(--dock-lift);transform:translate(-50%);animation:drawing-canvas-pop .2s var(--dock-ease) both}@keyframes drawing-canvas-pop{0%{opacity:0;transform:translate(-50%) translateY(6px) scale(.97)}}.drawing-canvas__shape-option{display:inline-flex;width:2.25rem;height:2.25rem;align-items:center;justify-content:center;border:0;border-radius:var(--dock-item-radius);background:transparent;color:var(--text);cursor:pointer;transition:background .18s var(--dock-ease),color .18s var(--dock-ease)}.drawing-canvas__shape-option:hover:not(.drawing-canvas__shape-option--active){background:var(--surface-2)}.drawing-canvas__shape-option--active{background:var(--accent);color:#fff}.drawing-canvas__toolbar-group--separated{position:relative;padding-right:.5rem}.drawing-canvas__toolbar-group--separated:after{content:"";position:absolute;top:50%;right:0;transform:translateY(-50%);width:2px;height:1.25rem;border-radius:999px;background:var(--surface-3)}.drawing-canvas__toolbar-btn,.drawing-canvas__color-btn{display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--text);cursor:pointer;font:inherit;transition:background .18s var(--dock-ease),color .18s var(--dock-ease),opacity .18s var(--dock-ease),transform .18s var(--dock-ease)}.drawing-canvas__toolbar-btn:active:not(.drawing-canvas__toolbar-btn--disabled),.drawing-canvas__color-btn:active{transform:scale(.92)}.drawing-canvas__toolbar-btn{width:2.25rem;height:2.25rem;border-radius:var(--dock-item-radius)}.drawing-canvas__toolbar-btn:hover:not(.drawing-canvas__toolbar-btn--active):not(.drawing-canvas__toolbar-btn--disabled),.drawing-canvas__color-btn:hover{background:var(--surface-2)}.drawing-canvas__toolbar-btn--active{background:var(--accent);color:#fff}.drawing-canvas__toolbar-btn--active.drawing-canvas__toolbar-btn--fill-icon svg{fill:currentColor}.drawing-canvas__color-wheel-wrap .drawing-canvas__toolbar-btn--active{background:var(--surface-2)}.drawing-canvas__toolbar-btn--disabled{color:var(--text-muted);cursor:not-allowed}.drawing-canvas__toolbar-icon{display:inline-flex;width:1.25rem;height:1.25rem;align-items:center;justify-content:center}.drawing-canvas__toolbar-icon svg{width:1.25rem;height:1.25rem}.drawing-canvas__color-btn{width:1.75rem;height:1.75rem;border-radius:var(--dock-item-radius)}.drawing-canvas__color-trigger{position:relative}.drawing-canvas__color-btn--active{background:var(--surface-2)}.drawing-canvas__color-swatch{width:1.25rem;height:1.25rem;border-radius:999px}.drawing-canvas__color-swatch--wheel{background:conic-gradient(#dd5f5f,#ddbe5f,#8fd24b,#3bce60,#3bcece,#5778db,#9e5fdd,#dd5fbe,#dd5f5f)}.drawing-canvas__color-wheel-wrap{position:relative}.drawing-canvas__color-picker-popover{position:absolute;bottom:calc(100% + 10px);height:fit-content;left:50%;display:flex;flex-direction:column;gap:8px;padding:9px;background:var(--surface);border:0;border-radius:var(--dock-radius);box-shadow:var(--dock-lift);z-index:100;width:134px;transform:translate(-50%);animation:drawing-canvas-pop .2s var(--dock-ease) both}.drawing-canvas__stroke-slider-wrap{display:flex;align-items:center;gap:7px;min-width:0;height:15px}.drawing-canvas__stroke-slider{-webkit-appearance:none;appearance:none;flex:1;min-width:0;max-width:90px;height:4px;border:0;border-radius:999px;background:var(--surface-3);outline:none;cursor:pointer}.drawing-canvas__stroke-slider::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;border:2px solid var(--surface);border-radius:999px;background:var(--text);cursor:pointer}.drawing-canvas__stroke-slider::-moz-range-thumb{width:13px;height:13px;border:2px solid var(--surface);border-radius:999px;background:var(--text);cursor:pointer}.drawing-canvas__stroke-slider-preview{display:inline-flex;flex:0 0 auto;border-radius:999px;background:currentColor}.drawing-canvas__color-grid{display:grid;grid-template-columns:repeat(3,2.25rem);gap:.25rem;justify-content:center}.drawing-canvas__color-option{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border:0;border-radius:var(--dock-item-radius);background:transparent;cursor:pointer;transition:background .18s var(--dock-ease),transform .18s var(--dock-ease)}.drawing-canvas__color-option:active{transform:scale(.92)}.drawing-canvas__color-option:hover:not(.drawing-canvas__color-option--active){background:var(--surface-2)}.drawing-canvas__color-option--active{background:var(--surface-2)}.drawing-canvas__color-option-dot{width:1.2rem;height:1.2rem;border-radius:999px}.drawing-canvas__color-custom{display:flex;flex-direction:column;gap:7px;padding-top:2px}.drawing-canvas__cp-sv{position:relative;width:100%;height:108px;border-radius:var(--radius-lg);cursor:crosshair;-webkit-user-select:none;user-select:none;touch-action:none;overflow:hidden;flex-shrink:0}.drawing-canvas__cp-sv-dot{position:absolute;width:11px;height:11px;border:2px solid #fff;border-radius:50%;box-shadow:0 0 0 1.5px #00000040;pointer-events:none;transform:translate(-50%,-50%)}.drawing-canvas__cp-hue{-webkit-appearance:none;appearance:none;width:100%;height:10px;border-radius:999px;border:none;outline:none;cursor:pointer;background:linear-gradient(to right,red,#ff8000,#ff0,#80ff00,#0f0,#00ff80,#0ff,#0080ff,#00f,#7f00ff,#f0f,#ff0080,red);flex-shrink:0}.drawing-canvas__cp-hue::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;border:2.5px solid #fff;background:transparent;box-shadow:0 0 0 1.5px #00000040;cursor:pointer}.drawing-canvas__cp-hue::-moz-range-thumb{width:14px;height:14px;border-radius:50%;border:2.5px solid #fff;background:transparent;box-shadow:0 0 0 1.5px #00000040;cursor:pointer}.drawing-canvas__cp-bottom{display:flex;align-items:center;gap:6px}.drawing-canvas__cp-preview{width:20px;height:20px;border-radius:var(--radius);flex-shrink:0;border:none}.drawing-canvas__color-picker-hex{flex:1;min-width:0;font:inherit;font-size:.68rem;font-family:monospace;letter-spacing:.04em;text-align:center;border:none;border-radius:var(--radius);background:var(--surface-2);color:var(--text);padding:3px 5px;outline:none;transition:border-color .15s ease}.drawing-canvas__color-picker-hex:focus{border-color:var(--accent)}.drawing-canvas__stroke-group{display:flex;align-items:center}.drawing-canvas__stroke-wrap{position:relative}.drawing-canvas__stroke-popover{position:absolute;bottom:calc(100% + 10px);left:50%;transform:translate(-50%);display:flex;flex-direction:column;gap:2px;padding:7px;background:var(--surface);border:0;border-radius:var(--dock-radius);box-shadow:var(--dock-lift);z-index:100;animation:drawing-canvas-pop .2s var(--dock-ease) both}.drawing-canvas__stroke-option{display:flex;align-items:center;justify-content:center;border:0;border-radius:var(--dock-item-radius);background:transparent;color:var(--text);cursor:pointer;padding:4px 8px;transition:background .18s var(--dock-ease),color .18s var(--dock-ease)}.drawing-canvas__stroke-option:hover:not(.drawing-canvas__stroke-option--active){background:var(--surface-2)}.drawing-canvas__stroke-option--active{background:var(--accent);color:#fff}@media(max-width:640px){.drawing-canvas__zoom-control{top:.6rem;right:.6rem;bottom:auto}.drawing-canvas__zoom-btn{width:2rem;height:2rem}.drawing-canvas__dock-wrap{bottom:.6rem;max-width:calc(100% - .8rem)}.drawing-canvas__toolbar{gap:.3rem;padding:.2rem}.drawing-canvas__toolbar-group,.drawing-canvas__color-group{gap:.1rem}.drawing-canvas__toolbar-group--separated{padding-right:.3rem}.drawing-canvas__toolbar-btn{width:2rem;height:2rem;flex-shrink:0}.drawing-canvas__toolbar-icon,.drawing-canvas__toolbar-icon svg{width:1.15rem;height:1.15rem}}.ui-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;box-sizing:border-box;border:1px solid transparent;border-radius:calc(var(--radius-sm) + 1px);background:transparent;color:var(--text);font:inherit;font-weight:550;line-height:1;white-space:nowrap;cursor:pointer;transition:background-color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease)}.ui-btn--xs{height:24px;padding:0 