:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #14202b;
  --muted: #5b6b78;
  --line: #dde3e8;
  --accent: #0e7c86;
  --accent-dk: #0a5d65;
  --accent-soft: #e3f2f3;
  --danger: #b3261e;
  --null: #aeb8c0;
  --shadow: 0 1px 2px rgba(20, 32, 43, .06), 0 6px 20px rgba(20, 32, 43, .06);
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Masthead ---------------------------------------------------------------- */
.masthead {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dk) 100%);
  color: #fff;
  padding: 18px 0;
}
.masthead .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 14px; }
.logo { font-size: 34px; line-height: 1; }
.masthead h1 { margin: 0; font-size: 22px; letter-spacing: .2px; }
.tagline { margin: 2px 0 0; font-size: 13px; color: #d7eef0; }
.tagline strong { color: #fff; }
.ghlink {
  color: #fff; text-decoration: none; font-size: 13px; font-weight: 600;
  border: 1px solid rgba(255,255,255,.5); padding: 7px 12px; border-radius: 8px;
  white-space: nowrap;
}
.ghlink:hover { background: rgba(255,255,255,.12); }

/* Intro ------------------------------------------------------------------- */
main { padding-bottom: 60px; }
.intro { margin: 26px 0 18px; }
.intro p { margin: 0; color: var(--muted); max-width: 760px; }
.intro strong { color: var(--ink); }

/* Dropzone ---------------------------------------------------------------- */
.dropzone {
  background: var(--panel);
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  padding: 42px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
  outline: none;
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); background: #fbfdfd; }
.dropzone.over { border-color: var(--accent); background: var(--accent-soft); transform: scale(1.004); }
.dz-icon {
  width: 52px; height: 52px; margin: 0 auto 10px;
  display: grid; place-items: center;
  font-size: 24px; color: var(--accent);
  background: var(--accent-soft); border-radius: 50%;
}
.dz-title { margin: 0; font-size: 17px; font-weight: 600; }
.dz-sub { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.link {
  background: none; border: none; color: var(--accent); font: inherit;
  font-weight: 600; cursor: pointer; padding: 0; text-decoration: underline;
}
.link:hover { color: var(--accent-dk); }

/* Messages ---------------------------------------------------------------- */
.error {
  margin: 14px 0 0; padding: 10px 14px; border-radius: 8px;
  background: #fdecea; color: var(--danger); border: 1px solid #f3c9c5; font-size: 14px;
}
.status { margin: 14px 0 0; color: var(--muted); font-size: 14px; min-height: 20px; }

.progress { margin-top: 16px; display: flex; align-items: center; gap: 12px; }
.bar { flex: 1; height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--accent); transition: width .15s; }
.progress-label { font-size: 12px; color: var(--muted); white-space: nowrap; min-width: 90px; }

/* Controls ---------------------------------------------------------------- */
.controls {
  margin-top: 22px; padding: 18px; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start;
}
.control { display: flex; flex-direction: column; gap: 5px; }
.control label { font-weight: 600; font-size: 13px; }
.control select, .control input[type=text] {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; background: #fff; color: var(--ink);
}
.control select:disabled { background: #f2f4f6; color: var(--muted); }
.hint { font-size: 12px; color: var(--muted); }
.control-checks { justify-content: center; gap: 10px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; font-size: 14px; }
.downloads { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; border-top: 1px solid var(--line); margin-top: 2px; padding-top: 16px; }
.btn {
  padding: 9px 16px; border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 8px; font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-dk); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--accent-dk); color: #fff; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Stats ------------------------------------------------------------------- */
.stats { margin-top: 22px; display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.stats:empty { display: none; }
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; display: flex; flex-direction: column; gap: 2px;
}
.stat-val { font-size: 20px; font-weight: 700; }
.stat-key { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }

/* Preview ----------------------------------------------------------------- */
.preview-wrap { margin-top: 26px; }
.preview-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.preview-head h2 { margin: 0; font-size: 17px; }
.preview-note { font-size: 12px; color: var(--muted); }
.preview {
  margin-top: 10px; overflow: auto; max-height: 460px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
}
.preview table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
.preview th, .preview td {
  padding: 6px 10px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line);
  text-align: left; white-space: nowrap; max-width: 340px; overflow: hidden; text-overflow: ellipsis;
}
.preview thead th {
  position: sticky; top: 0; background: #eef3f4; color: var(--accent-dk);
  font-weight: 700; z-index: 1; border-bottom: 2px solid var(--line);
}
.preview tbody tr:nth-child(even) { background: #fafcfc; }
.preview td.null { color: var(--null); text-align: center; }

/* Guide ------------------------------------------------------------------- */
.guide { margin-top: 36px; padding: 22px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.guide h2 { margin: 0 0 12px; font-size: 17px; }
.guide-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.guide h3 { margin: 0 0 8px; font-size: 14px; color: var(--accent-dk); }
.guide ol { margin: 0; padding-left: 18px; color: var(--muted); }
.guide li { margin-bottom: 6px; }
.guide code { background: #eef3f4; padding: 1px 5px; border-radius: 4px; font-size: 12px; }

/* Footer ------------------------------------------------------------------ */
.foot { margin-top: 40px; padding: 22px 0; border-top: 1px solid var(--line); background: #fff; }
.foot p { margin: 0 0 6px; font-size: 12.5px; color: var(--muted); }
.foot a { color: var(--accent); }

/* Tabs -------------------------------------------------------------------- */
.tabs { display: flex; gap: 4px; margin: 20px 0 16px; border-bottom: 1px solid var(--line); }
.tab-btn {
  background: none; border: none; border-bottom: 3px solid transparent;
  padding: 10px 16px; font: inherit; font-weight: 600; color: var(--muted);
  cursor: pointer; margin-bottom: -1px;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--accent-dk); border-bottom-color: var(--accent); }

