@import url('https://fonts.googleapis.com/css2?family=Overpass:wght@600;700;800&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg: #F5F6FA;
  --surface: #FFFFFF;
  --ink: #14181F;
  --muted: #6B7482;
  --hairline: #D7DBE3;
  --accent: #0058A3;
  --live: #0E8C81;
  --warn: #C8451B;
  --font-display: 'Overpass', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0E14;
    --surface: #151B24;
    --ink: #ECEFF3;
    --muted: #8993A4;
    --hairline: #2A313D;
    --accent: #4FA8E8;
    --live: #2DD4C6;
    --warn: #F0824C;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
}

header {
  padding: 40px 24px 20px;
  max-width: 880px;
  margin: 0 auto;
}
h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5vw, 34px);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.tagline { margin: 0; color: var(--muted); font-size: 14.5px; }

main { max-width: 880px; margin: 0 auto; padding: 0 24px 60px; }

.lines-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 12px;
}
.loading { color: var(--muted); font-family: var(--font-mono); font-size: 13px; }

.line-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-left: 5px solid var(--line-color, var(--accent));
  border-radius: 10px;
  padding: 16px 18px;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
  transition: transform 0.1s ease;
}
.line-card:hover { transform: translateY(-1px); }
.line-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.line-card-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 0 0 4px;
}
.line-card-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}
.line-card-status.clear { color: var(--muted); }
.line-card-status.active { color: var(--warn); font-weight: 600; }

#back-button {
  background: none;
  border: none;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  padding: 8px 0;
  margin-bottom: 8px;
}

#history-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  margin: 4px 0 14px;
}

#history-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 13.5px;
  color: var(--muted);
}
#days-select {
  font-family: var(--font-body);
  font-size: 13.5px;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  color: var(--ink);
}

.alert-list { display: flex; flex-direction: column; gap: 10px; }
.alert-item {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-left: 4px solid var(--hairline);
  border-radius: 10px;
  padding: 14px 16px;
}
.alert-item.active { border-left-color: var(--warn); }
.alert-item.resolved { opacity: 0.75; }
.alert-item-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}
.alert-item-title { font-weight: 600; font-size: 14.5px; }
.type-icon {
  font-size: 14px;
  margin-right: 3px;
  vertical-align: -1px;
}
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: 1px;
}
.status-dot.active { background: var(--warn); box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 22%, transparent); }
.status-dot.resolved { background: var(--muted); opacity: 0.5; }
.alert-item-time {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}
.alert-item-desc { font-size: 13.5px; color: var(--muted); line-height: 1.5; margin: 0 0 8px; }
.alert-item-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.tag {
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  color: var(--muted);
}

.empty { color: var(--muted); font-size: 13.5px; font-style: italic; }

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 20px 24px 40px;
  color: var(--muted);
  font-size: 12px;
  font-family: var(--font-mono);
}