:root{--blue: #2d5fa6;--blue-dark: #224a84;--blue-soft: #eaf0f8;--red: #e31e24;--text: #1c2430;--muted: #6b7686;--border: #d9e0ea;--bg: #f5f7fb;--card: #ffffff}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}.top{display:flex;align-items:center;gap:28px;padding:18px 32px;background:var(--card);border-bottom:3px solid var(--red)}.logo{height:56px;width:auto}.title{border-left:1px solid var(--border);padding-left:28px}.title h1{margin:0;font-size:20px;color:var(--blue)}.title p{margin:4px 0 0;font-size:14px;color:var(--muted)}main{max-width:1400px;margin:0 auto;padding:24px 32px 32px}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px}.tab{padding:10px 20px;font:inherit;font-weight:600;color:var(--muted);background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-1px;cursor:pointer}.tab:hover{color:var(--blue)}.tab.active{color:var(--blue);border-bottom-color:var(--red)}.panel{display:none;grid-template-columns:1fr 1fr;gap:20px}.panel.active{display:grid}.pane{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:10px;overflow:hidden;min-height:62vh}.pane-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 14px;border-bottom:1px solid var(--border);font-weight:600;color:var(--blue);min-height:52px}.actions{display:flex;gap:8px}textarea,.preview{flex:1;width:100%;border:0;padding:16px;font-size:16px;line-height:1.6;font-family:inherit;color:var(--text);resize:none;outline:none;background:var(--card)}#output,.preview{background:#fbfcfe}.preview{white-space:pre-wrap;overflow:auto;max-height:62vh}.preview.empty{color:var(--muted);display:flex;align-items:center;justify-content:center;text-align:center}.btn{font:inherit;font-size:14px;font-weight:600;padding:8px 16px;border-radius:6px;border:1px solid var(--blue);background:var(--blue);color:#fff;cursor:pointer;transition:background .15s}.btn:hover:not(:disabled){background:var(--blue-dark);border-color:var(--blue-dark)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.ghost{background:transparent;color:var(--blue)}.btn.ghost:hover{background:var(--blue-soft)}.drop{flex:1;margin:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:2px dashed var(--border);border-radius:10px;color:var(--blue);cursor:pointer;text-align:center;padding:24px;transition:border-color .15s,background .15s}.drop:hover,.drop.over{border-color:var(--blue);background:var(--blue-soft)}.drop.done{border-color:var(--blue);border-style:solid}.drop.error{border-color:var(--red);color:var(--red)}.drop span{color:var(--muted);font-size:14px}.legend{margin:18px 0 0;text-align:center;color:var(--muted);font-size:14px}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--blue);color:#fff;padding:10px 18px;border-radius:6px;font-size:14px;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translate(-50%)}.toast.err{background:var(--red)}@media (max-width: 800px){.top{flex-direction:column;align-items:flex-start;gap:12px;padding:16px}.title{border-left:0;padding-left:0}.logo{height:44px}main{padding:16px}.panel.active{grid-template-columns:1fr}.pane{min-height:40vh}}.files{list-style:none;margin:0;padding:0;white-space:normal}.files li{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.files .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.files .status{font-size:14px;color:var(--muted)}.files .status.ok{color:var(--blue)}.files .status.err{color:var(--red)}.btn.small{padding:4px 10px;font-size:13px}.btn.save{background:var(--red);border-color:var(--red)}.btn.save:hover:not(:disabled){background:#c4161c;border-color:#c4161c}.btn.save.saved{background:transparent;color:var(--blue);border-color:var(--blue)}.top-actions{margin-left:auto;display:flex;gap:8px}