:root {
  --bg: #f0f2f5;
  --fg: #1a1d23;
  --card: #ffffff;
  --card-hover: #ffffff;
  --border: #e2e5ea;
  --border-hover: #d1d5db;
  --muted: #9ca3af;
  --subtle: #6b7280;
  --accent: #3b82f6;
  --accent-soft: rgba(59,130,246,0.08);
  --green: #10b981;
  --green-soft: rgba(16,185,129,0.1);
  --red: #ef4444;
  --red-soft: rgba(239,68,68,0.1);
  --yellow: #f59e0b;
  --yellow-soft: rgba(245,158,11,0.1);
  --purple: #8b5cf6;
  --purple-soft: rgba(139,92,246,0.1);
  --input-hover-bg: #f9fafb;
  --shadow: rgba(0,0,0,0.03);
  --shadow-hover: rgba(0,0,0,0.06);
  --table-stripe: rgba(0,0,0,0.015);
}

.dark-mode {
  --bg: #0c1322;
  --fg: #e8ecf2;
  --card: #151e30;
  --card-hover: #1a2740;
  --border: #243044;
  --border-hover: #334764;
  --muted: #7b8ba4;
  --subtle: #a3b3c9;
  --accent: #60a5fa;
  --accent-soft: rgba(96,165,250,0.1);
  --green: #34d399;
  --green-soft: rgba(52,211,153,0.1);
  --red: #f87171;
  --red-soft: rgba(248,113,113,0.1);
  --yellow: #fbbf24;
  --yellow-soft: rgba(251,191,36,0.1);
  --purple: #a78bfa;
  --purple-soft: rgba(167,139,250,0.1);
  --input-hover-bg: #1a2740;
  --shadow: rgba(0,0,0,0.12);
  --shadow-hover: rgba(0,0,0,0.2);
  --table-stripe: rgba(255,255,255,0.02);
}

* { -webkit-font-smoothing: antialiased; font-family: 'Inter', sans-serif; box-sizing: border-box; }
body { background: var(--bg); color: var(--fg); margin: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 1px 3px var(--shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 4px 16px var(--shadow-hover);
}

.metric-card {
  padding: 1rem 1.125rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  position: relative;
  overflow: hidden;
}
.metric-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  border-radius: 3px 0 0 3px;
}
.metric-card[data-color="blue"]::before { background: var(--accent); }
.metric-card[data-color="green"]::before { background: var(--green); }
.metric-card[data-color="red"]::before { background: var(--red); }
.metric-card[data-color="yellow"]::before { background: var(--yellow); }
.metric-card[data-color="purple"]::before { background: var(--purple); }

.metric-icon {
  width: 32px; height: 32px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem; flex-shrink: 0;
}
.metric-icon.blue { background: var(--accent-soft); color: var(--accent); }
.metric-icon.green { background: var(--green-soft); color: var(--green); }
.metric-icon.red { background: var(--red-soft); color: var(--red); }
.metric-icon.yellow { background: var(--yellow-soft); color: var(--yellow); }
.metric-icon.purple { background: var(--purple-soft); color: var(--purple); }

.metric-label {
  font-size: 0.6875rem; color: var(--muted); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.metric-value {
  font-size: 1.375rem; font-weight: 800; letter-spacing: -0.02em;
  line-height: 1.2;
}
.metric-sub {
  font-size: 0.6875rem; color: var(--muted); font-weight: 500;
}

.chart-box { padding: 1rem 1rem 0.5rem; overflow: hidden; }
.chart-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.5rem;
}
.chart-header h3 {
  font-size: 0.8125rem; font-weight: 700;
  display: flex; align-items: center; gap: 0.375rem;
}
.chart-dot {
  width: 6px; height: 6px; border-radius: 50%;
  display: inline-block;
}

