/* ============================================================
   Akif Yaldır — Shared interaction components (Apple-style)
   Used by index.html + case-study pages. Activated by shell.js.
   ============================================================ */

/* ---- Reveal: stagger children — fade only, no vertical "dump" motion ---- */
.reveal-group>* {
  opacity: 0;
  transition: opacity 1s cubic-bezier(.2, .7, .2, 1);
}

.reveal-group.in>* {
  opacity: 1;
}

.reveal-group.in>*:nth-child(2) {
  transition-delay: .08s;
}

.reveal-group.in>*:nth-child(3) {
  transition-delay: .16s;
}

.reveal-group.in>*:nth-child(4) {
  transition-delay: .24s;
}

.reveal-group.in>*:nth-child(5) {
  transition-delay: .32s;
}

.reveal-group.in>*:nth-child(6) {
  transition-delay: .40s;
}

/* ---- Magnetic / press buttons ---- */
.magnetic {
  transition: transform .25s cubic-bezier(.2, .7, .2, 1);
  will-change: transform;
}

.magnetic:active {
  transform: scale(.97) !important;
}

/* arrow nudge inside buttons */
.arr {
  display: inline-block;
  transition: transform .25s var(--ease);
}

.btn:hover .arr,
a:hover>.arr {
  transform: translateX(3px);
}

/* ============================================================
   DEVICE PANEL — gradient backdrop + drifting accent glow
   Pre-framed mockups (iPhone/desktop) drop straight in.
   ============================================================ */
.device-panel {
  position: relative;
  border-radius: var(--radius-xl);
  padding: clamp(28px, 5vw, 72px);
  overflow: hidden;
  isolation: isolate;
  /* Same near-black radial tint the work-page mockup frames use, so the panel
     blends into the page background instead of reading as a grey block. */
  --tint: var(--bg-2);
  background:
    radial-gradient(125% 125% at 28% 0%,
      color-mix(in oklab, var(--tint) 34%, var(--bg-2)),
      color-mix(in oklab, var(--tint) 12%, var(--bg-3)) 72%);
  box-shadow: 0 40px 80px rgba(0, 0, 0, .10), 0 4px 16px rgba(0, 0, 0, .05), inset 0 0 0 1px rgba(255, 255, 255, .7);
}

html[data-mode="dark"] .device-panel {
  box-shadow: 0 40px 90px rgba(0, 0, 0, .6), 0 4px 20px rgba(0, 0, 0, .4), inset 0 0 0 1px rgba(255, 255, 255, .05);
}

@keyframes panelDrift {
  from {
    transform: translate(0, 0) scale(1);
    opacity: .85;
  }

  to {
    transform: translate(-18px, 14px) scale(1.05);
    opacity: 1;
  }
}

.device-panel img {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 1;
  border-radius: var(--radius-sm);
  /* mockups arrive pre-framed; this is just a soft float shadow */
  /* filter: drop-shadow(0 24px 48px rgba(0, 0, 0, .28)); */
}

/* Fallback when no image present */
.device-panel .panel-fallback {
  position: relative;
  z-index: 1;
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--line-strong);
  color: var(--ink-faint);
  font-family: var(--g-code);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ============================================================
   HOVER TILT — subtle 3D on cards/mockups (JS-driven vars)
   ============================================================ */
.tilt {
  transform: perspective(1000px) rotateX(var(--ry, 0deg)) rotateY(var(--rx, 0deg)) translateZ(0);
  transition: transform .4s cubic-bezier(.2, .7, .2, 1), box-shadow .4s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.tilt.lift:hover {
  box-shadow: 0 30px 70px -30px color-mix(in oklab, var(--accent) 30%, transparent);
}

@media (hover: none) {
  .tilt {
    transform: none !important;
  }
}

/* ============================================================
   LOGO GRID — static "Founder of / Trusted by"
   ============================================================ */
.logo-band {
  padding: 56px 0 0;
}

.logo-band .logo-label {
  font-family: var(--g-code);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: center;
  margin: 0 0 28px;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.logo-grid .logo-cell {
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 96px;
  padding: 20px 16px;
  transition: background .3s var(--ease);
}

