diff --git a/backup-monitor/static/css/style.css b/backup-monitor/static/css/style.css
index 9452692..d0afffd 100644
--- a/backup-monitor/static/css/style.css
+++ b/backup-monitor/static/css/style.css
@@ -1 +1,721 @@
-/* Sentinel Design System – all styles via Tailwind CSS */
+:root {
+  color-scheme: dark;
+  --canvas: #101210;
+  --surface: #171a17;
+  --surface-raised: #1d211d;
+  --surface-hover: #232823;
+  --border: #2c312c;
+  --border-strong: #3a413a;
+  --text: #edf1eb;
+  --text-soft: #b8c0b7;
+  --text-muted: #7f897f;
+  --accent: #7abf8a;
+  --accent-soft: #203326;
+  --status-ok: #7abf8a;
+  --status-warning: #d0a15e;
+  --status-error: #d67b76;
+  --status-disabled: #7f897f;
+  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
+  --radius: 6px;
+  --max-width: 1280px;
+}
+
+* { box-sizing: border-box; }
+
+html { min-width: 320px; background: var(--canvas); }
+
+body {
+  margin: 0;
+  min-height: 100vh;
+  background: var(--canvas);
+  color: var(--text);
+  font-family: var(--font-sans);
+  font-size: 15px;
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+}
+
+button,
+input { font: inherit; }
+
+button,
+a { -webkit-tap-highlight-color: transparent; }
+
+button { color: inherit; }
+
+a { color: inherit; }
+
+:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: 3px;
+}
+
+.hidden { display: none !important; }
+
+.site-header {
+  position: sticky;
+  top: 0;
+  z-index: 30;
+  border-bottom: 1px solid var(--border);
+  background: rgba(16, 18, 16, 0.96);
+}
+
+.topbar {
+  width: min(100% - 40px, var(--max-width));
+  min-height: 64px;
+  margin: 0 auto;
+  display: grid;
+  grid-template-columns: auto 1fr auto;
+  align-items: center;
+  gap: 28px;
+}
+
+.brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 10px;
+  text-decoration: none;
+  white-space: nowrap;
+}
+
+.brand-mark {
+  display: grid;
+  place-items: center;
+  width: 30px;
+  height: 30px;
+  border: 1px solid var(--border-strong);
+  border-radius: 5px;
+  background: var(--surface-raised);
+  color: var(--accent);
+  font-family: var(--font-mono);
+  font-size: 13px;
+  font-weight: 700;
+}
+
+.brand strong,
+.brand small { display: block; }
+
+.brand strong {
+  font-size: 14px;
+  line-height: 1.2;
+  letter-spacing: -0.01em;
+}
+
+.brand small {
+  margin-top: 2px;
+  color: var(--text-muted);
+  font-size: 11px;
+}
+
+.main-nav {
+  display: flex;
+  align-items: stretch;
+  align-self: stretch;
+  gap: 2px;
+}
+
+.main-nav a {
+  position: relative;
+  display: inline-flex;
+  align-items: center;
+  padding: 0 12px;
+  color: var(--text-muted);
+  font-size: 13px;
+  font-weight: 500;
+  text-decoration: none;
+}
+
+.main-nav a::after {
+  content: "";
+  position: absolute;
+  right: 12px;
+  bottom: -1px;
+  left: 12px;
+  height: 2px;
+  background: transparent;
+}
+
+.main-nav a:hover { color: var(--text-soft); }
+.main-nav a.is-active { color: var(--text); }
+.main-nav a.is-active::after { background: var(--accent); }
+
+.topbar-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.system-state {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  min-height: 34px;
+  padding: 0 11px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  color: var(--text-soft);
+  font-size: 12px;
+  white-space: nowrap;
+}
+
+.status-dot {
+  display: inline-block;
+  width: 7px;
+  height: 7px;
+  border-radius: 50%;
+  background: var(--status-disabled);
+  flex: 0 0 auto;
+}
+
+.status--ok { --status-color: var(--status-ok); }
+.status--stale { --status-color: var(--status-warning); }
+.status--error { --status-color: var(--status-error); }
+.status--disabled { --status-color: var(--status-disabled); }
+.status-dot.status--ok,
+.status-dot.status--stale,
+.status-dot.status--error,
+.status-dot.status--disabled { background: var(--status-color); }
+
+.icon-button {
+  display: inline-grid;
+  place-items: center;
+  width: 36px;
+  height: 36px;
+  padding: 0;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: transparent;
+  color: var(--text-soft);
+  cursor: pointer;
+  font-size: 20px;
+  line-height: 1;
+}
+
+.icon-button:hover { background: var(--surface-raised); color: var(--text); }
+
+.app-shell {
+  width: min(100% - 40px, var(--max-width));
+  margin: 0 auto;
+  padding: 48px 0 64px;
+}
+
+.page-header {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  gap: 32px;
+  margin-bottom: 28px;
+}
+
+.eyebrow {
+  margin: 0 0 6px;
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+  font-size: 11px;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+h1,
+h2,
+h3,