7px;font-size:12px}.ui-btn--sm{height:30px;padding:0 10px;font-size:13px}.ui-btn--base{height:36px;padding:0 14px;font-size:14px}.ui-btn--square{padding:0;aspect-ratio:1}.ui-btn--secondary{background:transparent;border:none}.ui-btn--secondary:hover:not(:disabled){background:var(--surface-2)}.ui-btn--ghost{color:var(--text-muted)}.ui-btn--ghost:hover:not(:disabled){color:var(--text);background:var(--surface-3)}.ui-btn--primary{border-color:var(--accent);background:var(--accent);color:#fff}.ui-btn--primary:hover:not(:disabled){border-color:var(--accent-hover);background:var(--accent-hover)}.ui-btn--danger{border-color:var(--incorrect);background:var(--incorrect);color:#fff}.ui-btn--danger:hover:not(:disabled){filter:brightness(.94)}.ui-btn:disabled{opacity:.42;cursor:not-allowed}.ui-btn:focus-visible,.ui-input:focus-visible,.ui-select select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.ui-spinner{display:inline-block;flex:none;border:2px solid currentColor;border-radius:50%;border-top-color:transparent;opacity:.7;animation:ui-spin .7s linear infinite}@keyframes ui-spin{to{transform:rotate(360deg)}}.ui-field{display:flex;flex-direction:column;gap:6px}.ui-field__label{color:var(--text-muted);font-size:12px;font-weight:600}.ui-input{box-sizing:border-box;width:100%;min-width:0;font-weight:500!important;border-radius:var(--radius);background:var(--surface-2);border:none;color:var(--text);font:inherit;transition:border-color var(--dur-fast) var(--ease),background-color var(--dur-fast) var(--ease)}.ui-input::placeholder{color:var(--text-muted)}.ui-input--xs{height:24px;padding:0 7px;font-size:12px}.ui-input--sm{height:30px;padding:0 8px;font-size:13px}.ui-input--base{height:36px;padding:0 10px;font-size:14px}.ui-input:hover:not(:focus):not(:disabled){border-color:var(--text-muted)}.ui-input:focus{border-color:var(--accent);outline:none}.ui-input:disabled{opacity:.5;cursor:not-allowed}.ui-textarea{height:auto;padding:8px 10px;font-size:14px;line-height:1.5;resize:none}.ui-select{position:relative;display:inline-flex;align-items:center;min-width:0}.ui-select select{appearance:none;box-sizing:border-box;width:100%;min-width:0;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);font:inherit;cursor:pointer;transition:background-color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)}.ui-select select:hover{background:var(--surface-2)}.ui-select>svg{position:absolute;right:7px;color:var(--text-muted);pointer-events:none}.ui-select--xs select{height:24px;padding:0 20px 0 7px;font-size:12px}.ui-select--sm select{height:30px;padding:0 22px 0 8px;font-size:13px}.ui-select--base select{height:36px;padding:0 24px 0 10px;font-size:14px}.ui-badge{display:inline-flex;align-items:center;gap:4px;flex:none;padding:2px 6px;border-radius:var(--radius-sm);color:var(--text-muted);background:var(--surface-2);font-size:11px;font-weight:600;line-height:1.5;white-space:nowrap}.ui-badge--accent{border-color:color-mix(in srgb,var(--accent) 40%,transparent);color:color-mix(in srgb,var(--accent) 72%,var(--text));background:color-mix(in srgb,var(--accent) 12%,transparent)}.ui-badge--info{border-color:color-mix(in srgb,var(--blue) 40%,transparent);color:color-mix(in srgb,var(--blue) 72%,var(--text));background:color-mix(in srgb,var(--blue) 12%,transparent)}.ui-badge--danger{border-color:color-mix(in srgb,var(--incorrect) 40%,transparent);color:color-mix(in srgb,var(--incorrect) 78%,var(--text));background:var(--incorrect-bg)}.ui-tip{position:relative;display:inline-flex}.ui-tip:after{content:attr(data-tip);position:absolute;z-index:200;left:50%;padding:4px 7px;border-radius:var(--radius-sm);background:var(--text);color:var(--bg);font-size:11px;font-weight:550;line-height:1.4;white-space:nowrap;opacity:0;transform:translate(-50%);pointer-events:none;transition:opacity var(--dur-fast) var(--ease)}.ui-tip--bottom:after{top:calc(100% + 