.header-nav a[aria-current="page"] { color: var(--text); }

.history-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: end;
  min-height: 330px;
  padding: 78px 0 54px;
  border-bottom: 1px solid var(--border);
}

.history-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 650;
  letter-spacing: -.055em;
  line-height: 1;
}

.history-hero > div:first-child > p:last-child {
  max-width: 660px;
  margin: 24px 0 0;
  color: var(--text-soft);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.8;
}

.history-range-control {
  min-width: 250px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(12, 15, 22, .78);
  box-shadow: inset 0 1px rgba(255, 255, 255, .035);
}

.history-range-control > span {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.history-range-control > div {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}

.history-range-control button {
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, .025);
  color: var(--muted);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.history-range-control button:hover { color: var(--text); border-color: var(--border-strong); }
.history-range-control button[aria-pressed="true"] {
  border-color: rgba(155, 135, 245, .42);
  background: rgba(155, 135, 245, .14);
  color: var(--text);
}

.history-summary {
  display: grid;
  grid-template-columns: 1.25fr .8fr .9fr 1fr;
  border-bottom: 1px solid var(--border);
}

.history-summary > div {
  min-width: 0;
  padding: 28px 24px;
  border-right: 1px solid var(--border);
}

.history-summary > div:first-child { padding-left: 0; }
.history-summary > div:last-child { border-right: 0; }
.history-summary span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.history-summary strong {
  display: block;
  overflow: hidden;
  font-size: 20px;
  font-weight: 620;
  letter-spacing: -.025em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-section { padding-top: 80px; }
.history-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: -8px 0 28px;
  color: var(--muted);
  font-size: 12px;
}
.history-legend span { display: inline-flex; align-items: center; gap: 8px; }
.history-legend i {
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--unknown);
  box-shadow: 0 0 0 3px rgba(135, 146, 165, .08);
}
.history-legend i[data-status="operational"] { background: var(--success); box-shadow: 0 0 0 3px var(--success-soft); }
.history-legend i[data-status="maintenance"] { background: var(--warning); box-shadow: 0 0 0 3px var(--warning-soft); }
.history-legend i[data-status="degraded"] { background: #e69a52; box-shadow: 0 0 0 3px rgba(230, 154, 82, .12); }
.history-legend i[data-status="outage"] { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }

.history-service-list { display: grid; gap: 22px; }
.history-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(12, 15, 22, .74);
  box-shadow: inset 0 1px rgba(255, 255, 255, .025);
}
.history-card-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.history-service-title { display: flex; align-items: center; gap: 14px; min-width: 0; }
.history-service-mark {
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: rgba(255, 255, 255, .035);
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 750;
}
.history-service-title h3 { margin: 0; font-size: 17px; font-weight: 650; letter-spacing: -.02em; }
.history-service-title p { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.history-service-metrics { display: flex; gap: 26px; text-align: right; }
.history-service-metrics span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.history-service-metrics strong { font-size: 17px; font-weight: 650; }
.history-current { display: inline-flex; align-items: center; gap: 8px; }
.history-current::before { width: 8px; height: 8px; border-radius: 50%; background: var(--unknown); content: ""; }
.history-current[data-status="operational"]::before { background: var(--success); }
.history-current[data-status="maintenance"]::before { background: var(--warning); }
.history-current[data-status="degraded"]::before { background: #e69a52; }
.history-current[data-status="outage"]::before { background: var(--danger); }

.history-grid-wrap {
  overflow-x: auto;
  padding: 22px 24px 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.history-day-grid {
  display: grid;
  grid-template-columns: repeat(var(--history-days), minmax(24px, 1fr));
  gap: 5px;
  min-width: max(660px, calc(var(--history-days) * 29px));
}
.history-day {
  position: relative;
  display: grid;
  min-width: 0;
  height: 44px;
  place-items: end center;
  padding: 0 0 7px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: rgba(135, 146, 165, .11);
  color: rgba(255, 255, 255, .48);
  font-size: 9px;
  cursor: default;
}
.history-day::before {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), transparent);
  content: "";
}
.history-day[data-status="operational"] { background: rgba(69, 214, 160, .22); color: #a8f1d6; }
.history-day[data-status="maintenance"] { background: rgba(240, 189, 85, .22); color: #f5d994; }
.history-day[data-status="degraded"] { background: rgba(230, 154, 82, .24); color: #f2c092; }
.history-day[data-status="outage"] { background: rgba(241, 112, 127, .24); color: #f4adb6; }
.history-day:hover { border-color: rgba(255, 255, 255, .2); }
.history-axis {
  display: flex;
  justify-content: space-between;
  min-width: max(660px, calc(var(--history-days) * 29px));
  margin-top: 10px;
  color: var(--muted);
  font-size: 11px;
}

.history-loading { display: grid; gap: 16px; }
.history-loading span {
  display: block;
  height: 154px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(100deg, rgba(255,255,255,.02) 20%, rgba(255,255,255,.055) 40%, rgba(255,255,255,.02) 60%);
  background-size: 220% 100%;
  animation: history-shimmer 1.5s linear infinite;
}

.history-error {
  padding: 34px;
  border: 1px solid rgba(241, 112, 127, .25);
  border-radius: var(--radius-lg);
  background: var(--danger-soft);
}
.history-error strong { display: block; margin-bottom: 8px; }
.history-error p { margin: 0; color: var(--text-soft); line-height: 1.7; }

@keyframes history-shimmer { to { background-position-x: -220%; } }

@media (max-width: 800px) {
  .history-hero { grid-template-columns: 1fr; gap: 30px; min-height: 0; padding: 64px 0 44px; }
  .history-range-control { width: 100%; min-width: 0; }
  .history-summary { grid-template-columns: repeat(2, 1fr); }
  .history-summary > div { border-bottom: 1px solid var(--border); }
  .history-summary > div:nth-child(2) { border-right: 0; }
  .history-summary > div:nth-last-child(-n+2) { border-bottom: 0; }
  .history-summary > div:first-child { padding-left: 24px; }
  .history-card-head { grid-template-columns: 1fr; gap: 22px; }
  .history-service-metrics { justify-content: flex-start; text-align: left; }
}

@media (max-width: 560px) {
  .history-summary { grid-template-columns: 1fr; }
  .history-summary > div { padding: 21px 0; border-right: 0; border-bottom: 1px solid var(--border) !important; }
  .history-summary > div:first-child { padding-left: 0; }
  .history-summary > div:last-child { border-bottom: 0 !important; }
  .history-card-head, .history-grid-wrap { padding-left: 18px; padding-right: 18px; }
  .history-service-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .history-loading span { animation: none; }
}