.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 6px 0 10px; }
.panel-head h2 { margin: 0; font-size: 18px; }
.panel-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.muted-pill { color: var(--muted); font-weight: 500; font-size: 12px; }

.btn.small { padding: 6px 11px; font-size: 13px; }
.dl-sep { width: 1px; align-self: stretch; background: var(--line); margin: 0 2px; }

/* Column config panel ----------------------------------------------------- */
.col-panel { grid-column: 1 / -1; border: 1px solid var(--line); border-radius: 10px; padding: 4px 12px; background: #fbfdfd; }
.col-panel > summary { cursor: pointer; font-weight: 600; padding: 8px 2px; }
.profile-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding: 6px 0 10px; }
.profile-msg { font-size: 12.5px; color: var(--accent-dk); }
.col-list { max-height: 280px; overflow: auto; display: flex; flex-direction: column; gap: 4px; padding-bottom: 8px; }
.col-row { display: grid; grid-template-columns: 24px 1fr 1fr auto; align-items: center; gap: 8px; padding: 3px 4px; border-radius: 6px; }
.col-row:hover { background: #eef3f4; }
.col-orig { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.col-rename { padding: 4px 7px; border: 1px solid var(--line); border-radius: 6px; font: inherit; font-size: 13px; }
.col-move { display: flex; gap: 2px; }
.iconbtn { border: 1px solid var(--line); background: #fff; border-radius: 5px; width: 24px; height: 24px; cursor: pointer; line-height: 1; font-size: 11px; color: var(--muted); }
.iconbtn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-dk); }
.iconbtn:disabled { opacity: .35; cursor: default; }

/* Quality report ---------------------------------------------------------- */
.rep-h { margin: 22px 0 8px; font-size: 15px; color: var(--accent-dk); }
.small { font-size: 12.5px; }
.cbar { display: inline-block; width: 80px; height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; vertical-align: middle; }
.cbar-fill { display: block; height: 100%; background: var(--accent); }
.cbar-num { margin-left: 8px; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 12px; }
.dist-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.dist { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.dist h4 { margin: 0 0 8px; font-size: 13px; }
.dist-row { display: grid; grid-template-columns: 1fr 70px auto; align-items: center; gap: 8px; margin-bottom: 4px; }
.dist-label { font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dist-track { height: 7px; background: var(--line); border-radius: 999px; overflow: hidden; }
.dist-fill { display: block; height: 100%; background: var(--accent); }
.dist-count { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; }

/* Compare ----------------------------------------------------------------- */
.cmp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 12px 0; }
.dropzone.mini { padding: 20px 16px; }
.dropzone.mini .dz-title { font-size: 15px; }
.diff-sec { margin-top: 14px; border: 1px solid var(--line); border-radius: 10px; padding: 4px 12px; background: var(--panel); }
.diff-sec > summary { cursor: pointer; font-weight: 600; padding: 8px 2px; }
.diff-sec .preview { margin: 8px 0 10px; max-height: 360px; }
.preview td.old { color: var(--danger); }
.preview td.new { color: var(--accent-dk); }

/* Masthead actions + "What's new" -------------------------------------------- */
.mast-actions { display: flex; align-items: center; gap: 10px; }
/* Match the transparent ".ghlink" anchor: reset the <button> default background/colour. */
.ghbtn { font: inherit; cursor: pointer; position: relative; background: transparent; color: #fff; }
.ghbtn.has-new::after {
  content: ""; position: absolute; top: -3px; right: -3px;
  width: 9px; height: 9px; border-radius: 50%; background: #ffd23f;
  border: 2px solid var(--accent-dk);
}

/* Changelog modal ----------------------------------------------------------- */
body.modal-open { overflow: hidden; }
.modal { position: fixed; inset: 0; z-index: 50; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(20, 32, 43, .5); }
.modal-box {
  position: relative; width: 100%; max-width: 560px; max-height: 85vh; display: flex; flex-direction: column;
  background: var(--panel); border-radius: var(--radius); box-shadow: 0 12px 40px rgba(20, 32, 43, .3);
  animation: modal-in .14s ease-out;
}
@keyframes modal-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-head h2 { margin: 0; font-size: 18px; }
.modal-x { border: none; background: none; font-size: 24px; line-height: 1; color: var(--muted); cursor: pointer; padding: 0 4px; border-radius: 6px; }
.modal-x:hover { color: var(--ink); background: var(--line); }
.modal-body { padding: 8px 20px 4px; overflow: auto; }
.modal-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 20px; border-top: 1px solid var(--line); }

.cl-list { list-style: none; margin: 0; padding: 0; }
.cl-entry { padding: 16px 0; border-bottom: 1px solid var(--line); }
.cl-entry:last-child { border-bottom: none; }
.cl-meta { display: flex; align-items: center; gap: 10px; }
.cl-ver { font-weight: 700; color: #fff; background: var(--accent); padding: 2px 9px; border-radius: 999px; font-size: 12.5px; }
.cl-date { font-size: 12.5px; color: var(--muted); }
.cl-title { margin: 8px 0 6px; font-size: 15px; }
.cl-items { margin: 0; padding-left: 18px; color: var(--ink); }
.cl-items li { margin-bottom: 4px; }

@media (max-width: 720px) {
  .controls, .guide-cols, .cmp-grid { grid-template-columns: 1fr; }
  .masthead .wrap { flex-direction: column; align-items: flex-start; }
  .col-row { grid-template-columns: 24px 1fr auto; }
  .col-rename { grid-column: 2 / 4; }
}