:root{--bg:oklch(96% 0 0);--surface:oklch(99% 0 0);--surface-2:oklch(93% 0 0);--ink:oklch(15% 0 0);--muted:oklch(43% 0 0);--line:oklch(82% 0 0);--accent:oklch(15% 0 0);--accent-strong:oklch(15% 0 0);--accent-soft:oklch(91% 0 0);--success:oklch(22% 0 0);--preview-grid-bg:oklch(99% 0 0);--preview-grid-line:oklch(91% 0 0);--preview-grid-major:oklch(84% 0 0);--shadow:none;--radius-lg:28px;--radius-md:18px;--radius-sm:12px;color:var(--ink);background:var(--bg);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,select{font:inherit}button,a.download,select,input,.file-drop{transition:border-color .18s,background-color .18s,color .18s,box-shadow .18s,transform .18s}.app-shell{width:min(1480px,100vw - 40px);margin:0 auto;padding:28px 0}.hero{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:22px;display:flex}.eyebrow{color:var(--accent-strong);letter-spacing:.12em;text-transform:uppercase;margin:0 0 8px;font-size:11px;font-weight:800}h1,h2,p{margin-top:0}h1{letter-spacing:-.04em;margin-bottom:8px;font-size:34px;line-height:1}h2{letter-spacing:-.02em;margin-bottom:2px;font-size:17px}.lead{max-width:620px;color:var(--muted);margin-bottom:0;font-size:15px;line-height:1.55}.workspace{grid-template-columns:minmax(360px,420px) minmax(0,1fr);align-items:start;gap:22px;display:grid}.control-panel,.preview-panel{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow)}.control-panel{overflow:hidden}.panel-section{border-bottom:1px solid var(--line);padding:22px}.panel-section:last-child{border-bottom:0}.section-heading{grid-template-columns:34px 1fr;align-items:start;gap:12px;margin-bottom:16px;display:grid}.section-heading p,.hint,.warn{color:var(--muted);font-size:12px;line-height:1.45}.section-heading p{margin:0}.step{background:var(--accent-soft);width:34px;height:34px;color:var(--accent-strong);border-radius:999px;place-items:center;font-size:12px;font-weight:850;display:inline-grid}label{color:oklch(31% .019 76);margin:13px 0 6px;font-size:12px;font-weight:750;display:block}input,select{border:1px solid var(--line);border-radius:var(--radius-sm);width:100%;min-height:42px;color:var(--ink);background:oklch(100% .004 83);outline:none;padding:10px 12px}input:focus,select:focus,.file-drop:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px oklch(15% 0 0/.1)}.field-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.unit-field{border:1px solid var(--line);border-radius:var(--radius-sm);background:oklch(100% .004 83);grid-template-columns:1fr auto;align-items:center;display:grid}.unit-field:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px oklch(15% 0 0/.1)}.unit-field input{min-height:40px;box-shadow:none;background:0 0;border:0}.unit-field span{color:var(--muted);padding-right:12px;font-size:12px;font-weight:750}.hint{border-radius:var(--radius-sm);background:var(--surface-2);margin:10px 0 0;padding:10px 12px}.button-stack{gap:10px;display:grid}.export-panel{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.export-label{color:var(--muted);letter-spacing:.12em;text-transform:uppercase;margin:0 0 8px;font-size:11px;font-weight:850}.export-row{grid-template-columns:1fr 1fr;gap:10px;margin-top:8px;display:grid}.secondary-export-row{margin-top:14px}button,a.download{border-radius:var(--radius-sm);cursor:pointer;text-align:center;border:1px solid #0000;width:100%;min-height:44px;padding:11px 14px;font-weight:800;text-decoration:none}button.primary,button:not(.secondary):not(.export-primary),.export-primary{background:var(--accent-strong);color:var(--surface)}button.primary:hover,button:not(.secondary):not(.export-primary):hover,.export-primary:hover{background:oklch(27% 0 0);transform:translateY(-1px)}.export-primary{width:100%}button.secondary{background:var(--surface-2);border-color:var(--line);color:var(--ink)}button.secondary:hover{background:oklch(88% 0 0);border-color:oklch(65% 0 0)}.logout-form{flex:none;margin-left:auto}.logout-button{width:auto;min-height:34px;color:var(--muted);white-space:nowrap;border-radius:999px;padding:7px 11px;font-size:12px;font-weight:800}button:disabled{cursor:not-allowed;opacity:.45;transform:none}.download{background:var(--success);color:var(--surface);display:block}.download.disabled{cursor:not-allowed;opacity:.45;pointer-events:none}.hidden{display:none!important}.file-input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.file-drop{border-radius:var(--radius-md);background:var(--surface);cursor:pointer;border:1px