:root {
  color-scheme: light;
  --ds-bg: #f4f7f8;
  --ds-bg-2: #e8f2f2;
  --ds-panel: #ffffff;
  --ds-panel-2: #f8fbfa;
  --ds-ink: #162320;
  --ds-ink-soft: #32433f;
  --ds-muted: #667572;
  --ds-line: #d3dedf;
  --ds-line-strong: #aebfc0;
  --ds-night: #071817;
  --ds-night-2: #102825;
  --ds-teal: #007f78;
  --ds-teal-dark: #00615b;
  --ds-aqua: #28bfb8;
  --ds-coral: #e85d4f;
  --ds-amber: #d89122;
  --ds-violet: #6658c7;
  --ds-lime: #a7c83f;
  --ds-red: #b42318;
  --ds-success-bg: #e5f6ee;
  --ds-danger-bg: #fff0ee;
  --ds-radius: 8px;
  --ds-shadow: 0 18px 42px rgba(26, 45, 43, 0.1);
  --ds-shadow-soft: 0 10px 28px rgba(26, 45, 43, 0.07);
  --ds-page: min(1220px, calc(100vw - 36px));
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background:
    linear-gradient(135deg, rgba(40, 191, 184, 0.12), transparent 32rem),
    linear-gradient(225deg, rgba(232, 93, 79, 0.08), transparent 28rem),
    var(--ds-bg);
  color: var(--ds-ink);
  font-family: "Aptos", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  min-width: 320px;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

input,
textarea {
  color-scheme: light;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 76px;
  padding: 0 32px;
  border-bottom: 1px solid rgba(211, 222, 223, 0.9);
  background: rgba(244, 247, 248, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 174px;
  font-weight: 780;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(40, 191, 184, 0.4);
  border-radius: var(--ds-radius);
  background:
    linear-gradient(135deg, rgba(40, 191, 184, 0.2), transparent 48%),
    radial-gradient(circle at 76% 24%, var(--ds-amber) 0 8%, transparent 9%),
    var(--ds-night);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.brand-mark::before {
  position: absolute;
  inset: 10px 8px 9px 9px;
  content: "";
  border-left: 2px solid var(--ds-aqua);
  border-bottom: 2px solid var(--ds-lime);
  transform: skewX(-16deg);
}

.brand-mark::after {
  position: absolute;
  width: 28px;
  height: 2px;
  content: "";
  background: var(--ds-coral);
  transform: rotate(-31deg) translate(1px, -1px);
  transform-origin: center;
}

.brand-copy {
  display: grid;
  gap: 1px;
  line-height: 1;
}

.brand-name {
  color: var(--ds-ink);
  font-size: 1rem;
}

.brand-system {
  color: var(--ds-teal);
  font-size: 0.7rem;
  font-weight: 760;
}

.main-nav,
.locale-switch {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a,
.locale-switch a {
  min-height: 40px;
  padding: 10px 12px;
  border-radius: var(--ds-radius);
  color: var(--ds-muted);
  font-size: 0.95rem;
}

.main-nav a:hover,
.locale-switch a:hover,
.locale-switch .active {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ds-ink);
  box-shadow: inset 0 0 0 1px var(--ds-line);
}

.app-shell {
  width: var(--ds-page);
  margin: 0 auto;
  padding: 36px 0 72px;
}

.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.page-heading h1 {
  max-width: 780px;
  margin: 0;
  font-size: 3.65rem;
  line-height: 0.98;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  color: var(--ds-teal-dark);
  font-size: 0.78rem;
  font-weight: 820;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  content: "";
  background: linear-gradient(90deg, var(--ds-coral), var(--ds-aqua));
}

.dashboard-grid,
.content-split,
.charts-grid {
  display: grid;
  gap: 18px;
}

.dashboard-grid {
  grid-template-columns: minmax(0, 1.22fr) minmax(280px, 0.78fr);
  align-items: stretch;
}

.content-split {
  grid-template-columns: minmax(0, 1fr) 340px;
  margin-top: 28px;
}

.charts-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

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

.tool-panel,
.stats-panel,
.jump-card,
.import-row {
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--ds-shadow-soft);
}

.tool-panel {
  padding: 20px;
}

.tool-panel.wide {
  width: min(760px, 100%);
}

.tool-panel h2,
.section-header h2,
.trajectory h2 {
  margin: 0 0 16px;
  font-size: 1.05rem;
}

.import-panel {
  position: relative;
  overflow: hidden;
}

.import-panel::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  content: "";
  background: linear-gradient(90deg, var(--ds-coral), var(--ds-amber), var(--ds-aqua), var(--ds-violet));
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
}

