/*
  interactions.css
  Premium micro-interactions, hover states, and scroll animations.
  Inspired by Apple / Linear / Vercel / Framer / Stripe design language.
  All transforms use GPU-accelerated properties only.
*/

/* ─── Custom easing tokens ──────────────────────────────────────────────── */
:root {
  --ease-premium:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring:    cubic-bezier(0.34, 1.4, 0.64, 1);   /* very slight overshoot */
  --ease-magnetic:  cubic-bezier(0.23, 1, 0.32, 1);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 12px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-xl:  0 20px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
}

/* ─── Respect reduced motion ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── Scroll-reveal base state ──────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity 0.65s var(--ease-out-quart),
              transform 0.65s var(--ease-out-quart);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  transition: opacity 0.55s var(--ease-out-quart),
              transform 0.55s var(--ease-out-quart);
}
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger.is-visible > * { opacity: 1; transform: translate3d(0,0,0); }

/* ─── Divider animate from left ─────────────────────────────────────────── */
hr.divider {
  transform-origin: left center;
  transform: scaleX(0);
  opacity: 0;
  transition: transform 0.7s var(--ease-out-quart),
              opacity   0.4s var(--ease-premium);
}
hr.divider.is-visible {
  transform: scaleX(1);
  opacity: 1;
}

/* ─── Avatar floating + shadow ──────────────────────────────────────────── */
.avatar {
  animation: avatarFloat 5s var(--ease-premium) infinite;
  box-shadow: 0 8px 30px rgba(0,0,0,0.08), 0 0 20px rgba(0,0,0,0.04);
  transition: box-shadow 0.35s var(--ease-premium);
  will-change: transform, box-shadow;
}

.avatar:hover {
  box-shadow: 0 16px 40px rgba(0,0,0,0.16), 0 0 30px rgba(0,0,0,0.08);
}

@keyframes avatarFloat {
  0%, 100% { transform: translate3d(0, 0px, 0); }
  50%       { transform: translate3d(0, -6px, 0); }
}

.avatar img {
  transition: transform 0.35s var(--ease-premium);
  will-change: transform;
}

.avatar:hover img {
  transform: scale(1.06);
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  position: relative;
  overflow: hidden;
  transition: transform  0.28s var(--ease-spring),
              box-shadow 0.28s var(--ease-premium),
              background-color 0.25s var(--ease-premium),
              color            0.25s var(--ease-premium),
              border-color     0.25s var(--ease-premium) !important;
  will-change: transform;
}

.btn:hover {
  transform: translate3d(0, -2px, 0) scale(1.025);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translate3d(0, 0px, 0) scale(0.98);
  box-shadow: var(--shadow-sm);
}

/* Ripple element */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transform: scale(0);
  animation: rippleExpand 0.55s var(--ease-out-quart) forwards;
  pointer-events: none;
}

.primary-btn .ripple { background: rgba(255,255,255,0.22); }
.secondary-btn .ripple { background: rgba(0,0,0,0.06); }

@keyframes rippleExpand {
  to { transform: scale(4); opacity: 0; }
}

/* ─── Social links underline animation ──────────────────────────────────── */
.social-links a {
  position: relative;
  text-decoration: none;
  transition: color 0.25s var(--ease-premium);
}

.social-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.3s var(--ease-out-quart);
}

.social-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* ─── Video cards ────────────────────────────────────────────────────────── */
.video-thumbnail {
  border-radius: 8px;
  transition: transform  0.35s var(--ease-spring),
              box-shadow 0.35s var(--ease-premium);
  will-change: transform;
  transform-style: preserve-3d;
}

.video-thumbnail:hover {
  transform: translate3d(0, -7px, 0);
  box-shadow: var(--shadow-lg);
}

.video-placeholder iframe {
  transition: transform 0.45s var(--ease-premium);
  will-change: transform;
}

.video-thumbnail:hover iframe {
  transform: scale(1.03);
}

/* ─── Testimonial cards ──────────────────────────────────────────────────── */
.testimonial-card {
  transition: transform  0.35s var(--ease-spring),
              box-shadow 0.35s var(--ease-premium);
  will-change: transform;
  transform: translate3d(0, 0, 0);
  border-radius: 10px;
}

.testimonial-card:hover {
  transform: translate3d(0, -6px, 0);
  box-shadow: var(--shadow-lg);
}

/* ─── Service list items ─────────────────────────────────────────────────── */
.service-list li {
  transition: padding-left 0.28s var(--ease-out-quart),
              color        0.25s var(--ease-premium);
  border-radius: 6px;
}

.service-list li:hover {
  padding-left: 0.6rem;
}

/* ─── Section headings (h2) fade-slide ───────────────────────────────────── */
h2 {
  transition: opacity 0.5s var(--ease-out-quart),
              transform 0.5s var(--ease-out-quart);
}

/* ─── Background parallax wrapper ───────────────────────────────────────── */
#wireframe-bg {
  transition: transform 0.1s linear;
  will-change: transform;
}