dashed oklch(65% 0 0);grid-template-columns:auto 1fr;align-items:center;gap:12px;margin:0 0 10px;padding:14px;display:grid}.file-drop:hover,.file-drop.is-dragover{border-color:var(--accent);background:var(--surface-2)}.file-drop.is-dragover{outline:3px solid oklch(15% 0 0/.1)}.file-icon{background:var(--ink);width:46px;height:46px;color:var(--surface);letter-spacing:.04em;border-radius:14px;place-items:center;font-size:12px;font-weight:900;display:inline-grid}.file-drop strong,.file-drop small{display:block}.file-drop small{color:var(--muted);margin-top:2px;font-size:12px}.check{color:var(--muted);align-items:flex-start;gap:9px;margin:14px 0 0;font-size:12px;font-weight:650;display:flex}.check input{width:16px;min-height:16px;accent-color:var(--accent-strong);margin-top:1px}.preview-panel{background:var(--surface);padding:22px;position:sticky;top:20px;overflow:auto}.preview-panel:before{content:"";background:var(--ink);transform-origin:0;opacity:0;height:3px;transition:opacity .16s,transform .16s;position:absolute;top:0;left:22px;right:22px;transform:scaleX(0)}.preview-panel.is-rendering:before{opacity:1;animation:.9s ease-in-out infinite preview-loading}.preview-panel.is-rendering canvas,.preview-panel.is-rendering #previewImg{opacity:.55}.preview-header{justify-content:space-between;align-items:start;gap:16px;margin-bottom:18px;display:flex}.preview-badge{border:1px solid var(--line);background:var(--surface-2);color:var(--muted);white-space:nowrap;border-radius:999px;padding:7px 10px;font-size:11px;font-weight:800}canvas{background:linear-gradient(var(--preview-grid-major) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-major) 1px, transparent 1px), linear-gradient(var(--preview-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-line) 1px, transparent 1px), var(--preview-grid-bg);background-size:100px 100px,100px 100px,20px 20px,20px 20px;border:1px solid oklch(70% 0 0);border-radius:16px;max-width:100%;height:auto;margin:18px auto 0;transition:opacity .16s;display:block}.preview-canvas-wrap{width:100%}.preview-canvas-wrap.has-preview{background:linear-gradient(var(--preview-grid-major) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-major) 1px, transparent 1px), linear-gradient(var(--preview-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-line) 1px, transparent 1px), var(--preview-grid-bg);background-size:100px 100px,100px 100px,20px 20px,20px 20px;border:1px solid oklch(70% 0 0);border-radius:16px;margin:18px auto 0;padding:clamp(12px,1.8vw,24px)}#previewImg{background:0 0;border:0;border-radius:10px;max-width:100%;height:auto;margin:0 auto;transition:opacity .16s;display:block}.preview-empty{border:1px solid var(--ink);background:linear-gradient(var(--preview-grid-major) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-major) 1px, transparent 1px), linear-gradient(var(--preview-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--preview-grid-line) 1px, transparent 1px), var(--ink);width:100%;min-height:clamp(220px,38vw,420px);color:var(--surface);cursor:pointer;background-size:100px 100px,100px 100px,20px 20px,20px 20px;border-radius:16px;place-items:center;margin:18px auto 0;padding:24px;display:grid;position:relative;overflow:hidden}.preview-empty:before,.preview-empty:after{content:none}.preview-empty span{z-index:1;color:var(--surface);letter-spacing:.08em;text-transform:uppercase;font-size:13px;font-weight:850;position:relative}.preview-empty:hover span,.preview-empty:focus-visible span{color:oklch(88% 0 0)}.status{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--ink);color:var(--surface);white-space:pre-wrap;margin-top:14px;padding:13px 14px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;line-height:1.55}.warn{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface-2);margin:12px 0 0;padding:12px 14px}@media (width<=1080px){.workspace{grid-template-columns:1fr}.preview-panel{min-height:auto;position:static}}@media (width<=720px){.app-shell{width:min(100vw - 24px,1480px);padding:16px 0}.hero,.preview-header{display:block}.logout-form{margin-top:14px;margin-left:0}.logout-button{min-height:32px}.field-grid,.export-row{grid-template-columns:1fr}.panel-section,.preview-panel{padding:18px}}@keyframes preview-loading{0%{transform:scaleX(.08)}45%{transform:scaleX(.72)}to{transform:scaleX(1)}}