:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --surface-soft: #f2f4f6;
  --line: #e7e9ec;
  --line-strong: #d9dde2;
  --text: #252a31;
  --muted: #8e949c;
  
  --green: #35b64a;
  --green-soft: #e9f8ec;
  --amber: #ff8608;
  --amber-soft: #fff3e6;
  --red: #f04f4f;
  --red-soft: #fff0f0;
  --blue: #3b6eea;
  --blue-soft: #eef3ff;
  --ink: #252a31;
  
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 22px 60px rgba(15, 23, 42, 0.08);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 8px;
  --radius-xl: 8px;
  
  color-scheme: light;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

body[data-page="availability"] {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #fafbfc;
}

/* ==========================================================================
   Layout (Public)
   ========================================================================== */
body[data-page="availability"] .layout {
  flex: 1;
  width: min(100%, 1380px);
  margin: 0 auto;
  padding: 64px 40px 64px;
}

.group-monitor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.live-metrics {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.live-metrics h1 {
  margin: 0 4px 0 0;
  color: var(--ink);
  font-size: 24px;
  font-weight: 760;
  letter-spacing: 0;
}

.live-metrics span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.live-metrics b {
  color: #6e747c;
  font-weight: 800;
}

#publicOnline {
  color: var(--green);
}

#publicOffline {
  color: #727981;
}

.monitor-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #a6acb3;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}

/* ==========================================================================
   Group Cards (Public)
   ========================================================================== */
.group-monitor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.group-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  min-height: 180px;
  padding: 24px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: none;
  border: 1px solid var(--line);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.group-card:hover {
  border-color: #c9d1dc;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  transform: translateY(-1px);
}

.group-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  min-width: 0;
}

.group-card-top > div:first-child {
  min-width: 0;
}

.group-card h2 {
  display: flex;
  align-items: center;
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 760;
  letter-spacing: 0;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.group-card p {
  margin: 0;
  color: #b0b5bb;
  font-size: 13px;
  font-weight: 600;
}

.availability-number {
  text-align: right;
}

.availability-number strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 34px;
  font-weight: 900;
  letter-spacing: 0;
  color: var(--green);
  line-height: 1;
}

.availability-number small {
  margin-left: 4px;
  font-size: 16px;
  font-weight: 900;
  color: var(--green);
}

.availability-number span {
  display: block;
  margin-top: 4px;
  color: #b0b5bb;
  font-size: 10px;
  font-weight: 700;
}

.availability-number .availability-trend.trend-up { color: var(--green); }
.availability-number .availability-trend.trend-down { color: var(--red); }
.availability-number .availability-trend.trend-flat { color: #9ba2a9; }

.group-card.slow .availability-number strong,
.group-card.degraded .availability-number strong,
.group-card.slow .availability-number small,
.group-card.degraded .availability-number small { color: var(--amber); }
.group-card.critical .availability-number strong,
.group-card.critical .availability-number small { color: var(--red); }
.group-card.unknown .availability-number strong,
.group-card.unknown .availability-number small,
.group-card.empty .availability-number strong,
.group-card.empty .availability-number small { color: #b5bac0; }

.group-card-quality {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.group-card-quality span {
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfd;
}

.group-card-quality small {
  display: block;
  margin-bottom: 4px;
  color: #a9afb6;
  font-size: 10px;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
}

.group-card-quality strong {
  display: block;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.group-card.healthy .quality-status strong { color: var(--green); }
.group-card.slow .quality-status strong,
.group-card.degraded .quality-status strong { color: var(--amber); }
.group-card.critical .quality-status strong { color: var(--red); }
.group-card.unknown .quality-status strong,
.group-card.empty .quality-status strong { color: #9ba2a9; }

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 4px;
  border-radius: 50%;
}
.dot.healthy { background: var(--green); }
.dot.slow, .dot.degraded { background: var(--amber); }
.dot.critical { background: var(--red); }
.dot.unknown,
.dot.empty { background: #d9dde1; }

/* ==========================================================================
   Admin Shell
   ========================================================================== */
.admin-shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
  background: var(--bg);
}

.admin-sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 28px 18px;
  background: var(--surface);
  border-right: 1px solid var(--line);
}

.admin-brand {
  margin-bottom: 34px;
  padding: 0 12px;
}

.admin-brand .eyebrow {
  margin-bottom: 8px;
}

.admin-brand strong {
  font-size: 20px;
  font-weight: 760;
  color: var(--ink);
  letter-spacing: 0;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.admin-nav-link {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 620;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.admin-nav-link:hover {
  color: var(--ink);
  background: var(--surface-soft);
}

.admin-nav-link.active {
  color: var(--ink);
  background: var(--surface-soft);
  font-weight: 760;
}

.admin-sidebar-footer {
  padding-top: 24px;
  margin-top: auto;
}

.admin-nav-link.logout {
  color: var(--red);
}
.admin-nav-link.logout:hover {
  background: var(--red-soft);
}

.admin-main {
  padding: 40px 48px 56px;
  max-width: 1500px;
}

.admin-topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}

.admin-topbar h1 {
  font-size: 28px;
  font-weight: 760;
  color: var(--ink);
  letter-spacing: 0;
}

.admin-controls {
  display: flex;
  align-items: flex-end;
  gap: 16px;
}

.admin-page[hidden] {
  display: none;
}

/* ==========================================================================
   UI Components (Buttons, Inputs, etc.)
   ========================================================================== */
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 4px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 620;
  color: var(--text);
  margin-bottom: 6px;
}

input, select {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}

input:focus, select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-weight: 680;
  cursor: pointer;
  transition: all 0.2s ease;
}