.status-badge {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.25rem 0.75rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600;
}
.status-badge.online {
  background: var(--green-soft); color: var(--green);
}
.status-badge.degraded {
  background: var(--yellow-soft); color: var(--yellow);
}
.status-badge.offline {
  background: var(--red-soft); color: var(--red);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
.status-badge.online .status-dot { background: var(--green); }
.status-badge.degraded .status-dot { background: var(--yellow); }
.status-badge.offline .status-dot { background: var(--red); }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.duration-btn {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  height: 32px; padding: 0 8px; cursor: pointer;
  display: flex; align-items: center; gap: 4px; transition: all 0.2s ease;
  color: var(--subtle); white-space: nowrap;
}
@media (min-width: 640px) {
  .duration-btn { height: 36px; padding: 0 10px; gap: 5px; }
}
.duration-btn:hover { border-color: var(--border-hover); background: var(--input-hover-bg); color: var(--fg); }
.duration-btn .dur-chevron { transition: transform 0.2s ease; flex-shrink: 0; }
.duration-btn.open .dur-chevron { transform: rotate(180deg); }
.duration-label { font-size: 0.8125rem; font-weight: 600; color: var(--fg); }

.duration-wrapper { position: relative; }
.duration-panel {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 10px; box-shadow: 0 8px 32px var(--shadow-hover); width: 190px; z-index: 200;
  opacity: 0; transform: translateY(-6px) scale(0.98); pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.duration-panel.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: all; }

.dur-presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-bottom: 8px; }
.dur-chip {
  background: transparent; border: 1px solid var(--border); border-radius: 6px;
  padding: 5px 2px; font-size: 0.75rem; font-weight: 600; color: var(--subtle);
  cursor: pointer; transition: all 0.15s; text-align: center; font-family: 'Inter', sans-serif;
}
.dur-chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.dur-chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

.dur-divider {
  font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--muted); margin: 4px 0 8px; padding-top: 8px; border-top: 1px solid var(--border);
}
.dur-custom { display: flex; align-items: center; gap: 5px; }
.dur-custom-label { font-size: 0.8125rem; color: var(--subtle); flex-shrink: 0; }
.dur-num {
  width: 50px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 6px; color: var(--fg); font-size: 0.8125rem; font-weight: 500;
  font-family: 'Inter', sans-serif; text-align: center; transition: border-color 0.15s;
}
.dur-num:focus { outline: none; border-color: var(--accent); }
.dur-unit {
  flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 5px; color: var(--fg); font-size: 0.8125rem; font-weight: 500;
  font-family: 'Inter', sans-serif; cursor: pointer; transition: border-color 0.15s;
}
.dur-unit:focus { outline: none; border-color: var(--accent); }
.dur-apply {
  width: 100%; margin-top: 8px; padding: 6px; border-radius: 7px;
  background: var(--accent); color: #fff; border: none; font-size: 0.8125rem; font-weight: 600;
  cursor: pointer; transition: opacity 0.15s; font-family: 'Inter', sans-serif;
}
.dur-apply:hover { opacity: 0.85; }

.theme-toggle {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  width: 32px; height: 32px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all 0.2s ease;
  color: var(--subtle);
}
.theme-toggle:hover { border-color: var(--border-hover); background: var(--input-hover-bg); color: var(--fg); }
@media (min-width: 640px) {
  .theme-toggle { width: 36px; height: 36px; }
}

.target-table {
  width: 100%; border-collapse: collapse; font-size: 0.75rem;
  table-layout: auto;
}
.target-table th {
  text-align: left; font-size: 0.625rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--muted); padding: 0.3rem 0.375rem;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.target-table th:not(:first-child) { text-align: right; }
.target-table td {
  padding: 0.35rem 0.375rem;
  border-bottom: 1px solid var(--border);
  color: var(--fg);
}
/* Number columns: shrink to content, never wrap */
.target-table td:not(:first-child),
.target-table th:not(:first-child) { width: 1%; white-space: nowrap; text-align: right; }
.target-table tr:last-child td { border-bottom: none; }
.target-table tr:nth-child(even) td { background: var(--table-stripe); }
.target-table .host-cell {
  font-weight: 600; display: flex; align-items: center; gap: 0.3rem;
}
.target-table .ip-cell {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.625rem; color: var(--muted);
}
.inline-dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
}
.inline-dot.up { background: var(--green); }
.inline-dot.down { background: var(--red); }

