:root {
  --bg: #0f1419;
  --card: #1a1f26;
  --border: #2a313b;
  --text: #e8eaed;
  --text-muted: #8b95a5;
  --up: #10b981;
  --down: #ef4444;
  --changed: #f59e0b;
  --accent: #3b82f6;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.container {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.5rem;
  gap: 1.25rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.logo {
  height: 18px;
  width: auto;
  opacity: 0.9;
  /* filter: invert(1); */
}

@media (prefers-color-scheme: light) {
  .logo { filter: none; opacity: 0.85; }
}

h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.cadence {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
}

.last-updated {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  font-weight: 500;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.9; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.status-section {
  flex: 1;
  min-height: 0;
  display: flex;
}

.status-list {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  grid-auto-rows: 1fr;
  gap: 0.75rem;
  min-height: 0;
}

.status-card {
  container-type: inline-size;
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.status-card.changed {
  border-color: var(--changed);
  box-shadow: 0 0 0 1px var(--changed), 0 0 24px -4px rgba(245, 158, 11, 0.25);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--text-muted);
}
.status-card.up .status-dot {
  background: var(--up);
  box-shadow: 0 0 8px var(--up);
}
.status-card.down .status-dot {
  background: var(--down);
  box-shadow: 0 0 10px var(--down);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.site-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  overflow: hidden;
}

.site-name {
  font-weight: 600;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-url {
  color: var(--text-muted);
  font-size: 0.72rem;
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: none;
}
.site-url:hover { color: var(--accent); }

.seo-tag {
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 500;
  display: none;
}

.response-time {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  display: none;
}

.status-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  background: rgba(139, 149, 165, 0.15);
  color: var(--text-muted);
}
.status-card.up .status-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--up);
}
.status-card.down .status-badge {
  background: rgba(239, 68, 68, 0.15);
  color: var(--down);
}

/* Container queries — card content scales with card width. */
@container (min-width: 240px) {
  .status-card { padding: 1rem 1.25rem; gap: 0.9rem; }
  .status-dot { width: 12px; height: 12px; }
  .site-name { font-size: 1rem; }
  .site-url { display: block; }
  .seo-tag { display: block; }
  .status-badge { font-size: 0.7rem; padding: 0.25rem 0.55rem; }
}

@container (min-width: 360px) {
  .status-card { padding: 1.25rem 1.5rem; }
  .site-name { font-size: 1.15rem; }
  .site-url { font-size: 0.8rem; }
  .response-time { display: block; font-size: 0.85rem; }
  .status-dot { width: 14px; height: 14px; }
}

@container (min-width: 500px) {
  .status-card { padding: 1.5rem 2rem; gap: 1.25rem; }
  .site-name { font-size: 1.4rem; }
  .site-url { font-size: 0.9rem; }
  .response-time { font-size: 0.95rem; }
  .status-dot { width: 16px; height: 16px; }
  .status-badge { font-size: 0.8rem; padding: 0.35rem 0.75rem; }
}

@container (min-width: 720px) {
  .status-card { padding: 2rem 2.5rem; gap: 1.75rem; }
  .site-name { font-size: 1.75rem; }
  .site-url { font-size: 1rem; }
  .response-time { font-size: 1.1rem; }
  .status-dot { width: 20px; height: 20px; }
  .status-badge { font-size: 0.9rem; padding: 0.4rem 0.9rem; }
}

.empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: var(--text-muted);
  gap: 0.5rem;
  text-align: center;
  padding: 1rem;
}
.empty p + p { font-size: 0.85rem; }

@media (max-width: 640px) {
  .container { padding: 1rem; gap: 1rem; }
  h1 { font-size: 1.2rem; }
  .header { align-items: flex-start; }
  .meta { align-items: flex-start; }
}