* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#scene {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#hud {
  position: fixed;
  top: 0;
  left: 0;
  padding: 32px 120px 60px 40px;
  color: #ffffff;
  pointer-events: none;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  z-index: 5;
  /* scrim so text stays legible over any planet, bright or dark */
  background: linear-gradient(
    135deg,
    rgba(0, 0, 0, 0.55) 0%,
    rgba(0, 0, 0, 0.28) 45%,
    rgba(0, 0, 0, 0) 75%
  );
}

#planet-name {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#planet-subtitle {
  margin-top: 2px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #9fb0e0;
}

#planet-subtitle:empty {
  display: none;
}

#planet-facts {
  margin-top: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: #e7ecff;
  max-width: 620px; /* wide enough that each "\n"-separated sentence fits on one line */
  line-height: 1.55;
  white-space: pre-line; /* honor "\n" in a body's facts */
}

#planet-facts:empty {
  display: none;
}

#nav-help {
  margin: 12px 0 0;
  padding: 0 0 0 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: #e7ecff;
  max-width: 360px;
  line-height: 1.5;
}

#nav-help li {
  margin-bottom: 6px;
}

#nav-help strong {
  color: #ffffff;
  font-weight: 700;
}

#cv-link {
  display: none;
  margin-top: 14px;
  pointer-events: auto;
  color: #0a0a10;
  background: #ffffff;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 999px;
  width: fit-content;
}

#cv-link:hover {
  background: #cfe0ff;
}

#cv-link.visible {
  display: inline-block;
}

#menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 260px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 36px;
  z-index: 10;
  /* scrim so menu text stays legible over any planet, bright or dark */
  background: linear-gradient(
    to left,
    rgba(0, 0, 0, 0.55) 0%,
    rgba(0, 0, 0, 0.3) 55%,
    rgba(0, 0, 0, 0) 100%
  );
  pointer-events: none;
}

#planet-list {
  pointer-events: auto;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: right;
}

#planet-list li {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 8px 4px;
  cursor: pointer;
  opacity: 0.72;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  transition: opacity 0.25s ease, transform 0.25s ease, color 0.25s ease;
  position: relative;
}

#planet-list li:hover {
  opacity: 1;
  transform: translateX(-4px);
}

.overview-item {
  font-size: 0.85rem !important;
  font-weight: 500 !important;
  text-transform: uppercase;
  letter-spacing: 0.08em !important;
  color: #b7c0e0 !important;
  margin-bottom: 10px;
  padding-bottom: 14px !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.overview-item.active {
  color: #ffffff !important;
}

#planet-list li.active {
  opacity: 1;
  font-weight: 700;
  transform: translateX(-10px);
}

#planet-list li.active::after {
  content: "";
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.8);
}

.dwarf-header {
  font-size: 0.68rem !important;
  font-weight: 500 !important;
  text-transform: uppercase;
  letter-spacing: 0.1em !important;
  color: rgba(255, 255, 255, 0.35) !important;
  opacity: 1 !important;
  cursor: default !important;
  padding-top: 10px !important;
  padding-bottom: 0 !important;
}

.dwarf-header:hover {
  transform: none !important;
}

.dwarf-item {
  font-size: 0.88rem !important;
  opacity: 0.6;
}

.moon-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
}

#planet-list li.expanded > .moon-list {
  max-height: 240px;
}

.moon-item {
  font-size: 0.78rem !important;
  font-weight: 500 !important;
  opacity: 0.55;
  padding: 5px 4px !important;
}

.moon-item:hover {
  opacity: 0.9 !important;
}

.moon-item.active {
  opacity: 1 !important;
}

.planet-label {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  pointer-events: none;
  white-space: nowrap;
}

#controls {
  position: fixed;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  display: flex;
  align-items: stretch;
  gap: 22px;
  padding: 8px 20px 10px;
  border-radius: 16px;
  background: rgba(10, 10, 16, 0.55);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: bottom 0.2s ease;
}

/* when the credits are expanded, lift the controls above them
   (--credit-h is kept in sync by the script in index.html) */
body.credits-open #controls {
  bottom: calc(14px + var(--credit-h, 0px) + 10px);
}

/* each control: its name on top, the switch or slider under it */
.control {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  cursor: pointer;
}

.control-label {
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  opacity: 0.85;
  white-space: nowrap;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

#mute-btn {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.85;
  filter: grayscale(1) brightness(1.6);
}

#mute-btn:hover {
  opacity: 1;
}

#mute-btn:focus-visible {
  outline: 2px solid #8fb5ff;
  outline-offset: 2px;
}

.control-slider {
  width: 90px;
  accent-color: #8fb5ff;
  cursor: pointer;
}

/* checkbox drawn as an on/off sliding switch */
.switch {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  width: 34px;
  height: 18px;
  margin: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: background 0.2s ease;
}