.health-ring {
  position: relative; width: 100px; height: 100px;
}
.health-ring svg { transform: rotate(-90deg); }
.health-ring .ring-bg {
  fill: none; stroke: var(--border); stroke-width: 8;
}
.health-ring .ring-fg {
  fill: none; stroke-width: 8; stroke-linecap: round;
  transition: stroke-dashoffset 0.8s ease;
}
.health-score-text {
  position: absolute; inset: 0; display: flex;
  flex-direction: column; align-items: center; justify-content: center;
}
.health-score-num {
  font-size: 1.5rem; font-weight: 800; line-height: 1;
}
.health-score-label {
  font-size: 0.5625rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted); margin-top: 2px;
}

.section-label {
  font-size: 0.6875rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--muted); margin-bottom: 0.5rem;
  display: flex; align-items: center; gap: 0.375rem;
}

@media (min-width: 1024px) {
  #chartGrid {
    grid-template-rows: 1fr 1fr;
  }
  #chartGrid .card {
    display: flex; flex-direction: column; min-height: 0;
  }
  #chartGrid .card > div[id$="Chart"] {
    flex: 1; min-height: 0;
  }
}

@media (max-width: 639px) {
  .metric-value { font-size: 1.125rem; }
  .metric-card { padding: 0.75rem 0.875rem; }
  .chart-box { padding: 0.75rem 0.75rem 0.25rem; }
}

/* Flash animation when new data arrives */
@keyframes flash-update {
  0%   { box-shadow: 0 0 0 0 var(--accent-soft), 0 1px 3px var(--shadow); }
  25%  { box-shadow: 0 0 0 4px var(--accent-soft), 0 1px 3px var(--shadow); }
  100% { box-shadow: 0 1px 3px var(--shadow); }
}
.flash-update { animation: flash-update 0.7s ease-out; }

/* Live indicator dot */
.live-dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); margin-right: 4px;
  animation: pulse-dot 2s infinite;
}

/* Loading shimmer on lastUpdated text */
.refreshing { color: var(--muted); font-style: italic; }

/* Settings button */
.settings-btn {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  width: 32px; height: 32px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease; color: var(--subtle);
}
@media (min-width: 640px) {
  .settings-btn { width: 36px; height: 36px; }
}
.settings-btn:hover { border-color: var(--border-hover); background: var(--input-hover-bg); color: var(--fg); }

/* Icon button shared */
.icon-btn svg { display: block; }

/* App logo */
.app-logo {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
@media (min-width: 640px) {
  .app-logo { width: 38px; height: 38px; border-radius: 10px; }
}

/* Section label with icon */
.section-label {
  display: flex; align-items: center; gap: 0.375rem;
}

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.modal-backdrop.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.25);
  width: 100%; max-width: 560px; max-height: 92vh; overflow-y: auto;
  transform: translateY(16px) scale(0.98); transition: transform 0.25s ease;
}
.modal-backdrop.open .modal { transform: translateY(0) scale(1); }

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.375rem 1.625rem;
}
.modal-header h2 { font-size: 1.0625rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; }
.modal-close {
  background: var(--bg); border: 1px solid var(--border); cursor: pointer;
  color: var(--muted); width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.modal-close:hover { color: var(--fg); border-color: var(--border-hover); }

.modal-body { padding: 0 1.625rem 1.5rem; display: flex; flex-direction: column; gap: 1.5rem; }

.modal-section-title {
  font-size: 0.6875rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.07em; color: var(--muted);
  display: flex; align-items: center; gap: 0.375rem;
  padding-bottom: 0.75rem; border-bottom: 1px solid var(--border);
  margin-bottom: 0.875rem;
}

