:root {
  --bg: #0f1115;
  --panel: #181b22;
  --panel-2: #20242d;
  --line: #2c313c;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #6ea8fe;
  --accent-2: #4d7ce0;
  --danger: #e06a6a;
  --ok: #5fc88f;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Thai", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 14px;
  position: sticky;
  top: 0;
  background: rgba(15, 17, 21, .92);
  backdrop-filter: blur(6px);
  z-index: 10;
  flex-wrap: wrap;
}
header h1 { font-size: 17px; margin: 0; font-weight: 650; }
header .sub { color: var(--muted); font-size: 13px; }

.lang-switch { display: flex; gap: 4px; margin-left: auto; }
.lang {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  padding: 5px 10px; border-radius: 999px; cursor: pointer; font-size: 12.5px;
}
.lang.active { background: var(--panel-2); color: var(--text); border-color: var(--accent); }

.tabs { display: flex; gap: 6px; }
.tab {
  background: transparent; color: var(--muted); border: 1px solid transparent;
  padding: 8px 14px; border-radius: 999px; cursor: pointer; font-size: 14px;
}
.tab.active { background: var(--panel-2); color: var(--text); border-color: var(--line); }

main { max-width: 1080px; margin: 0 auto; padding: 22px 18px 80px; }
.view { display: none; }
.view.active { display: block; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

/* Manage sub-tabs */
.subtabs {
  display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px;
  border-bottom: 1px solid var(--line); padding-bottom: 12px;
}
.subtab {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: 9px; cursor: pointer; font-size: 14px;
  display: inline-flex; align-items: center; gap: 7px;
}
.subtab:hover { color: var(--text); border-color: var(--accent); }
.subtab.active { background: var(--accent-2); color: #fff; border-color: var(--accent-2); }
.subtab .count { font-size: 12px; opacity: .8; }
.subview { display: none; }
.subview.active { display: block; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.card h2 { margin: 0 0 14px; font-size: 15px; font-weight: 650; }
.card h2 .count { color: var(--muted); font-weight: 400; font-size: 13px; }

label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
input, select, textarea {
  width: 100%; padding: 9px 11px; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 9px; color: var(--text);
  font-size: 14px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; min-height: 64px; }

/* Make the native date picker usable on the dark theme:
   brighten the calendar icon and let a click anywhere on the field open it. */
input[type="date"] { cursor: pointer; color-scheme: dark; }
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.85) brightness(1.1);
  cursor: pointer;
  opacity: .85;
}
input[type="date"]::-webkit-calendar-picker-indicator:hover { opacity: 1; }
.row { display: flex; gap: 10px; }
.row > * { flex: 1; }

button {
  cursor: pointer; border: none; border-radius: 9px; font-size: 14px;
  padding: 9px 14px; font-family: inherit; font-weight: 550;
}
.btn { background: var(--accent-2); color: #fff; }
.btn:hover { background: var(--accent); }
.btn-ghost { background: var(--panel-2); color: var(--text); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-row { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }

.list { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; max-height: 360px; overflow: auto; }
.item {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px;
  padding: 10px 12px; display: flex; align-items: flex-start; gap: 10px;
}
.item .meta { flex: 1; min-width: 0; }
.item .meta .title { font-weight: 600; font-size: 14px; }
.item .meta .desc { color: var(--muted); font-size: 12.5px; word-break: break-word; }
.item .acts { display: flex; gap: 6px; flex-shrink: 0; }
.icon-btn {
  background: transparent; border: 1px solid var(--line); color: var(--muted);
  padding: 5px 9px; font-size: 12px; border-radius: 7px;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }
.icon-btn.del:hover { color: var(--danger); border-color: var(--danger); }

/* Backup bar */
.backup-bar {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 18px; margin-bottom: 18px; display: flex; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.backup-bar h2 { margin: 0; font-size: 14px; font-weight: 650; }
.backup-bar .hint { margin: 0; }

/* Generator */
.gen-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 820px) { .gen-grid { grid-template-columns: 1fr; } }
.member-picker {
  max-height: 280px; overflow: auto; border: 1px solid var(--line);
  border-radius: 9px; padding: 6px; background: var(--panel-2); margin-top: 10px;
}
.member-group-label {
  font-size: 12px; color: var(--muted); padding: 8px 8px 4px;
  text-transform: uppercase; letter-spacing: .04em;
}
.check { display: flex; align-items: center; gap: 9px; padding: 7px 8px; border-radius: 7px; cursor: pointer; }
.check:hover { background: var(--panel); }
.check input { width: auto; }
.output {
  white-space: pre-wrap; font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 13.5px; background: #0b0d11; border: 1px solid var(--line);
  border-radius: 9px; padding: 14px; min-height: 200px; margin-top: 12px;
}
.empty { color: var(--muted); font-size: 13px; padding: 8px 0; }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }

.app-footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 20px 16px 40px;
  border-top: 1px solid var(--line);
}

#toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  padding: 10px 18px; border-radius: 999px; font-size: 13.5px; opacity: 0;
  transition: all .25s; pointer-events: none; z-index: 50;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.ok { border-color: var(--ok); }
#toast.err { border-color: var(--danger); }