/* ============================================================
   MOON — HEADER + HERO (ISOLATED, PERFECT, UNTOUCHED)
   ============================================================ */

/* ===================== THEME ===================== */
:root {
  --bg: #000;
  --ink: #e8e8e8;
  --muted: #8f8f8f;

  --page-ms: 900ms;
  --page-ease: cubic-bezier(.22,.61,.36,1);
}

/* ===================== RESET ===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

/* ===================== PAGE TRANSITION ===================== */
body {
  font-family: "Syne", sans-serif;
  background: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
  letter-spacing: 0.02em;

  opacity: 0;
  filter: blur(6px);
  transform: translateY(10px);
  transition:
    opacity var(--page-ms) var(--page-ease),
    filter var(--page-ms) var(--page-ease),
    transform var(--page-ms) var(--page-ease);
}

body.page-ready {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

/* ===================== HEADER ===================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;

  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;

  height: 65px;
  padding: 0 clamp(10px, 4vw, 28px);

  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(6px);
  z-index: 20;

  opacity: 0;
  transform: translateY(-14px);
  transition:
    opacity 0.8s var(--page-ease),
    transform 0.8s var(--page-ease);
}

body.page-ready .header {
  opacity: 1;
  transform: translateY(0);
}

/* NAV */
.nav {
  display: flex;
  gap: clamp(18px, 4vw, 40px);

  opacity: 0;
  transform: translateY(-6px);
  transition:
    opacity 0.6s var(--page-ease),
    transform 0.6s var(--page-ease);
}

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

.nav-link {
  position: relative;
  text-decoration: none;
  color: var(--muted);
  font-size: clamp(12px, 1.6vw, 16px);
  padding: 6px 4px;

  opacity: 0;
  transform: translateY(12px);
  transition:
    color .25s ease,
    transform .6s var(--page-ease),
    opacity .6s var(--page-ease);
}

nav.nav-visible .nav-link {
  opacity: 1;
  transform: translateY(0);
}

nav.nav-visible .nav-link:nth-child(1) { transition-delay: .15s; }
nav.nav-visible .nav-link:nth-child(2) { transition-delay: .25s; }
nav.nav-visible .nav-link:nth-child(3) { transition-delay: .35s; }
nav.nav-visible .nav-link:nth-child(4) { transition-delay: .45s; }

.nav-link:hover {
  color: var(--ink);
  transform: translateY(-3px);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #ffffffc9, #858585, #ffffff00);
  transform: translateX(-50%);
  transition: width .3s ease;
}

.nav-link:hover::after {
  width: 60%;
}

@media (max-width: 600px) {
  .header { height: 60px; }
  .nav { gap: 18px; }
  .nav-link { font-size: 13px; }
}

/* ===================== HERO ===================== */
.black-void {
  width: 100%;
  min-height: 100vh;

  display: flex;
  align-items: center;
  justify-content: center;

  padding: 140px 20px 120px;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  width: 100%;
}

/* Moon Image */
.moon-visual {
  width: 55vh;
  max-width: 420px;
  min-width: 180px;
  height: auto;
  border-radius: 50%;
  z-index: 1;

  margin-bottom: -2vh;

  opacity: 0;
  transition: opacity 3s ease;
}

.moon-visual-visible {
  opacity: 1;
}

/* Text */
.moon-text {
  width: 60%;
  max-width: 400px;
  height: auto;
  margin-bottom: 1.5vh;
  z-index: 2;
}

.slogan-text {
  width: 80%;
  max-width: 500px;
  height: auto;
  opacity: 0.8;
  z-index: 1;
}

/* Fly-in animation */
.fly-in {
  opacity: 0;
  will-change: transform, opacity, filter;
}

.fly-in-active {
  animation: fromBehindCamera 4s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

@keyframes fromBehindCamera {
  0% {
    opacity: 0;
    transform: scale(20);
    filter: blur(40px);
  }
  10% { opacity: 1; }
  100% {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  .moon-text { width: 70%; }
  .slogan-text { width: 90%; }
  .black-void { padding: 120px 16px 90px; }
}

@media (max-width: 600px) {
  .moon-visual {
    width: 90vw;
    max-width: 340px;
    min-width: 200px;
    margin-bottom: -1vh;
  }
  .moon-text { width: 75vw; }
  .slogan-text { width: 85vw; }
}

/* ============================================================
   END — HEADER + HERO (LOCKED)
   ============================================================ */