:root{--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-tertiary: #ffffff;--text-primary: #1a1a1a;--text-secondary: #6b7280;--border: #e5e7eb;--accent: #2563eb;--accent-hover: #1d4ed8;--input-bg: #ffffff;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, .1)}[data-theme=dark]{--bg-primary: #0f1419;--bg-secondary: #1a1f2e;--bg-tertiary: #242b3d;--text-primary: #e5e7eb;--text-secondary: #9ca3af;--border: #374151;--accent: #3b82f6;--accent-hover: #2563eb;--input-bg: #1a1f2e;--shadow: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6}.app-container{min-height:100vh;display:flex;flex-direction:column}.navbar{background:var(--bg-tertiary);border-bottom:1px solid var(--border);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow)}.nav-left{display:flex;gap:8px;align-items:center}.logo{display:flex;align-items:center;gap:.75rem;font-size:1.25rem;font-weight:600;color:var(--text-primary)}.logo svg{color:var(--accent)}.logo-text{display:none}@media(min-width:769px){.logo-text{display:inline}}.nav-right{display:flex;align-items:center;gap:1rem}.theme-switcher{display:flex;gap:.25rem;background:var(--bg-secondary);padding:.25rem;border-radius:.5rem;border:1px solid var(--border)}.theme-btn{padding:.5rem;border:none;background:transparent;color:var(--text-secondary);cursor:pointer;border-radius:.375rem;transition:all .2s;display:flex;align-items:center;justify-content:center}.theme-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.theme-btn.active{background:var(--accent);color:#fff}.download-btn{display:flex;align-items:center;gap:.5rem;padding:.625rem 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var(--border);overflow-y:auto;padding:2rem;height:100%}.left-panel::-webkit-scrollbar{width:8px}.left-panel::-webkit-scrollbar-track{background:var(--bg-secondary)}.left-panel::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.left-panel::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.section{margin-bottom:2rem}.section-title{font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:1rem}.input-group{margin-bottom:1.25rem}.label{display:block;font-size:.875rem;font-weight:500;color:var(--text-primary);margin-bottom:.5rem}.input{width:100%;padding:.625rem .875rem;background:var(--input-bg);border:1px solid var(--border);border-radius:.5rem;color:var(--text-primary);font-size:.9375rem;transition:all .2s}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px 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.2s;font-size:.9375rem}.select-button:hover{border-color:var(--accent)}.select-dropdown{position:absolute;top:100%;left:0;right:0;margin-top:.5rem;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:.5rem;box-shadow:var(--shadow-lg);max-height:300px;overflow-y:auto;z-index:10}.select-option{padding:.75rem .875rem;cursor:pointer;transition:background .15s;border-bottom:1px solid 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.2s;margin-bottom:1.5rem}.presets-button:hover{background:var(--accent);color:#fff;border-color:var(--accent)}.presets-grid{display:grid;grid-template-columns:1fr;gap:.75rem;margin-bottom:1.5rem}.preset-card{padding:.875rem;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:.5rem;cursor:pointer;transition:all .2s}.preset-card:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-1px)}.preset-name{font-weight:600;color:var(--text-primary);margin-bottom:.25rem}.preset-desc{font-size:.8125rem;color:var(--text-secondary);margin-bottom:.5rem}.preset-details{font-size:.75rem;color:var(--text-secondary);font-family:monospace}.spinner{animation:spin 1s linear infinite}.right-panel{background:var(--bg-primary);display:flex;align-items:center;justify-content:center;padding:2rem;overflow:auto;height:100%}.preview-container{width:100%;max-width:100%;height:100%;min-height:550px;background:var(--bg-secondary);border-radius:1rem;border:1px solid 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