:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e1e4ea;
  --text: #1a1d23;
  --muted: #667085;
  --accent: #0f9d58;
  --accent-hover: #0c8349;
  --accent-soft: #e3f5ec;
  --danger: #d92d20;
  --danger-soft: #fdecea;
  --warn: #b54708;
  --warn-soft: #fef4e6;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --surface: #1a1e24;
    --surface-2: #232830;
    --border: #2e343d;
    --text: #e8eaee;
    --muted: #98a2b3;
    --accent: #34c27a;
    --accent-hover: #4fd08e;
    --accent-soft: #173426;
    --danger: #f97066;
    --danger-soft: #3a1c1a;
    --warn: #fdb022;
    --warn-soft: #36290f;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif;
}

h1 { margin: 0; font-size: 22px; }
h2 { margin: 0 0 4px; font-size: 16px; }
p { margin: 0; }
.muted { color: var(--muted); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: Consolas, "Cascadia Mono", monospace; font-size: 13px; }

/* Layout */
.app { display: grid; grid-template-columns: 232px 1fr; min-height: 100vh; }

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 20px 14px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 0 6px; }
.brand small { display: block; color: var(--muted); font-size: 12px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  padding: 9px 12px;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--muted);
  font: inherit;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); }

.connections { margin-top: auto; display: flex; flex-direction: column; gap: 8px; padding: 0 6px; font-size: 13px; }
.conn { display: flex; align-items: center; gap: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); flex: none; }
.dot.ok { background: var(--accent); }

.main { padding: 28px 32px 48px; min-width: 0; }
.view { display: flex; flex-direction: column; gap: 18px; }
.view[hidden] { display: none; }

.topbar { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Cards & stats */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.stat { padding: 14px 16px; }
.stat-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 20px; font-weight: 600; margin-top: 2px; display: flex; align-items: center; gap: 8px; }
.stat-detail { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--surface-2); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.sub { color: var(--muted); font-size: 12px; }
.empty { padding: 36px 14px; text-align: center; color: var(--muted); }
.row-actions { display: flex; gap: 6px; justify-content: flex-end; white-space: nowrap; }
.error-text { color: var(--danger); max-width: 380px; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  background: var(--surface-2);
  color: var(--muted);
}
.badge.success { background: var(--accent-soft); color: var(--accent); }
.badge.failed { background: var(--danger-soft); color: var(--danger); }
.badge.running { background: var(--warn-soft); color: var(--warn); }
.badge.running::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Buttons */
.btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.danger { color: var(--danger); }
.icon-btn { border: 0; background: none; color: var(--muted); font-size: 22px; line-height: 1; cursor: pointer; padding: 2px 6px; border-radius: 6px; }
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* Toggle */
.switch { position: relative; display: inline-block; width: 36px; height: 20px; }
.switch input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch span { position: absolute; inset: 0; border-radius: 999px; background: var(--border); transition: background 0.15s; pointer-events: none; }
.switch span::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform 0.15s; }
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(16px); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Forms */
label, .field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; font-weight: 500; }
.field-label { font-size: 13px; font-weight: 500; }
input:not([type="checkbox"]), select, textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 400;
  width: 100%;
}
textarea { resize: vertical; font-family: Consolas, "Cascadia Mono", monospace; font-size: 13px; }
input:focus-visible, select:focus-visible, textarea:focus-visible, .btn:focus-visible, .nav-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
label.check { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; }
.actions select { width: auto; }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px 14px; margin: 0; display: flex; flex-direction: column; gap: 12px; align-items: stretch; }
fieldset > .btn { align-self: flex-start; }
legend { padding: 0 6px; font-weight: 600; font-size: 13px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label[hidden] { display: none; }

.columns { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: 8px; max-height: 260px; overflow-y: auto; }
.columns:empty { display: none; }
.column-row { display: grid; grid-template-columns: auto minmax(0, 1fr) minmax(0, 1fr) auto; align-items: center; gap: 10px; padding: 6px 10px; border-bottom: 1px solid var(--border); font-weight: 400; }
.column-row:last-child { border-bottom: 0; }
.column-row.off { opacity: 0.55; }
.column-field { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.column-row input[type="text"] { padding: 4px 8px; }
.column-move { display: flex; gap: 2px; }
.column-move .icon-btn { font-size: 12px; padding: 4px 6px; }

.form-card { padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; max-width: 620px; }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 18px; align-items: start; }
.settings-grid .form-card { max-width: none; }
.form-actions { display: flex; gap: 8px; justify-content: flex-end; }
.form-error { color: var(--danger); background: var(--danger-soft); padding: 8px 12px; border-radius: 8px; }
.copy-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; background: var(--surface-2); border-radius: 8px; }
a.btn { text-decoration: none; display: inline-block; }
a.btn.primary { color: #fff; }
.btn[hidden] { display: none; }
.copy-row code { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 400; }

/* Dialogs */
dialog {
  width: min(600px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  overflow: hidden;
}
dialog.wide { width: min(980px, calc(100vw - 32px)); }
dialog[open] { display: flex; flex-direction: column; }
dialog::backdrop { background: rgba(10, 12, 16, 0.5); }
dialog form { display: flex; flex-direction: column; min-height: 0; }
.dialog-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.dialog-head h2 { margin: 0; }
.dialog-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 14px; overflow-y: auto; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--border); }

/* Toasts */
.toasts { position: fixed; right: 20px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast { padding: 10px 14px; border-radius: 8px; background: var(--text); color: var(--bg); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2); max-width: 360px; }
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; align-items: center; flex-wrap: wrap; gap: 12px; padding: 12px 16px; border-right: 0; border-bottom: 1px solid var(--border); }
  .nav { flex-direction: row; }
  .connections { margin: 0 0 0 auto; flex-direction: row; gap: 14px; }
  .main { padding: 20px 16px 40px; }
  .grid-2 { grid-template-columns: 1fr; }
}

/* Đăng nhập & tài khoản */
.app[hidden], .login[hidden] { display: none; }
.login { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { width: min(420px, 100%); padding: 28px; display: flex; flex-direction: column; gap: 16px; }
.login-card .btn { text-align: center; }

.account { display: flex; flex-direction: column; gap: 6px; padding: 12px 6px 0; border-top: 1px solid var(--border); font-size: 13px; }
.account-email { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-warn { color: var(--warn); font-size: 12px; }
.account-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }