:root {
  --bg:#f4f5f8; --panel:#ffffff; --line:#e7e9ee; --line2:#eef0f4;
  --fg:#15171c; --mut:#6b6f78; --soft:#9aa0aa;
  --acc:#6d4aff; --acc2:#8b6dff; --acc-soft:#f1edff; --acc-soft2:#e7e0ff;
  --ok:#0fae6e; --err:#e5484d;
  --shadow-sm:0 1px 2px rgba(20,22,30,.05);
  --shadow:0 1px 3px rgba(20,22,30,.06), 0 10px 30px rgba(20,22,30,.07);
}
* { box-sizing:border-box; }
html, body { margin:0; height:100%; overflow-x:hidden; max-width:100%; }
body {
  font-family:'Noto Sans Thai',-apple-system,'Segoe UI',Roboto,sans-serif;
  background:var(--bg); color:var(--fg); line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

/* ===== topbar ===== */
.topbar { display:flex; align-items:center; gap:12px; padding:16px 28px;
  background:var(--panel); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:10; }
.logo { display:inline-flex; align-items:center; gap:11px; font-size:19px; font-weight:800; letter-spacing:-.02em; }
.logo .ic { width:38px; height:38px; border-radius:11px; object-fit:cover; box-shadow:0 4px 12px rgba(109,74,255,.35); }
.logo .sub { font-size:11px; font-weight:600; color:#fff; background:linear-gradient(135deg,var(--acc),var(--acc2));
  padding:2px 8px; border-radius:99px; letter-spacing:.04em; }
.topbar .spacer { flex:1; }
.topbar .badge { font-size:12px; color:var(--mut); display:flex; align-items:center; gap:6px;
  background:var(--bg); border:1px solid var(--line); padding:6px 12px; border-radius:99px; }
.topbar .dot { width:7px; height:7px; border-radius:50%; background:var(--ok); box-shadow:0 0 0 3px rgba(15,174,110,.15); }

/* login area (topbar) */
#loginArea { display:flex; align-items:center; gap:8px; }

/* ===== layout ===== */
.studio { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:24px; max-width:1180px; margin:0 auto; padding:28px; align-items:start; }
.panel { background:var(--panel); border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); }
.panel-head { padding:18px 22px; border-bottom:1px solid var(--line2); }
.panel-head h2 { margin:0; font-size:15px; font-weight:700; display:flex; align-items:center; gap:8px; }
.panel-head p { margin:4px 0 0; font-size:12.5px; color:var(--mut); }
.panel-body { padding:22px; }
.right-col { position:sticky; top:96px; }

/* ===== form fields ===== */
.field { margin-top:22px; }
.field:first-child { margin-top:0; }
.seclabel { display:block; font-size:13px; font-weight:700; color:var(--fg); margin-bottom:10px; }
.subfield { display:block; font-size:13px; font-weight:600; color:var(--fg); }
.subfield > input { margin-top:6px; }
.hint { font-weight:400; color:var(--soft); font-size:11.5px; }

.drop { border:2px dashed var(--line); border-radius:14px; padding:30px 18px; text-align:center;
  cursor:pointer; transition:.18s; background:#fbfbfd; }
.drop:hover, .drop.over { border-color:var(--acc); background:var(--acc-soft); transform:translateY(-1px); }
.drop .big { font-size:26px; margin-bottom:8px; }
.drop .t1 { font-size:14.5px; font-weight:600; }
.drop .t2 { font-size:12px; color:var(--soft); margin-top:3px; }
.drop p { margin:6px 0 0; }
.link { background:none; border:0; color:var(--acc); cursor:pointer; font:inherit; font-weight:700; text-decoration:underline; padding:0; }
.muted { color:var(--soft); font-size:12.5px; }

input[type=text], input[type=password], textarea, select {
  width:100%; padding:11px 13px; background:#fff; border:1px solid var(--line);
  border-radius:11px; color:var(--fg); font-size:14px; font-family:inherit; transition:.15s;
}
input:focus, textarea:focus, select:focus { outline:none; border-color:var(--acc); box-shadow:0 0 0 3px var(--acc-soft); }
textarea { resize:vertical; min-height:46px; margin-top:8px; }
input[type=file] { display:none; }
small { color:var(--soft); font-size:11px; display:block; margin-top:5px; }

details { margin-top:0; }
summary { cursor:pointer; color:var(--acc); font-size:13px; font-weight:600; }

