:root{
  --bg:#0e1621; --bg-card:#161b22; --border:#30363d; --text:#e6edf3;
  --muted:#8b949e; --accent:#58a6ff; --warn:#ff8c42; --ok:#3fb950; --alert:#f85149;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans",sans-serif;min-height:100vh}
.wrap{max-width:720px;margin:0 auto;padding:20px 14px 40px}
header h1{font-size:22px;margin:0 0 4px;border-bottom:1px solid var(--border);padding-bottom:8px}
.lead{color:var(--muted);font-size:13px;margin:6px 0 16px}

.card{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:14px;margin-bottom:16px}
.card h2{font-size:15px;margin:0 0 10px;color:var(--accent)}
.hint{color:var(--muted);font-size:11.5px;margin:0 0 8px}

label.block{display:block;margin-bottom:8px}
label.block span{display:block;font-size:12px;color:var(--muted);margin-bottom:3px}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid label{display:block}
.grid label.span2{grid-column:1/3}
.grid label span{display:block;font-size:12px;color:var(--muted);margin-bottom:3px}

input[type=text],input[type=number],input[type=datetime-local],input[type=file],textarea,input:not([type]){
  width:100%;background:#0a1118;color:var(--text);border:1px solid var(--border);
  border-radius:6px;padding:8px 10px;font-size:14px;font-family:inherit}
input:focus,textarea:focus{outline:none;border-color:var(--accent)}
input[type=file]{padding:6px 8px;font-size:13px}

.meta-box{margin-top:8px;padding:10px;background:#0a1118;border-radius:6px;font-size:12.5px;font-family:ui-monospace,monospace;color:var(--muted);white-space:pre-wrap}
.meta-box.ok{color:var(--ok)}
.meta-box.err{color:var(--alert)}

.table-scroll{overflow-x:auto;margin:8px -4px;padding:0 4px}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:12px}
th,td{padding:4px 5px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}
th{background:#0a1118;color:var(--muted);font-size:10.5px;font-weight:600;position:sticky;top:0}
td input{background:transparent;border:none;padding:4px;font-size:12px;color:var(--text);width:100%}
td input:focus{background:#0a1118;border-radius:4px}
td.num input{text-align:right;font-variant-numeric:tabular-nums}
.btn-del{background:transparent;color:var(--alert);border:none;cursor:pointer;padding:4px 6px;font-size:16px}

.target-row{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;margin-bottom:8px;padding:8px;background:#0a1118;border-radius:6px}
.target-row label{font-size:11.5px;color:var(--muted)}
.target-row input{font-size:13px;padding:6px 8px}

.btn-primary,.btn-sub{cursor:pointer;border:1px solid var(--border);border-radius:6px;padding:10px 14px;font-size:14px;font-family:inherit}
.btn-primary{background:var(--accent);color:#06101f;border-color:var(--accent);font-weight:700}
.btn-primary:hover{opacity:.9}
.btn-sub{background:#0a1118;color:var(--accent)}
.btn-sub:hover{background:#1f2937}
.actions{display:flex;justify-content:center;margin-top:14px;gap:10px}

#preview-frame{width:100%;height:560px;border:1px solid var(--border);border-radius:6px;background:#0a1118}

.url-row{display:flex;gap:8px;align-items:center;margin-top:8px;flex-wrap:wrap}
.url-row code{background:#0a1118;padding:8px 10px;border-radius:6px;font-size:11.5px;flex:1;min-width:0;overflow-wrap:anywhere;color:var(--accent);border:1px solid var(--border)}
.url-row .btn-sub{white-space:nowrap;text-decoration:none;display:inline-block}

footer{margin-top:24px;text-align:center;font-size:12px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--accent)}