+p { margin-top: 0; }
+
+h1 {
+  margin-bottom: 6px;
+  font-size: clamp(28px, 4vw, 38px);
+  font-weight: 600;
+  line-height: 1.15;
+  letter-spacing: -0.035em;
+}
+
+h2 {
+  margin-bottom: 0;
+  font-size: 16px;
+  font-weight: 600;
+  letter-spacing: -0.01em;
+}
+
+.lede {
+  margin-bottom: 0;
+  color: var(--text-soft);
+  font-size: 14px;
+}
+
+.scan-state {
+  min-width: 150px;
+  padding-left: 18px;
+  border-left: 1px solid var(--border);
+}
+
+.scan-state span,
+.scan-state time { display: block; }
+
+.scan-state span {
+  margin-bottom: 4px;
+  color: var(--text-muted);
+  font-size: 11px;
+}
+
+.scan-state time {
+  color: var(--text-soft);
+  font-family: var(--font-mono);
+  font-size: 13px;
+}
+
+.metric-strip {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  margin-bottom: 20px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+  overflow: hidden;
+}
+
+.metric {
+  min-height: 122px;
+  padding: 22px 24px;
+  border-right: 1px solid var(--border);
+}
+
+.metric:last-child { border-right: 0; }
+
+.metric-label {
+  display: block;
+  margin-bottom: 16px;
+  color: var(--text-muted);
+  font-size: 12px;
+}
+
+.metric strong {
+  display: block;
+  font-family: var(--font-mono);
+  font-size: clamp(23px, 3vw, 31px);
+  font-weight: 500;
+  line-height: 1;
+  letter-spacing: -0.04em;
+}
+
+.metric small {
+  display: block;
+  margin-top: 8px;
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+  font-size: 11px;
+}
+
+.metric--issue.has-issues strong { color: var(--status-error); }
+
+.text-button {
+  margin-top: 8px;
+  padding: 0;
+  border: 0;
+  background: none;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 11px;
+  text-decoration: underline;
+  text-underline-offset: 3px;
+}
+
+.text-button:hover { color: var(--text); }
+
+.dashboard-grid {
+  display: grid;
+  grid-template-columns: minmax(0, 2fr) minmax(290px, 1fr);
+  gap: 20px;
+  margin-bottom: 20px;
+}
+
+.panel {
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+}
+
+.panel-header {
+  padding: 19px 22px;
+  border-bottom: 1px solid var(--border);
+}
+
+.panel-header--split {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+}
+
+.panel-header p {
+  margin: 5px 0 0;
+  color: var(--text-muted);
+  font-size: 12px;
+}
+
+.quiet-note {
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+  font-size: 10px;
+}
+
+.chart {
+  height: 248px;
+  padding: 26px 22px 20px;
+}
+
+.chart svg {
+  display: block;
+  width: 100%;
+  height: 100%;
+  overflow: visible;
+}
+
+.cluster-list {
+  max-height: 248px;
+  padding: 10px 12px 14px;
+  overflow-y: auto;
+}
+
+.cluster-group + .cluster-group { margin-top: 14px; }
+
+.cluster-heading {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  padding: 5px 8px;
+  color: var(--text-muted);
+  font-family: var(--font-mono);
+  font-size: 10px;
+  letter-spacing: 0.07em;
+  text-transform: uppercase;
+}
+
+.cluster-row {
+  width: 100%;
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 10px;
+  padding: 8px;
+  border: 0;
+  border-radius: 4px;
+  background: transparent;
+  color: var(--text);
+  cursor: pointer;
+  text-align: left;
+}
+
+.cluster-row:hover { background: var(--surface-hover); }
+.cluster-row strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
+.cluster-row small { color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }
+
+.status-pill {
+  display: inline-flex;
+  align-items: center;
+  min-height: 22px;
+  padding: 0 7px;
+  border: 1px solid color-mix(in srgb, var(--status-color) 35%, transparent);
+  border-radius: 999px;
+  color: var(--status-color);
+  font-family: var(--font-mono);
+  font-size: 9px;
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+  white-space: nowrap;
+}
+
+.event-list { padding: 4px 20px 10px; }
+
+.event-row {
+  display: grid;
+  grid-template-columns: 70px 8px minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 12px;
+  min-height: 44px;
+  border-bottom: 1px solid var(--border);
+}
+
+.event-row:last-child { border-bottom: 0; }
+.event-time { color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }
+.event-message { min-width: 0; color: var(--text-soft); font-size: 13px; }
+.event-message strong { color: var(--text); font-weight: 600; }
+.event-detail { max-width: 260px; overflow: hidden; color: var(--status-error); font-family: var(--font-mono); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
+
+.inline-counts {
+  display: flex;
+  margin: 0;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  overflow: hidden;
+}
+
+.inline-counts > div {
+  min-width: 112px;
