:root{--bg: #ffffff;--surface: #f6fafc;--surface-soft: #eef4f7;--border: #e5e7eb;--text: #020817;--muted: #4b5563;--accent: #0c6583;--accent-hover: #094f69;--accent-bright: #149dca;--accent-soft: #cddee4;--accent-fg: #ffffff;--danger: #b91c1c;--ok: #0f766e;--shadow: 0 1px 2px rgba(2, 8, 23, .04), 0 2px 8px rgba(12, 101, 131, .06);--header-h: 88px;--footer-h: 40px;--gap: 14px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,sans-serif;font-size:14.5px;line-height:1.5}.app{display:flex;flex-direction:column;padding:20px 24px 12px;gap:12px;min-height:100vh}@media(min-width:900px){html,body{height:100%;overflow:hidden}.app{height:100vh;padding:18px 28px 10px}}.app__header{flex:0 0 auto}.app__grid{display:grid;grid-template-columns:1fr;gap:var(--gap);flex:1 1 auto;min-height:0}@media(min-width:900px){.app__grid{grid-template-columns:minmax(360px,1fr) 2fr}}.col{display:flex;flex-direction:column;gap:var(--gap);min-height:0}.app__header-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;flex-wrap:wrap}.brand{display:inline-flex;align-items:center;text-decoration:none}.brand__logo{height:28px;width:auto;display:block}.btn-download{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid var(--accent);border-radius:6px;background:var(--bg);color:var(--accent);font-weight:600;font-size:13px;text-decoration:none;transition:background .15s,color .15s,border-color .15s;white-space:nowrap}.btn-download:hover{background:var(--accent);color:var(--accent-fg)}.btn-download__icon{flex:0 0 auto}.app__header h1{margin:0 0 4px;font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--text);line-height:1.15}.subtitle{color:var(--muted);margin:0;max-width:70ch;font-size:13.5px}.card{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:16px 18px;box-shadow:var(--shadow)}.card--fill{display:flex;flex-direction:column;min-height:0;flex:1 1 auto;height:100%}.card h2{font-size:11px;font-weight:700;margin:0 0 12px;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}.hidden{display:none!important}.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:20px;border:2px dashed var(--border);border-radius:8px;cursor:pointer;transition:border-color .15s,background .15s;text-align:center;background:var(--surface)}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent-bright);background:var(--surface-soft)}.drop-zone__prompt{font-weight:500;color:var(--text);font-size:14px}.drop-zone__meta{color:var(--muted);font-size:12.5px}.field{margin-bottom:12px}.field:last-child{margin-bottom:0}.field>label{display:block;margin-bottom:5px;font-weight:500;color:var(--text);font-size:13.5px}.field-row{display:flex;gap:12px}.field-row>.field{flex:1}.field select,.field input[type=text],.field input[type=number]{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:8px 10px;font:inherit;transition:border-color .15s,box-shadow .15s}.field select:focus,.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #0c658326}.radio-row{display:flex;gap:18px;flex-wrap:wrap}.radio-row label,.checkbox{font-weight:400;cursor:pointer;color:var(--text);font-size:13.5px}input[type=radio],input[type=checkbox]{accent-color:var(--accent)}.hint{margin:5px 0 0;color:var(--muted);font-size:12.5px}button.primary{background:var(--accent);color:var(--accent-fg);border:none;border-radius:6px;padding:9px 18px;font:inherit;font-weight:600;font-size:14px;cursor:pointer;transition:background .15s,transform .05s;white-space:nowrap}button.primary:hover{background:var(--accent-hover)}button.primary:active{transform:translateY(1px)}button.primary:disabled{opacity:.5;cursor:not-allowed;background:var(--accent)}.results-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:10px}.results-head>div{min-width:0;flex:1}.results-head h2{margin-bottom:4px}.progress-bar{height:6px;background:var(--surface-soft);border-radius:3px;overflow:hidden;border:1px solid var(--border);margin-bottom:10px;flex:0 0 auto}.progress-bar__fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent) 0%,var(--accent-bright) 100%);transition:width .2s ease-out}.results-list{list-style:none;padding:0;margin:0;overflow:auto;border:1px solid var(--border);border-radius:6px;background:var(--bg)}.results-list:empty{display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;background:var(--surface);border-style:dashed}.results-list:empty:before{content:"Split output appears here";padding:24px}.results-list--fill{flex:1 1 auto;min-height:120px}.results-list li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 12px;border-bottom:1px solid var(--border);background:var(--bg)}.results-list li:nth-child(2n){background:var(--surface)}.results-list li:last-child{border-bottom:none}.results-list a{color:var(--accent);text-decoration:none;font-weight:500;word-break:break-all;font-size:13.5px}.results-list a:hover{color:var(--accent-bright);text-decoration:underline}.results-list .meta{color:var(--muted);font-size:12.5px;white-space:nowrap}.results-foot{flex:0 0 auto;padding-top:8px}footer{flex:0 0 auto;text-align:center;color:var(--muted);font-size:12px}