:root {
  --bg: #07121a;
  --surface: rgba(10, 23, 33, 0.88);
  --surface-alt: rgba(14, 33, 45, 0.9);
  --line: #2b5670;
  --line-strong: #4e93b8;
  --ink: #e8f5ff;
  --muted: #abc4d5;
  --mono: "IBM Plex Mono", monospace;
  --sans: "Space Grotesk", sans-serif;
  --cyan: #39c4d9;
  --mint: #53d8b5;
  --gold: #f0c97d;
  --rose: #ec8686;
  --warning: #f7b84d;
  --ok: #5cd3a7;
  --bad: #ff8f9e;
  --shadow-soft: 0 14px 34px rgba(0, 0, 0, 0.34);
  --shadow-deep: 0 24px 56px rgba(0, 0, 0, 0.48);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1300px 820px at 14% 12%, rgba(46, 143, 196, 0.34) 0%, transparent 58%),
    radial-gradient(1200px 740px at 86% 8%, rgba(64, 214, 178, 0.22) 0%, transparent 58%),
    linear-gradient(165deg, #051018 0%, #0b2431 40%, #143748 54%, #0b2431 68%, #051018 100%);
  background-size: 110% 110%, 120% 120%, 170% 170%;
  animation: driftBg 16s ease-in-out infinite alternate;
  min-height: 100vh;
}

.ambient {
  position: fixed;
  z-index: -1;
  filter: blur(52px);
  opacity: 0.56;
  pointer-events: none;
}

.ambient-a {
  width: 58vw;
  height: 24vh;
  top: 16vh;
  right: -20vw;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(90, 212, 229, 0.2) 0%, rgba(28, 136, 182, 0.55) 55%, rgba(77, 220, 193, 0.2) 100%);
  animation: driftA 14s ease-in-out infinite alternate;
}

.ambient-b {
  width: 64vw;
  height: 26vh;
  left: -24vw;
  bottom: 8vh;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(145, 238, 221, 0.17) 0%, rgba(68, 170, 218, 0.45) 55%, rgba(145, 238, 221, 0.16) 100%);
  animation: driftB 13s ease-in-out infinite alternate;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: end;
  gap: 0.9rem;
  padding: 0.9rem clamp(0.84rem, 2vw, 1.5rem);
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(4, 13, 19, 0.95) 0%, rgba(4, 13, 19, 0.82) 100%);
  backdrop-filter: blur(10px);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #b8dff5;
  font-size: 0.7rem;
}

h1 {
  margin: 0.2rem 0 0;
  font-size: clamp(1.48rem, 2.8vw, 2.2rem);
  line-height: 1;
}

.top-nav {
  display: inline-flex;
  gap: 0.34rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem;
  background: rgba(10, 31, 43, 0.86);
}

.top-nav-link {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  text-decoration: none;
  color: #c4deee;
  padding: 0.26rem 0.72rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  border: 1px solid transparent;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.top-nav-link:hover,
.top-nav-link:focus-visible {
  border-color: #71c2d8;
  background: rgba(73, 181, 216, 0.2);
  outline: none;
}

.top-nav-link.is-active {
  background: linear-gradient(180deg, #4cc8de 0%, #2ba8cb 100%);
  color: #04202d;
  border-color: #7eddf0;
  font-weight: 700;
}

.meta {
  text-align: right;
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--muted);
}

.meta p {
  margin: 0.15rem 0;
}

.page {
  max-width: min(1700px, 100vw);
  margin: 0 auto;
  padding: 0.82rem clamp(0.84rem, 1.8vw, 1.5rem) 2.6rem;
}

.controls {
  display: grid;
  gap: 0.66rem;
  grid-template-columns: repeat(3, minmax(160px, 1fr));
  background: linear-gradient(180deg, rgba(13, 30, 41, 0.9) 0%, rgba(9, 22, 31, 0.9) 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 0.82rem;
  box-shadow: var(--shadow-soft);
}

.control-group {
  display: grid;
  gap: 0.36rem;
}

.control-group label {
  margin: 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9dd2ea;
  font-weight: 600;
}

select,
button {
  min-height: 38px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  font-family: var(--sans);
  font-size: 0.94rem;
}

select {
  background: #081722;
  color: var(--ink);
  padding: 0.5rem 0.6rem;
}

button {
  background: linear-gradient(180deg, #4fd4e0 0%, #34adc8 100%);
  color: #04202d;
  font-weight: 700;
  cursor: pointer;
  padding: 0.5rem 0.7rem;
}

button:hover,
button:focus-visible {
  filter: brightness(1.06);
  outline: 2px solid #95dff0;
  outline-offset: 1px;
}

.notice {
  margin-top: 0.72rem;
  border: 1px solid #85631f;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(101, 73, 15, 0.26) 0%, rgba(81, 57, 14, 0.22) 100%);
  color: #f6d089;
  min-height: 0;
  padding: 0;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease, min-height 180ms ease, padding 180ms ease;
}

.notice.is-visible {
  opacity: 1;
  transform: translateY(0);
  min-height: 38px;
  padding: 0.64rem 0.78rem;
  pointer-events: auto;
}

