/* =====================================================
   Helix Therapeutics — Hero Section
   ===================================================== */

.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0A1F4B 60%, #0D2D6B 100%);
}

/* Molecular dot-pattern overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(37,99,235,.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255,255,255,.02) 0%, transparent 70%);
  pointer-events: none;
}

/* DNA helix SVG background pattern */
.hero::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 560px;
  height: 560px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200' opacity='0.06'%3E%3Ccircle cx='100' cy='100' r='90' fill='none' stroke='white' stroke-width='2'/%3E%3Ccircle cx='100' cy='100' r='60' fill='none' stroke='white' stroke-width='1.5'/%3E%3Ccircle cx='100' cy='100' r='30' fill='none' stroke='white' stroke-width='1'/%3E%3Cline x1='10' y1='100' x2='190' y2='100' stroke='white' stroke-width='1'/%3E%3Cline x1='100' y1='10' x2='100' y2='190' stroke='white' stroke-width='1'/%3E%3C/svg%3E") center/cover no-repeat;
  pointer-events: none;
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.9);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .4rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}
.hero-tag i { color: #60A5FA; }

.hero h1 {
  color: var(--color-white);
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.hero h1 span { color: #60A5FA; }

.hero-desc {
  font-size: 1.125rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 2.25rem;
  max-width: 560px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Stats row in hero */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,.15);
  flex-wrap: wrap;
}
.hero-stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}
.hero-stat-label {
  font-size: .8rem;
  color: rgba(255,255,255,.6);
  margin-top: .25rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* Hero image side (optional) */
.hero-image {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 45%;
  overflow: hidden;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .25;
}

/* ---- Button Variants ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  white-space: nowrap;
  border: 2px solid transparent;
  line-height: 1;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(27,58,107,.3);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,.6);
}
.btn-outline-white:hover {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

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

.btn-sm {
  padding: .5rem 1.25rem;
  font-size: .875rem;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

/* ---- Responsive ---- */
@media (max-width: 960px) {
  .hero-image { display: none; }
  .hero { min-height: 500px; }
}
@media (max-width: 640px) {
  .hero { min-height: auto; padding: 4rem 0; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat-num { font-size: 1.6rem; }
}