/* Interactive / motion layer — additive enhancements on top of the base design. */

/* Scroll progress bar (element injected by main.js) */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--teal), var(--amber));
  z-index: 20;
  will-change: transform;
}

/* Floating ambient blobs — gives the background a slow living drift */
.ambient {
  overflow: hidden;
}

.ambient .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  will-change: transform;
}

.ambient .blob-1 {
  width: 38vw;
  height: 38vw;
  top: -8vw;
  left: -6vw;
  background: radial-gradient(circle, rgba(13, 178, 166, 0.45), transparent 70%);
  animation: drift-1 18s ease-in-out infinite;
}

.ambient .blob-2 {
  width: 30vw;
  height: 30vw;
  top: -4vw;
  right: -4vw;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.4), transparent 70%);
  animation: drift-2 22s ease-in-out infinite;
}

.ambient .blob-3 {
  width: 34vw;
  height: 34vw;
  bottom: -10vw;
  right: 10vw;
  background: radial-gradient(circle, rgba(13, 178, 166, 0.35), transparent 70%);
  animation: drift-3 26s ease-in-out infinite;
}

@keyframes drift-1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(6vw, 4vw) scale(1.12); }
}

@keyframes drift-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-5vw, 6vw) scale(1.08); }
}

@keyframes drift-3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-4vw, -5vw) scale(1.15); }
}

/* Header compacts as you scroll */
.site-header {
  transition: padding 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(11, 13, 18, 0.1);
  background: rgba(244, 241, 234, 0.96);
}

.site-header.is-scrolled .nav-shell {
  padding: 12px 0;
}

.nav-shell {
  transition: padding 0.3s ease;
}

/* Animated underline on nav links + active (scroll-spy) state */
.site-nav a {
  position: relative;
  padding-bottom: 4px;
  transition: color 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--teal-dark);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

/* Cursor-tracking 3D tilt + spotlight for cards */
[data-tilt] {
  transform: perspective(800px) rotateX(var(--ry, 0deg)) rotateY(var(--rx, 0deg)) translateZ(0);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  transform-style: preserve-3d;
  position: relative;
  overflow: hidden;
}

[data-tilt]::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    320px circle at var(--mx, 50%) var(--my, 50%),
    rgba(13, 178, 166, 0.16),
    transparent 60%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

[data-tilt].is-hovered::before {
  opacity: 1;
}

[data-tilt].is-hovered {
  box-shadow: 0 26px 50px rgba(11, 13, 18, 0.16);
}

/* Keep the highlighted pricing card's spotlight legible on dark bg */
.pricing-card.highlight[data-tilt]::before {
  background: radial-gradient(
    320px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 179, 71, 0.22),
    transparent 60%
  );
}

/* Card inner content sits above the spotlight layer */
[data-tilt] > * {
  position: relative;
  z-index: 1;
}

/* Magnetic buttons — lean toward the cursor */
.button {
  transform: translate(var(--tx, 0), var(--ty, 0)) translateY(0);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button.is-magnetic {
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

/* Directional, staggered reveals (uses --i index set by JS) */
.reveal {
  transition-delay: calc(var(--i, 0) * 90ms);
}

@media (prefers-reduced-motion: reduce) {
  .ambient .blob {
    animation: none;
  }

  [data-tilt],
  .button,
  .scroll-progress {
    transition: none;
  }

  .reveal {
    transition: none;
    transition-delay: 0ms;
  }
}