/* ============================================================
   TIERLY PRO — GLOBAL STYLES
   Shared across all pages. Page-specific styles remain in each
   HTML file's <style> block.
   ============================================================ */

/* DESIGN TOKENS */
:root {
  --steel: #1C2B3A;
  --steel-mid: #2E4057;
  --steel-deep: #111D27;
  --rust: #C94B2C;
  --rust-light: #E05A38;
  --rust-dark: #A83820;
  --blue: #4A90C4;
  --blue-dark: #3470A0;
  --slate: #4A5568;
  --concrete: #F2EFE9;
  --concrete-dark: #E0DBD1;
  --white: #FAFAF8;
  --text: #1C2B3A;
  --muted: #6B7280;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* BASE TYPOGRAPHY */
body {
  font-family: 'Barlow', sans-serif;
  background: var(--white);
  color: var(--text);
  overflow-x: hidden;
  font-size: 21px;
  line-height: 1.65;
}

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
a { color: inherit; text-decoration: none; }

/* NAV */
nav {
  background: var(--steel);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  border-bottom: 3px solid var(--rust);
}

.nav-logo { font-family: 'Barlow Condensed', sans-serif; font-weight: 700; font-size: 1.6rem; color: var(--white); letter-spacing: 0em; }
.nav-logo span { color: var(--blue); }

.nav-back { font-size: 1rem; font-weight: 500; color: rgba(255,255,255,0.5); display: flex; align-items: center; gap: 0.4rem; transition: color 0.2s; }
.nav-back:hover { color: var(--blue); }

/* SECTION LABEL — shared uppercase eyebrow */
.section-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 0.75rem;
}

/* FOOTER */
footer {
  background: var(--steel-deep);
  padding: 2.5rem 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 3px solid var(--rust);
}

.footer-logo { font-family: 'Barlow Condensed', sans-serif; font-weight: 700; font-size: 1.4rem; color: var(--white); }
.footer-logo span { color: var(--blue); }
.footer-meta { font-size: 0.85rem; color: rgba(255,255,255,0.35); line-height: 1.6; text-align: right; }

/* SCROLL ANIMATION */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}