:root {
  color-scheme: light;
  --canvas: #faf9f8;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-solid: #ffffff;
  --ink: #292431;
  --muted: #6d6872;
  --line: #e2dde4;
  --line-strong: #cdc5d0;
  --lavender: #8467a6;
  --lavender-deep: #634b80;
  --lavender-soft: #eee9f2;
  --peach: #c9815d;
  --peach-soft: #f4e1d7;
  --sage: #59836e;
  --sage-soft: #dce9e2;
  --rose: #b15f73;
  --danger: #a84747;
  --space: #211b2a;
  --shadow: 0 12px 34px rgba(61, 45, 67, 0.065);
  --shadow-deep: 0 20px 54px rgba(32, 25, 39, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.shell {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 0 30px 80px;
}

.masthead,
.control-heading,
.result-heading,
.visual-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.masthead {
  min-height: 70px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 680;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand em {
  color: var(--lavender-deep);
  font-style: normal;
  font-weight: 560;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.brand-mark::before,
.brand-mark i {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--canvas);
  border-radius: 50%;
}

.brand-mark::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 8px;
  border: 1px solid rgba(255, 250, 247, 0.72);
  border-radius: 50%;
  transform: rotate(-28deg);
}

.brand-mark i {
  width: 4px;
  height: 4px;
  border: 0;
  background: var(--peach);
}

.masthead-meta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 0.78rem;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
  margin-right: 28px;
}

.primary-nav a {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 620;
  text-decoration: none;
}

.primary-nav a:hover {
  color: var(--ink);
}

.stage-chip,
.tech-badge {
  border: 1px solid rgba(141, 107, 184, 0.28);
  border-radius: 999px;
  background: rgba(238, 228, 245, 0.58);
  color: var(--lavender-deep);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stage-chip {
  padding: 4px 9px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(360px, 0.84fr) minmax(520px, 1.16fr);
  gap: clamp(32px, 4.5vw, 62px);
  align-items: center;
  min-height: 570px;
  padding: 46px 0 50px;
}

.study-summary {
  padding: 8px 0;
}

.kicker,
.section-index {
  margin: 0 0 9px;
  color: var(--lavender-deep);
  font-size: 0.74rem;
  font-weight: 720;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 670px;
  margin-bottom: 18px;
  font-size: clamp(2rem, 3vw, 2.7rem);
  font-weight: 620;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.lede {
  max-width: 650px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.25vw, 1.05rem);
}

.research-metadata {
  margin: 0;
  border-top: 1px solid var(--line);
}

.research-metadata div {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}

.research-metadata dt,
.research-metadata dd {
  margin: 0;
  font-size: 0.78rem;
}

.research-metadata dt {
  color: var(--muted);
  font-weight: 650;
}

.research-metadata dd {
  color: var(--ink);
}

.scope-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.scope-note strong {
  color: var(--ink);
}

.method-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
}

.method-tags span {
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-solid);
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 650;
}

h2,
h3 {
  margin-bottom: 0;
  font-weight: 650;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.55rem, 3.4vw, 2.25rem);
}

h3 {
  font-size: 1.2rem;
}

.globe-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 16px;
  background: var(--space);
  color: #fffaf7;
  box-shadow: var(--shadow-deep);
}

.globe-heading {
  padding: 18px 20px 15px;
}

.globe-heading .section-index {
  color: #c8aadf;
}

.globe-heading h2 {
  font-size: 1.18rem;
}

.tech-badge {
  padding: 6px 10px;
  border-color: rgba(219, 186, 237, 0.25);
  background: rgba(219, 186, 237, 0.09);
  color: #e0c9ed;
}

.globe-frame {
  position: relative;
  min-height: 390px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background:
    radial-gradient(circle at 50% 40%, rgba(141, 107, 184, 0.22), transparent 42%),
    linear-gradient(150deg, #211b2a, #17131d);
}

#mission-globe,
#mission-globe .cesium-viewer,
#mission-globe .cesium-viewer-cesiumWidgetContainer,
#mission-globe .cesium-widget,
#mission-globe canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#mission-globe .cesium-viewer-bottom {
  right: 12px;
  bottom: 10px;
  left: auto;
}

#mission-globe .cesium-widget-credits {
  color: rgba(255, 255, 255, 0.5);
  font-size: 9px;
}

.globe-loading {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: opacity 280ms ease;
}

