/* ============================================================
   shared.css — Variables, Navbar, Footer, Reveal, Typefaces
   Used by all pages
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,700&display=swap');

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --fg: #1d1d1f;
  --dim: #6e6e73;
  --border: rgba(0,0,0,0.07);
  --accent: #0071e3;
  --accent-dim: rgba(0,113,227,0.08);
  --nav-h: 56px;
  --radius: 22px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--fg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Preloader ─────────────────────────────────────────────── */
#loader {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 18px;
}
#loader.gone { display: none !important; }
.loader-ring { width: 48px; height: 48px; }
.loader-arc {
  transform-origin: center;
  animation: loader-spin 1s linear infinite;
  stroke-linecap: round;
}
@keyframes loader-spin {
  to { transform: rotate(360deg); stroke-dashoffset: 0; }
  from { stroke-dashoffset: 138; }
}
#progress { font-size: 1.8rem; font-weight: 800; color: var(--fg); }

/* ── Navbar ────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px;
  background: rgba(245,245,247,0.72);
  backdrop-filter: saturate(200%) blur(22px);
  -webkit-backdrop-filter: saturate(200%) blur(22px);
  border-bottom: 1px solid var(--border);
  z-index: 900;
  transition: background 0.3s, box-shadow 0.3s;
}
.navbar.scrolled {
  background: rgba(245,245,247,0.92);
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}
.nav-logo {
  font-size: 0.85rem; font-weight: 800; letter-spacing: 4px;
  color: var(--fg); text-decoration: none;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.6; }
.nav-links { display: flex; align-items: center; gap: 0; }
.nav-link {
  font-size: 0.82rem; font-weight: 500;
  color: var(--dim); text-decoration: none;
  padding: 6px 12px; border-radius: 10px;
  position: relative; transition: color 0.2s;
}
.nav-link::after {
  content: ''; position: absolute;
  bottom: -2px; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--accent); border-radius: 1px;
  transition: width 0.3s var(--ease);
}
.nav-link:hover { color: var(--fg); }
.nav-link:hover::after,
.nav-link.active::after { width: 80%; }
.nav-link.active { color: var(--fg); }
.nav-cta {
  font-size: 0.82rem; font-weight: 600;
  color: var(--accent); text-decoration: none;
  padding: 7px 16px; border-radius: 20px;
  background: var(--accent-dim);
  transition: background 0.2s, color 0.2s;
}
.nav-cta:hover { background: var(--accent); color: #fff; }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--fg); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Drawer */
.mobile-drawer {
  display: none; flex-direction: column;
  position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: rgba(245,245,247,0.97);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 899; padding: 8px 0 24px;
  transform: translateY(-10px); opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
}
.mobile-drawer.open { display: flex; transform: translateY(0); opacity: 1; }
.mobile-drawer a {
  padding: 15px 28px; font-size: 1rem; font-weight: 500;
  color: var(--fg); text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.mobile-drawer a:hover { background: rgba(0,0,0,0.03); }
.drawer-cta { color: var(--accent) !important; font-weight: 700 !important; border-bottom: none !important; }

/* ── Scroll-reveal base ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

/* Stagger for sibling reveals inside same container */
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }

/* ── Anim-fade-up (for elements loaded immediately) ─────────  */
.anim-fade-up {
  opacity: 0; transform: translateY(32px);
  animation: fadeUp 0.75s var(--ease) forwards;
  animation-delay: var(--d, 0ms);
}
@keyframes fadeUp {
  to { opacity: 1; transform: none; }
}

/* ── Common typography helpers ─────────────────────────────── */
.eyebrow {
  font-size: 0.7rem; letter-spacing: 3px; font-weight: 700;
  color: var(--accent); text-transform: uppercase; margin-bottom: 16px;
  display: block;
}
.section-h {
  font-size: clamp(2rem, 4vw, 3.8rem);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.1;
  margin-bottom: 58px;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--fg); color: #fff;
  padding: 14px 32px; border-radius: 50px;
  font-size: 0.95rem; font-weight: 600; text-decoration: none;
  letter-spacing: 0.01em;
  position: relative; overflow: hidden; isolation: isolate;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}
/* Blue fill sweeps in from left on hover — stays BEHIND text */
.btn-primary::after {
  content: ''; position: absolute; inset: 0; border-radius: 50px;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.38s var(--ease);
  z-index: -1;
}
.btn-primary:hover::after { transform: scaleX(1); }
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,113,227,0.28);
}
.btn-primary.btn-large { padding: 18px 48px; font-size: 1.05rem; }
.btn-ghost {
  display: inline-flex; align-items: center;
  color: var(--accent); font-size: 0.95rem; font-weight: 600;
  text-decoration: none; padding: 14px 20px;
  border-radius: 50px; border: 1.5px solid rgba(0,113,227,0.3);
  position: relative; overflow: hidden; isolation: isolate;
  transition: color 0.3s, border-color 0.3s;
}
.btn-ghost::after {
  content: ''; position: absolute; inset: 0; border-radius: 50px;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.38s var(--ease); z-index: -1;
}
.btn-ghost:hover { color: #fff; border-color: var(--accent); }
.btn-ghost:hover::after { transform: scaleX(1); }

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  background: #000;
  color: rgba(255,255,255,0.45);
  padding: 80px 48px 40px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 4px;
  color: #fff;
  margin-bottom: 40px;
}
.footer-nav {
  display: flex;
  gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.footer-nav a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-nav a:hover {
  color: #fff;
}
.footer-legal-bar {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  font-size: 0.75rem;
  color: #86868b;
}
.footer-legal-bar span {
  margin-right: auto;
}
.footer-legal-bar a {
  color: #fff;
  text-decoration: none;
  transition: opacity 0.2s;
}
.footer-legal-bar a:hover {
  opacity: 0.7;
}

@media (max-width: 600px) {
  .footer-legal-bar { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-legal-bar span { margin-right: 0; margin-bottom: 8px; }
}

/* ── Page CTA ──────────────────────────────────────────────── */
.page-cta {
  padding: 120px 48px; text-align: center; background: var(--fg);
}
.page-cta h2 { font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 700; letter-spacing: -0.03em; color: #fff; margin-bottom: 32px; line-height: 1.1; }
.page-cta .btn-primary { background: #fff; color: var(--fg); }
.page-cta .btn-primary:hover { background: #e5e5ea; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .navbar { padding: 0 20px; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 600px) {
  .navbar { padding: 0 16px; }
  .site-footer { padding: 40px 20px 24px; }
  .page-cta { padding: 80px 20px; }
}