/* xnalabs.com — parent brand site
 * Type: shared with both products (DM Sans + Instrument Serif + Azeret Mono).
 * Pill colors: xnacloud cyan→violet, drxna brand gradient.
 */

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

body {
  background: #07090d url("../img/bcell.jpg") center 30% / cover no-repeat;
  font-family: 'DM Sans', sans-serif;
  color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ------------------------------------------------------------------------- */
/* Hero — full-viewport stage with dark stripe overlay for text contrast.    */
/* ------------------------------------------------------------------------- */

.hero {
  position: relative;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Dark horizontal stripe — bcell breathes above and below, content sits on dark. */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(7, 9, 13, 0.05) 0%,
    rgba(7, 9, 13, 0.10) 22%,
    rgba(7, 9, 13, 0.78) 38%,
    rgba(7, 9, 13, 0.90) 50%,
    rgba(7, 9, 13, 0.78) 62%,
    rgba(7, 9, 13, 0.10) 78%,
    rgba(7, 9, 13, 0.05) 100%
  );
}

/* ------------------------------------------------------------------------- */
/* Brand bar — logo top-left, label top-right.                                */
/* ------------------------------------------------------------------------- */

.brand-bar {
  position: absolute;
  top: 32px;
  left: 40px;
  right: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
}
.brand-bar img {
  width: 180px;
  height: auto;
  opacity: 0.95;
}
.brand-meta {
  font-family: 'Azeret Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

/* ------------------------------------------------------------------------- */
/* Hero content — headline + actions, settles in on load.                    */
/* ------------------------------------------------------------------------- */

.hero-content {
  position: relative;
  z-index: 5;
  text-align: center;
  padding: 0 2rem;
  animation: settle 0.8s ease-out both;
}
@keyframes settle {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 4rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  max-width: 22ch;
  margin: 0 auto;
}
.accent-serif {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-weight: 400;
}

/* ------------------------------------------------------------------------- */
/* Action pills — symmetric pair, each branded to its destination product.   */
/* ------------------------------------------------------------------------- */

.hero-actions {
  display: flex;
  gap: 80px;
  justify-content: center;
  align-items: center;
  margin-top: 2.5rem;
}
.cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 22px 28px;
  text-decoration: none;
  cursor: pointer;
}
.cta-circle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-radius 0.3s ease;
  pointer-events: none;
}
.cta-text {
  position: relative;
  z-index: 1;
  color: #fff;
  font-size: 16px;
  white-space: nowrap;
}
.cta-text--mono {
  font-family: 'Azeret Mono', monospace;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.cta-text--sans {
  font-weight: 600;
}

/* Hover expansion only on devices with real hover (mouse / trackpad).
   Touch devices skip this — otherwise the first tap triggers the expansion
   and the user has to tap again to follow the link. */
@media (hover: hover) and (pointer: fine) {
  .cta:hover .cta-circle {
    width: calc(100% + 16px);
    border-radius: 32px;
  }
}
/* Brief tap feedback on touch devices: subtle scale-up on press. */
@media (hover: none) {
  .cta:active .cta-circle {
    transform: translate(-50%, -50%) scale(1.15);
    transition: transform 0.12s ease;
  }
}

/* ------------------------------------------------------------------------- */
/* Responsive                                                                */
/* ------------------------------------------------------------------------- */

/* Tablet (600–900px): tighten the headline, let pills stack with comfortable gap. */
@media (max-width: 900px) {
  h1 { font-size: 3rem; }
  .hero-actions { flex-wrap: wrap; gap: 32px; }
}

/* Phone (<600px): bcell scaled up 50%, dark band strengthened where text sits,
   "Precision Medicine" forced onto its own line, brand-meta moves to bottom-right
   so logo (top-left) and label (bottom-right) frame the page. */
@media (max-width: 600px) {
  body {
    background: #07090d url("../img/bcell.jpg") center center / 150% no-repeat;
  }
  .hero::before {
    background: linear-gradient(
      180deg,
      rgba(7, 9, 13, 0.40) 0%,
      rgba(7, 9, 13, 0.30) 22%,
      rgba(7, 9, 13, 0.88) 38%,
      rgba(7, 9, 13, 0.94) 55%,
      rgba(7, 9, 13, 0.92) 70%,
      rgba(7, 9, 13, 0.88) 82%,
      rgba(7, 9, 13, 0.95) 100%
    );
  }
  h1 { font-size: 2.25rem; line-height: 1.15; }
  .accent-serif { display: block; margin-top: 0.15em; }
  .hero-actions { gap: 24px; margin-top: 2rem; }
  .brand-bar { top: 20px; left: 24px; right: 24px; }
  .brand-bar img { width: 140px; }
  .brand-bar .brand-meta { display: none; }
  .brand-foot {
    position: absolute;
    bottom: 24px;
    right: 24px;
    font-family: 'Azeret Mono', monospace;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
    z-index: 10;
  }
}
/* Hide the bottom anchor on desktop — it lives in the brand bar there. */
@media (min-width: 601px) {
  .brand-foot { display: none; }
}

/* Landscape phones / very short viewports. */
@media (max-height: 500px) {
  .hero-content { padding: 0 1.5rem; }
  h1 { font-size: 2rem; }
  .hero-actions { margin-top: 1.25rem; gap: 24px; }
}