.globe-loading.is-hidden {
  visibility: hidden;
  opacity: 0;
}

.orbit-loader {
  position: relative;
  width: 94px;
  height: 94px;
  border: 1px solid rgba(224, 201, 237, 0.36);
  border-radius: 50%;
  background: radial-gradient(circle at 42% 36%, #a990bd, #4f425f 54%, #292230 55%);
  box-shadow: 0 0 46px rgba(141, 107, 184, 0.28);
}

.orbit-loader::before {
  content: "";
  position: absolute;
  inset: 40px -22px;
  border: 1px solid rgba(217, 144, 102, 0.8);
  border-radius: 50%;
  transform: rotate(-24deg);
}

.fallback-globe {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.fallback-globe-core {
  width: min(330px, 68%);
  aspect-ratio: 1;
  border: 1px solid rgba(224, 201, 237, 0.42);
  border-radius: 50%;
  background:
    linear-gradient(24deg, transparent 47%, rgba(224, 201, 237, 0.2) 48%, transparent 49%),
    linear-gradient(-18deg, transparent 46%, rgba(217, 144, 102, 0.18) 47%, transparent 48%),
    radial-gradient(circle at 38% 32%, #9480a4, #554660 56%, #302638 57%);
  box-shadow: 0 0 70px rgba(141, 107, 184, 0.3);
}

.fallback-marker {
  position: absolute;
  top: var(--marker-y);
  left: var(--marker-x);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--peach);
  box-shadow: 0 0 0 5px rgba(217, 144, 102, 0.14);
}

.fallback-marker.is-scheduled {
  width: 10px;
  height: 10px;
  background: #d6a9e9;
  box-shadow: 0 0 0 6px rgba(214, 169, 233, 0.16);
}

.globe-overlay {
  position: absolute;
  z-index: 1;
  top: 18px;
  left: 18px;
  display: grid;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: rgba(26, 21, 32, 0.62);
  backdrop-filter: blur(10px);
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.68rem;
  pointer-events: none;
}

.globe-overlay span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.globe-overlay i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d6a9e9;
  box-shadow: 0 0 0 4px rgba(214, 169, 233, 0.14);
}

.globe-overlay span:last-child i {
  background: #d99066;
  box-shadow: 0 0 0 4px rgba(217, 144, 102, 0.14);
}

.globe-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px 16px;
  color: rgba(255, 255, 255, 0.65);
}

.globe-footer p,
.globe-footer small {
  margin: 0;
}

.globe-footer p {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.77rem;
}

.globe-footer strong {
  color: #fffaf7;
}

.globe-footer small {
  font-size: 0.68rem;
}

.control-surface,
.visual-block {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.control-surface {
  padding: 24px 26px;
  border-radius: 14px;
}

.context,
.status,
.runtime {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

form {
  display: grid;
  grid-template-columns: 1.45fr 1.3fr 0.6fr 0.92fr auto;
  gap: 13px;
  align-items: end;
  margin-top: 23px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
}

select,
input,
button {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 13px;
  font: inherit;
}

select,
input {
  padding: 0 12px;
  background: var(--surface-solid);
  color: var(--ink);
}

button {
  padding: 0 19px;
  border-color: var(--ink);
  background: var(--ink);
  color: var(--canvas);
  cursor: pointer;
  font-weight: 680;
  white-space: nowrap;
}

button span {
  margin-left: 10px;
}

button:hover {
  transform: translateY(-1px);
}

button:disabled {
  cursor: wait;
  opacity: 0.58;
  transform: none;
}

select:focus-visible,
input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(141, 107, 184, 0.35);
  outline-offset: 2px;
}

.status {
  min-height: 1.4em;
  margin-top: 13px;
}

.status.error {
  color: var(--danger);
}

.results {
  padding-top: 52px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 13px;
  margin: 25px 0 18px;
}

.metric-grid article {
  position: relative;
  min-height: 144px;
  overflow: hidden;
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-solid);
}

.metric-grid article::after {
  content: "";
  position: absolute;
  right: -22px;
  bottom: -42px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--lavender-soft), transparent 70%);
}

.metric-grid span,
.metric-grid small {
  color: var(--muted);
}

.metric-grid span {
  font-size: 0.78rem;
  font-weight: 650;
}

.metric-grid strong {
  position: relative;
  z-index: 1;
  display: block;
  margin: 11px 0 3px;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 580;
  letter-spacing: -0.055em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.metric-grid small {
  font-size: 0.76rem;
}

.feasible-metric strong {
  color: var(--sage);
}

.visual-block {
  padding: 24px;
  border-radius: 14px;
}

.visual-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 11px;
  color: var(--muted);
  font-size: 0.73rem;
}