/* source / output video */
#srcVideo, #outVideo { width:100%; max-height:420px; border-radius:14px; margin-top:12px; background:#000;
  object-fit:contain; display:none; }
#srcVideo[src], #outVideo[src] { display:block; }
img#outThumb { display:none; border-radius:12px; margin-top:10px; }
img#outThumb[src] { display:inline-block; max-width:160px; }

/* ===== toggles (switch) ===== */
.toggle { display:flex; align-items:center; gap:10px; cursor:pointer; padding:7px 0; }
.toggle input { display:none; }
.sw { width:42px; height:24px; border-radius:99px; background:var(--line); position:relative; transition:.2s; flex-shrink:0; }
.sw::after { content:''; position:absolute; top:3px; left:3px; width:18px; height:18px; border-radius:50%;
  background:#fff; box-shadow:0 1px 3px rgba(0,0,0,.2); transition:.2s; }
.toggle input:checked + .sw { background:var(--acc); }
.toggle input:checked + .sw::after { transform:translateX(18px); }
.toggle .lbl { font-size:14px; font-weight:500; }

/* ===== primary button ===== */
.go { width:100%; margin-top:24px; padding:14px; border:0; border-radius:13px;
  background:linear-gradient(135deg,var(--acc),var(--acc2)); color:#fff; font-size:15.5px;
  font-weight:700; font-family:inherit; cursor:pointer; transition:.15s;
  box-shadow:0 6px 18px rgba(109,74,255,.32); }
.go:hover:not(:disabled) { transform:translateY(-1px); box-shadow:0 10px 24px rgba(109,74,255,.42); }
.go:disabled { background:var(--line); color:var(--soft); box-shadow:none; cursor:not-allowed; }
.enginehint { font-size:11.5px; color:var(--soft); margin:10px 0 0; text-align:center; }

/* ===== steps ===== */
.steps { list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:7px; }
.steps:empty { display:none; }
.steps li { display:flex; align-items:center; gap:10px; font-size:13.5px; padding:9px 12px;
  border-radius:10px; background:var(--bg); border:1px solid transparent; transition:.15s; }
.steps li .ico { width:18px; text-align:center; flex:none; font-weight:700; }
.steps li .lbl { flex:1; }
.steps li.pending { color:var(--soft); }
.steps li.active { color:var(--fg); background:var(--acc-soft); border-color:var(--acc); font-weight:600; }
.steps li.done { color:var(--ok); }
.steps li.error { color:var(--err); border-color:var(--err); background:#fef2f2; }
.steps li .t { margin-left:auto; font-size:11.5px; color:var(--soft); }

/* ===== result ===== */
.result-wrap { margin-top:18px; }
.hidden { display:none; }
.result-meta { margin-top:12px; font-size:13.5px; }
.result-meta p { margin:5px 0; }
.dl { display:flex; gap:10px; margin:12px 0; flex-wrap:wrap; }
.btn { display:inline-block; background:#fff; border:1px solid var(--line); color:var(--fg);
  padding:9px 14px; border-radius:11px; text-decoration:none; font-size:13.5px; font-weight:600; transition:.13s; }
.btn:hover { border-color:var(--acc); color:var(--acc); }
pre { background:#fafbfd; border:1px solid var(--line); border-radius:10px; padding:12px; overflow:auto;
  font-size:12px; white-space:pre-wrap; word-break:break-word; max-height:300px; color:var(--fg); }
.log { font-size:11px; color:var(--mut); max-height:340px; }