.kpi-grid {
  margin-top: 0.78rem;
  display: grid;
  gap: 0.66rem;
  grid-template-columns: repeat(4, minmax(170px, 1fr));
}

.kpi-card {
  border: 1px solid #31566e;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(12, 27, 37, 0.94) 0%, rgba(8, 21, 29, 0.94) 100%);
  padding: 0.7rem 0.76rem;
  box-shadow: var(--shadow-soft);
}

.kpi-label {
  margin: 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #99c7de;
}

.kpi-value {
  margin: 0.34rem 0 0;
  font-family: var(--mono);
  font-size: clamp(1.1rem, 2.1vw, 1.6rem);
  font-weight: 600;
}

.chart-grid {
  margin-top: 0.82rem;
  display: grid;
  gap: 0.72rem;
  grid-template-columns: repeat(2, minmax(280px, 1fr));
}

.chart-card {
  border: 1px solid #2d5770;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(13, 29, 39, 0.95) 0%, rgba(8, 21, 29, 0.95) 100%);
  overflow: hidden;
  box-shadow: var(--shadow-deep);
}

.chart-card--wide {
  grid-column: 1 / -1;
}

.chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  border-bottom: 1px solid #2a4b60;
  padding: 0.72rem 0.82rem;
}

.chart-head h2 {
  margin: 0;
  font-size: 1rem;
}

.branch-focus {
  margin: 0;
  font-size: 0.76rem;
  font-family: var(--mono);
  color: #9fd4e8;
}

.chart {
  height: 320px;
}

.occupation-charts {
  display: grid;
  gap: 0.62rem;
  grid-template-columns: minmax(360px, 1.45fr) minmax(280px, 1fr);
  padding: 0.62rem;
}

.chart--occupation {
  height: 460px;
  border: 1px solid #254a5f;
  border-radius: 12px;
  background: rgba(8, 20, 28, 0.8);
}

.availability,
.sources {
  margin-top: 0.82rem;
  border: 1px solid #2b5670;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(10, 25, 34, 0.92) 0%, rgba(8, 20, 28, 0.92) 100%);
  padding: 0.82rem;
  box-shadow: var(--shadow-soft);
}

.section-head h2 {
  margin: 0;
  font-size: 1rem;
}

.section-head p {
  margin: 0.26rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.availability-grid {
  margin-top: 0.7rem;
  display: grid;
  gap: 0.58rem;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
}

.availability-card {
  border: 1px solid #32566a;
  border-radius: 12px;
  background: rgba(8, 20, 28, 0.9);
  padding: 0.62rem 0.66rem;
}

.availability-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.availability-head h3 {
  margin: 0;
  font-size: 0.88rem;
}

.status-chip {
  border-radius: 999px;
  font-size: 0.68rem;
  padding: 0.22rem 0.52rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.status-chip--available {
  background: rgba(74, 201, 160, 0.2);
  color: var(--ok);
  border: 1px solid rgba(74, 201, 160, 0.48);
}

.status-chip--historical {
  background: rgba(247, 184, 77, 0.19);
  color: var(--warning);
  border: 1px solid rgba(247, 184, 77, 0.44);
}

.status-chip--unavailable {
  background: rgba(246, 125, 140, 0.16);
  color: var(--bad);
  border: 1px solid rgba(246, 125, 140, 0.4);
}

.availability-card p {
  margin: 0.42rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.35;
}

.sources details > summary {
  cursor: pointer;
  font-weight: 600;
}

.source-hint {
  margin: 0.52rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.source-list {
  margin-top: 0.58rem;
  display: grid;
  gap: 0.5rem;
}

.source-item {
  border: 1px solid #2f5568;
  border-radius: 12px;
  background: rgba(7, 18, 25, 0.92);
  padding: 0.58rem 0.64rem;
}

.source-item.is-relevant {
  border-color: #5ec8db;
  box-shadow: 0 0 0 1px rgba(94, 200, 219, 0.35) inset;
}

.source-item h3 {
  margin: 0;
  font-size: 0.88rem;
}

.source-item p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.35;
}

.source-item a {
  color: #7fd8ea;
  text-decoration: none;
}

.source-item a:hover,
.source-item a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 1080px) {
  .topbar {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .meta {
    text-align: left;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }

  .availability-grid {
    grid-template-columns: repeat(2, minmax(180px, 1fr));
  }
}

@media (max-width: 760px) {
  .topbar {
    position: static;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .kpi-grid,
  .chart-grid,
  .availability-grid {
    grid-template-columns: 1fr;
  }

  .occupation-charts {
    grid-template-columns: 1fr;
    padding: 0.52rem;
  }

  .chart {
    height: 280px;
  }

  .chart--occupation {
    height: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

@keyframes driftA {
  from {
    transform: translateY(0) translateX(0);
  }
  to {
    transform: translateY(8px) translateX(-20px);
  }
}

@keyframes driftB {
  from {
    transform: translateY(0) translateX(0);
  }
  to {
    transform: translateY(-10px) translateX(18px);
  }
}

@keyframes driftBg {
  from {
    background-position: 0% 0%, 100% 0%, 0% 50%;
  }
  to {
    background-position: 8% 10%, 92% 8%, 100% 50%;
  }
}