+  padding: 12px 16px;
+}
+
+.inline-counts > div + div { border-left: 1px solid var(--border); }
+.inline-counts dt { color: var(--text-muted); font-size: 11px; }
+.inline-counts dd { margin: 2px 0 0; font-family: var(--font-mono); font-size: 20px; }
+
+.alert-list,
+.host-grid { display: grid; gap: 10px; }
+
+.alert-row {
+  display: grid;
+  grid-template-columns: 8px minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 16px;
+  min-height: 72px;
+  padding: 14px 18px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+}
+
+.alert-copy h3 { margin: 0 0 4px; font-size: 14px; font-weight: 600; }
+.alert-meta { display: flex; flex-wrap: wrap; gap: 14px; color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }
+
+.empty-state {
+  margin: 0;
+  padding: 48px 20px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  color: var(--text-muted);
+  text-align: center;
+}
+
+.host-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
+
+.host-card {
+  width: 100%;
+  padding: 18px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+  color: var(--text);
+  cursor: pointer;
+  text-align: left;
+}
+
+.host-card:hover { border-color: var(--border-strong); background: var(--surface-raised); }
+.host-card.is-disabled { opacity: 0.55; }
+
+.host-card-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 18px;
+}
+
+.host-card-header strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; }
+
+.host-facts {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 14px;
+  margin: 0;
+}
+
+.host-facts div { min-width: 0; }
+.host-facts dt { color: var(--text-muted); font-size: 10px; }
+.host-facts dd { margin: 3px 0 0; overflow: hidden; font-family: var(--font-mono); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
+
+.settings-list {
+  max-width: 760px;
+  margin: 0;
+  border-top: 1px solid var(--border);
+}
+
+.settings-list > div {
+  display: grid;
+  grid-template-columns: minmax(160px, 1fr) minmax(220px, 2fr);
+  gap: 24px;
+  padding: 18px 0;
+  border-bottom: 1px solid var(--border);
+}
+
+.settings-list dt { color: var(--text-soft); }
+.settings-list dd { margin: 0; color: var(--text-muted); }
+code { color: var(--accent); font-family: var(--font-mono); font-size: 12px; }
+
+.button {
+  min-height: 40px;
+  padding: 0 15px;
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius);
+  background: var(--surface-raised);
+  color: var(--text-soft);
+  cursor: pointer;
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.button:hover { background: var(--surface-hover); color: var(--text); }
+.button--primary { border-color: #537c5d; background: var(--accent-soft); color: #bfe3c6; }
+.button--primary:hover { background: #29432f; }
+.button--danger { border-color: transparent; background: transparent; color: var(--status-error); }
+
+.backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: 40;
+  background: rgba(0, 0, 0, 0.62);
+  opacity: 1;
+  transition: opacity 150ms ease;
+}
+
+.backdrop.is-hidden { opacity: 0; pointer-events: none; }
+
+.drawer {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  z-index: 50;
+  width: min(540px, 94vw);
+  border-left: 1px solid var(--border);
+  background: var(--canvas);
+  transform: translateX(0);
+  transition: transform 180ms ease;
+}
+
+.drawer.is-closed { transform: translateX(100%); pointer-events: none; }
+
+.modal {
+  position: fixed;
+  top: 50%;
+  left: 50%;
+  z-index: 60;
+  width: min(440px, calc(100vw - 32px));
+  border: 1px solid var(--border-strong);
+  border-radius: var(--radius);
+  background: var(--surface);
+  transform: translate(-50%, -50%) scale(1);
+  opacity: 1;
+  transition: opacity 150ms ease, transform 150ms ease;
+}
+
+.modal.is-closed {
+  transform: translate(-50%, -48%) scale(0.98);
+  opacity: 0;
+  pointer-events: none;
+}
+
+.overlay-header {
+  min-height: 68px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 14px 20px;
+  border-bottom: 1px solid var(--border);
+}
+
+.overlay-header h2 { font-size: 17px; }
+.drawer-body { height: calc(100% - 68px); padding: 22px; overflow-y: auto; }
+
+.drawer-stats {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  overflow: hidden;
+}
+
+.drawer-stat { padding: 14px; text-align: left; }
+.drawer-stat + .drawer-stat { border-left: 1px solid var(--border); }
+.drawer-stat strong { display: block; font-family: var(--font-mono); font-size: 18px; font-weight: 500; }
+.drawer-stat span { display: block; margin-top: 5px; color: var(--text-muted); font-size: 10px; }
+
+.detail-section { margin-top: 24px; }
