:root {
  color-scheme: dark;
  --paper: 245 240 231;
  --ink: 5 5 5;
  --ember: 255 77 46;
  --ember-soft: 255 122 64;
  --mark-width: min(72vw, 860px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --long: 2200ms;
  --longer: 3600ms;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: rgb(var(--ink));
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow: hidden;
  background: rgb(var(--ink));
  color: rgb(var(--paper));
  font-family:
    "Helvetica Neue",
    Helvetica,
    Arial,
    sans-serif;
  letter-spacing: 0.01em;
}

button,
a {
  font: inherit;
}

button {
  border: 0;
}

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

/* ---------- cosmic background ---------- */

.cosmos {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  background: rgb(var(--ink));
}

.cosmos-layer {
  position: absolute;
  inset: -10%;
  background-position: center;
  background-size: cover;
  filter: brightness(1.05) saturate(1.16) contrast(1.06);
  transform: scale(1.06);
  will-change: transform, opacity;
}

.cosmos-a {
  background-image: url("./assets/space-landscape.png");
  animation:
    cosmos-drift-a 88s ease-in-out infinite alternate,
    cosmos-fade 52s ease-in-out infinite;
}

.cosmos-b {
  background-image: url("./assets/space-portrait.png");
  opacity: 0;
  animation:
    cosmos-drift-b 104s ease-in-out infinite alternate,
    cosmos-fade 52s ease-in-out infinite;
  animation-delay: -26s, -26s;
}

/* drifting orange nebula light, almost imperceptible */
.cosmos-drift {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(38% 38% at 32% 30%, rgba(var(--ember), 0.16), transparent 60%),
    radial-gradient(46% 46% at 72% 74%, rgba(var(--ember-soft), 0.1), transparent 62%);
  mix-blend-mode: screen;
  opacity: 0.85;
  will-change: transform;
  animation: nebula-roam 46s ease-in-out infinite alternate;
}

/* orange + black grade for brand temperature (kept light so stars read) */
.cosmos-tint {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 86% at 50% 16%, rgba(var(--ember), 0.2), transparent 54%),
    radial-gradient(110% 80% at 50% 118%, rgba(var(--ember-soft), 0.14), transparent 58%),
    linear-gradient(180deg, rgba(5, 5, 5, 0.28) 0%, rgba(5, 5, 5, 0.16) 46%, rgba(5, 5, 5, 0.48) 100%);
}

.cosmos-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 46%, transparent 44%, rgba(0, 0, 0, 0.34) 78%, rgba(0, 0, 0, 0.58) 100%);
}

/* ---------- scene ---------- */

.presence {
  position: relative;
  display: grid;
  min-height: 100vh;
  isolation: isolate;
  animation: page-breath 12s var(--ease) infinite;
}

.scene {
  position: relative;
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: clamp(1.5rem, 4vw, 4rem);
}

/* center scrim that fades in only with the destinations, for legibility */
.scene::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(64% 56% at 50% 50%, rgba(0, 0, 0, 0.62), transparent 72%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 1000ms var(--ease);
}

.scene.is-open::before {
  opacity: 1;
}

.kicker {
  position: fixed;
  top: clamp(1.25rem, 3vw, 2.5rem);
  left: 50%;
  margin: 0;
  color: rgba(var(--paper), 0.5);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.46em;
  line-height: 1;
  text-transform: uppercase;
  text-shadow: 0 0 1.5rem rgba(0, 0, 0, 0.6);
  transform: translateX(-50%);
  opacity: 0;
  transition:
    opacity var(--long) var(--ease),
    filter var(--long) var(--ease);
}

.mark-button {
  position: relative;
  display: grid;
  width: var(--mark-width);
  max-height: 52vh;
  padding: 0;
  place-items: center;
  background: transparent;
  cursor: pointer;
  opacity: 0;
  transform: translateY(-1.2vh);
  transition:
    opacity var(--longer) var(--ease),
    filter var(--long) var(--ease),
    transform var(--longer) var(--ease);
}

.mark-button::before {
  position: absolute;
  inset: 6% 4%;
  z-index: -1;
  background: radial-gradient(circle, rgba(var(--ember), 0.22), transparent 60%);
  content: "";
  filter: blur(6rem);
  opacity: 0.7;
  pointer-events: none;
  animation: glow-breath 12s var(--ease) infinite;
}

.artist-mark {
  display: block;
  width: 100%;
  height: auto;
  max-height: 52vh;
  object-fit: contain;
  filter: drop-shadow(0 0 3.5rem rgba(var(--ember), 0.28));
  user-select: none;
  -webkit-user-drag: none;
}

.invitation {
  position: fixed;
  bottom: clamp(2.75rem, 8vh, 6rem);
  left: 50%;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(var(--paper), 0.5);
  cursor: pointer;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  line-height: 1;
  opacity: 0;
  transform: translateX(-50%);
  transition:
    color 1400ms var(--ease),
    text-shadow 1400ms var(--ease),
    opacity var(--long) var(--ease);
}

.invitation:hover,
.invitation:focus-visible {
  color: rgba(var(--ember-soft), 0.95);
  text-shadow: 0 0 1.4rem rgba(var(--ember), 0.7);
}

.mark-button:focus-visible,
.invitation:focus-visible,
.close:focus-visible,
.destinations a:focus-visible {
  outline: 1px solid rgba(var(--paper), 0.62);
  outline-offset: 0.5rem;
}

