/* ============================================
   AERO — Style Sheet
   ============================================ */

/* ---------- CONFIG ---------- */
:root {
  --xray-radius: 180px;
  --feather-size: 80px;

  --color-bg: #08090d;
  --color-nav: rgba(3, 6, 16, 0.256);
  --color-accent: #ff1925;
  --color-text: #e8e4dc;
  --color-dim: rgba(245, 242, 237, 0.724);
  --font-display: 'Barlow', sans-serif;
  --font-ui: 'Share Tech Mono', monospace;
  --nav-h: 64px;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { 
  background: linear-gradient(160deg,
    rgba(0, 0, 0, 1) 20%,
    rgb(4, 6, 23) 60%,
    rgb(46, 2, 15) 100%
  );
  background-attachment: fixed;
  color: var(--color-text);
  overflow-x: hidden;
}
img { display: block; width: 100%; height: 100%; object-fit: cover; user-select: none; -webkit-user-drag: none; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  z-index: 100;
  background: var(--color-nav);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(168, 197, 218, 0.10);
}

.nav__logo {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  letter-spacing: 0.38em;
  color: var(--color-accent);
}

.nav__logo-img {
  height: 32px;        /* adjust to taste */
  width: auto;
  object-fit: contain;
}

.nav__links {
  display: flex;
  gap: 2.6rem;
}

.nav__links a {
  font-family: var(--font-ui);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-dim);
  transition: color 0.25s;
  position: relative;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 100%;
  height: 1px;
  background: var(--color-accent);
  transition: right 0.3s ease;
}
.nav__links a:hover { color: var(--color-text); }
.nav__links a:hover::after { right: 0; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}
.nav__hamburger span {
  width: 22px; height: 1.5px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ---------- MOBILE NAV DRAWER ---------- */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(8, 9, 13, 0.96);
  backdrop-filter: blur(16px);
  z-index: 99;
  padding: 1.5rem 2rem 2rem;
  border-bottom: 1px solid rgba(168,197,218,0.1);
  transform: translateY(-110%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav ul { display: flex; flex-direction: column; gap: 1.1rem; }
.mobile-nav a {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-dim);
  transition: color 0.2s;
}
.mobile-nav a:hover { color: var(--color-accent); }

/* ============================================================
   DESKTOP HERO
============================================================ */
.desktop-hero {
  display: block;
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.mobile-hero-wrap { display: none; }

.hero__layer {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}
.hero__layer--exterior { z-index: 2; }
.hero__layer--xray     { z-index: 1; }

.xray-canvas {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
}

/* ---------- HERO TITLE ---------- */
.hero__title {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  padding-top: 120px;
  padding-left: 3rem;
  z-index: 10;
  text-align: left;
  pointer-events: none;
}

.hero__title-sub {
  font-family: var(--font-ui);
  font-size: 1.2rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.8rem;
  opacity: 0.75;
}

.hero__title h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  text-shadow: 0 2px 40px rgba(0,0,0,0.8);
  margin-left: -0.05em;
}

/* ---------- CTA BUTTONS — desktop ---------- */
.hero__cta {
  position: absolute;
  bottom: 50%;                    /* centers vertically */
  transform: translateY(50%) translateY(-3rem);     /* corrects for element's own height */
  right: 2.5rem;
  display: flex;
  gap: 1rem;
  z-index: 10;
}

.btn {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.75rem 1.6rem;
  border: 1px solid rgba(204, 34, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  cursor: pointer;
}

.btn--primary {
  background: rgba(168, 197, 218, 0.15);
  color: var(--color-text);
}
.btn--primary:hover {
  background: rgba(168, 197, 218, 0.3);
  border-color: var(--color-accent);
}

.btn--secondary {
  background: transparent;
  color: var(--color-dim);
}
.btn--secondary:hover {
  color: var(--color-text);
  border-color: rgba(168, 197, 218, 0.6);
}

/* ============================================================
   MOBILE HERO — scroll fade
============================================================ */
@media (max-width: 768px) {
  .desktop-hero    { display: none; }
  .mobile-hero-wrap { display: block; }

  .nav__links      { display: none; }
  .nav__hamburger  { display: flex; }
  .mobile-nav      { display: block; }
}

/* Outer wrapper — tall enough to drive the scroll */
.mobile-hero-wrap {
  position: relative;
  /* spacer height is set in HTML via .mobile-scroll-spacer */
}

.mobile-scroll-spacer {
  /* Extra scroll distance beyond the sticky viewport.
     Increase this to make the fade take longer to complete. */
  height: 100vh;
}

/* Sticky container — stays pinned while user scrolls through spacer */
.mobile-sticky {
  position: sticky;
  top: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Both image layers fill the sticky container */
.mobile-layer {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}

.mobile-layer--bottom { z-index: 1; }
.mobile-layer--top    { z-index: 2; transition: opacity 0.05s linear; }

.mobile-img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ---------- MOBILE TITLE — top center ---------- */
.hero__title--mobile {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: calc(var(--nav-h) + 2rem);
  z-index: 10;
  text-align: center;
  pointer-events: none;
}

.hero__title--mobile .hero__title-sub {
  font-size: 0.9rem;
  letter-spacing: 0.28em;
}

.hero__title--mobile h1 {
  font-size: clamp(2.2rem, 9vw, 3.5rem);
  margin-left: 0; /* reset desktop offset */
  text-shadow: 0 2px 30px rgba(0,0,0,0.9);
}

/* ---------- MOBILE CTA — center screen ---------- */
.hero__cta--mobile {
  position: absolute;
  bottom: 5rem;          /* above scroll prompt */
  left: 0; right: 0;
  top: auto;             /* remove the full-height centering */
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.hero__cta--mobile.visible {
  opacity: 1;
  pointer-events: all;
}

/* ---------- SCROLL PROMPT ---------- */
.scroll-prompt {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-dim);
  pointer-events: none;
  animation: promptBob 2s ease-in-out infinite;
  transition: opacity 0.4s ease;
}

.scroll-prompt svg {
  width: 22px; height: 22px;
  stroke: var(--color-accent);
}

.scroll-prompt span {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  opacity: 0.9;
}

.scroll-prompt.hidden { opacity: 0; }

@keyframes promptBob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}