:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --text: #1a1d23;
  --muted: #6b7280;
  --border: #e2e4e9;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #dc2626;
  --danger-text: #ffffff;
  --ok: #16a34a;
  --warn: #d97706;
  --bar-track: #e5e7eb;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1d2026;
    --surface-2: #23262d;
    --text: #e7e9ee;
    --muted: #9aa1ac;
    --border: #2b2f38;
    --accent: #3b82f6;
    --bar-track: #2b2f38;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}

h1, h2, h3 { margin: 0; }

.muted { color: var(--muted); font-size: 0.85rem; }

button {
  font-family: inherit;
  font-size: 0.9rem;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  background: var(--accent);
  color: var(--accent-text);
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
button.btn-danger { background: var(--danger); color: var(--danger-text); }
button.btn-small { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

input, select {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  width: 100%;
}

/* ---- login ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.login-card h1 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.login-card label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.85rem; color: var(--muted); }
.error { color: var(--danger); font-size: 0.85rem; margin: 0; }

/* ---- layout ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar h1 { font-size: 1.1rem; }
.topbar-actions { display: flex; align-items: center; gap: 0.6rem; }

/* ---- top-level view tabs ---- */
.tabbar {
  display: flex;
  gap: 0.3rem;
  padding: 0.6rem 1rem 0;
  max-width: 1100px;
  margin: 0 auto;
  overflow-x: auto;
}
.tabbar-btn {
  background: transparent;
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  white-space: nowrap;
}
.tabbar-btn.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

.view { display: none; flex-direction: column; gap: 1.25rem; }
.view.active { display: flex; }

.view > h2 {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---- pools ---- */
.pool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  align-items: start;
}
.pool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.pool-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.pool-card-head h3 { font-size: 1rem; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-ok { background: rgba(22,163,74,0.15); color: var(--ok); }
.badge-warn { background: rgba(217,119,6,0.15); color: var(--warn); }
.badge-danger { background: rgba(220,38,38,0.15); color: var(--danger); }

.bar-track {
  background: var(--bar-track);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.bar-fill { height: 100%; background: var(--accent); }
.bar-fill.warn { background: var(--warn); }
.bar-fill.danger { background: var(--danger); }

.pool-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.3rem 1rem;
  font-size: 0.85rem;
}
.pool-stats dt { color: var(--muted); }
.pool-stats dd { margin: 0; text-align: right; }
.pool-stats > div { display: contents; }

.pool-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.scan-info { font-size: 0.78rem; color: var(--muted); word-break: break-word; }

/* ---- card internal tabs ---- */
.card-tabs {
  display: flex;
  gap: 0.2rem;
  border-bottom: 1px solid var(--border);
  margin-top: 0.2rem;
}
.card-tab-btn {
  background: transparent;
  color: var(--muted);
  border: none;
  border-radius: 0;
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
  border-bottom: 2px solid transparent;
}
.card-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { padding-top: 0.75rem; }

/* two-column layout for pool overview tab: stats left, live I/O preview right */
.pool-overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}
@media (max-width: 560px) {
  .pool-overview-grid { grid-template-columns: 1fr; }
}
.pool-overview-left { display: flex; flex-direction: column; gap: 0.6rem; }
.pool-overview-right { display: flex; flex-direction: column; gap: 0.3rem; }
.pool-overview-right h4 { font-size: 0.78rem; color: var(--muted); font-weight: 500; margin: 0 0 0.2rem; }
.pool-overview-right h4 + * { margin-bottom: 0.6rem; }
.kv-table.compact th, .kv-table.compact td { padding: 0.28rem 0.4rem; font-size: 0.78rem; }
.kv-table.compact { width: 100%; }

/* ---- datasets ---- */
.dataset-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.dataset-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.dataset-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  cursor: pointer;
}
.dataset-head h3 { font-size: 0.95rem; word-break: break-all; }
.dataset-summary {
  display: flex;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.dataset-body {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  display: none;
  flex-direction: column;
  gap: 0.4rem;
}
.dataset-card.expanded .dataset-body { display: flex; }

.snapshot-toolbar { display: flex; gap: 0.5rem; margin-bottom: 0.6rem; }
.snapshot-toolbar input { flex: 1; }

table.snapshot-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
table.snapshot-table th, table.snapshot-table td {
  text-align: left;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
table.snapshot-table th { color: var(--muted); font-weight: 500; }
.empty-note { color: var(--muted); font-size: 0.85rem; }

/* ---- modal ---- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 20;
}
.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal h3 { margin: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; }

/* ---- toast ---- */
.toast {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  z-index: 30;
}
.toast.error { background: var(--danger); color: var(--danger-text); }

@media (max-width: 640px) {
  .pool-stats { grid-template-columns: 1fr; }
}

/* ---- arc stats bar ---- */
.arc-bar {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
}
.arc-bar .arc-item { display: flex; gap: 0.4rem; }
.arc-bar .arc-label { color: var(--muted); }

table.kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
table.kv-table th, table.kv-table td {
  text-align: left;
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table.kv-table th { color: var(--muted); font-weight: 500; }
table.kv-table .prop-name { word-break: break-word; font-weight: 600; }
table.kv-table .prop-desc { color: var(--muted); font-size: 0.72rem; margin-top: 0.15rem; }
table.kv-table .source-badge {
  font-size: 0.7rem;
  color: var(--muted);
}
table.kv-table .value-edit { display: flex; gap: 0.3rem; }
table.kv-table .value-edit input { padding: 0.25rem 0.4rem; font-size: 0.78rem; }

.chart-wrap { margin-top: 0.5rem; }
.chart-legend { display: flex; gap: 1rem; font-size: 0.75rem; color: var(--muted); margin-top: 0.3rem; }
.legend-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 0.3rem; }
.chart-live svg { width: 100%; height: 90px; }

/* 실시간 I/O is its own section now, so the chart gets the height it was cramped out of
   when it sat in a corner of the pool card. One card per pool, side by side. */
.iostat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  align-items: start;
}
.iostat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}
.iostat-card h4 { font-size: 0.85rem; margin: 0 0 0.5rem; }

/* ---- disk management ---- */
.disk-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}
@media (max-width: 640px) {
  .disk-info-grid { grid-template-columns: 1fr; }
}
.disk-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.disk-card h3 { font-size: 0.95rem; }
.disk-kv { display: grid; grid-template-columns: auto 1fr; gap: 0.3rem 0.8rem; font-size: 0.85rem; }
.disk-kv dt { color: var(--muted); }
.disk-kv dd { margin: 0; text-align: right; }

.speed-hero { display: flex; align-items: baseline; gap: 0.5rem; }
.speed-hero .value { font-size: 1.6rem; font-weight: 700; }
.speed-hero .unit { color: var(--muted); font-size: 0.85rem; }

.usb-event-list { display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.8rem; max-height: 260px; overflow-y: auto; }
.usb-event-row { display: flex; gap: 0.7rem; padding: 0.35rem 0; border-bottom: 1px solid var(--border); }
.usb-event-row .ts { color: var(--muted); white-space: nowrap; }

/* ---- schedules ---- */
.schedule-toolbar { display: flex; justify-content: flex-end; }
table.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
table.schedule-table th, table.schedule-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
table.schedule-table th { color: var(--muted); font-weight: 500; background: var(--surface-2); }
table.schedule-table tr:last-child td { border-bottom: none; }

/* The 원격 데스크톱 entry is an anchor so it can open in a new tab, but it sits among
   buttons — the base button rules are element-scoped, so the look is restated here. */
a.btn-secondary {
  font-family: inherit;
  font-size: 0.9rem;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}