:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel2: #eef0f3;
  --border: #d8dce3;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #2563eb;
  --green: #0e7a52;
  --amber: #9a6700;
  --danger: #dc2626;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header { padding: 20px 28px 8px; }
header h1 { margin: 0 0 4px; font-size: 25px; }
.tagline { margin: 0; color: var(--muted); font-size: 16px; max-width: 72ch; }
.tagline code { color: var(--green); }
.tagline strong { color: var(--text); }

.split {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(340px, 460px) 1fr;
  gap: 19px;
  padding: 19px 28px;
  min-height: 0;
}

.pane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: auto;
}

/* ---- form pane ---- */

.form-pane { padding: 19px; max-height: calc(100vh - 160px); }

.section {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 0 0 10px;
  overflow: hidden;
}
.section-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  user-select: none;
  background: var(--panel);
}
.section-head:hover { background: var(--panel2); }
.section-head:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.section.open > .section-head { border-bottom: 1px solid var(--border); background: var(--panel2); }
.chev { color: var(--muted); font-size: 15px; width: 16px; }
.section-title.off { color: var(--muted); font-weight: 500; }
.count-badge {
  margin-left: auto;
  font: 14px var(--mono);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1px 8px;
}
.section-body { padding: 6px 18px 16px; }

.ref-input.invalid { border-color: var(--danger) !important; }

.field { margin: 10px 0; }
.field > label {
  display: block;
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text);
}
.field input[type="text"],
.field input[type="number"],
.field select {
  width: 100%;
  padding: 7px 10px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 17px;
}
.field input:focus, .field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.help { margin: 4px 0 0; font-size: 15px; color: var(--muted); }

.toggle { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.toggle.small { font-size: 15px; color: var(--muted); }

.radio-row { display: flex; gap: 18px; flex-wrap: wrap; }
.radio { display: inline-flex; align-items: center; gap: 5px; font-size: 16px; cursor: pointer; }

/* ---- secret refs palette + drop zones ---- */

.env-prefix { color: var(--muted); font-family: var(--mono); font-size: 16px; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #e8effc;
  border: 1px solid var(--accent);
  font: 16px var(--mono);
  border-radius: 18px;
  padding: 3px 6px 3px 16px;
  cursor: grab;
  user-select: none;
  max-width: 100%;
}
.chip:active { cursor: grabbing; }
.chip.in-field { cursor: default; padding-right: 6px; }
.chip.in-field.env { color: var(--green); }

.chip-name { color: var(--amber); font-weight: 600; }
.chip-eq { color: var(--muted); }
.chip-src {
  color: var(--muted);
  font-size: 14px;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chip-x {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 50%;
}
.chip-x:hover { color: var(--danger); background: #00000010; }

.ref-add { display: flex; align-items: center; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.ref-add input.ref-input {
  padding: 5px 8px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: 16px var(--mono);
}
.ref-add input.ref-input.name { width: 150px; color: var(--amber); }
.ref-add input.ref-input.src { flex: 1; min-width: 220px; color: var(--green); }
.add-btn {
  margin-left: 8px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  padding: 5px 18px;
  cursor: pointer;
}
.add-btn:hover { border-color: var(--accent); }

.secret-assign { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.dropzone {
  flex: 1;
  min-width: 220px;
  min-height: 36px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--panel2);
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--green); background: #0e7a521a; }
.dropzone.filled { border-style: solid; }
.drop-hint { color: var(--muted); font-size: 15px; font-style: italic; }

.zone-actions {
  margin-left: auto;
  display: inline-flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.12s;
}
.dropzone:hover .zone-actions,
.dropzone:focus-within .zone-actions { opacity: 1; }
.icon-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 7px;
  border-radius: 6px;
}
.icon-btn:hover { color: var(--accent); border-color: var(--border); background: #00000008; }
.icon-btn.danger:hover { color: var(--danger); }

/* ---- agent env editor ---- */

.env-rows { display: flex; flex-direction: column; gap: 6px; margin: 6px 0; }
.env-row { display: flex; align-items: center; gap: 6px; }
.env-row input.env-key {
  width: 30%;
  padding: 6px 8px;
  background: var(--panel2);
  color: var(--amber);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: 15px var(--mono);
}
.env-row input.env-val {
  flex: 1;
  padding: 6px 8px;
  background: var(--panel2);
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: 15px var(--mono);
}
.env-row input.env-val.dragover { border-color: var(--green); background: #0e7a521a; }
.env-row .env-ref-pick {
  width: 52px;
  padding: 5px 4px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
}
.env-row .icon-btn {
  opacity: 0;
  transition: opacity 0.12s;
}
.env-row:hover .icon-btn,
.env-row:focus-within .icon-btn { opacity: 1; }

.ref-picker {
  max-width: 46%;
  padding: 6px 8px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: 15px var(--mono);
  cursor: pointer;
}
.ref-picker:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.badge.required {
  font-size: 14px;
  color: #b45309;
  border: 1px solid #b4530966;
  border-radius: 10px;
  padding: 1px 8px;
  margin-left: 8px;
  white-space: nowrap;
}
.lock { font-size: 15px; }

.key-hint {
  font: 14px var(--mono);
  color: var(--muted);
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 5px;
  margin-left: 8px;
  vertical-align: middle;
}

/* ---- header / language switcher ---- */

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 19px;
}
.header-actions { display: flex; align-items: center; gap: 10px; }
.profile-bar { display: flex; align-items: center; gap: 4px; }
.profile-bar select {
  height: 38px;
  padding: 0 8px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  max-width: 180px;
  cursor: pointer;
}
.reset-btn {
  height: 38px;
  background: var(--panel);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 13px;
  font-size: 15px;
  cursor: pointer;
}
.reset-btn:hover { color: var(--danger); border-color: var(--danger); }

.lang-switch {
  display: flex;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-btn {
  background: var(--panel);
  color: var(--muted);
  border: none;
  padding: 0 18px;
  font-size: 16px;
  cursor: pointer;
}
.lang-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ---- preview pane ---- */

.preview-pane {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 160px);
  position: relative;
}

.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  padding: 8px 16px 0;
}
.tab {
  background: none;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--muted);
  font: 16px var(--mono);
  padding: 7px 18px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
}
.tab.active {
  color: var(--text);
  background: var(--panel2);
  border-color: var(--border);
}

.preview-actions {
  position: absolute;
  top: 6px;
  right: 16px;
  display: flex;
  gap: 8px;
}
.preview-actions button {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  padding: 5px 16px;
  cursor: pointer;
}
.preview-actions button:hover { border-color: var(--accent); }

#preview {
  flex: 1;
  margin: 0;
  padding: 19px 18px;
  overflow: auto;
  background: var(--panel2);
  border-radius: 0 0 10px 10px;
}
#preview code {
  font: 16px/1.6 var(--mono);
  color: var(--text);
  white-space: pre;
}

/* TOML syntax tokens (light theme) */
.tok-comment { color: #8a919c; font-style: italic; }
.tok-section { color: #7c3aed; font-weight: 600; }
.tok-key { color: #0550ae; }
.tok-string { color: var(--green); }
.tok-interp { color: var(--amber); font-weight: 600; }
.tok-bool { color: #cf222e; }
.tok-num { color: #b35900; }

footer {
  padding: 8px 28px 19px;
  color: var(--muted);
  font-size: 15px;
}
footer a { color: var(--accent); }

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .form-pane, .preview-pane { max-height: none; }
}