/* ===== โพสต์ขึ้นเพจ (postBox — render โดย app.js) ===== */
.postbox { margin-top:18px; border-top:1px solid var(--line); padding-top:16px; }
.postbox h3 { margin:0 0 12px; font-size:15px; font-weight:700; }
.postbox label { display:block; font-size:13px; font-weight:700; margin:12px 0 5px; color:var(--fg); }
.postbox .hint2 { font-weight:400; color:var(--soft); font-size:11.5px; }
.postbox textarea, .postbox input[type=text] {
  width:100%; background:#fff; border:1px solid var(--line); border-radius:11px;
  color:var(--fg); padding:10px 12px; font-size:13.5px; font-family:inherit; resize:vertical; }
.postbox textarea:focus, .postbox input:focus { outline:none; border-color:var(--acc); box-shadow:0 0 0 3px var(--acc-soft); }
.ppages { display:flex; flex-wrap:wrap; gap:8px; margin:12px 0; }
.pchip { display:flex; align-items:center; gap:7px; padding:6px 12px 6px 7px;
  border:1.5px solid var(--line); border-radius:999px; background:#fff; color:var(--fg);
  cursor:pointer; font-size:13px; font-weight:600; font-family:inherit; max-width:180px; transition:.12s; }
.pchip span { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.pchip img { width:24px; height:24px; border-radius:50%; object-fit:cover; flex:none; background:var(--line); }
.pchip:hover { border-color:var(--acc-soft2); }
.pchip.sel { border-color:var(--acc); background:var(--acc-soft); color:var(--acc); box-shadow:0 0 0 1px var(--acc); }
.pchip.sel::after { content:"✓"; margin-left:2px; }
.prow { display:flex; gap:10px; margin-top:14px; }
.btn-sec { flex:1; padding:12px; border:1px solid var(--line); border-radius:11px;
  background:#fff; color:var(--fg); cursor:pointer; font-size:13.5px; font-weight:600; font-family:inherit; transition:.13s; }
.btn-sec:hover { border-color:var(--acc); color:var(--acc); }
.btn-fb { flex:2; padding:12px; border:0; border-radius:11px; background:#1877f2; color:#fff;
  cursor:pointer; font-size:14px; font-weight:700; font-family:inherit; transition:.15s;
  box-shadow:0 4px 14px rgba(24,119,242,.28); }
.btn-fb:hover:not(:disabled) { background:#1568d8; box-shadow:0 6px 18px rgba(24,119,242,.4); }
.btn-fb:disabled { opacity:.55; cursor:default; box-shadow:none; }
.pmsg { font-size:13px; margin-top:11px; padding:10px 12px; border-radius:10px; display:none; }
.pmsg.ok { background:#ecfdf5; color:#059669; display:block; }
.pmsg.err { background:#fef2f2; color:var(--err); display:block; }

/* ===== history ===== */
.hist-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(96px,1fr)); gap:12px; }
.hist-item { position:relative; border-radius:12px; overflow:hidden; border:1px solid var(--line);
  background:#000; aspect-ratio:9/16; cursor:pointer; transition:.15s; }
.hist-item:hover { transform:translateY(-2px); box-shadow:var(--shadow); border-color:var(--acc-soft2); }
.hist-item video { width:100%; height:100%; object-fit:cover; display:block; }
.hist-item .play { position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:34px; height:34px; border-radius:50%; background:rgba(255,255,255,.92); display:grid; place-items:center;
  font-size:13px; color:var(--acc); opacity:0; transition:.15s; }
.hist-item:hover .play { opacity:1; }
.hist-item .del { position:absolute; top:6px; right:6px; width:24px; height:24px; border-radius:7px;
  background:rgba(0,0,0,.55); color:#fff; border:0; cursor:pointer; font-size:13px; line-height:1;
  opacity:0; transition:.15s; display:grid; place-items:center; }
.hist-item:hover .del { opacity:1; }
.hist-item .del:hover { background:var(--err); }
.hist-empty { text-align:center; color:var(--soft); font-size:13px; padding:24px 0; }

/* video modal */
.modal { position:fixed; inset:0; background:rgba(10,11,15,.72); display:none; z-index:50;
  align-items:center; justify-content:center; padding:24px; backdrop-filter:blur(4px); }
.modal.open { display:flex; }
.modal video { max-width:380px; width:100%; max-height:80vh; border-radius:16px; background:#000; }
.modal .close { position:absolute; top:20px; right:24px; color:#fff; font-size:30px; cursor:pointer;
  line-height:1; opacity:.8; } .modal .close:hover { opacity:1; }

.footnote { text-align:center; color:var(--soft); font-size:12px; padding:8px 0 32px; }

/* ===== responsive ===== */
@media (max-width:880px) {
  .studio { grid-template-columns:1fr; gap:20px; padding:16px; }
  .right-col { position:static; }
  .topbar { padding:12px 16px; }
}
@media (max-width:560px) {
  .studio { padding:12px; }
  .topbar { flex-wrap:wrap; gap:8px; padding:12px 14px; }
  .topbar .badge { font-size:11px; padding:4px 8px; }
}