/* ---------- destinations (text only) ---------- */

.destinations {
  position: fixed;
  left: 50%;
  top: 50%;
  display: grid;
  width: min(74vw, 560px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3.4vw, 2.2rem) clamp(2rem, 8vw, 6.5rem);
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.destinations a {
  position: relative;
  color: rgba(var(--paper), 0);
  font-size: clamp(1.05rem, 1.9vw, 1.5rem);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.1;
  opacity: 0;
  text-align: center;
  transition:
    color 900ms var(--ease),
    letter-spacing 900ms var(--ease),
    text-shadow 900ms var(--ease),
    opacity 1200ms var(--ease);
}

.destinations a:hover,
.destinations a:focus-visible {
  color: rgb(var(--paper));
  letter-spacing: 0.14em;
  text-shadow: 0 0 1.6rem rgba(var(--ember), 0.55);
  opacity: 1;
}

.close {
  position: fixed;
  right: clamp(1.25rem, 3vw, 2.5rem);
  bottom: clamp(1.25rem, 3vw, 2.5rem);
  padding: 0;
  background: transparent;
  color: rgba(var(--paper), 0);
  cursor: pointer;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  text-transform: uppercase;
  transition:
    color 900ms var(--ease),
    opacity 900ms var(--ease);
}

.close:hover,
.close:focus-visible {
  color: rgba(var(--ember-soft), 0.95);
}

/* small randomizing wordmark inside the destinations view (also closes) */
.dest-mark {
  position: fixed;
  left: 50%;
  top: clamp(15%, 23vh, 27%);
  width: clamp(118px, 20vw, 184px);
  padding: 0.6rem;
  background: transparent;
  cursor: pointer;
  opacity: 0;
  transform: translateX(-50%);
  pointer-events: none;
  transition:
    opacity 900ms var(--ease),
    filter 700ms var(--ease),
    transform 700ms var(--ease);
}

.dest-mark img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 1.3rem rgba(var(--ember), 0.3));
  user-select: none;
  -webkit-user-drag: none;
}

.dest-mark:focus-visible {
  outline: 1px solid rgba(var(--paper), 0.62);
  outline-offset: 0.5rem;
}

.is-open .dest-mark {
  opacity: 0.5;
  pointer-events: auto;
  transition-delay: 1000ms;
}

.is-open .dest-mark:hover,
.is-open .dest-mark:focus-visible {
  opacity: 0.92;
  filter: brightness(1.06);
}

/* ---------- entrance choreography ---------- */

.loaded .kicker {
  opacity: 1;
  transition-delay: 3000ms;
}

.loaded .mark-button {
  opacity: 1;
  transform: translateY(-1.2vh);
  transition-delay: 900ms;
}

.loaded .invitation {
  opacity: 1;
  transition-delay: 5600ms;
}

.visited .kicker,
.visited .mark-button,
.visited .invitation {
  opacity: 1;
  transition-delay: 0ms;
}

.is-open .kicker,
.is-open .invitation {
  opacity: 0;
  pointer-events: none;
  transition-delay: 0ms;
}

.is-open .mark-button {
  filter: blur(7px);
  opacity: 0.12;
  pointer-events: none;
}

.is-open .destinations {
  pointer-events: auto;
}

.is-open .destinations a {
  color: rgba(var(--paper), 0.62);
  opacity: 0.82;
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.75);
}

.is-open .destinations a:nth-child(1) { transition-delay: 260ms; }
.is-open .destinations a:nth-child(2) { transition-delay: 330ms; }
.is-open .destinations a:nth-child(3) { transition-delay: 400ms; }
.is-open .destinations a:nth-child(4) { transition-delay: 470ms; }
.is-open .destinations a:nth-child(5) { transition-delay: 540ms; }
.is-open .destinations a:nth-child(6) { transition-delay: 610ms; }
.is-open .destinations a:nth-child(7) { transition-delay: 680ms; }
.is-open .destinations a:nth-child(8) { transition-delay: 750ms; }

.is-open .close {
  color: rgba(var(--paper), 0.4);
  opacity: 1;
  pointer-events: auto;
  transition-delay: 900ms;
}

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

/* ---------- keyframes ---------- */

@keyframes page-breath {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.02); }
}

@keyframes glow-breath {
  0%, 100% { opacity: 0.58; transform: scale(1); }
  50% { opacity: 0.82; transform: scale(1.04); }
}

@keyframes cosmos-fade {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes cosmos-drift-a {
  from { transform: scale(1.05) translate3d(-1.4%, -0.8%, 0); }
  to { transform: scale(1.13) translate3d(1.6%, 1.2%, 0); }
}

@keyframes cosmos-drift-b {
  from { transform: scale(1.12) translate3d(1.4%, 1%, 0); }
  to { transform: scale(1.05) translate3d(-1.6%, -1.1%, 0); }
}

@keyframes nebula-roam {
  from { transform: translate3d(-2%, -1.5%, 0) rotate(0deg); }
  to { transform: translate3d(2.5%, 2%, 0) rotate(3deg); }
}

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  :root {
    --mark-width: min(84vw, 520px);
  }

  .cosmos-a {
    background-image: url("./assets/space-portrait.png");
  }

  .cosmos-b {
    background-image: url("./assets/space-landscape.png");
  }

  .scene {
    padding-inline: 1.25rem;
  }

  .destinations {
    width: min(80vw, 360px);
    grid-template-columns: 1fr;
    gap: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cosmos-a,
  .cosmos-b,
  .cosmos-drift,
  .presence,
  .mark-button::before {
    animation: none !important;
  }

  .cosmos-b {
    opacity: 0;
  }

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
  }
}