+.detail-section h3 { margin-bottom: 10px; color: var(--text-muted); font-size: 11px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; }
+
+.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
+.calendar-day { aspect-ratio: 1; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 3px; color: var(--text-muted); font-family: var(--font-mono); font-size: 9px; }
+.calendar-day.has-backup { border-color: #35533c; background: #1b2b20; color: #9fd0aa; }
+.calendar-day.has-error { border-color: #5a3533; background: #2c1d1c; color: #e0a09b; }
+
+.size-bars { height: 68px; display: flex; align-items: end; gap: 2px; border-bottom: 1px solid var(--border); }
+.size-bar { flex: 1; min-width: 2px; background: var(--accent); opacity: 0.65; }
+.size-bar.is-empty { opacity: 0.12; }
+
+.history-list { border-top: 1px solid var(--border); }
+.history-row { display: grid; grid-template-columns: 92px 8px 1fr auto auto; align-items: center; gap: 10px; min-height: 39px; border-bottom: 1px solid var(--border); font-size: 11px; }
+.history-date { color: var(--text-muted); font-family: var(--font-mono); }
+.history-size,
+.history-files { color: var(--text-muted); font-family: var(--font-mono); text-align: right; }
+
+.drawer-actions { display: flex; gap: 8px; margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--border); }
+
+.form-stack { display: grid; gap: 18px; padding: 22px; }
+.form-stack label > span { display: block; margin-bottom: 7px; color: var(--text-soft); font-size: 12px; }
+.form-stack input[type="text"],
+.form-stack input[type="url"] { width: 100%; min-height: 42px; padding: 0 12px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--canvas); color: var(--text); }
+.form-stack input::placeholder { color: #667066; }
+.checkbox-row { display: flex; align-items: center; gap: 9px; }
+.checkbox-row span { margin: 0 !important; }
+.form-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 6px; }
+
+.toast-stack { position: fixed; right: 20px; bottom: 20px; z-index: 80; display: grid; gap: 8px; }
+.toast { min-width: 220px; padding: 11px 13px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface-raised); color: var(--text-soft); font-size: 12px; }
+
+::-webkit-scrollbar { width: 8px; height: 8px; }
+::-webkit-scrollbar-track { background: transparent; }
+::-webkit-scrollbar-thumb { border: 2px solid transparent; border-radius: 999px; background: var(--border-strong); background-clip: padding-box; }
+
+@media (max-width: 900px) {
+  .topbar { grid-template-columns: auto 1fr; gap: 16px; padding: 10px 0; }
+  .main-nav { grid-row: 2; grid-column: 1 / -1; min-height: 40px; overflow-x: auto; border-top: 1px solid var(--border); }
+  .main-nav a { min-height: 40px; padding: 0 10px; }
+  .topbar-actions { justify-self: end; }
+  .dashboard-grid { grid-template-columns: 1fr; }
+  .host-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+}
+
+@media (max-width: 720px) {
+  .topbar,
+  .app-shell { width: min(100% - 24px, var(--max-width)); }
+  .topbar { gap: 10px; }
+  .brand small { display: none; }
+  .system-state span:last-child { display: none; }
+  .system-state { min-width: 44px; min-height: 44px; padding: 0 17px; }
+  .icon-button { width: 44px; height: 44px; }
+  .main-nav,
+  .main-nav a { min-height: 44px; }
+  .app-shell { padding-top: 32px; }
+  .page-header { align-items: flex-start; flex-direction: column; gap: 16px; }
+  .scan-state { padding-left: 0; border-left: 0; }
+  .metric-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+  .metric { min-height: 112px; padding: 18px; }
+  .metric:nth-child(2) { border-right: 0; }
+  .metric:nth-child(-n + 2) { border-bottom: 1px solid var(--border); }
+  .panel-header { padding: 16px; }
+  .chart { height: 210px; padding: 22px 16px 16px; }
+  .event-list { padding: 4px 14px 8px; }
+  .event-row { grid-template-columns: 56px 8px minmax(0, 1fr); }
+  .event-detail { display: none; }
+  .host-grid { grid-template-columns: 1fr; }
+  .alert-row { grid-template-columns: 8px minmax(0, 1fr); }
+  .alert-row .button { grid-column: 2; justify-self: start; }
+  .inline-counts { width: 100%; }
+  .inline-counts > div { min-width: 0; flex: 1; }
+  .settings-list > div { grid-template-columns: 1fr; gap: 6px; }
+  .drawer-body { padding: 16px; }
+  .history-row { grid-template-columns: 76px 7px 1fr auto; }
+  .history-files { display: none; }
+  .toast-stack { right: 12px; bottom: 12px; left: 12px; }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    scroll-behavior: auto !important;
+    transition-duration: 0.01ms !important;
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+  }
+}