.legend span {
  white-space: nowrap;
}

.swatch {
  display: inline-block;
  width: 17px;
  height: 7px;
  margin-right: 5px;
  border-radius: 999px;
}

.visibility {
  border: 1px solid #cebadd;
  background: var(--lavender-soft);
}

.observation,
.energy,
.objective {
  background: var(--lavender);
}

.slew,
.storage,
.epsilon {
  background: var(--peach);
}

.td-error {
  background: var(--sage);
}

.chart-host {
  min-height: 240px;
  margin-top: 20px;
}

.gantt-host {
  min-height: 250px;
}

.chart-host svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart-grid {
  stroke: var(--line);
  stroke-width: 1;
}

.chart-grid-strong {
  stroke: var(--line-strong);
  stroke-width: 1;
}

.row-band {
  fill: rgba(238, 228, 245, 0.26);
}

.chart-axis,
.chart-label,
.task-label,
.task-sublabel {
  fill: var(--muted);
  font-size: 12px;
}

.task-label {
  fill: var(--ink);
  font-size: 12px;
  font-weight: 680;
}

.task-sublabel {
  font-size: 10px;
}

.chart-title-label {
  fill: var(--ink);
  font-size: 11px;
  font-weight: 680;
}

.chart-panel-label {
  fill: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.window-bar {
  fill: var(--lavender-soft);
  stroke: #d4c2e1;
  stroke-width: 1;
}

.task-bar {
  fill: var(--lavender-deep);
  filter: drop-shadow(0 3px 5px rgba(111, 77, 159, 0.24));
}

.slew-bar {
  fill: var(--peach);
}

.unscheduled-dot {
  fill: #cabfca;
}

.energy-area {
  fill: url(#energy-gradient);
}

.energy-line,
.objective-line,
.convergence-line {
  fill: none;
  stroke: var(--lavender-deep);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3;
}

.storage-line,
.epsilon-line {
  fill: none;
  stroke: var(--peach);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.5;
}

.epsilon-line {
  stroke-dasharray: 6 5;
}

.td-line {
  fill: none;
  stroke: var(--sage);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.5;
}

.chart-point {
  fill: var(--surface-solid);
  stroke: var(--lavender-deep);
  stroke-width: 2;
}

.chart-empty {
  display: grid;
  min-height: 230px;
  place-items: center;
  color: var(--muted);
  text-align: center;
}

.evidence-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 254, 253, 0.74);
}

.evidence-strip div {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
}

.evidence-strip div + div {
  border-left: 1px solid var(--line);
}

.evidence-strip span {
  display: grid;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--lavender-soft);
  color: var(--lavender-deep);
  font-size: 0.7rem;
  font-weight: 750;
}

.evidence-strip p {
  display: grid;
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.evidence-strip strong {
  color: var(--ink);
  font-size: 0.88rem;
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 42px;
  }

  .study-summary {
    max-width: 800px;
  }

  .globe-card {
    width: min(760px, 100%);
  }

  form {
    grid-template-columns: repeat(2, 1fr);
  }

  button {
    grid-column: 1 / -1;
  }

  .metric-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 800px) {
  .primary-nav {
    display: none;
  }

  .visual-pair,
  .evidence-strip {
    grid-template-columns: 1fr;
  }

  .evidence-strip div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 18px 16px 54px;
  }

  .masthead-meta > span:not(.stage-chip):not(.live-dot) {
    display: none;
  }

  .hero {
    min-height: 0;
    gap: 28px;
    padding: 34px 0 38px;
  }

  h1 {
    font-size: clamp(1.9rem, 9vw, 2.45rem);
  }

  .globe-card {
    border-radius: 22px;
  }

  .globe-frame {
    min-height: 330px;
  }

  .globe-footer,
  .control-heading,
  .result-heading,
  .visual-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .globe-footer p {
    flex-wrap: wrap;
  }

  .control-surface,
  .visual-block {
    padding: 20px;
    border-radius: 18px;
  }

  form,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid article {
    min-height: 124px;
  }

  .legend {
    justify-content: flex-start;
  }

  .chart-host {
    overflow-x: auto;
  }

  .chart-host svg {
    min-width: 620px;
  }

  .gantt-host svg {
    min-width: 920px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  button {
    transition: transform 160ms ease, opacity 160ms ease;
  }

  .orbit-loader::before {
    animation: orbit-spin 4s linear infinite;
  }
}

@keyframes orbit-spin {
  to {
    transform: rotate(336deg);
  }
}