:root {
  color-scheme: dark;
  --bg: #040708;
  --bg-deep: #010304;
  --panel: rgba(7, 18, 23, .92);
  --panel-soft: rgba(10, 27, 32, .62);
  --line: rgba(127, 229, 225, .2);
  --line-strong: rgba(127, 229, 225, .56);
  --text: #effffb;
  --muted: rgba(239, 255, 251, .72);
  --dim: rgba(239, 255, 251, .48);
  --cyan: #7fe5e1;
  --cyan-bright: #c7fffb;
  --amber: #ffd179;
  --violet: #c5a3ff;
  --green: #9cf2b4;
  --red: #ff8b92;
  --orbit-inner: #69d7ff;
  --orbit-outer: #ff7f5a;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 0;
  overflow-x: hidden;
  background: var(--bg);
}

body {
  min-width: 0;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 48% -8%, rgba(62, 136, 151, .24), transparent 35rem),
    linear-gradient(rgba(127, 229, 225, .032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 229, 225, .032) 1px, transparent 1px),
    var(--bg-deep);
  background-size: auto, 32px 32px, 32px 32px, auto;
  font-family: "SFMono-Regular", "Cascadia Code", "Roboto Mono", "Noto Sans Mono", "Yu Gothic UI", monospace;
  line-height: 1.55;
}

button,
input,
output {
  font: inherit;
}

button,
input[type="range"],
input[type="checkbox"] {
  accent-color: var(--cyan);
}

button {
  min-width: 0;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--text);
  background: rgba(1, 13, 17, .9);
  cursor: pointer;
  letter-spacing: .04em;
  text-align: center;
}

button:hover {
  border-color: var(--line-strong);
  background: rgba(23, 67, 72, .52);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
#orbitCanvas:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

button:active {
  transform: translateY(1px);
}

button.button-primary {
  border-color: rgba(255, 209, 121, .7);
  color: #161007;
  background: var(--amber);
  font-weight: 700;
}

button.button-primary:hover {
  border-color: #fff0c4;
  background: #ffe2a6;
}

.skip-link {
  position: fixed;
  top: 0;
  left: max(8px, env(safe-area-inset-left));
  z-index: 2147483647;
  padding: 10px 14px;
  border: 2px solid #76f7ed;
  border-radius: 4px;
  color: #f2f1df;
  background: #080907;
  font: 700 .9rem/1.3 "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
  text-decoration: none;
  transform: translateY(-150%);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: max(8px, env(safe-area-inset-top));
  outline: 3px solid rgba(118, 247, 238, .36);
  outline-offset: 2px;
  transform: translateY(0);
}

.site-frame {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 42px;
}

.site-header {
  padding: 4px 0 20px;
  border-bottom: 1px solid var(--line);
}

.prototype-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin: 0;
  color: var(--dim);
  font-size: .78rem;
  line-height: 1.5;
}

.prototype-breadcrumb a,
.section-nav a,
.site-footer a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}

.prototype-breadcrumb a:hover,
.section-nav a:hover,
.site-footer a:hover {
  color: var(--cyan-bright);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 18px;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  color: var(--amber);
  font-size: .78rem;
  letter-spacing: .05em;
  box-shadow: 0 0 20px rgba(127, 229, 225, .12);
}

.brand-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-copy strong {
  overflow-wrap: anywhere;
  font-size: .98rem;
  letter-spacing: .07em;
}

.brand-copy small {
  color: var(--dim);
  font-size: .67rem;
  letter-spacing: .1em;
}

.section-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  color: var(--muted);
  font-size: .75rem;
  letter-spacing: .12em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 330px);
  gap: 26px;
  align-items: end;
  padding: 44px 0 30px;
}

.hero-copy,
.status-rack,
.observation-panel,
.control-panel,
.note-card {
  min-width: 0;
}

.kicker {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
dd,
dt,
button,
label {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 650;
}

h1 {
  color: var(--cyan-bright);
  font-size: 3rem;
  line-height: 1.08;
  letter-spacing: .04em;
}

.hero-subtitle {
  margin: 7px 0 0;
  color: var(--amber);
  font-size: clamp(.95rem, 1.8vw, 1.3rem);
  letter-spacing: .07em;
}

.hero-lead {
  display: grid;
  gap: 4px;
  max-width: 860px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: .9rem;
}

.status-rack {
  display: grid;
  gap: 6px;
  align-self: stretch;
  align-content: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  color: var(--muted);
  background: linear-gradient(145deg, rgba(19, 47, 50, .7), rgba(2, 11, 13, .78));
  font-size: .72rem;
  letter-spacing: .055em;
}

