:root {
  --fg: #fff;
  --dim: rgba(255, 255, 255, 0.55);
  --line: rgba(255, 255, 255, 0.14);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

/* Class display rules (.btn, .inquiry) would otherwise beat the UA's
   [hidden] { display: none }, since a class outranks an attribute default. */
[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: #000;
  color: var(--fg);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Starfield canvas sits over faint nebula washes on pure black. */
#sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 60% 50% at 18% 22%, rgba(90, 70, 170, 0.22), transparent 62%),
    radial-gradient(ellipse 55% 45% at 82% 72%, rgba(40, 95, 170, 0.18), transparent 62%),
    radial-gradient(ellipse 40% 30% at 55% 40%, rgba(170, 60, 120, 0.1), transparent 60%),
    #000;
}

#stage {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.2rem;
  padding: 4rem 1.25rem 5rem;
  text-align: center;
}

.title {
  margin: 0;
  font-weight: 600;
  font-size: clamp(2.4rem, 7.5vw, 5.75rem);
  letter-spacing: -0.025em;
  line-height: 1.05;
  text-shadow: 0 0 28px rgba(255, 255, 255, 0.25);
}

.title.small {
  font-size: clamp(1.6rem, 4.5vw, 3rem);
}

.btn {
  appearance: none;
  display: inline-block;
  border: 0;
  border-radius: 999px;
  background: #fff;
  color: #000;
  font: inherit;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.02em;
  padding: 0.9rem 2.3rem;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    box-shadow 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 34px rgba(255, 255, 255, 0.35);
}

.btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* inquiry form */
.inquiry {
  width: min(100%, 26rem);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.4rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.inquiry label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--dim);
}

.inquiry input,
.inquiry textarea {
  font: inherit;
  font-size: 1rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0.6rem;
  padding: 0.65rem 0.8rem;
  resize: vertical;
}

.inquiry input:focus,
.inquiry textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.65);
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.row {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  margin-top: 0.3rem;
}

.link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--dim);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link:hover {
  color: #fff;
}

.status {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.9rem;
  color: var(--dim);
}

.status.ok {
  color: #fff;
}

.inquiry.sent label,
.inquiry.sent .row {
  display: none;
}

.foot {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 1rem 1.25rem;
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
}