.logo-grid .logo-cell:hover {
  background: var(--bg-2);
}

.logo-grid .logo-cell img {
  max-height: 80px;
  width: auto;
  opacity: .62;
  /* logos are mono (white-fill) SVGs — force them dark to read on the light surface */
  filter: grayscale(1) brightness(0);
  transition: opacity .3s var(--ease), filter .3s var(--ease);
}

html[data-mode="dark"] .logo-grid .logo-cell img {
  /* invert the same mono logos so the white fill reads on black */
  filter: grayscale(1) brightness(0) invert(1);
  opacity: .55;
}

.logo-grid .logo-cell:hover img {
  opacity: 1;
}

/* Text fallback (shown when no <img> / image fails) */
.logo-grid .logo-cell .logo-text {
  font-family: var(--g-sans);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink-dim);
  transition: color .3s var(--ease);
}

.logo-grid .logo-cell:hover .logo-text {
  color: var(--ink);
}

@media (max-width: 900px) {
  .logo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 540px) {
  .logo-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .logo-grid .logo-cell {
    min-height: 80px;
  }
}

/* ============================================================
   IMAGE SLIDER — scroll-snap carousel on a gradient panel
   <div class="slider" data-slider>
     <div class="slider-track">
       <figure class="slide">...<img>...<figcaption></figcaption></figure>
     </div>
     <button class="slider-btn prev"></button>
     <button class="slider-btn next"></button>
     <div class="slider-dots"></div>
   </div>
   ============================================================ */
.slider {
  position: relative;
  padding-bottom: 24px;
}

.slider-track {
  display: grid;
}

.slider .slide {
  grid-area: 1 / 1;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .55s var(--ease), visibility .55s var(--ease);
}

.slider .slide.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.slider .slide figcaption {
  margin-top: 16px;
  font-family: var(--g-code);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: center;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  cursor: pointer;
  z-index: 5;
  transition: transform .2s var(--ease), background .2s var(--ease), opacity .2s var(--ease);
}

.slider-btn:hover {
  transform: translateY(-50%) scale(1.08);
  background: var(--bg);
}

.slider-btn:active {
  transform: translateY(-50%) scale(.94);
}

.slider-btn.prev {
  left: 14px;
}

.slider-btn.next {
  right: 14px;
}

.slider-btn[disabled] {
  opacity: 0;
  pointer-events: none;
}

.slider-btn svg {
  width: 20px;
  height: 20px;
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.slider-dots button {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: none;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  background: var(--line-strong);
  cursor: pointer;
  padding: 0;
  transition: transform .2s var(--ease), background .2s var(--ease);
}

.slider-dots button.active {
  background: var(--accent);
  transform: scale(1.5);
}

@media (max-width: 640px) {
  .slider-btn {
    display: none;
  }
}

/* ============================================================
   STICKY SCROLL — pinned visual, scrolling narrative
   <div class="sticky-scroll">
     <div class="sticky-media"> ... pinned ... </div>
     <div class="sticky-steps"> .sticky-step* </div>
   </div>
   ============================================================ */
.sticky-scroll {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.sticky-scroll .sticky-media {
  position: sticky;
  top: 96px;
  align-self: start;
}

.sticky-scroll .sticky-steps {
  display: flex;
  flex-direction: column;
}

.sticky-scroll .sticky-step {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  opacity: .35;
  transition: opacity .5s var(--ease);
}

.sticky-scroll .sticky-step.active {
  opacity: 1;
}

.sticky-scroll .sticky-step .step-index {
  font-family: var(--g-code);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}

.sticky-scroll .sticky-step h3 {
  font-family: var(--g-sans);
  font-weight: 600;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
}

.sticky-scroll .sticky-step p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-dim);
  margin: 0;
  max-width: 46ch;
}

/* media swap inside the pinned panel */
.sticky-media .sticky-frame {
  position: relative;
}

.sticky-media .sticky-frame .layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.sticky-media .sticky-frame .layer.active {
  opacity: 1;
  transform: none;
  position: relative;
}

@media (max-width: 860px) {
  .sticky-scroll {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .sticky-scroll .sticky-media {
    position: static;
    margin-bottom: 8px;
  }

  .sticky-scroll .sticky-step {
    min-height: 0;
    opacity: 1;
    padding: 28px 0;
  }

  /* On mobile, show every layer stacked rather than swapping */
  .sticky-media .sticky-frame .layer {
    position: relative;
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {

  .device-panel::before,
  .reveal-group>*,
  .tilt {
    animation: none !important;
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}