.stat {
  min-height: 122px;
  padding: 18px;
  border-right: 1px solid var(--ds-line);
  border-bottom: 1px solid var(--ds-line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.66), rgba(248, 251, 250, 0.92));
}

.stat span,
.metric-strip span,
.jump-date,
.details-grid dt {
  display: block;
  color: var(--ds-muted);
  font-size: 0.82rem;
}

.stat strong,
.metric-strip strong {
  display: block;
  margin-top: 8px;
  color: var(--ds-ink);
  font-size: 2.2rem;
  line-height: 1;
}

.upload-form {
  display: grid;
  gap: 14px;
}

.upload-drop {
  position: relative;
  display: grid;
  min-height: 198px;
  place-items: center;
  padding: 24px;
  overflow: hidden;
  border: 1px dashed var(--ds-line-strong);
  border-radius: var(--ds-radius);
  background:
    linear-gradient(135deg, rgba(40, 191, 184, 0.12), transparent 45%),
    linear-gradient(315deg, rgba(216, 145, 34, 0.1), transparent 42%),
    var(--ds-panel-2);
  cursor: pointer;
  text-align: center;
}

.upload-drop::before {
  position: absolute;
  width: 220px;
  height: 220px;
  content: "";
  border: 1px solid rgba(0, 127, 120, 0.14);
  transform: rotate(26deg);
}

.upload-drop:hover {
  border-color: var(--ds-teal);
  background:
    linear-gradient(135deg, rgba(40, 191, 184, 0.16), transparent 45%),
    linear-gradient(315deg, rgba(232, 93, 79, 0.1), transparent 42%),
    #fbfefd;
}

.upload-drop input {
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

.upload-title,
.upload-hint {
  position: relative;
}

.upload-title {
  display: block;
  font-size: 1.28rem;
  font-weight: 800;
}

.upload-hint,
.file-summary,
.empty-state {
  color: var(--ds-muted);
}

.upload-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.primary-button,
.secondary-button,
.danger-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: var(--ds-radius);
  cursor: pointer;
  font-weight: 780;
}

.primary-button {
  background: linear-gradient(135deg, var(--ds-teal), var(--ds-teal-dark));
  color: #fff;
  box-shadow: 0 10px 22px rgba(0, 127, 120, 0.22);
}

.primary-button:hover {
  filter: brightness(0.96);
}

.primary-button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.25);
  opacity: 0.58;
  box-shadow: none;
}

.secondary-button {
  border-color: var(--ds-line);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ds-ink);
}

.secondary-button:hover {
  border-color: var(--ds-line-strong);
}

.danger-button {
  width: 100%;
  background: var(--ds-red);
  color: #fff;
}

.jump-list,
.import-list {
  display: grid;
  gap: 10px;
}

.jump-card,
.import-row {
  display: grid;
  gap: 5px;
  padding: 16px;
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.jump-card:hover,
.import-row:hover {
  border-color: var(--ds-aqua);
  box-shadow: var(--ds-shadow);
  transform: translateY(-1px);
}

.jump-card strong {
  color: var(--ds-ink);
  font-size: 1.1rem;
}

.import-row {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--ds-bg-2);
  color: var(--ds-muted);
  font-size: 0.8rem;
  font-weight: 760;
}

.status.imported {
  background: var(--ds-success-bg);
  color: var(--ds-teal-dark);
}

.status.failed {
  background: var(--ds-danger-bg);
  color: var(--ds-red);
}

.flash {
  margin-bottom: 18px;
  padding: 12px 14px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: var(--ds-panel);
}

.flash.notice {
  border-color: rgba(0, 127, 120, 0.34);
  background: var(--ds-success-bg);
}

.flash.alert {
  border-color: rgba(184, 35, 24, 0.28);
  background: var(--ds-danger-bg);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 24px;
  overflow: hidden;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: var(--ds-line);
  box-shadow: var(--ds-shadow-soft);
}

.metric-strip div {
  min-height: 104px;
  padding: 16px;
  background: linear-gradient(180deg, #fff, var(--ds-panel-2));
}

.trajectory {
  margin: 0 calc(50% - 50vw);
  padding: 26px max(18px, calc((100vw - 1220px) / 2));
  background:
    linear-gradient(180deg, rgba(40, 191, 184, 0.05), transparent 38%),
    var(--ds-night);
  color: #edf9f6;
}

.trajectory-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: var(--ds-page);
  margin: 0 auto;
}

.trajectory-header h2 {
  margin: 0;
}

.trajectory-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.trajectory-time {
  min-width: 112px;
  color: #edf9f6;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.trajectory-icon-button {
  position: relative;
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid rgba(237, 249, 246, 0.2);
  border-radius: 50%;
  background: rgba(237, 249, 246, 0.08);
  color: #edf9f6;
  cursor: pointer;
}

.trajectory-icon-button:hover {
  border-color: rgba(40, 191, 184, 0.46);
  background: rgba(40, 191, 184, 0.14);
}

.play-toggle-icon {
  display: block;
  width: 0;
  height: 0;
  margin-left: 2px;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 11px solid currentColor;
}

.trajectory-play-button.is-playing .play-toggle-icon {
  position: relative;
  width: 12px;
  height: 14px;
  margin-left: 0;
  border: 0;
}

.trajectory-play-button.is-playing .play-toggle-icon::before,
.trajectory-play-button.is-playing .play-toggle-icon::after {
  position: absolute;
  top: 0;
  width: 4px;
  height: 14px;
  content: "";
  border-radius: 1px;
  background: currentColor;
}

.trajectory-play-button.is-playing .play-toggle-icon::before {
  left: 1px;
}

.trajectory-play-button.is-playing .play-toggle-icon::after {
  right: 1px;
}

.camera-reset-icon {
  position: relative;
  display: block;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.camera-reset-icon::before,
.camera-reset-icon::after {
  position: absolute;
  content: "";
  background: currentColor;
}

.camera-reset-icon::before {
  top: 5px;
  left: -4px;
  width: 22px;
  height: 2px;
}

.camera-reset-icon::after {
  top: -4px;
  left: 5px;
  width: 2px;
  height: 22px;
}

.trajectory-scene {
  position: relative;
  display: block;
  width: var(--ds-page);
  height: clamp(340px, 56vh, 680px);
  margin: 16px auto 14px;
  border: 1px solid rgba(40, 191, 184, 0.22);
  border-radius: var(--ds-radius);
  background: var(--ds-night);
  cursor: grab;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

.trajectory-scene.is-dragging {
  cursor: grabbing;
}

.trajectory-canvas,
.trajectory-scene .cesium-widget,
.trajectory-scene .cesium-widget canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: inherit;
  touch-action: none;
}

.trajectory-notice {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  max-width: min(420px, calc(100% - 28px));
  padding: 10px 12px;
  border: 1px solid rgba(40, 191, 184, 0.28);
  border-radius: var(--ds-radius);
  background: rgba(7, 24, 23, 0.78);
  color: #edf9f6;
  font-size: 0.88rem;
}

.scrubber {
  display: block;
  width: var(--ds-page);
  margin: 0 auto;
  accent-color: var(--ds-amber);
}

.analysis-chart {
  display: block;
  width: 100%;
  height: 320px;
}

.chart-panel[hidden] {
  display: none;
}

.panel-stack {
  display: grid;
  align-content: start;
  gap: 18px;
}

.details-form {
  display: grid;
  gap: 10px;
}

.details-form label {
  color: var(--ds-muted);
  font-size: 0.82rem;
}

.details-form input,
.details-form textarea {
  width: 100%;
  min-height: 40px;
  padding: 9px 10px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: var(--ds-panel-2);
  color: var(--ds-ink);
}

.details-form input:focus,
.details-form textarea:focus {
  outline: 2px solid rgba(40, 191, 184, 0.28);
  outline-offset: 1px;
  border-color: var(--ds-teal);
}

.details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.details-grid div {
  padding: 12px;
  border-radius: var(--ds-radius);
  background: var(--ds-bg-2);
}

.details-grid dt {
  margin-bottom: 5px;
}

.details-grid dd {
  margin: 0;
  font-weight: 740;
}

.danger-panel {
  border-color: rgba(184, 35, 24, 0.26);
}

.error-text {
  color: var(--ds-red);
  font-weight: 740;
}

@media (max-width: 920px) {
  :root {
    --ds-page: min(100vw - 28px, 720px);
  }

  .app-header {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 14px 18px;
  }

  .brand {
    min-width: 0;
  }

  .main-nav,
  .locale-switch {
    flex-wrap: wrap;
  }

  .page-heading,
  .upload-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .page-heading h1 {
    font-size: 2.35rem;
  }

  .dashboard-grid,
  .content-split,
  .charts-grid,
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .stats-panel,
  .details-grid {
    grid-template-columns: 1fr;
  }

  .metric-strip {
    gap: 0;
  }

  .stat strong,
  .metric-strip strong {
    font-size: 1.85rem;
  }
}