/* =========================================================
   Lunera Games — celestial studio site
   Palette: void black · royal purple · luminous gold
   ========================================================= */

:root {
  --void: #050308;
  --black: #000000;
  --purple-deep: #2e1a47;
  --purple: #4b2c7f;
  --purple-mid: #6b3fa0;
  --lavender: #c9b8e8;
  --gold: #ffd700;
  --gold-soft: #fad089;
  --gold-dim: #c9a227;
  --mist: #e8e0f5;
  --text: #ebe4f7;
  --muted: #9a8bb8;

  --font-display: "Cinzel", Georgia, serif;
  --font-body: "Outfit", system-ui, sans-serif;

  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --glow-gold: 0 0 28px rgba(255, 215, 0, 0.35);
  --glow-purple: 0 0 40px rgba(75, 44, 127, 0.55);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--text);
  background: var(--void);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ---------- Atmosphere ---------- */

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.nebula {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
  mix-blend-mode: screen;
}

.nebula--a {
  width: min(55vw, 520px);
  height: min(55vw, 520px);
  background: radial-gradient(circle, rgba(75, 44, 127, 0.7), transparent 70%);
  top: -10%;
  right: -8%;
  animation: drift 22s ease-in-out infinite alternate;
}

.nebula--b {
  width: min(45vw, 420px);
  height: min(45vw, 420px);
  background: radial-gradient(circle, rgba(250, 208, 137, 0.22), transparent 70%);
  bottom: 10%;
  left: -6%;
  animation: drift 28s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-40px, 30px) scale(1.12); }
}

.cursor-glow {
  position: fixed;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.12), rgba(75, 44, 127, 0.08) 40%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s;
}

body:hover .cursor-glow {
  opacity: 1;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 2;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  background: linear-gradient(to bottom, rgba(5, 3, 8, 0.92), rgba(5, 3, 8, 0));
  backdrop-filter: blur(0);
  transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
  z-index: 50;
}

.site-header.is-scrolled {
  background: rgba(5, 3, 8, 0.85);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(75, 44, 127, 0.35);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.28em;
  font-size: 0.85rem;
}

.brand-mark__logo {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.35));
}

.nav {
  display: flex;
  gap: clamp(0.75rem, 2vw, 1.75rem);
}

.nav a {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.25s;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), var(--purple-mid));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--gold-soft);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 2.25rem;
  height: 2.25rem;
  flex-direction: column;
  justify-content: center;
  gap: 0.4rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  background: var(--gold-soft);
  transition: transform 0.3s;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.6rem;
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 500;
  transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s, color 0.3s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--gold {
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-dim) 45%, var(--purple) 160%);
  color: #1a0f28;
  box-shadow: var(--glow-gold);
}

.btn--gold:hover {
  box-shadow: 0 0 40px rgba(255, 215, 0, 0.5);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(201, 184, 232, 0.35);
  color: var(--lavender);
}

.btn--ghost:hover {
  border-color: var(--gold-soft);
  color: var(--gold-soft);
  box-shadow: var(--glow-purple);
}

/* ---------- Hero ---------- */

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

.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-h) + 0.5rem) 1.5rem 5rem;
  position: relative;
  text-align: center;
  gap: 1.5rem;
}

.hero__visual {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  pointer-events: none;
  width: 100%;
}

.hero__logo {
  width: min(92vw, 620px);
  height: auto;
  opacity: 0.98;
  animation: logoFloat 8s ease-in-out infinite;
  filter: drop-shadow(0 0 40px rgba(75, 44, 127, 0.45));
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-12px) scale(1.015); }
}

.hero__copy {
  position: relative;
  z-index: 2;
  margin-top: -1.5rem;
  animation: fadeUp 1.2s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
}

.scroll-hint {
  position: absolute;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  width: 1.4rem;
  height: 2.2rem;
  border: 1px solid rgba(201, 184, 232, 0.4);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 0.4rem;
}

.scroll-hint span {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--gold);
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(4.5rem, 12vw, 8rem) clamp(1.25rem, 4vw, 3rem);
}

