/* ── Reset & Variables ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg:          #0d1117;
  --surface:     #161b22;
  --surface-2:   #21262d;
  --border:      #30363d;
  --text:        #e6edf3;
  --text-muted:  #7d8590;
  --text-dim:    #484f58;
  --accent:      #58a6ff;

  --up:          #3fb950;
  --up-bg:       rgba(63, 185, 80, 0.12);
  --slow:        #d29922;
  --slow-bg:     rgba(210, 153, 34, 0.12);
  --down:        #f85149;
  --down-bg:     rgba(248, 81, 73, 0.12);
  --pending:     #484f58;
  --pending-bg:  rgba(72, 79, 88, 0.12);

  --radius:      10px;
  --radius-lg:   16px;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --transition:  0.18s ease;
}

html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ────────────────────────────────────────────────────────── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.logo {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Status Dots ───────────────────────────────────────────────────── */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.up      { background: var(--up);      box-shadow: 0 0 6px var(--up); }
.status-dot.slow    { background: var(--slow);    box-shadow: 0 0 6px var(--slow); }
.status-dot.down    { background: var(--down);    box-shadow: 0 0 6px var(--down); }
.status-dot.pending { background: var(--pending); }

/* pulse animation for down services */
@keyframes pulse-down {
  0%, 100% { box-shadow: 0 0 4px var(--down); }
  50%       { box-shadow: 0 0 12px var(--down), 0 0 20px var(--down); }
}
.status-dot.down { animation: pulse-down 1.6s ease-in-out infinite; }

/* ── Main Layout ───────────────────────────────────────────────────── */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-bottom: 1rem;
  min-height: 1.5rem;
}

.last-updated {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ── Card Grid ─────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

/* ── Service Card ──────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 1rem;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
  border-radius: var(--radius-lg);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.card:hover::before { opacity: 1; }

.card.up    { border-color: rgba(63, 185, 80, 0.35); }
.card.up::before    { background: var(--up-bg); }
.card.slow  { border-color: rgba(210, 153, 34, 0.35); }
.card.slow::before  { background: var(--slow-bg); }
.card.down  { border-color: rgba(248, 81, 73, 0.40); }
.card.down::before  { background: var(--down-bg); }

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.card-status-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.card-status-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.card-status-label.up    { color: var(--up); }
.card-status-label.slow  { color: var(--slow); }
.card-status-label.down  { color: var(--down); }
.card-status-label.pending { color: var(--pending); }

.protocol-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.18em 0.5em;
  border-radius: 4px;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-host {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 1rem;
}

.card-metrics {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.metric-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.metric-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.metric-value.up   { color: var(--up); }
.metric-value.slow { color: var(--slow); }
.metric-value.down { color: var(--down); }

.metric-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ── Skeleton ──────────────────────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
.skeleton {
  height: 148px;
  cursor: default;
  pointer-events: none;
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite linear;
}
.skeleton-grid {
  display: contents;
}

/* ── Modal ─────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  backdrop-filter: blur(4px);
}

@media (min-width: 600px) {
  .modal-backdrop {
    align-items: center;
    padding: 1.5rem;
  }
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  width: 100%;
  max-width: 680px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 1.5rem 1.5rem 2rem;
  position: relative;
  box-shadow: var(--shadow);
}

@media (min-width: 600px) {
  .modal {
    border-radius: var(--radius-lg);
    max-height: 88vh;
  }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.modal-close:hover {
  background: var(--border);
  color: var(--text);
}

.modal-header { margin-bottom: 1.25rem; }

.modal-title-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.3rem;
  padding-right: 2.5rem;
}

.modal-title-row h2 {
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.modal-subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  padding-left: 1.4rem;
}

/* ── Stat Boxes ────────────────────────────────────────────────────── */
.modal-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 480px) {
  .modal-stats { grid-template-columns: repeat(2, 1fr); }
}

.stat-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
}

.stat-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.stat-value.up   { color: var(--up); }
.stat-value.slow { color: var(--slow); }
.stat-value.down { color: var(--down); }

/* ── Range Tabs ────────────────────────────────────────────────────── */
.modal-range-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.range-tab {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 0.3em 0.75em;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.range-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.range-tab.active {
  background: rgba(88, 166, 255, 0.15);
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Chart ─────────────────────────────────────────────────────────── */
.chart-wrap {
  position: relative;
  height: 220px;
  margin-bottom: 1rem;
}

#history-chart { width: 100% !important; height: 100% !important; }

.chart-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* ── Status Timeline Bar ───────────────────────────────────────────── */
.status-timeline {
  height: 20px;
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  gap: 1px;
  background: var(--surface-2);
}

.timeline-seg {
  flex: 1 1 auto;
  min-width: 2px;
  height: 100%;
  transition: opacity 0.1s;
}
.timeline-seg.up      { background: var(--up); }
.timeline-seg.slow    { background: var(--slow); }
.timeline-seg.down    { background: var(--down); }
.timeline-seg.pending { background: var(--pending); }
.timeline-seg:hover   { opacity: 0.7; }

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }