:root {
  --bg-0: #061018;
  --bg-1: #0f1f2b;
  --text: #eef7ff;
  --muted: #a5c4de;
  --panel-bg: rgba(8, 21, 33, 0.88);
  --panel-border: rgba(138, 191, 233, 0.35);
  --accent: #8fd4ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text);
  background: #000000;
  overflow: hidden;
}

#app {
  height: 100%;
  overflow: hidden;
}

#viewer-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#scene {
  width: 100%;
  height: 100%;
  display: block;
}

.overlay-card {
  position: absolute;
  max-width: min(370px, 92vw);
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(6px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

#empty-state {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#control-column {
  position: absolute;
  top: 0;
  right: 0;
  width: min(86vw, 360px);
  height: 100%;
  padding: 14px 12px 70px;
  background: rgba(7, 18, 28, 0.92);
  border-left: 1px solid rgba(138, 191, 233, 0.3);
  transform: translateX(110%);
  transition: transform 180ms ease;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  z-index: 6;
}

#control-column.menu-open {
  transform: translateX(0);
  pointer-events: auto;
}

#search-panel {
  position: relative;
  width: 100%;
}

#search-panel h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

#search-panel .search-row {
  display: flex;
  gap: 8px;
}

#search-panel input {
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(143, 212, 255, 0.45);
  border-radius: 7px;
  background: rgba(8, 25, 38, 0.92);
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-size: 0.86rem;
}

#search-panel button {
  border: 1px solid rgba(143, 212, 255, 0.75);
  background: rgba(9, 37, 56, 0.86);
  color: var(--text);
  border-radius: 7px;
  padding: 6px 10px;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
}

#search-panel button:disabled,
#search-panel input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#search-panel .search-status {
  min-height: 1.05rem;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

#settings-panel {
  position: relative;
  width: 100%;
}

#settings-panel h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

#settings-panel label {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 6px;
}

#settings-panel .settings-row {
  display: flex;
  gap: 8px;
}

#settings-panel .settings-row + .settings-row {
  margin-top: 8px;
}

#settings-panel select {
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(143, 212, 255, 0.45);
  border-radius: 7px;
  background: rgba(8, 25, 38, 0.92);
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-size: 0.86rem;
}

#settings-panel button {
  border: 1px solid rgba(143, 212, 255, 0.75);
  background: rgba(9, 37, 56, 0.86);
  color: var(--text);
  border-radius: 7px;
  padding: 6px 10px;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
}

#settings-panel button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#settings-panel .sound-toggle-btn {
  flex: 1;
}

#info-popup {
  position: absolute;
  left: 16px;
  top: 16px;
  width: min(380px, calc(100vw - 32px));
  max-height: min(72vh, 620px);
  overflow: auto;
  pointer-events: auto;
  z-index: 4;
}

#info-popup.hidden,
#empty-state.hidden,
#mobile-menu-backdrop.hidden,
#help-backdrop.hidden,
#help-modal.hidden {
  display: none;
}

#mobile-menu-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 10, 15, 0.45);
  z-index: 5;
}

#help-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 10, 15, 0.62);
  z-index: 7;
}

#help-modal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(860px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  overflow: auto;
  border: 1px solid rgba(138, 191, 233, 0.35);
  border-radius: 12px;
  background: rgba(8, 21, 33, 0.96);
  color: var(--text);
  padding: 14px 14px 16px;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.45);
  z-index: 8;
}

#help-modal .help-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

#help-modal h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.35;
}

#help-modal h3 {
  margin: 12px 0 6px;
  font-size: 0.95rem;
}

#help-modal p,
#help-modal li {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

#help-modal ul,
#help-modal ol {
  margin: 6px 0 10px 20px;
  padding: 0;
}

#help-modal pre {
  margin: 6px 0 10px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid rgba(138, 191, 233, 0.25);
  background: rgba(7, 18, 28, 0.9);
  color: #d1e5f7;
  overflow: auto;
  font-size: 0.82rem;
}

#help-close-btn {
  border: 1px solid rgba(143, 212, 255, 0.75);
  background: rgba(9, 37, 56, 0.86);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 10px;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

.fab-btn {
  position: absolute;
  bottom: 16px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(190, 224, 248, 0.42);
  border-radius: 999px;
  background: rgba(9, 27, 41, 0.58);
  color: #ecf7ff;
  font: inherit;
  font-size: 1.1rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(6px);
  z-index: 6;
}

#help-fab {
  left: 16px;
}

#menu-fab {
  right: 16px;
}

#info-popup h2 {
  margin: 0 0 6px;
  font-size: 1rem;
}

#info-popup .popup-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
}

#info-popup .popup-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

#info-popup .popup-close-btn {
  border: 1px solid rgba(255, 120, 120, 0.7);
  background: rgba(54, 13, 16, 0.86);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

#info-popup .popup-close-btn:hover {
  border-color: rgba(255, 120, 120, 0.95);
}

#info-popup .popup-focus-btn {
  border: 1px solid rgba(143, 212, 255, 0.75);
  background: rgba(9, 37, 56, 0.86);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

#info-popup .popup-focus-btn:hover {
  border-color: rgba(143, 212, 255, 0.95);
}

#info-popup .popup-lines-btn {
  border: 1px solid rgba(255, 214, 124, 0.72);
  background: rgba(58, 43, 10, 0.86);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

#info-popup .popup-lines-btn:hover {
  border-color: rgba(255, 214, 124, 0.95);
}

#info-popup p {
  margin: 4px 0;
  color: var(--muted);
  font-size: 0.88rem;
}

#info-popup .prime-list {
  margin-top: 8px;
  max-height: 130px;
  overflow: auto;
  padding-right: 6px;
}

#info-popup .prime-item {
  margin: 2px 0;
  font-size: 0.9rem;
}

#info-popup .prime-item-btn {
  width: 100%;
  text-align: left;
  margin: 3px 0;
  border: 1px solid rgba(143, 212, 255, 0.26);
  border-radius: 6px;
  background: rgba(6, 20, 31, 0.7);
  color: var(--text);
  padding: 4px 6px;
  font: inherit;
  cursor: pointer;
}

#info-popup .prime-item-btn:hover {
  border-color: rgba(143, 212, 255, 0.6);
}

#info-popup .prime-item-btn.active {
  border-color: rgba(255, 120, 120, 0.8);
  background: rgba(54, 13, 16, 0.8);
}

@media (max-width: 720px) {
  #info-popup {
    width: calc(100vw - 32px);
    max-width: calc(100vw - 32px);
  }
}