/* GSAP Animation Support Styles */
.eyebrow, #hero-title, .hero-summary-line, .hero-actions .button, .profile-panel, .portrait-visual, .meta-item {
  will-change: transform, opacity;
}

.site-header {
  transition: background 0.3s ease, box-shadow 0.3s ease, height 0.3s ease;
}

.site-header.scrolled {
  background: rgba(15, 44, 56, 0.95) !important;
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.button:active, .icon-link:active {
  transform: scale(0.97) translateY(0);
  transition: transform 0.1s ease;
}

.copy-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 24px;
  background: rgba(95, 184, 201, 0.95);
  color: #0f2c38;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Scroll Indicator */
.scroll-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  z-index: 100;
  transition: width 0.1s linear;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: rgba(18, 23, 28, 0.9);
  border: 1px solid rgba(95, 184, 201, 0.3);
  border-radius: 12px;
  color: var(--accent);
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 50;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(95, 184, 201, 0.2);
  border-color: var(--accent);
  transform: translateY(-5px);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid rgba(95, 184, 201, 0.2);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Nav current section indicator */
.nav-links a[data-section].in-view {
  color: var(--accent);
  background: rgba(95, 184, 201, 0.1);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 16px;
    background: rgba(15, 44, 56, 0.98);
    backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s ease;
    z-index: 99;
  }
  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav-links a {
    width: 100%;
    padding: 14px 16px;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-indicator { display: none; }
  .back-to-top { transition: none; }
}