.status-rack strong {
  color: var(--cyan-bright);
  font-size: .82rem;
}

.live-message {
  padding-top: 6px;
  border-top: 1px solid rgba(127, 229, 225, .14);
  color: var(--amber);
}

.status-label {
  color: var(--amber);
  font-size: .66rem;
  letter-spacing: .14em;
}

.observatory-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 370px);
  gap: 18px;
  align-items: start;
}

.observation-panel,
.control-panel,
.note-card {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--panel), rgba(2, 9, 11, .94));
  box-shadow: 0 0 34px rgba(68, 242, 230, .05);
}

.observation-panel {
  padding: 18px;
}

.control-panel {
  display: grid;
  gap: 16px;
  padding: 18px;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.compact-heading {
  margin-bottom: 0;
}

.panel-heading h2 {
  color: var(--text);
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  letter-spacing: .04em;
}

.stage-readout {
  display: grid;
  flex: 0 0 auto;
  gap: 2px;
  min-width: 116px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(0, 15, 18, .72);
  text-align: right;
}

.stage-readout span,
.panel-index,
.readout-list dt {
  color: var(--dim);
  font-size: .62rem;
  letter-spacing: .13em;
}

.stage-readout strong {
  color: var(--amber);
  font-size: .72rem;
  font-weight: 500;
}

.panel-index {
  padding-top: 4px;
  color: var(--amber);
  white-space: nowrap;
}

.stage {
  position: relative;
  overflow: hidden;
  min-width: 0;
  min-height: 480px;
  border: 1px solid rgba(127, 229, 225, .34);
  background:
    radial-gradient(circle at 50% 50%, rgba(33, 100, 118, .22), transparent 46%),
    #020506;
}

#orbitCanvas {
  display: block;
  width: 100%;
  height: clamp(480px, 52vw, 680px);
  min-height: 480px;
  max-height: 72vh;
  touch-action: none;
}

.stage-hud {
  position: absolute;
  z-index: 1;
  top: 12px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: rgba(239, 255, 251, .62);
  font-size: .63rem;
  letter-spacing: .12em;
  pointer-events: none;
}

.fallback {
  position: absolute;
  z-index: 2;
  inset: 50% 20px auto;
  margin: 0;
  padding: 14px;
  transform: translateY(-50%);
  border: 1px solid rgba(255, 139, 146, .58);
  color: #ffd6d1;
  background: rgba(40, 9, 12, .92);
  text-align: center;
}

.stage-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .075em;
}

.stage-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-swatch {
  display: inline-block;
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-inner {
  background: var(--orbit-inner);
  box-shadow: 0 0 8px rgba(105, 215, 255, .7);
}

.legend-outer {
  background: var(--orbit-outer);
  box-shadow: 0 0 8px rgba(255, 127, 90, .7);
}

.legend-conjunction {
  border: 1px solid var(--violet);
  background: transparent;
  box-shadow: 0 0 7px rgba(197, 163, 255, .5);
}

.legend-trail {
  border-radius: 0;
  background: linear-gradient(90deg, var(--green), transparent);
}

.canvas-help {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-left: 2px solid var(--cyan);
  color: var(--dim);
  background: rgba(0, 11, 14, .58);
  font-size: .67rem;
  line-height: 1.65;
}

.canvas-help strong {
  color: var(--cyan-bright);
}

.control-group,
.readout-list {
  min-width: 0;
  margin: 0;
  border: 1px solid rgba(127, 229, 225, .15);
  background: var(--panel-soft);
}

.control-group {
  display: grid;
  gap: 9px;
  padding: 13px;
}

.control-group h3 {
  margin: -2px 0 2px;
  padding: 0;
  color: var(--cyan);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .14em;
}

.preset-controls {
  gap: 8px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.preset-button {
  display: grid;
  gap: 2px;
  align-content: center;
  min-height: 58px;
  padding: 7px 9px;
  text-align: left;
}

.preset-button.is-active,
.preset-button[aria-pressed="true"] {
  border-color: rgba(255, 209, 121, .64);
  background: rgba(255, 209, 121, .1);
}

.preset-button strong {
  color: var(--text);
  font-size: .74rem;
  letter-spacing: .08em;
}

.preset-button small {
  color: var(--dim);
  font-size: .61rem;
}

.range-label {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  min-width: 0;
  color: var(--muted);
  font-size: .7rem;
}

