*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f7f8fa;--surface:#fff;--border:#dfe1e6;--text:#172b4d;--text-sub:#5e6c84;--primary:#0052cc;--primary-hover:#0747a6;--danger:#de350b;--danger-hover:#bf2600;--focus:#4c9aff;--radius:4px;--shadow:0 1px 3px rgba(0,0,0,.1)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
#app{max-width:1100px;margin:0 auto;padding:20px}
header{text-align:center;margin-bottom:24px;position:relative}
h1{font-size:28px;font-weight:700;color:var(--text)}
header p{color:var(--text-sub);margin-top:4px}
#lang-switcher{position:absolute;top:0;right:0;display:flex;gap:4px}
.lang-btn{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:4px 10px;cursor:pointer;font-size:13px;color:var(--text-sub)}
.lang-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;justify-content:space-between}
.toolbar-group{display:flex;gap:6px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:none;border-radius:var(--radius);cursor:pointer;font-size:13px;font-weight:500;transition:background .15s}
.btn:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:var(--danger-hover)}
.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{background:#f4f5f7}
.table-container{overflow-x:auto;margin-bottom:20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;table-layout:fixed;min-width:400px}
th,td{border:1px solid var(--border);padding:0;position:relative}
th{background:#f4f5f7;min-width:100px}
td{min-width:100px}
th .cell-wrap,td .cell-wrap{display:flex;align-items:center}
th input,td input{width:100%;border:none;padding:8px 10px;font-size:14px;font-family:inherit;background:transparent;outline:none}
th input{font-weight:600}
td input:focus,th input:focus{background:#e6f0ff}
th .col-actions{display:flex;flex-direction:column;gap:1px;padding-right:2px;opacity:0;transition:opacity .15s}
th:hover .col-actions{opacity:1}
.col-action-btn{background:none;border:none;cursor:pointer;padding:2px 4px;color:var(--text-sub);font-size:11px;line-height:1;border-radius:2px}
.col-action-btn:hover{background:var(--border)}
.col-action-btn:focus-visible{outline:2px solid var(--focus)}
.align-indicator{font-size:10px;padding:2px 4px;cursor:pointer;background:none;border:none;color:var(--text-sub);border-radius:2px}
.align-indicator:hover{background:var(--border)}
.align-indicator:focus-visible{outline:2px solid var(--focus)}
th .resize-handle{position:absolute;right:-3px;top:0;bottom:0;width:6px;cursor:col-resize;z-index:2}
th .resize-handle:hover{background:var(--focus)}
.row-num{width:36px;min-width:36px;max-width:36px;background:#f4f5f7;text-align:center;font-size:12px;color:var(--text-sub);cursor:default;user-select:none}
.row-delete{width:28px;min-width:28px;max-width:28px;text-align:center}
.row-delete button{background:none;border:none;cursor:pointer;color:var(--text-sub);font-size:14px;padding:4px;border-radius:2px;opacity:0;transition:opacity .15s}
tr:hover .row-delete button{opacity:1}
.row-delete button:hover{color:var(--danger);background:#ffebe6}
.row-delete button:focus-visible{outline:2px solid var(--focus);opacity:1}
.output-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.output-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border);background:#f4f5f7}
.output-header h2{font-size:16px;font-weight:600}
#markdown-output{padding:16px;font-size:13px;font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;white-space:pre;overflow-x:auto;min-height:60px;color:var(--text)}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:100}
.modal-content{background:var(--surface);border-radius:8px;padding:24px;width:90%;max-width:560px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.modal-content h3{margin-bottom:12px;font-size:18px}
.modal-content textarea{width:100%;border:1px solid var(--border);border-radius:var(--radius);padding:10px;font-size:13px;font-family:"SFMono-Regular",Consolas,monospace;resize:vertical}
.modal-content textarea:focus{outline:2px solid var(--focus);border-color:var(--focus)}
.modal-actions{display:flex;gap:8px;margin-top:12px;justify-content:flex-end}
.copied-toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--text);color:#fff;padding:8px 20px;border-radius:20px;font-size:14px;z-index:200;animation:fadeInOut 1.6s forwards}
@keyframes fadeInOut{0%{opacity:0;transform:translateX(-50%) translateY(10px)}15%{opacity:1;transform:translateX(-50%) translateY(0)}85%{opacity:1}100%{opacity:0}}
@media(max-width:600px){
  #app{padding:12px}
  h1{font-size:22px}
  .toolbar{flex-direction:column}
  .btn span{display:none}
  .btn svg{margin:0}
}