:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-2: #f8f9fb;
  --border: #d9dde3;
  --text: #1c2128;
  --muted: #5b6573;
  --accent: #2f6feb;
  --accent-text: #ffffff;
  --accent-soft: #e6efff;
  --danger: #c0392b;
  --ok: #1f8a4c;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.1);
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --panel: #171b21;
    --panel-2: #1d222a;
    --border: #2c333d;
    --text: #e6e9ee;
    --muted: #98a2b3;
    --accent: #5b8def;
    --accent-text: #ffffff;
    --accent-soft: #1b2a45;
    --danger: #ef6a5a;
    --ok: #3ddc84;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: var(--font);
  font-size: 17.88px;
  line-height: 1.4;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;           /* the page itself never scrolls on desktop; columns scroll if they must */
}
a { color: var(--accent); }
code, .mono { font-family: var(--mono); }
button { font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }

/* ---------- header with the actions ---------- */
.app-header {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.brand h1 { margin: 0; font-size: 22px; font-weight: 650; letter-spacing: -0.01em; white-space: nowrap; }
.brand .tagline { color: var(--muted); font-size: 17.18px; white-space: nowrap; }
.toolbar { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; justify-content: flex-end; }
.toolbar .summary { font-size: 16.5px; color: var(--muted); text-align: right; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.toolbar .btn { flex: none; white-space: nowrap; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 13px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel-2); cursor: pointer; font-weight: 600;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.07); }
.btn.primary.invalid { background: var(--danger); border-color: var(--danger); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; filter: none; }
.btn.small { padding: 5px 10px; font-size: 16.5px; font-weight: 500; }
.btn.tiny { padding: 2px 8px; font-size: 15.13px; font-weight: 500; }

/* ---------- three columns of cards ---------- */
.app-main {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 10px 18px;
  margin: 0;
}
.col { display: flex; flex-direction: column; gap: 10px; min-height: 0; overflow: auto; }
@media (max-width: 1100px) {
  body { height: auto; overflow: auto; }
  .app-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col { overflow: visible; }
}
@media (max-width: 720px) {
  .app-main { grid-template-columns: 1fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  flex: none;
}
.card-head {
  padding: 6px 12px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.card-head .hint { font-weight: 400; color: var(--muted); font-size: 15.82px; }
.card-body { padding: 8px 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; align-content: start; }
.card-body .wide, .card-body .field.wide { grid-column: 1 / -1; }

/* ---------- fields ---------- */
.field { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.field.sub { padding-left: 22px; }
.field label { font-size: 15.82px; font-weight: 600; display: flex; justify-content: space-between; align-items: baseline; gap: 6px; }
.field label .auto { font-weight: 400; font-size: 14.43px; color: var(--muted); }
.field input[type="text"], .field select, .field textarea, .select-custom input[type="text"] {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--panel-2);
  outline: none;
  min-width: 0;
  font-size: 17.18px;
}
.field input:focus, .field select:focus, .field textarea:focus, .select-custom input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.field.invalid input, .field.invalid select { border-color: var(--danger); }
.field textarea { resize: vertical; min-height: 38px; }
.field .help { font-size: 15.13px; color: var(--muted); }
.field .help[hidden] { display: none; }
.field .error { font-size: 15.13px; color: var(--danger); }
.field .error:empty { display: none; }
.field .with-button { display: flex; gap: 5px; }
.field .with-button input, .field .with-button select { flex: 1; }
.field .reset-auto { border: 1px solid var(--border); background: var(--panel-2); border-radius: 7px; padding: 0 8px; cursor: pointer; color: var(--muted); }
.field .reset-auto:hover { color: var(--text); border-color: var(--accent); }
.select-custom { display: flex; flex-direction: column; gap: 5px; }
.field select option.tpl { font-weight: 600; }
.inline-check { display: flex; align-items: center; justify-content: flex-start !important; gap: 6px; font-size: 15.13px; color: var(--muted); cursor: pointer; font-weight: 400 !important; white-space: nowrap; }
.inline-check input { accent-color: var(--accent); margin: 0; }

/* ---------- toggles ---------- */
.toggle {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 4px 9px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); cursor: pointer; min-width: 0;
}
.toggle input { margin: 0; width: 14px; height: 14px; accent-color: var(--accent); flex: none; }
.toggle .t-label { font-weight: 600; font-size: 17.18px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.toggle .t-note { flex-basis: 100%; font-size: 15.13px; }
.toggle.disabled { opacity: 0.55; cursor: not-allowed; }

/* ---------- loader chips ---------- */
.loader-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.loader-chip {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 6px 4px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); cursor: pointer; text-align: center; min-width: 0;
}
.loader-chip input { accent-color: var(--accent); width: 14px; height: 14px; margin: 0 0 2px; }
.loader-chip .name { font-weight: 600; }
.loader-chip .ver { font-size: 14.43px; color: var(--muted); font-family: var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.loader-chip.on { border-color: var(--accent); background: var(--accent-soft); }
.loader-chip.unsupported { opacity: 0.6; cursor: not-allowed; border-style: dashed; background: var(--panel-2); }
.loader-chip.unsupported input { cursor: not-allowed; }
.loader-error { grid-column: 1 / -1; color: var(--danger); font-size: 15.13px; }
.loader-error:empty { display: none; }
.unsupported-note { color: var(--danger) !important; font-family: var(--font) !important; }

/* ---------- assets ---------- */
.asset { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.asset label { font-size: 16.5px; min-width: 0; overflow-wrap: anywhere; }
.asset .drop { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border: 1px dashed var(--border); border-radius: 8px; background: var(--panel-2); }
.asset .drop img { width: 32px; height: 32px; image-rendering: pixelated; border-radius: 4px; object-fit: contain; }
.asset .drop .meta { font-size: 15.13px; color: var(--muted); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.asset input[type="file"] { font-size: 15.82px; max-width: 100%; }
.asset .remove { border: 1px solid var(--border); background: transparent; border-radius: 6px; padding: 1px 7px; cursor: pointer; font-size: 15.13px; }

/* ---------- version list status (inside the card head) ---------- */
.versions-status { display: inline-flex; align-items: center; gap: 6px; font-size: 15.13px; font-weight: 400; color: var(--muted); }
.versions-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: none; }
.versions-status.live .dot { background: var(--ok); }
.versions-status.error .dot { background: var(--danger); }
.versions-status.loading .dot { background: var(--accent); animation: pulse 1s infinite alternate; }
@keyframes pulse { from { opacity: 0.3; } to { opacity: 1; } }

/* ---------- footer ---------- */
.app-footer { flex: none; padding: 6px 18px 8px; color: var(--muted); font-size: 15.13px; display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: center; }
.app-footer .links { margin-left: auto; display: flex; gap: 12px; }

.toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 8px; font-size: 17.88px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.toast.show { opacity: 1; }

/* low windows (laptops): trim the outer spacing so the three columns still fit without scrolling */
@media (max-height: 820px) and (min-width: 1101px) {
  .app-main { padding: 6px 14px; gap: 10px; }
  .col { gap: 8px; }
  .app-header { padding: 5px 14px; }
  .app-footer { padding: 3px 14px 4px; }
  .card-head { padding: 4px 12px; }
  .card-body { padding: 6px 12px; gap: 4px 10px; }
  .field input[type="text"], .field select, .field textarea, .select-custom input[type="text"] { padding: 3px 8px; }
  .toggle { padding: 2px 9px; }
  .loader-chip { padding: 4px 4px; gap: 0; }
  .asset .drop { padding: 3px 8px; }
  .field textarea { min-height: 34px; }
}