:root{--bg-primary: #0c0c12;--bg-secondary: #14141e;--bg-panel: rgba(20, 20, 34, .85);--bg-panel-solid: #16162a;--bg-hover: rgba(99, 102, 241, .08);--bg-active: rgba(99, 102, 241, .15);--bg-input: rgba(255, 255, 255, .05);--bg-input-focus: rgba(255, 255, 255, .08);--border-color: rgba(255, 255, 255, .06);--border-focus: rgba(99, 102, 241, .5);--text-primary: #e8e8f0;--text-secondary: #8888a4;--text-muted: #5a5a78;--accent: #6366f1;--accent-light: #818cf8;--accent-glow: rgba(99, 102, 241, .25);--accent-gradient: linear-gradient(135deg, #6366f1 0%, #818cf8 100%);--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--font-sans: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "Courier New", monospace;--topbar-h: 52px;--panel-w: 260px;--action-h: 52px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--glass-blur: blur(20px);--shadow-sm: 0 1px 3px rgba(0,0,0,.3);--shadow-md: 0 4px 12px rgba(0,0,0,.4);--shadow-lg: 0 8px 32px rgba(0,0,0,.5);--transition: .2s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;font-family:var(--font-sans);font-size:13px;background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-user-select:none;user-select:none}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;outline:none;background:none;color:inherit}input,select{font-family:inherit;font-size:inherit;outline:none;color:inherit}.hidden{display:none!important}.hidden-input{position:absolute;opacity:0;pointer-events:none;width:0;height:0}.mobile-warning{display:none;position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:var(--bg-primary);justify-content:center;align-items:center;text-align:center}.mobile-warning-content{padding:2rem}.mobile-warning-icon{font-size:3rem;margin-bottom:1rem}.mobile-warning h2{font-size:1.3rem;margin-bottom:.5rem}.mobile-warning p{color:var(--text-secondary)}@media (max-width: 768px){.mobile-warning{display:flex}.topbar,.app-layout,.action-bar{display:none!important}}.topbar{height:var(--topbar-h);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:var(--bg-panel);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border-color);position:relative;z-index:100}.topbar-left,.topbar-center,.topbar-right{display:flex;align-items:center}.logo{display:flex;align-items:center;gap:8px}.logo-icon{font-size:18px;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-weight:700}.logo-text{font-size:16px;font-weight:700;letter-spacing:-.3px}.logo-sub{font-size:11px;color:var(--text-muted);padding:1px 6px;border:1px solid var(--border-color);border-radius:4px}.slogan{font-size:12px;color:var(--text-secondary);letter-spacing:.5px}.privacy-badge{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--success);background:#10b98114;padding:4px 10px;border-radius:20px;border:1px solid rgba(16,185,129,.15)}.privacy-badge svg{flex-shrink:0}.app-layout{display:flex;height:calc(100vh - var(--topbar-h) - var(--action-h))}.control-panel{width:var(--panel-w);min-width:var(--panel-w);background:var(--bg-panel);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border-right:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto;z-index:50}.control-panel::-webkit-scrollbar{width:4px}.control-panel::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:2px}.panel-tabs{display:flex;border-bottom:1px solid var(--border-color)}.tab-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:12px 8px;font-size:13px;font-weight:500;color:var(--text-secondary);transition:all var(--transition);position:relative}.tab-btn:hover{color:var(--text-primary);background:var(--bg-hover)}.tab-btn.active{color:var(--accent-light)}.tab-btn.active:after{content:"";position:absolute;bottom:0;left:20%;right:20%;height:2px;background:var(--accent-gradient);border-radius:2px 2px 0 0}.panel-content{display:none;flex-direction:column;padding:12px;gap:4px;animation:panelFadeIn .2s ease}.panel-content.active{display:flex}@keyframes panelFadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.panel-section{padding:10px 0;border-bottom:1px solid var(--border-color)}.panel-section:last-child{border-bottom:none}.section-label{display:block;font-size:11px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}.section-label span{color:var(--accent-light);font-weight:500}.style-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.style-btn{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 4px;border-radius:var(--radius-sm);border:1px solid var(--border-color);transition:all var(--transition);font-size:11px;color:var(--text-secondary)}.style-btn:hover{border-color:var(--accent);background:var(--bg-hover)}.style-btn.active{border-color:var(--accent);background:var(--bg-active);color:var(--accent-light)}.style-preview{width:32px;height:24px;border-radius:4px;overflow:hidden}.pixelate-preview{background:repeating-conic-gradient(#444,#444 25%,#666 0%,#666 50%) 0 0 / 8px 8px}.blur-preview{background:linear-gradient(135deg,#555,#888);filter:blur(2px)}.solid-preview{background:#222;border:1px solid #555}.slider-row{display:flex;align-items:center;gap:10px}.slider{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:4px;background:#ffffff1a;border-radius:2px;outline:none}.slider::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer;box-shadow:0 0 8px var(--accent-glow);transition:transform var(--transition)}.slider::-webkit-slider-thumb:hover{transform:scale(1.2)}.slider::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer;border:none}.slider-val{font-size:11px;color:var(--accent-light);min-width:36px;text-align:right;font-variant-numeric:tabular-nums}.color-row{display:flex;gap:8px;align-items:center}.color-btn,.wm-color-btn{width:28px;height:28px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all var(--transition);position:relative}.color-btn:hover,.wm-color-btn:hover{transform:scale(1.15)}.color-btn.active,.wm-color-btn.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}.color-btn[data-color="#ffffff"],.wm-color-btn[data-color="#ffffff"]{border-color:#fff3}.color-picker{width:28px;height:28px;border:none;border-radius:50%;cursor:pointer;background:none;padding:0}.color-picker::-webkit-color-swatch-wrapper{padding:0}.color-picker::-webkit-color-swatch{border:2px solid rgba(255,255,255,.2);border-radius:50%}.mode-toggle{display:flex;background:var(--bg-input);border-radius:var(--radius-sm);padding:3px;gap:2px}.mode-btn{flex:1;padding:6px 12px;border-radius:4px;font-size:12px;font-weight:500;color:var(--text-secondary);transition:all var(--transition)}.mode-btn:hover{color:var(--text-primary)}.mode-btn.active{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm)}.text-input{width:100%;padding:8px 12px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);transition:all var(--transition)}.text-input:focus{background:var(--bg-input-focus);border-color:var(--border-focus);box-shadow:0 0 0 3px var(--accent-glow)}.select-input{width:100%;padding:8px 12px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);transition:all var(--transition);cursor:pointer}.select-input:focus{border-color:var(--border-focus)}.select-input option{background:var(--bg-panel-solid)}.hint{font-size:11px;color:var(--text-muted);line-height:1.6;padding:8px 0 0}.tiled-only{display:none}.tiled-only.visible{display:block}.canvas-area{flex:1;position:relative;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at center,rgba(99,102,241,.03) 0%,transparent 70%),var(--bg-primary);overflow:hidden}.drop-zone{position:absolute;top:16px;right:16px;bottom:16px;left:16px;border:2px dashed rgba(99,102,241,.3);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;transition:all .3s ease;z-index:10}.drop-zone.drag-over{border-color:var(--accent);background:#6366f10d;box-shadow:inset 0 0 60px #6366f10d}.drop-zone.drag-over .drop-icon svg{stroke:var(--accent-light);transform:scale(1.1)}.drop-zone-content{text-align:center;animation:dropZonePulse 3s ease-in-out infinite}@keyframes dropZonePulse{0%,to{opacity:.8}50%{opacity:1}}.drop-icon{margin-bottom:16px}.drop-icon svg{color:var(--text-muted);transition:all .3s ease}.drop-zone-content h3{font-size:16px;font-weight:600;margin-bottom:6px;color:var(--text-primary)}.drop-zone-content p{font-size:12px;color:var(--text-muted);margin-bottom:12px}.drop-actions{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:12px}.drop-hint{font-size:11px;color:var(--text-muted)}.format-hint{font-size:11px;color:var(--text-muted);opacity:.6}.canvas-container{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:repeating-conic-gradient(rgba(255,255,255,.03) 0% 25%,transparent 0% 50%) 0 0 / 20px 20px}.canvas-container canvas{box-shadow:var(--shadow-lg)}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:all var(--transition);white-space:nowrap}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 2px 8px var(--accent-glow)}.btn-primary:hover:not(:disabled){box-shadow:0 4px 16px var(--accent-glow);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-ghost{color:var(--text-secondary);background:transparent}.btn-ghost:hover:not(:disabled){color:var(--text-primary);background:var(--bg-hover)}.btn:disabled{opacity:.35;cursor:not-allowed}.action-bar{height:var(--action-h);display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:var(--bg-panel);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border-top:1px solid var(--border-color);z-index:100}.action-group{display:flex;align-items:center;gap:6px}.action-left{justify-content:flex-start;min-width:120px}.action-center{justify-content:center}.action-right{justify-content:flex-end;min-width:200px}.toast{position:fixed;bottom:80px;left:50%;transform:translate(-50%) translateY(20px);padding:10px 20px;background:var(--bg-panel-solid);border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:13px;color:var(--text-primary);box-shadow:var(--shadow-lg);opacity:0;transition:all .3s ease;z-index:999;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.toast.success{border-color:#10b9814d;color:var(--success)}.toast.error{border-color:#ef44444d;color:var(--danger)}.canvas-area.mode-mask{cursor:crosshair}.canvas-container .upper-canvas{cursor:inherit!important}