/*
 * Session 31 Step 2 — Cinematic motion system
 *
 * Page transitions, scroll-revealed sections, card hover, button, photography,
 * and form interactions. Designed to feel intentional rather than gratuitous.
 *
 * All motion respects prefers-reduced-motion. The block at the bottom
 * disables or simplifies animations for users who request it.
 */

/* -------------------------------------------------------------------------- */
/* Variables                                                                  */
/* -------------------------------------------------------------------------- */

:root {
  --motion-fast: 150ms;
  --motion-base: 200ms;
  --motion-slow: 300ms;
  --motion-cinematic: 600ms;
  --motion-ken-burns: 20s;
  --easing-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --easing-out: cubic-bezier(0.0, 0, 0.2, 1);
  --easing-in: cubic-bezier(0.4, 0, 1, 1);
  --easing-decel: cubic-bezier(0.215, 0.61, 0.355, 1);
}

/* -------------------------------------------------------------------------- */
/* Page transitions                                                           */
/* -------------------------------------------------------------------------- */

@keyframes page-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes page-exit {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.page-enter {
  animation: page-enter var(--motion-slow) var(--easing-out) both;
}

.page-exit {
  animation: page-exit var(--motion-base) var(--easing-in) both;
}

/* -------------------------------------------------------------------------- */
/* Scroll-revealed sections (IntersectionObserver target classes)             */
/* -------------------------------------------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--motion-cinematic) var(--easing-out),
    transform var(--motion-cinematic) var(--easing-out);
  will-change: opacity, transform;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--motion-slow) var(--easing-out),
    transform var(--motion-slow) var(--easing-out);
}

[data-reveal-stagger].is-revealed > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger].is-revealed > *:nth-child(2) { transition-delay: 80ms; }
[data-reveal-stagger].is-revealed > *:nth-child(3) { transition-delay: 160ms; }
[data-reveal-stagger].is-revealed > *:nth-child(4) { transition-delay: 240ms; }
[data-reveal-stagger].is-revealed > *:nth-child(5) { transition-delay: 320ms; }
[data-reveal-stagger].is-revealed > *:nth-child(6) { transition-delay: 400ms; }
[data-reveal-stagger].is-revealed > *:nth-child(7) { transition-delay: 480ms; }
[data-reveal-stagger].is-revealed > *:nth-child(8) { transition-delay: 560ms; }

[data-reveal-stagger].is-revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* -------------------------------------------------------------------------- */
/* Photography sections — subtle parallax                                     */
/* -------------------------------------------------------------------------- */
/* Set --parallax-y from JS (translateY at 0.3x scroll speed) on the inner
   layer; the outer layer crops the overflow so the parallax stays contained. */

.parallax-frame {
  position: relative;
  overflow: hidden;
}

.parallax-layer {
  position: absolute;
  top: -10%;
  left: 0;
  right: 0;
  bottom: -10%;
  transform: translate3d(0, var(--parallax-y, 0), 0);
  will-change: transform;
}

/* -------------------------------------------------------------------------- */
/* Hero photography — Ken Burns                                               */
/* -------------------------------------------------------------------------- */

@keyframes ken-burns {
  0% {
    transform: scale(1.0) translate3d(0, 0, 0);
  }
  100% {
    transform: scale(1.08) translate3d(-1.5%, -1%, 0);
  }
}

.ken-burns {
  animation: ken-burns var(--motion-ken-burns) var(--easing-decel) both;
  will-change: transform;
}

/* -------------------------------------------------------------------------- */
/* Hero crossfade carousel                                                    */
/* -------------------------------------------------------------------------- */

.hero-crossfade {
  position: relative;
}

.hero-crossfade > .hero-frame {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1200ms var(--easing-standard);
}

.hero-crossfade > .hero-frame.is-active {
  opacity: 1;
}

/* -------------------------------------------------------------------------- */
/* Card hover treatment                                                       */
/* -------------------------------------------------------------------------- */

.card-hover {
  position: relative;
  transition:
    transform var(--motion-base) var(--easing-out),
    box-shadow var(--motion-base) var(--easing-out);
  will-change: transform;
}

.card-hover:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 48px rgba(8, 10, 13, 0.18);
}

.card-hover .card-photo {
  overflow: hidden;
}

.card-hover .card-photo > img,
.card-hover .card-photo > .card-photo-img {
  transition: transform 600ms var(--easing-out);
  will-change: transform;
}

.card-hover:hover .card-photo > img,
.card-hover:hover .card-photo > .card-photo-img {
  transform: scale(1.05);
}

/* Gold underline accent appears under card title on hover */
.card-hover .card-title {
  position: relative;
}