.range-label output {
  flex: 0 0 auto;
  color: var(--amber);
  white-space: nowrap;
}

input[type="range"] {
  width: 100%;
  min-height: 44px;
  margin: 0;
  cursor: pointer;
}

.range-endpoints {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--dim);
  font-size: .6rem;
}

.control-hint,
.small-note {
  margin: 0;
  color: var(--dim);
  font-size: .67rem;
  line-height: 1.65;
}

.display-options {
  gap: 7px;
}

.check-option {
  display: flex;
  min-width: 0;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border: 1px solid rgba(127, 229, 225, .16);
  color: var(--muted);
  cursor: pointer;
  font-size: .7rem;
  letter-spacing: .04em;
}

.check-option:has(input:checked) {
  border-color: rgba(255, 209, 121, .54);
  color: var(--text);
  background: rgba(255, 209, 121, .08);
}

.check-option input {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 0;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.readout-list {
  display: grid;
  gap: 0;
  padding: 0;
}

.readout-list div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, auto);
  gap: 12px;
  align-items: center;
  padding: 9px 12px;
  border-bottom: 1px solid rgba(127, 229, 225, .11);
}

.readout-list div:last-child {
  border-bottom: 0;
}

.readout-list dd {
  min-width: 0;
  margin: 0;
  color: var(--text);
  font-size: .72rem;
  text-align: right;
}

.notes {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.notes-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.notes-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.note-card {
  padding: 18px;
}

.note-card h2 {
  color: var(--text);
  font-size: clamp(1rem, 1.8vw, 1.28rem);
  line-height: 1.35;
}

.note-card p,
.note-card li {
  color: var(--muted);
  font-size: .77rem;
  line-height: 1.8;
}

.note-card p {
  margin: 12px 0 0;
}

.note-card ol,
.note-card ul {
  margin: 12px 0 0;
  padding-left: 1.35em;
}

.note-card li + li {
  margin-top: 6px;
}

.note-card strong {
  color: var(--cyan-bright);
  font-weight: 600;
}

.note-emphasis {
  color: var(--amber) !important;
}

.formula-card {
  background: linear-gradient(145deg, rgba(17, 35, 43, .94), rgba(3, 12, 15, .96));
}

.formula {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  padding: 12px;
  border-left: 2px solid var(--amber);
  background: rgba(0, 5, 8, .58);
}

.formula code {
  color: var(--cyan-bright);
  font-size: .83rem;
  white-space: normal;
  overflow-wrap: anywhere;
}

.formula sup,
.formula sub {
  font-size: .72em;
}

.limit-list {
  list-style: "—  ";
}

.noscript-notice {
  position: relative;
  z-index: 3;
  margin: 18px;
  padding: 14px;
  border: 1px solid rgba(255, 139, 146, .58);
  color: #ffd6d1;
  background: rgba(40, 9, 12, .86);
  font-size: .78rem;
}

.noscript-notice span {
  color: rgba(255, 214, 209, .76);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: .68rem;
}

.site-footer > span {
  color: var(--muted);
}

.public-site-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-left: auto;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .status-rack {
    max-width: 540px;
  }

  .observatory-layout {
    grid-template-columns: 1fr;
  }

  .notes-three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .notes-three .note-card:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  .site-frame {
    width: min(100% - 20px, 1480px);
    padding-top: 14px;
  }

  .header-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .section-nav {
    justify-content: flex-start;
  }

  .hero {
    padding: 30px 0 22px;
  }

  h1 {
    font-size: 2rem;
  }

  .hero-lead {
    font-size: .78rem;
  }

  .observation-panel,
  .control-panel,
  .note-card {
    padding: 13px;
  }

  .panel-heading {
    gap: 10px;
  }

  .stage-readout {
    min-width: 96px;
    padding: 7px;
  }

  .stage {
    min-height: 460px;
  }

  #orbitCanvas {
    height: min(118vw, 560px);
    min-height: 460px;
    max-height: none;
  }

  .stage-hud {
    display: grid;
    gap: 2px;
    font-size: .55rem;
  }

  .stage-legend {
    gap: 7px 12px;
    font-size: .61rem;
  }

  .canvas-help {
    font-size: .63rem;
  }

  .preset-grid,
  .action-grid,
  .notes-three,
  .notes-two {
    grid-template-columns: 1fr;
  }

  .notes-three .note-card:last-child {
    grid-column: auto;
  }

  .notes {
    gap: 12px;
  }

  .readout-list div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .readout-list dd {
    text-align: left;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .public-site-footer-nav {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}