/* ─────────────────────────────────────────────────────────
   global.css — Shared styles across all pages
   Header, footer, typography, buttons, utilities.
───────────────────────────────────────────────────────── */

/* ── Google Fonts import ─────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&display=swap');

/* ── Base ────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background: var(--black);
  color: var(--white);
  overflow-x: hidden;
}

/* ── Page wrapper ────────────────────────────────────── */
.page-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--padding-page);
  padding-right: var(--padding-page);
}

/* ── Section spacing ─────────────────────────────────── */
.section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

/* ── Divider ─────────────────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    rgba(255, 255, 255, 0.07),
    transparent
  );
}

/* ── Section labels / eyebrows ───────────────────────── */
.label {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--grey-400);
  margin-bottom: var(--space-md);
}

/* ── Headings ────────────────────────────────────────── */
.heading-xl {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(36px, 5vw, var(--size-xl));
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--white);
}

.heading-lg {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(28px, 3.5vw, 44px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--white);
}

.heading-md {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(20px, 2vw, 28px);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--white);
}

/* ── Body text ───────────────────────────────────────── */
.body-text {
  font-family: var(--font-body);
  font-size: var(--size-base);
  font-weight: 300;
  line-height: 1.8;
  color: var(--grey-400);
}

/* ── Buttons ─────────────────────────────────────────── */
.btn-primary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--black);
  background: var(--white);
  padding: 14px 36px;
  border-radius: 2px;
  transition: opacity var(--transition-base);
}

.btn-primary:hover { opacity: 0.85; }

.btn-outline {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--size-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-200);
  background: transparent;
  padding: 13px 36px;
  border-radius: 2px;
  border: var(--border-medium);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.btn-outline:hover {
  border-color: var(--white);
  color: var(--white);
}

/* ── Fade-in animation (Intersection Observer) ───────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }

/* ─────────────────────────────────────────────────────────
   HEADER
───────────────────────────────────────────────────────── */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px var(--padding-page);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(to bottom, rgba(0,0,0,0.9) 0%, transparent 100%);
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

#header.scrolled {
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
}

/* Logo image */
.logo-link {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 52px;
  width: auto;
  display: block;
}

/* Desktop nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav a {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-200);
  transition: color var(--transition-base);
}

.nav a:hover { color: var(--white); }

.nav .nav-cta {
  border: var(--border-subtle);
  padding: 8px 20px;
  border-radius: 2px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.nav .nav-cta:hover {
  border-color: var(--white);
  color: var(--white);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--white);
  transition: var(--transition-base);
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.mobile-nav a:hover { opacity: 1; }

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: var(--padding-page);
  font-family: var(--font-body);
  font-size: var(--size-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey-400);
  cursor: pointer;
  background: none;
  border: none;
  transition: color var(--transition-base);
}

.mobile-nav-close:hover { color: var(--white); }

/* ─────────────────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────────────────── */
#footer {
  border-top: var(--border-subtle);
  padding: 40px var(--padding-page);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-md);
}

.footer-nav {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.footer-nav a {
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey-400);
  transition: color var(--transition-base);
}

.footer-nav a:hover { color: var(--white); }

.footer-copy {
  text-align: right;
  font-family: var(--font-body);
  font-size: var(--size-xs);
  font-weight: 300;
  color: var(--grey-400);
  letter-spacing: 0.05em;
}

/* ─────────────────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
  :root { --padding-page: 32px; }
}

@media (max-width: 768px) {
  :root {
    --padding-page: 24px;
    --space-xl: 80px;
  }

  #header { padding: 16px var(--padding-page); }
  .nav { display: none; }
  .hamburger { display: flex; }

  .logo-img { height: 28px; }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 20px;
  }

  .footer-copy { text-align: center; }
  .footer-inner .logo-link { justify-content: center; }
}

@media (max-width: 390px) {
  :root { --padding-page: 20px; }
  .logo-img { height: 34px; }
}