.card-hover .card-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--gold, #C4A052);
  transition: width var(--motion-slow) var(--easing-out);
}

.card-hover:hover .card-title::after {
  width: 32px;
}

/* -------------------------------------------------------------------------- */
/* Button interactions                                                        */
/* -------------------------------------------------------------------------- */

.btn-cinematic {
  position: relative;
  display: inline-block;
  padding: 14px 28px;
  font-family: var(--font-body, 'Jost', sans-serif);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--gold, #C4A052);
  color: #1F3050;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    box-shadow var(--motion-base) var(--easing-out),
    transform var(--motion-fast) var(--easing-standard),
    background var(--motion-base) var(--easing-out);
}

.btn-cinematic:hover {
  box-shadow: 0 0 24px rgba(196, 160, 82, 0.35);
}

.btn-cinematic:active {
  transform: scale(0.98);
}

.btn-cinematic-secondary {
  background: transparent;
  border: 1px solid var(--border-strong, rgba(196, 160, 82, 0.35));
  color: var(--gold, #C4A052);
  padding: 14px 28px;
  font-family: var(--font-body, 'Jost', sans-serif);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition:
    border-color var(--motion-base) var(--easing-out),
    background var(--motion-base) var(--easing-out),
    color var(--motion-base) var(--easing-out);
  cursor: pointer;
}

.btn-cinematic-secondary:hover {
  border-color: var(--gold, #C4A052);
  background: rgba(196, 160, 82, 0.06);
  color: var(--gold-pale, #E5D4A0);
}

/* Editorial link with gold underline that grows from left */
.link-editorial {
  position: relative;
  display: inline-block;
  color: inherit;
  padding-bottom: 2px;
}

.link-editorial::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--gold, #C4A052);
  transition: width var(--motion-slow) var(--easing-out);
}

.link-editorial:hover::after {
  width: 100%;
}

/* "Read all" / "View all" link with gold arrow that nudges on hover */
.link-read-all {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--gold, #C4A052);
  font-family: var(--font-body, 'Jost', sans-serif);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.link-read-all .arrow {
  transition: transform var(--motion-base) var(--easing-out);
}

.link-read-all:hover .arrow {
  transform: translateX(4px);
}

/* -------------------------------------------------------------------------- */
/* Photography interactions                                                   */
/* -------------------------------------------------------------------------- */

@keyframes lightbox-backdrop-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes lightbox-zoom-in {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox-backdrop {
  animation: lightbox-backdrop-in var(--motion-slow) var(--easing-out) both;
}

.lightbox-frame {
  animation: lightbox-zoom-in var(--motion-slow) var(--easing-decel) both;
  transform-origin: var(--lightbox-origin-x, 50%) var(--lightbox-origin-y, 50%);
}

/* Carousel slide with momentum feel */
.carousel-slide {
  transition: transform var(--motion-cinematic) var(--easing-decel);
}

/* -------------------------------------------------------------------------- */
/* Form interactions                                                          */
/* -------------------------------------------------------------------------- */

.input-cinematic {
  display: block;
  width: 100%;
  padding: 14px 16px;
  background: transparent;
  border: 1px solid var(--border, rgba(196, 160, 82, 0.15));
  color: var(--text, #E8E2D5);
  font-family: var(--font-body, 'Jost', sans-serif);
  font-size: 15px;
  transition:
    border-color var(--motion-base) var(--easing-out),
    box-shadow var(--motion-base) var(--easing-out);
}

.input-cinematic:focus {
  outline: none;
  border-color: var(--gold, #C4A052);
  box-shadow: 0 0 0 3px rgba(196, 160, 82, 0.12);
}

@keyframes form-shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

.form-error-shake {
  animation: form-shake 360ms var(--easing-standard) both;
}

@keyframes check-fade-in {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.form-success-check {
  animation: check-fade-in var(--motion-slow) var(--easing-decel) both;
  color: var(--gold, #C4A052);
}

/* -------------------------------------------------------------------------- */
/* Reduced motion                                                             */
/* -------------------------------------------------------------------------- */
/*
 * For users who prefer reduced motion: disable Ken Burns, parallax,
 * scroll-reveal animations, and shorten/disable hover transforms.
 * Content remains visible — only the motion is removed.
 */

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

  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
  }

  .ken-burns {
    animation: none !important;
    transform: none !important;
  }

  .parallax-layer {
    transform: none !important;
  }

  .card-hover:hover {
    transform: none;
    box-shadow: 0 8px 24px rgba(8, 10, 13, 0.12);
  }

  .card-hover:hover .card-photo > img,
  .card-hover:hover .card-photo > .card-photo-img {
    transform: none;
  }
}