:root{--brand-primary:#9B59B6;--brand-secondary:#8E44AD;--bg-primary:#ffffff;--bg-secondary:#fafafa;--bg-card:#fafafa;--bg-elevated:#ffffff;--text-primary:#1a1a1a;--text-secondary:#595959;--text-muted:#555555;--text-inverse:#ffffff;--border-color:#e5e5e5;--border-color-hover:#d0d0d0;--border-color-focus:#9B59B6;--btn-upload:#4A90E2;--btn-upload-hover:#357ABD;--btn-process:#27AE60;--btn-process-hover:#229954;--btn-download:#9B59B6;--btn-download-hover:#8E44AD;--btn-preview:#3498DB;--btn-preview-hover:#2980B9;--btn-danger:#E74C3C;--btn-danger-hover:#C0392B;--success:#27AE60;--error:#E74C3C;--warning:#F39C12;--info:#3498DB;--checker-light:#f5f5f5;--checker-dark:#e0e0e0;--shadow-sm:0 2px 4px rgba(0, 0, 0, 0.1);--shadow-md:0 4px 6px rgba(0, 0, 0, 0.1);--shadow-lg:0 10px 15px rgba(0, 0, 0, 0.1);--transition-fast:0.15s ease;--transition-normal:0.3s ease;--transition-slow:0.5s ease;--z-dropdown:1000;--z-header:1010;--z-modal:1020;--z-toast:1030}[data-theme=dark]{--bg-primary:#121212;--bg-secondary:#1e1e1e;--bg-card:#252525;--bg-elevated:#2a2a2a;--text-primary:#ffffff;--text-secondary:#e0e0e0;--text-muted:#b8b8b8;--text-inverse:#1a1a1a;--border-color:#4a4a4a;--border-color-hover:#5a5a5a;--border-color-focus:#9B59B6;--checker-light:#3a3a3a;--checker-dark:#2a2a2a;--shadow-sm:0 2px 4px rgba(0, 0, 0, 0.3);--shadow-md:0 4px 6px rgba(0, 0, 0, 0.3);--shadow-lg:0 10px 15px rgba(0, 0, 0, 0.3);--feature-bg:#f5f5f5;--feature-text:#1a1a1a}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color var(--transition-normal),color var(--transition-normal)}.theme-toggle{position:relative;background:var(--bg-card);border:2px solid var(--border-color);border-radius:50%;width:44px;height:44px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal)}.theme-toggle:hover{border-color:var(--border-color-hover);transform:scale(1.05)}.theme-toggle:active{transform:scale(.95)}.theme-toggle svg{width:20px;height:20px;stroke:var(--text-primary);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;position:absolute;transition:opacity var(--transition-normal),transform var(--transition-normal)}.theme-toggle .icon-moon{opacity:1}.theme-toggle .icon-sun,[data-theme=dark] .theme-toggle .icon-moon{opacity:0}[data-theme=dark] .theme-toggle .icon-sun{opacity:1}@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}:focus-visible{outline:2px solid var(--border-color-focus);outline-offset:2px}::selection{background-color:var(--brand-primary);color:var(--text-inverse)}::-moz-selection{background-color:var(--brand-primary);color:var(--text-inverse)}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:6px}::-webkit-scrollbar-thumb:hover{background:var(--border-color-hover)}.text-primary{color:var(--text-primary)}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-success{color:var(--success)}.text-error{color:var(--error)}.text-warning{color:var(--warning)}.text-info{color:var(--info)}.bg-primary{background-color:var(--bg-primary)}.bg-secondary{background-color:var(--bg-secondary)}.bg-card{background-color:var(--bg-card)}.border{border:1px solid var(--border-color)}.border-top{border-top:1px solid var(--border-color)}.border-bottom{border-bottom:1px solid var(--border-color)}.shadow-sm{box-shadow:var(--shadow-sm)}.shadow-md{box-shadow:var(--shadow-md)}.shadow-lg{box-shadow:var(--shadow-lg)}@media print{body{background:#fff;color:#000}.language-selector,.theme-toggle,button,nav{display:none!important}}