.section__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: 640px;
}

.section__label {
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 1rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.04em;
  margin-bottom: 1.25rem;
  background: linear-gradient(120deg, var(--mist), var(--gold-soft) 60%, var(--lavender));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section__lead {
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2.75rem;
}

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Studio ---------- */

.studio__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  border-top: 1px solid rgba(75, 44, 127, 0.45);
  padding-top: 2.5rem;
}

.studio__item h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--gold-soft);
  margin-bottom: 0.75rem;
}

.studio__item p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Worlds ---------- */

.world-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.world-cards--single {
  grid-template-columns: 1fr;
  max-width: 420px;
  margin-inline: auto;
}

.world-card {
  padding: 1.75rem 1.5rem;
  border: 1px solid rgba(75, 44, 127, 0.5);
  background:
    linear-gradient(160deg, rgba(46, 26, 71, 0.45), rgba(5, 3, 8, 0.2)),
    radial-gradient(circle at 80% 0%, rgba(255, 215, 0, 0.08), transparent 50%);
  transition: transform 0.45s var(--ease), border-color 0.35s, box-shadow 0.45s;
  transform-style: preserve-3d;
}

.world-card:hover {
  border-color: rgba(250, 208, 137, 0.45);
  box-shadow: var(--glow-purple);
}

.world-card--featured {
  border-color: rgba(255, 215, 0, 0.35);
  background:
    linear-gradient(160deg, rgba(75, 44, 127, 0.55), rgba(5, 3, 8, 0.35)),
    radial-gradient(circle at 20% 100%, rgba(255, 215, 0, 0.15), transparent 55%);
}

.world-card__phase {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--lavender);
  margin-bottom: 1rem;
}

.world-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  color: var(--mist);
}

.world-card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

.world-card__status {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- Orbit ---------- */

.exotic {
  position: relative;
}

#orbitCanvas {
  width: 100%;
  max-width: 900px;
  height: auto;
  display: block;
  margin: 0 auto;
  background:
    radial-gradient(ellipse at center, rgba(46, 26, 71, 0.55), rgba(0, 0, 0, 0.85)),
    #000;
  border: 1px solid rgba(75, 44, 127, 0.55);
  touch-action: none;
  cursor: grab;
}

.orbit-wrap {
  display: grid;
  gap: 1.25rem;
}

#orbitCanvas.is-dragging {
  cursor: grabbing;
}

.orbit__hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem 1.5rem;
}

.orbit__hud label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.orbit__hud input[type="range"] {
  width: 140px;
  accent-color: var(--gold);
}

/* ---------- Signal form ---------- */

.signal-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

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

.field label {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lavender);
}

.field input,
.field textarea {
  background: rgba(46, 26, 71, 0.25);
  border: 1px solid rgba(75, 44, 127, 0.55);
  padding: 0.9rem 1rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  border-color: rgba(250, 208, 137, 0.55);
  box-shadow: 0 0 0 3px rgba(75, 44, 127, 0.35);
}

.signal-form .btn {
  grid-column: 1 / -1;
  justify-self: start;
}

.form-note {
  grid-column: 1 / -1;
  min-height: 1.5rem;
  color: var(--gold-soft);
  font-size: 0.9rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid rgba(75, 44, 127, 0.4);
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer__logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  filter: drop-shadow(0 0 12px rgba(75, 44, 127, 0.55));
}

.footer__brand strong {
  font-family: var(--font-display);
  letter-spacing: 0.2em;
  font-size: 0.85rem;
  display: block;
}

.footer__brand p {
  color: var(--lavender);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.footer__copy {
  color: var(--muted);
  font-size: 0.8rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .studio__grid,
  .world-cards {
    grid-template-columns: 1fr;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    background: rgba(5, 3, 8, 0.96);
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid rgba(75, 44, 127, 0.45);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s var(--ease), opacity 0.4s;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .hero__logo {
    width: min(96vw, 520px);
  }

  .hero__copy {
    margin-top: -0.5rem;
  }
}

@media (max-width: 600px) {
  .signal-form {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}