6px)}.ui-tip--top:after{bottom:calc(100% + 6px)}.ui-tip:hover:after,.ui-tip:focus-within:after{opacity:1;transition-delay:.24s}.ui-banner{display:flex;align-items:center;gap:10px;padding:9px 11px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);font-size:13px}.ui-banner--danger{border-color:color-mix(in srgb,var(--incorrect) 45%,transparent);background:var(--incorrect-bg)}.ui-banner__icon{display:inline-flex;flex:none;color:var(--text-muted)}.ui-banner__body{min-width:0;flex:1;display:flex;flex-direction:column;gap:2px}.ui-banner__body>strong{font-size:13px;font-weight:650}.ui-banner__body>span{color:var(--text-muted);word-break:break-word}.ui-empty{display:flex;flex-direction:column;align-items:center;gap:6px;padding:24px 18px;color:var(--text-muted);text-align:center}.ui-empty__icon{display:inline-flex;margin-bottom:2px}.ui-empty>strong{color:var(--text);font-size:14px;font-weight:650}.ui-empty>span{max-width:34ch;font-size:13px;line-height:1.5}.ui-overlay{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px;background:color-mix(in srgb,#000 34%,transparent);animation:ui-fade var(--dur-fast) var(--ease) both}.ui-modal{box-sizing:border-box;width:min(420px,100%);max-height:100%;display:flex;flex-direction:column;overflow:auto;padding:18px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);color:var(--text);animation:ui-rise var(--dur) var(--ease) both}.ui-modal__head{flex:none;display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.ui-modal__heading{min-width:0;display:flex;flex-direction:column;gap:4px}.ui-modal__title{margin:0;font-size:15px;font-weight:700}.ui-modal__desc{margin:0;color:var(--text-muted);font-size:13px;line-height:1.5}.ui-modal__actions{flex:none;display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-top:18px}@keyframes ui-fade{0%{opacity:0}}@keyframes ui-rise{0%{opacity:0;transform:translateY(6px)}}:root{--radius-sm: 6px;--radius: 10px;--radius-lg: 12px;--ease: cubic-bezier(.32, .72, 0, 1);--ease-out: cubic-bezier(.16, 1, .3, 1);--dur-fast: .13s;--dur: .2s;--dur-slow: .32s;--topbar-h: 48px;--chat-w: 360px}.auth{min-height:100dvh;display:grid;place-items:center;padding:24px;background:var(--surface-2)}.auth__card{width:min(420px,100%);padding:28px;border-radius:var(--radius-lg);background:var(--surface)}.auth__brand{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:750}.auth__heading{margin:34px 0 22px}.auth__heading h1{margin:0 0 7px;font-size:22px;line-height:1.25;letter-spacing:-.02em}.auth__heading p,.auth__fineprint{margin:0;color:var(--text-muted);font-size:13px;line-height:1.55}.auth__heading strong{color:var(--text);font-weight:600}.auth__form{display:flex;flex-direction:column;gap:14px}.auth__form>.ui-btn{width:100%;margin-top:2px;font-weight:600}.auth__turnstile{min-height:1px}.auth__code{height:52px;text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:24px;font-weight:700;letter-spacing:.26em}.auth__back{display:inline-flex;align-items:center;gap:5px;margin:28px 0 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var(--border);border-radius:50%;background:var(--surface);font-weight:750}.account-profile>div:last-child{min-width:0;display:flex;flex-direction:column;gap:1px}.account-profile strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.account-profile span{color:var(--text-muted);font-size:12px}.account-usage{display:grid;gap:22px;padding:24px 2px 4px}.usage-meter__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:13px}.usage-meter__head span{font-weight:650}.usage-meter__head strong{font-size:12px}.usage-meter__track{height:8px;overflow:hidden;border-radius:2px;background:var(--surface-3)}.usage-meter__track>span{display:block;height:100%;min-width:0;background:var(--accent);transition:width var(--dur-slow) var(--ease)}.usage-meter__track--ai>span{background:var(--blue)}.usage-meter p{margin:7px 0 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