:root {
  --bg: #0f1220;
  --bg-rgb: 15, 18, 32;
  --panel: #171b2e;
  --panel-rgb: 23, 27, 46;
  --panel-2: #1d2240;
  --text: #e8e9f3;
  --muted: #a6abcc;
  --overlay-color: 255, 255, 255;
  --accent: #7eb2ff;
  --accent-rgb: 126, 178, 255;
  --border: rgba(var(--overlay-color), 0.12);
  --focus: rgba(var(--accent-rgb), 0.45);
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.38);
  --orbit-motion-ms: 760ms;
  --orbit-motion-ease: cubic-bezier(0.2, 0.78, 0.2, 1);
}

[data-theme="light"] {
  --bg: #f0f1f5;
  --bg-rgb: 240, 241, 245;
  --panel: #ffffff;
  --panel-rgb: 255, 255, 255;
  --panel-2: #f5f6fa;
  --text: #1a1d2e;
  --muted: #5a5f7a;
  --overlay-color: 0, 0, 0;
  --accent: #3070c8;
  --accent-rgb: 48, 112, 200;
  --border: rgba(var(--overlay-color), 0.15);
  --focus: rgba(var(--accent-rgb), 0.32);
  --shadow: 0 12px 26px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  color: var(--text);
  font-family: "Segoe UI", "Trebuchet MS", "Gill Sans", "Lucida Sans", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(var(--accent-rgb), 0.24), transparent 38%),
    radial-gradient(circle at 88% 0%, rgba(var(--accent-rgb), 0.16), transparent 42%),
    radial-gradient(circle at 48% 100%, rgba(var(--accent-rgb), 0.12), transparent 45%), var(--bg);
  line-height: 1.5;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 0.6rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.45rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(var(--accent-rgb), 0.45);
  background: rgba(var(--panel-rgb), 0.96);
  color: var(--text);
  text-decoration: none;
  transition: top 160ms ease;
}

.skip-link:focus {
  top: 0.6rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: min(1160px, calc(100% - 2rem));
  margin: 1rem auto 2rem;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--bg-rgb), 0.7);
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand__mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(
    135deg,
    rgba(var(--overlay-color), 0.16),
    rgba(var(--overlay-color), 0.04)
  );
  border: 1px solid var(--border);
}

.brand__title {
  margin: 0;
  font-size: clamp(1rem, 2.6vw, 1.25rem);
}

.brand__subtitle {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.theme-toggle {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(var(--overlay-color), 0.08);
  color: var(--text);
  min-width: 92px;
  height: 38px;
  padding: 0 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  transition:
    background 180ms ease,
    border-color 180ms ease;
}

.theme-toggle:hover {
  background: rgba(var(--overlay-color), 0.15);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.theme-toggle__moon {
  display: none;
}

[data-theme="light"] .theme-toggle__sun {
  display: none;
}

[data-theme="light"] .theme-toggle__moon {
  display: inline;
}

.site-main {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(var(--panel-rgb), 0.94), rgba(var(--panel-rgb), 0.82));
  box-shadow: var(--shadow);
}

.hero {
  padding: 1.25rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
}

.hero h2 {
  margin: 0.35rem 0 0.4rem;
  font-size: clamp(1.35rem, 4vw, 2rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 64ch;
}

.project-shell {
  display: grid;
  grid-template-columns: minmax(240px, 330px) 1fr;
  gap: 1rem;
}

.panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 1rem;
}

.panel__header h3 {
  margin: 0;
  font-size: 1rem;
}

.project-nav {
  min-height: 420px;
  display: grid;
  grid-template-rows: auto 1fr;
}

.project-list {
  position: absolute;
  inset: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.project-list__empty {
  color: var(--muted);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1rem;
}

.constellation-stage {
  position: relative;
  min-height: 355px;
  overflow: hidden;
  border-radius: 0 0 var(--radius) var(--radius);
  background:
    radial-gradient(circle at 42% 38%, rgba(var(--accent-rgb), 0.15), transparent 42%),
    radial-gradient(circle at 60% 70%, rgba(var(--accent-rgb), 0.1), transparent 44%),
    rgba(var(--panel-rgb), 0.26);
}

