/* =================================================================
   HanOxynoil AG — temporary launch site
   Deep petroleum-navy operator credibility. OKLCH throughout.
   ================================================================= */

:root {
  --bg:        oklch(0.158 0.030 248);
  --bg-deep:   oklch(0.125 0.026 248);

  --ink:       oklch(0.972 0.005 240);
  --ink-soft:  oklch(0.866 0.012 240);
  --muted:     oklch(0.745 0.020 244);

  --steel:     oklch(0.720 0.078 236);
  --signal:    oklch(0.770 0.130 168);   /* petroleum green/teal */
  --signal-ink:oklch(0.840 0.110 168);

  --hairline:  oklch(0.78 0.03 244 / 0.14);

  --sans: "Archivo", "Helvetica Neue", Arial, system-ui, sans-serif;
  --maxw: 46rem;

  --r-sm: 8px;
  --r-lg: 22px;

  --z-backdrop: 0;
  --z-base: 1;

  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink-soft);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: oklch(0.770 0.130 168 / 0.30); color: var(--ink); }

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

[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--signal-ink);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =================================================================
   Backdrop — seismic strata + glow + vignette
   ================================================================= */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-backdrop);
  pointer-events: none;
  overflow: hidden;
}
.backdrop__strata {
  position: absolute;
  inset: -8% -2% -2%;
  background: url("assets/strata.svg") center top / cover no-repeat;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 80%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 80%, transparent);
  opacity: 0.85;
  animation: drift 46s linear infinite;
}
.backdrop__glow {
  position: absolute;
  top: -18vh; left: 50%;
  width: min(120vw, 1100px);
  aspect-ratio: 1.6 / 1;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 50%, oklch(0.40 0.075 232 / 0.5), transparent 70%);
  filter: blur(12px);
}
.backdrop__grain {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 95% at 50% 10%, transparent 52%, oklch(0.10 0.02 248 / 0.55) 100%);
}
@keyframes drift {
  from { transform: translateY(0); }
  to   { transform: translateY(-3%); }
}

/* =================================================================
   Stage — single centered column
   ================================================================= */
.stage {
  position: relative;
  z-index: var(--z-base);
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(3rem, 9vh, 6rem) clamp(1.25rem, 5vw, 2.5rem);
}
.stage__inner {
  width: 100%;
  max-width: var(--maxw);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* logo plate — official logo presented on a clean light card */
.logoplate {
  width: min(100%, 26rem);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  background: #ffffff;
  border-radius: var(--r-lg);
  box-shadow:
    0 1px 0 oklch(1 0 0 / 0.6) inset,
    0 30px 70px -28px oklch(0.08 0.03 248 / 0.85),
    0 8px 22px -16px oklch(0.05 0.02 248 / 0.7);
}
.logoplate img { width: 100%; height: auto; }

/* headline */
.headline {
  margin: clamp(2.4rem, 6vw, 3.4rem) 0 0;
  font-weight: 800;
  font-size: clamp(2rem, 1.3rem + 3.4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--ink);
  text-wrap: balance;
}

.lead {
  margin: clamp(1.1rem, 3vw, 1.6rem) 0 0;
  max-width: 44ch;
  font-size: clamp(1.02rem, 0.98rem + 0.4vw, 1.18rem);
  color: var(--ink-soft);
  text-wrap: pretty;
}

/* cta */
.cta {
  margin-top: clamp(2rem, 5vw, 2.75rem);
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cta__soon {
  font-size: 0.92rem;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  color: oklch(0.15 0.03 248);
  background: var(--signal);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.4s var(--ease-out-quint),
              background-color 0.3s ease,
              box-shadow 0.4s var(--ease-out-quint);
  box-shadow: 0 1px 0 oklch(0.97 0.05 168 / 0.25) inset,
              0 10px 30px -12px oklch(0.55 0.13 168 / 0.7);
}
.btn svg { transition: transform 0.4s var(--ease-out-quint); }
.btn:hover {
  background: var(--signal-ink);
  transform: translateY(-2px);
  box-shadow: 0 1px 0 oklch(0.97 0.05 168 / 0.3) inset,
              0 16px 36px -12px oklch(0.55 0.13 168 / 0.8);
}
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: translateY(0); }

/* =================================================================
   Footer
   ================================================================= */
.footer {
  position: relative;
  z-index: var(--z-base);
  text-align: center;
  padding: clamp(1.75rem, 4vw, 2.5rem) 1.5rem;
  border-top: 1px solid var(--hairline);
  background: oklch(0.13 0.026 248 / 0.6);
}
.footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* =================================================================
   Entrance motion — pure CSS, content visible by default
   ================================================================= */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: rise 0.85s var(--ease-out-quint) both;
    animation-delay: var(--d, 0ms);
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .backdrop__strata { animation: none; }
}