.switch::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform 0.2s ease;
}

.switch:checked {
  background: #8fb5ff;
}

.switch:checked::before {
  transform: translateX(16px);
}

.switch:focus-visible,
.control-slider:focus-visible {
  outline: 2px solid #8fb5ff;
  outline-offset: 2px;
}

#cv-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
}

#cv-modal[hidden] {
  display: none;
}

#cv-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(4px);
}

#cv-modal-panel {
  position: relative;
  width: min(900px, 94vw);
  height: min(1100px, 90vh);
  background: #17171c;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#cv-modal-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  padding: 10px 14px;
  background: #0e0e12;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

#cv-modal-download {
  color: #8fb5ff;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.02em;
}

#cv-modal-download:hover {
  text-decoration: underline;
}

#cv-modal-close {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: #ffffff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.85rem;
  line-height: 1;
}

#cv-modal-close:hover {
  background: rgba(255, 255, 255, 0.18);
}

#cv-modal-frame {
  flex: 1;
  border: none;
  background: #ffffff;
}

@media (max-width: 700px) {
  #cv-modal-panel {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
}

#credit {
  position: fixed;
  bottom: 14px;
  left: 40px;
  right: 40px;
  z-index: 5;
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  pointer-events: none;
}

#credit a {
  color: rgba(255, 255, 255, 0.5);
  pointer-events: auto;
}

#credit-toggle {
  pointer-events: auto;
  background: none;
  border: none;
  padding: 0 6px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.7rem;
  line-height: 1;
  cursor: pointer;
  display: inline-block;
  transform: rotate(180deg);
  transition: transform 0.2s ease, color 0.2s ease;
}

#credit-toggle:hover {
  color: rgba(255, 255, 255, 0.9);
}

#credit.collapsed #credit-toggle {
  transform: rotate(0deg);
}

#credit.collapsed #credit-text {
  display: none;
}

@media (max-width: 700px) {
  #credit {
    left: 20px;
    right: 20px;
    font-size: 0.6rem;
  }
  #hud {
    padding: 20px 60px 40px 20px;
  }
  #planet-name {
    font-size: 1.7rem;
  }
  #planet-facts,
  #nav-help {
    max-width: 220px;
  }
  #menu {
    width: 190px;
    padding-right: 16px;
  }
  #planet-list li {
    font-size: 0.8rem;
  }
  #controls {
    gap: 8px;
    padding: 6px 12px;
    max-width: calc(100vw - 40px);
    flex-wrap: wrap;
    justify-content: center;
  }
  .control-label {
    font-size: 0.62rem;
  }
  .control-slider {
    width: 60px;
  }
}

/* hidden YouTube player for the background music (see js/music.js) */
#music-player {
  position: fixed;
  left: -9999px;
  top: 0;
  width: 200px;
  height: 200px;
  opacity: 0;
  pointer-events: none;
}

/* ---------- welcome screen ---------- */

#welcome {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(ellipse at center, rgba(8, 10, 22, 0.72) 0%, rgba(0, 0, 0, 0.92) 100%);
  backdrop-filter: blur(3px);
  transition: opacity 0.4s ease;
}

#welcome[hidden] {
  display: none;
}

#welcome.closing {
  opacity: 0;
  pointer-events: none;
}

#welcome-panel {
  max-width: 520px;
  width: 100%;
  max-height: 100%;
  overflow-y: auto;
  color: #e7ecff;
  text-align: center;
}

#welcome-title {
  color: #ffffff;
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#welcome-role {
  margin-top: 4px;
  color: #9fb0e0;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#welcome-intro {
  margin-top: 22px;
  font-size: 0.98rem;
  line-height: 1.6;
}

#welcome-steps {
  margin: 20px auto 0;
  padding: 16px 20px 16px 36px;
  max-width: 440px;
  text-align: left;
  font-size: 0.75rem;
  line-height: 1.5;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

#welcome-steps li + li {
  margin-top: 6px;
}

#welcome-steps strong {
  color: #ffffff;
}

#welcome-enter {
  margin-top: 26px;
  padding: 12px 34px;
  border: none;
  border-radius: 999px;
  background: #ffffff;
  color: #0a0a10;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

#welcome-enter:hover {
  background: #cfe0ff;
  transform: translateY(-1px);
}

#welcome-enter:focus-visible {
  outline: 2px solid #8fb5ff;
  outline-offset: 3px;
}

#welcome-note {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.75rem;
}

@media (max-width: 700px) {
  #welcome-title {
    font-size: 1.7rem;
  }
  #welcome-intro {
    font-size: 0.88rem;
  }
  #welcome-steps {
    font-size: 0.8rem;
    padding: 12px 14px 12px 28px;
  }
}