:root {
  color-scheme: dark;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: #080808;
  color: #efefed;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 280px;
  min-height: 100svh;
}

.landing {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 48px;
  padding: 48px 24px 96px;
}

.scene {
  position: relative;
  display: block;
  flex-shrink: 0;
  width: min(400px, 84vw);
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  opacity: 1;
  animation: arrive 1.5s ease-out both;
  transform: perspective(900px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
}

.cradle { display: block; width: 100%; }
.wire { stroke: #828688; stroke-width: .8; }

.pendulum-handle {
  position: absolute;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  transform: translate(-50%, -50%);
  cursor: var(--cursor-grab, grab);
  touch-action: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: border-color .2s, background .2s;
}

.pendulum-handle:hover { border-color: #ffffff18; background: #ffffff04; }
.pendulum-handle:focus-visible { outline: 1px solid #c5c5c5; outline-offset: 3px; }
.scene.is-dragging .pendulum-handle { cursor: var(--cursor-grabbing, grabbing); }

.pendulum-handle::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid #ffffff2e;
  border-radius: 50%;
  opacity: .35;
  pointer-events: none;
  animation: invite-drag 2.8s 1.5s 2;
  transition: opacity .4s;
}

.scene.has-interacted .pendulum-handle::after { opacity: 0; animation: none; }

.interaction-hint {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  color: #858588;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .04em;
  line-height: 1.4;
  white-space: nowrap;
  transform: translateX(-50%);
  pointer-events: none;
  transition: opacity .5s;
}

.interaction-hint[hidden], .hint-keyboard { display: none; }
.interaction-hint svg { width: 16px; height: 12px; }
.scene.has-interacted .interaction-hint { opacity: 0; }
.scene:has(.pendulum-handle:focus-visible) .interaction-hint { opacity: 1; }
.scene:has(.pendulum-handle:focus-visible) .hint-drag { display: none; }
.scene:has(.pendulum-handle:focus-visible) .hint-keyboard { display: inline; }

@keyframes invite-drag {
  0%, 100% { opacity: .35; transform: scale(.94); }
  45% { opacity: .85; transform: scale(1.12); }
}

h1 {
  margin: 0;
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 400;
  letter-spacing: -.065em;
  line-height: 1.08;
  text-align: center;
  animation: arrive 1.5s .15s ease-out both;
}

h1 span { color: #77777a; }

::selection { background: #555; color: #fff; }

@keyframes arrive {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (hover: hover) and (pointer: fine) {
  :root {
    --cursor-grab: url("/cursor-grab.svg") 16 16, grab;
    --cursor-grabbing: url("/cursor-grabbing.svg") 16 16, grabbing;
    cursor: url("/cursor-dot.svg") 16 16, default;
  }

  :root:has(.scene.is-dragging),
  :root:has(.scene.is-dragging) * { cursor: var(--cursor-grabbing); }
}

@media (max-width: 600px) {
  .landing { gap: 36px; padding: 40px 20px 80px; }
  .scene { width: min(330px, 84vw); }
  h1 { font-size: clamp(42px, 12vw, 64px); }
}

@media (max-height: 640px) and (min-width: 601px) {
  h1 { font-size: 54px; }
}

@media (max-height: 480px) {
  .landing { gap: 24px; padding: 28px 20px; }
  .scene { width: min(260px, 60vw); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .scene { transform: none; }
}