.button:hover {
  background: var(--surface-soft);
}

.button.mini {
  height: 30px;
  padding: 0 10px;
  font-size: 12px;
}

.button.primary {
  border: none;
  background: var(--ink);
  color: #fff;
}

.button.primary:hover {
  background: #3a4048;
}

.button.danger-light {
  border: none;
  background: var(--red-soft);
  color: var(--red);
}
.button.danger-light:hover {
  background: #fecaca;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge.healthy { color: var(--green); background: var(--green-soft); }
.badge.slow, .badge.degraded { color: var(--amber); background: var(--amber-soft); }
.badge.critical { color: var(--red); background: var(--red-soft); }
.badge.unknown { color: var(--text); background: var(--surface-soft); }

/* ==========================================================================
   Admin Panels & Tables
   ========================================================================== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.stat {
  padding: 24px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: none;
  border: 1px solid var(--line);
}

.stat span {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

.stat strong {
  display: block;
  margin: 12px 0 8px;
  font-size: 32px;
  font-weight: 760;
  letter-spacing: 0;
  color: var(--ink);
}

.stat small {
  font-size: 13px;
  color: var(--muted);
}

.panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: none;
  border: 1px solid var(--line);
  margin-bottom: 24px;
  overflow: hidden;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  font-size: 18px;
  font-weight: 760;
  color: var(--ink);
  margin: 0 0 4px 0;
}

.section-head p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.section-actions {
  display: flex;
  gap: 12px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 16px 28px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

th {
  font-weight: 680;
  color: var(--muted);
  background: #fafbfc;
}

td {
  color: var(--text);
  vertical-align: middle;
}

td strong {
  font-weight: 680;
  color: var(--ink);
}

td small {
  color: var(--muted);
}

.group-card-placeholder {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 210px;
  border: 1px solid #e7e9ec;
  border-radius: 20px;
  background: #ffffff;
}

/* ==========================================================================
   Forms & Controls
   ========================================================================== */
.settings-form {
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.settings-form label {
  margin-bottom: 8px;
}

.settings-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.settings-status {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.group-ignore-row td {
  padding: 0;
  background: #fafbfc;
}

.group-ignore-form {
  padding: 20px 28px 24px;
}

.group-ignore-form label {
  display: block;
  margin: 0;
}

.group-ignore-form textarea {
  width: 100%;
  min-height: 112px;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.group-ignore-form textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.group-ignore-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 16px;
}

.group-ignore-actions span {
  margin-right: auto;
  color: var(--muted);
  font-size: 13px;
}

.check-control {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  margin: 0;
}

.check-control input {
  width: 16px;
  height: 16px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--green);
}

.check-control span {
  font-size: 14px;
  font-weight: 400;
}

.drag-handle {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: grab;
  font-size: 16px;
  padding: 4px 8px;
}
.drag-handle:active { cursor: grabbing; }

.group-row.dragging {
  opacity: 0.5;
  background: var(--surface-soft);
}

.group-row.drag-over {
  border-top: 2px solid var(--blue);
}

.inline-status {
  padding: 12px 28px;
  background: #fafbfc;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.inline-status:empty { display: none; }

.notice {
  padding: 16px;
  background: var(--blue-soft);
  color: var(--blue);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 14px;
  font-weight: 500;
}
.notice.muted {
  background: var(--surface-soft);
  color: var(--muted);
}

/* ==========================================================================
   Login
   ========================================================================== */
.login-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-panel {
  width: 100%;
  max-width: 400px;
  padding: 40px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
}

.login-panel h1 {
  font-size: 24px;
  font-weight: 760;
  margin-bottom: 8px;
  color: var(--ink);
}

.login-copy {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.login-form label { margin-bottom: 8px; }
.login-form button { margin-top: 8px; }

.login-error {
  padding: 12px;
  background: var(--red-soft);
  color: var(--red);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .admin-shell { grid-template-columns: 200px minmax(0, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .group-monitor-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1680px) {
  body[data-page="availability"] .layout {
    width: min(100%, 1560px);
  }
  .group-monitor-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-sidebar {
    position: static;
    height: auto;
    padding: 16px;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .admin-nav {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 8px;
  }
  .admin-nav-link { white-space: nowrap; }
  .admin-sidebar-footer { padding-top: 16px; margin-top: 0; }
  .admin-main { padding: 24px 16px; }
  .admin-topbar { flex-direction: column; align-items: flex-start; gap: 16px; }
  .admin-controls { width: 100%; flex-wrap: wrap; }
  .admin-controls label, .admin-controls select { width: 100%; }
  
  body[data-page="availability"] .layout { padding: 28px 16px 40px; }
  .group-monitor-head { align-items: flex-start; flex-direction: column; margin-bottom: 28px; }
  .live-metrics { gap: 12px; }
  .live-metrics h1 { width: 100%; font-size: 24px; }
  .live-metrics span { font-size: 14px; }
  .monitor-tools { font-size: 13px; }
  .group-monitor-grid { grid-template-columns: 1fr; gap: 18px; }
  .group-card { min-height: 160px; padding: 18px; border-radius: var(--radius-xl); }
  .availability-number strong { font-size: 34px; }
  .settings-form { grid-template-columns: 1fr; }
}