:root {
  color-scheme: dark;
  --bg: #080a13;
  --bg-deep: #05060b;
  --surface: rgba(20, 24, 40, 0.86);
  --surface-solid: #141828;
  --surface-raised: #1b2033;
  --border: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.2);
  --text: #f6f7fb;
  --muted: rgba(246, 247, 251, 0.62);
  --accent: #86a8ff;
  --accent-strong: #a18cff;
  --danger: #ef746c;
  --success: #72bc8f;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius: 12px;
  --topbar-height: 68px;
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  overflow: hidden;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.is-hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 12%, rgba(94, 124, 220, 0.14), transparent 30%),
    radial-gradient(circle at 82% 88%, rgba(133, 83, 181, 0.12), transparent 32%),
    var(--bg);
}

.topbar {
  position: fixed;
  z-index: 30;
  inset: 0 0 auto 0;
  height: var(--topbar-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(8, 10, 19, 0.72);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  padding: 0;
  border: 0;
  background: none;
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0.18em;
  cursor: pointer;
}

.brand-mark {
  width: 24px;
  height: 24px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent);
}

.topbar-center,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-actions {
  justify-content: flex-end;
}

.universe-title {
  margin: 0;
  font-weight: 650;
}

.status-badge {
  padding: 5px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.status-badge.is-live {
  color: var(--success);
  border-color: rgba(114, 188, 143, 0.32);
  background: rgba(114, 188, 143, 0.08);
}

.text-button,
.icon-button {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.text-button {
  color: var(--muted);
}

.icon-button {
  display: grid;
  place-items: center;
  font-size: 24px;
  border-radius: 10px;
}

.icon-button:hover {
  background: rgba(255, 255, 255, 0.06);
}

#main {
  min-height: 100vh;
}

.center-view,
.home-view {
  min-height: 100vh;
  padding: calc(var(--topbar-height) + 48px) 32px 48px;
}

.center-view {
  display: grid;
  place-items: center;
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
}

.auth-card {
  width: min(460px, 100%);
  padding: 40px;
  border-radius: 20px;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 12px;
  font-size: 24px;
  letter-spacing: -0.025em;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.eyebrow,
.tiny-label {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.muted {
  color: var(--muted);
  line-height: 1.55;
}

.small {
  font-size: 14px;
}

.stack-form,
.app-dialog form {
  display: grid;
  gap: 16px;
}

label,
fieldset {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

legend {
  padding: 0 6px;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.055);
}

textarea {
  resize: vertical;
}

/* Windows/Chrome rendert Dropdown-Listen nativ: Optionen brauchen eigene Farben. */
select {
  color-scheme: dark;
  background-color: #1b2033;
}

select option,
select optgroup {
  color: #f6f7fb;
  background-color: #141828;
}

select option:checked {
  color: #ffffff;
  background-color: #34406a;
}

.member-grid {
  max-height: 240px;
  margin-top: 8px;
  overflow-y: auto;
  padding-right: 2px;
}

.check-option small {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
}

.pair-item {
  cursor: pointer;
}

input[type="color"] {
  padding: 5px;
}

input[type="checkbox"] {
  width: 18px;
  min-height: 18px;
}

.primary-button,
.secondary-button,
.danger-button {
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 9px;
  font-weight: 700;
  cursor: pointer;
}

.primary-button {
  border: 1px solid transparent;
  background: linear-gradient(135deg, #769cff, #9b82ef);
  color: #090b14;
}

.secondary-button {
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.045);
}

.danger-button {
  border: 1px solid rgba(239, 116, 108, 0.3);
  background: rgba(239, 116, 108, 0.08);
  color: #ffaaa4;
}

.primary-button:hover,
.secondary-button:hover,
.danger-button:hover {
  filter: brightness(1.08);
}

.form-message {
  min-height: 20px;
  margin: 0;
  color: #ffaaa4;
  font-size: 14px;
}

.home-view {
  width: min(1120px, 100%);
  margin: 0 auto;
  overflow-y: auto;
}

.home-intro {
  max-width: 720px;
  margin-bottom: 48px;
}

.home-intro .muted {
  max-width: 580px;
}

.universe-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.universe-card,
.new-universe-card {
  min-height: 200px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background:
    radial-gradient(circle at 80% 20%, rgba(134, 168, 255, 0.18), transparent 35%),
    var(--surface);
  text-align: left;
}

.universe-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  overflow: hidden;
}

.universe-card::after {
  content: "";
  position: absolute;
  width: 130px;
  height: 130px;
  right: -42px;
  bottom: -48px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.universe-card:hover,
.new-universe-card:hover {
  border-color: rgba(134, 168, 255, 0.5);
  transform: translateY(-2px);
}

.universe-card-actions {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 8px;
}

.mini-button {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  cursor: pointer;
}

.new-universe-card {
  width: 100%;
  min-height: 96px;
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.025);
}

.new-universe-card small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.plus-symbol {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 24px;
}

.map-view {
  position: fixed;
  inset: var(--topbar-height) 0 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 50%, rgba(27, 34, 63, 0.55), transparent 58%),
    var(--bg-deep);
}

#starCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
}

#starCanvas:active {
  cursor: grabbing;
}

.map-gradient {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 35%, rgba(3, 4, 9, 0.62) 100%);
}

.map-controls {
  position: absolute;
  left: 20px;
  bottom: 20px;
  display: flex;
  gap: 8px;
}