.constellation-stage:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: -2px;
  box-shadow:
    inset 0 0 0 1px rgba(var(--accent-rgb), 0.5),
    0 0 0 2px rgba(var(--accent-rgb), 0.25);
}

.constellation-stage__links {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.orbit-path {
  fill: none;
  stroke: rgba(var(--accent-rgb), 0.2);
  stroke-width: 1.2;
  stroke-dasharray: 5 7;
}

.constellation-link {
  stroke: rgba(var(--accent-rgb), 0.22);
  stroke-width: 1.7;
  stroke-linecap: round;
  transition:
    stroke 220ms ease,
    stroke-width 220ms ease,
    opacity 220ms ease;
}

.constellation-link.is-active {
  stroke: rgba(var(--accent-rgb), 0.52);
}

.constellation-link.is-hover {
  stroke: rgba(var(--accent-rgb), 0.9);
  stroke-width: 2.2;
}

.constellation-dot {
  fill: rgba(var(--accent-rgb), 0.55);
}

.constellation-dot.is-active {
  fill: rgba(var(--accent-rgb), 1);
}

.constellation-dot.is-hover {
  fill: rgba(var(--accent-rgb), 0.95);
}

.project-orbit {
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(calc(var(--center-x) * 1px), calc(var(--center-y) * 1px))
    translate(-50%, -50%) rotate(calc(var(--node-angle) * 1deg))
    translateX(calc(var(--orbit-radius) * 1px)) scale(var(--node-scale));
  transform-origin: center;
  will-change: transform, opacity;
  backface-visibility: hidden;
  transition:
    transform var(--orbit-motion-ms) var(--orbit-motion-ease),
    opacity 320ms ease,
    filter 280ms ease;
  opacity: var(--node-opacity);
  z-index: var(--node-z);
}

.project-orbit[data-node-state="active"] .project-node {
  border-color: rgba(var(--accent-rgb), 0.7);
  box-shadow:
    0 0 0 1px rgba(var(--accent-rgb), 0.25),
    0 12px 24px rgba(0, 0, 0, 0.35);
}

.project-orbit[data-node-state="faded"] {
  filter: saturate(0.8);
}

.project-orbit[data-placeholder="true"] .project-node {
  border-style: dashed;
  border-color: rgba(var(--overlay-color), 0.24);
  background: rgba(var(--overlay-color), 0.05);
}

.project-orbit[data-placeholder="true"] .project-node__dot {
  background: transparent;
  border: 1px solid rgba(var(--accent-rgb), 0.65);
  box-shadow: none;
}

.project-node {
  width: clamp(138px, 34vw, 190px);
  display: grid;
  gap: 0.26rem;
  text-align: left;
  color: var(--text);
  background: rgba(var(--overlay-color), 0.08);
  border: 1px solid rgba(var(--overlay-color), 0.2);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.8rem;
  cursor: pointer;
  transform: rotate(calc(var(--node-angle) * -1deg)) translateY(0);
  will-change: transform;
  transition:
    transform var(--orbit-motion-ms) var(--orbit-motion-ease),
    border-color 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease;
}

.project-node:hover {
  transform: rotate(calc(var(--node-angle) * -1deg)) translateY(-0.5px);
  background: rgba(var(--accent-rgb), 0.16);
}

.project-node:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.2);
}

.project-node.is-active {
  border-color: rgba(var(--accent-rgb), 0.7);
  background: rgba(var(--accent-rgb), 0.2);
}

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

.project-node__name {
  margin: 0;
  font-weight: 600;
  font-size: 0.92rem;
}

.project-node__meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.project-node__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.25);
  background: var(--accent);
}

.constellation-stage__hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0.7rem 0.85rem;
  color: var(--muted);
  font-size: 0.8rem;
  background: linear-gradient(to top, rgba(var(--panel-rgb), 0.76), rgba(var(--panel-rgb), 0));
  pointer-events: none;
}