.targets-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.875rem; }
@media (max-width: 480px) { .targets-grid { grid-template-columns: 1fr; } }

.field-group { display: flex; flex-direction: column; gap: 0.375rem; }
.field-label {
  font-size: 0.6875rem; font-weight: 700; color: var(--subtle);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.field-hint { font-size: 0.6875rem; color: var(--muted); margin-top: 0.25rem; line-height: 1.4; }
.field-input {
  background: var(--bg); border: 1px solid var(--border); border-radius: 9px;
  padding: 0.5rem 0.75rem; color: var(--fg); font-size: 0.8125rem;
  width: 100%; transition: border-color 0.15s, box-shadow 0.15s;
  font-family: 'SF Mono', 'Fira Code', monospace; line-height: 1.6;
}
.field-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.12); }
textarea.field-input { resize: none; }

/* Interval cards */
.intervals-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
.interval-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 0.875rem 1rem; display: flex; flex-direction: column; gap: 0.5rem;
  transition: border-color 0.15s;
  cursor: text;
}
.interval-card:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
.interval-card-label { font-size: 0.6875rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.interval-input-row { display: flex; align-items: baseline; gap: 0.25rem; }
.interval-input {
  background: transparent; border: none; outline: none;
  font-size: 1.625rem; font-weight: 800; color: var(--fg);
  width: 100%; min-width: 0; letter-spacing: -0.02em;
  font-family: 'Inter', sans-serif;
  -moz-appearance: textfield;
}
.interval-input::-webkit-outer-spin-button,
.interval-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.interval-unit { font-size: 0.75rem; font-weight: 600; color: var(--muted); white-space: nowrap; }

/* Footer */
.modal-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.625rem; border-top: 1px solid var(--border); gap: 1rem;
  flex-wrap: wrap;
}
.modal-note {
  font-size: 0.7rem; color: var(--muted);
  display: flex; align-items: center; gap: 0.35rem;
}
.modal-actions { display: flex; align-items: center; gap: 0.5rem; margin-left: auto; }

.btn {
  padding: 0.5rem 1.125rem; border-radius: 9px; font-size: 0.8125rem;
  font-weight: 600; cursor: pointer; border: none; transition: all 0.15s;
  white-space: nowrap;
}
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--subtle); }
.btn-ghost:hover { border-color: var(--border-hover); color: var(--fg); background: var(--bg); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { opacity: 0.88; }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }

.save-status { font-size: 0.75rem; font-weight: 600; }
.save-status.ok { color: var(--green); }
.save-status.err { color: var(--red); }


/* ── Toast notifications ───────────────────────────────────────── */
.toast-container {
  position: fixed; bottom: 1rem; right: 1rem;
  display: flex; flex-direction: column-reverse; gap: 0.5rem;
  z-index: 999; pointer-events: none;
}
.toast {
  display: flex; align-items: flex-start; gap: 0.5rem;
  padding: 0.625rem 0.875rem; border-radius: 10px;
  background: var(--card); border: 1px solid var(--border);
  border-left-width: 3px;
  box-shadow: 0 8px 24px var(--shadow-hover);
  font-size: 0.75rem; font-weight: 600; color: var(--fg);
  min-width: 200px; max-width: 300px;
  pointer-events: all; cursor: pointer;
  animation: toast-in 0.25s ease forwards;
}
.toast.dismiss { animation: toast-out 0.25s ease forwards; }
.toast-icon { flex-shrink: 0; margin-top: 1px; }
.toast-body { flex: 1; line-height: 1.4; }
.toast-title { font-weight: 700; }
.toast-msg { font-weight: 500; color: var(--subtle); margin-top: 1px; }
.toast.warn  .toast-icon { color: var(--yellow); }
.toast.warn  { border-left-color: var(--yellow); }
.toast.error .toast-icon { color: var(--red); }
.toast.error { border-left-color: var(--red); }
.toast.ok    .toast-icon { color: var(--green); }
.toast.ok    { border-left-color: var(--green); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(12px); }
}