.physics-status {
  position: absolute;
  left: 20px;
  bottom: 76px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid rgba(134, 168, 255, 0.24);
  border-radius: 9px;
  background: rgba(12, 15, 27, 0.82);
  color: var(--muted);
  font-size: 12px;
  backdrop-filter: blur(12px);
}

.physics-status span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: physics-pulse 900ms ease-in-out infinite alternate;
}

@keyframes physics-pulse {
  to {
    opacity: 0.35;
    transform: scale(0.72);
  }
}

.control-button {
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(12, 15, 27, 0.82);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.control-button.wide {
  padding: 0 14px;
}

.floating-button {
  position: absolute;
  right: 22px;
  top: 22px;
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(12, 15, 27, 0.84);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.menu-glyph {
  width: 16px;
  display: grid;
  gap: 3px;
}

.menu-glyph i {
  display: block;
  height: 1px;
  background: currentColor;
}

.sidebar {
  position: absolute;
  z-index: 10;
  inset: 0 0 0 auto;
  width: min(390px, 94vw);
  display: grid;
  grid-template-rows: auto auto auto 1fr auto;
  padding: 22px;
  border-left: 1px solid var(--border);
  background: rgba(13, 16, 28, 0.94);
  box-shadow: -24px 0 80px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(24px);
  transform: translateX(102%);
  transition: transform 220ms ease;
}

.sidebar.is-open {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin: 12px 0 14px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.tab {
  min-height: 38px;
  padding: 5px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}

.tab.is-active {
  color: var(--text);
  background: var(--surface-raised);
}

.sidebar-list {
  min-height: 0;
  padding: 14px 2px;
  overflow-y: auto;
}

.sidebar-tools {
  display: grid;
  grid-template-columns: 1fr 132px;
  gap: 8px;
}

.sidebar-tools select {
  font-size: 13px;
}

.list-group-title {
  margin: 18px 8px 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.field-hint {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.direct-moons-list {
  display: grid;
  gap: 8px;
}

.direct-moon-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) 44px 40px;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.025);
}

.direct-moon-row input,
.direct-moon-row select {
  min-width: 0;
}

.direct-moon-row .remove-moon {
  min-width: 40px;
  min-height: 40px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
}

.sidebar-item {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 8px;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.sidebar-item:hover {
  background: rgba(255, 255, 255, 0.035);
}

.item-orb {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  box-shadow: inset -8px -8px 14px rgba(0, 0, 0, 0.35);
}

.item-orb.is-moon {
  width: 24px;
  height: 24px;
}

.item-copy strong,
.item-copy small {
  display: block;
}

.item-copy small {
  margin-top: 3px;
  color: var(--muted);
}

.item-chevron {
  color: var(--muted);
}

.sidebar-footer {
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.sidebar-footer .primary-button {
  width: 100%;
}

.empty-universe {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 24px;
  text-align: center;
}

.empty-universe p {
  max-width: 420px;
  color: var(--muted);
}

.empty-orbit {
  width: 110px;
  height: 110px;
  margin-bottom: 24px;
  border: 1px solid rgba(134, 168, 255, 0.35);
  border-radius: 50%;
  position: relative;
}

.empty-orbit::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  top: 10px;
  left: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 24px var(--accent);
}

.planet-popover {
  position: absolute;
  z-index: 8;
  width: min(310px, calc(100vw - 32px));
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(16, 19, 32, 0.95);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.popover-close {
  position: absolute;
  right: 8px;
  top: 8px;
  width: 36px;
  height: 36px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0;
}

.meta-chip {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.app-dialog {
  width: min(520px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  padding: 0;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--surface-solid);
  box-shadow: var(--shadow);
}

.app-dialog::backdrop {
  background: rgba(2, 3, 8, 0.72);
  backdrop-filter: blur(5px);
}

.app-dialog form {
  max-height: calc(100vh - 34px);
  padding: 24px;
  overflow-y: auto;
}

.large-dialog {
  width: min(720px, calc(100vw - 32px));
}

.dialog-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding-top: 8px;
}

.split-actions {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.physics-dialog {
  width: min(780px, calc(100vw - 32px));
}

.physics-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.range-control {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
}

.range-control > span {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--text);
}

.range-control output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.range-control small {
  color: var(--muted);
  line-height: 1.4;
}

.range-control input {
  min-height: 28px;
  padding: 0;
  accent-color: var(--accent);
}

.full-width {
  grid-column: 1 / -1;
}

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

.check-option {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.toast-region {
  position: fixed;
  z-index: 100;
  right: 20px;
  bottom: 20px;
  display: grid;
  gap: 8px;
}

.toast {
  max-width: 360px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-raised);
  box-shadow: var(--shadow);
}

@media (max-width: 780px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
    padding: 0 14px;
  }

  .brand span:last-child {
    display: none;
  }

  .status-badge {
    display: none;
  }

  .center-view,
  .home-view {
    padding: calc(var(--topbar-height) + 32px) 18px 32px;
  }

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

  .universe-card {
    min-height: 170px;
  }

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

  .full-width {
    grid-column: auto;
  }

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

  .sidebar-tools {
    grid-template-columns: 1fr;
  }

  .direct-moon-row {
    grid-template-columns: 1fr 1fr 44px;
  }

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

  .direct-moon-row .moon-name {
    grid-column: 1 / -1;
  }

  .map-controls {
    left: 12px;
    bottom: 12px;
    max-width: calc(100vw - 24px);
    flex-wrap: wrap;
  }

  .physics-status {
    left: 12px;
    bottom: 112px;
  }

  .floating-button {
    right: 12px;
    top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}