.project-detail {
  display: grid;
  grid-template-rows: auto 1fr auto;
  transition:
    border-color 220ms ease,
    transform 260ms ease;
}

.project-detail.is-refreshing {
  border-color: rgba(var(--accent-rgb), 0.45);
  transform: translateY(-2px);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  border-radius: 999px;
  border: 1px solid var(--border);
  padding: 0.14rem 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  color: var(--muted);
}

.status-badge[data-status="live"] {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.45);
  background: rgba(var(--accent-rgb), 0.14);
}

.status-badge[data-status="wip"] {
  color: #ffd37c;
  border-color: rgba(255, 211, 124, 0.55);
  background: rgba(255, 211, 124, 0.14);
}

.status-badge[data-status="planned"] {
  color: var(--muted);
  border-color: rgba(var(--overlay-color), 0.28);
  background: rgba(var(--overlay-color), 0.08);
}

.project-detail__description {
  margin: 0;
  padding: 1rem;
  color: var(--text);
}

.project-meta {
  margin: 0;
  padding: 0 1rem 1rem;
  display: grid;
  gap: 0.1rem;
}

.project-meta dt {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.project-meta dd {
  margin: 0;
}

.project-detail__actions {
  padding: 0 1rem 1rem;
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 0.9rem;
  border-radius: 10px;
  border: 1px solid rgba(var(--accent-rgb), 0.4);
  background: rgba(var(--accent-rgb), 0.18);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.action-link:hover {
  background: rgba(var(--accent-rgb), 0.26);
}

.action-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.2);
}

.action-link.is-disabled {
  opacity: 0.52;
  pointer-events: none;
}

.site-footer {
  margin-top: 1rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.86rem;
}

.noscript {
  width: min(1160px, calc(100% - 2rem));
  margin: 0.6rem auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 80, 80, 0.12);
  color: var(--text);
  padding: 0.75rem;
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .project-shell {
    grid-template-columns: 1fr;
  }

  .site-shell {
    width: calc(100% - 1rem);
    margin-top: 0.5rem;
  }

  .site-header {
    padding: 0.75rem;
  }

  .theme-toggle {
    min-width: 84px;
  }

  .project-nav {
    min-height: 380px;
  }

  .constellation-stage {
    min-height: 315px;
  }

  .project-node {
    width: clamp(132px, 46vw, 180px);
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: calc(100% - 0.75rem);
    margin: 0.4rem auto 1rem;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 0.7rem;
  }

  .theme-toggle {
    align-self: flex-end;
  }

  .hero {
    padding: 1rem;
  }

  .panel__header {
    padding: 0.7rem 0.8rem;
  }

  .constellation-stage {
    min-height: 290px;
  }

  .constellation-stage__hint {
    font-size: 0.75rem;
    padding: 0.55rem 0.7rem;
  }

  .project-detail__description,
  .project-meta,
  .project-detail__actions {
    padding-left: 0.8rem;
    padding-right: 0.8rem;
  }

  .project-node {
    width: clamp(124px, 58vw, 170px);
    min-height: 54px;
  }

  .project-node__meta {
    font-size: 0.74rem;
  }
}

@media (max-width: 420px) {
  .project-nav {
    min-height: 350px;
  }

  .constellation-stage {
    min-height: 275px;
  }

  .project-node {
    width: clamp(120px, 62vw, 160px);
  }
}

@media (forced-colors: active) {
  .project-node:focus-visible,
  .theme-toggle:focus-visible,
  .action-link:focus-visible,
  .constellation-stage:focus-visible {
    outline: 2px solid ButtonText;
    outline-offset: 2px;
    box-shadow: none;
  }

  .status-badge {
    border-color: ButtonText;
  }
}

@media (prefers-reduced-motion: reduce) {
  .project-orbit,
  .project-node,
  .project-detail,
  .constellation-link,
  .skip-link {
    transition: none;
  }
}