/* ============================================
   CSS Variables & Constants
   ============================================ */
:root {
  --transition: all 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-fast: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --image-height: 350px;
  --preview-width: 300px;
  --preview-opacity: 0.6;
  --center-top: 10vh;
  --image-alignment: calc(10vh + 20px + 16px + 16px + 14px);
  /* Fluid card width for all projects/info/facts on desktop */
  --card-width: clamp(320px, 48vw, 640px);
}

/* ============================================
   Page Transition
   ============================================ */

body {
  opacity: 0;
  transition: opacity 0.6s ease-in-out;
}

body.fade-in {
  opacity: 1;
}

/* ============================================
   Base Styles & Visibility
   ============================================ */

/* Hide all projects, info and facts by default to prevent flicker before JS runs */
.project,
.info,
.facts {
  display: none;
}

/* Only show the currently active ones */
.project.visible,
.info.visible,
.facts.visible {
  display: block;
}

/* Ensure only the active items render */
.project:not(.visible):not(.next):not(.previous),
.info:not(.visible),
.facts:not(.visible) {
  display: none !important;
}

/* Base project container */
.project {
  font-size: clamp(18px, 1.8vw, 24px);
  color: rgb(45, 45, 45);
  line-height:5px;
  font-weight: 400;
  cursor: default;
  padding: 20px;
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: left;
  max-width: var(--card-width);
  margin: 0 auto;
  position: absolute;
  top: var(--center-top);
  left: 50%;
  transform: translateX(-50%);
  width: var(--card-width);
  max-width: var(--card-width);
  z-index: 1;
  box-sizing: border-box;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform, opacity;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Base project images */
.project img {
  max-width: 100%;
  width: 100%;
  height: var(--image-height);
  display: block;
  opacity: 1;
  border: 0.5px solid black;
  margin: 0;
  object-fit: cover;
  flex-shrink: 0; /* Prevent image from shrinking */
}

/* ============================================
   Project States: Visible, Next, Previous
   ============================================ */

/* Main visible project in center */
.project.visible {
  opacity: 1 !important;
  align-items: flex-start !important;
  padding: 15px !important;
}

/* Next preview on the right - same size as center, just offset so only a bit shows */
.project.next {
  display: flex !important;
  position: absolute;
  left: 50%;
  top: var(--image-alignment);
  transform: translateX(calc(50vw - (var(--card-width) / 2)));
  width: var(--card-width);
  max-width: var(--card-width);
  padding: 20px;
  opacity: var(--preview-opacity);
  z-index: 0;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1), 
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  align-items: flex-start;
  align-content: flex-start;
  cursor: pointer;
  will-change: transform, opacity;
  backface-visibility: hidden;
  box-sizing: border-box !important;
  overflow: hidden !important;
}

.project.next img {
  transition: none; /* no animation on image size/opacity */
  align-self: flex-start;
}

.project.next p {
  display: none;
}

/* Previous preview on the left - same size as center, just offset so only a bit shows */
.project.previous {
  display: flex !important;
  position: absolute;
  left: 50%;
  top: var(--image-alignment); /* Align image area with center image */
  transform: translateX(calc(-50vw - (var(--card-width) / 2)));
  width: var(--card-width);
  max-width: var(--card-width);
  padding: 20px;
  opacity: var(--preview-opacity);
  z-index: 0;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1), 
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  align-items: flex-start;
  align-content: flex-start;
  cursor: pointer;
  will-change: transform, opacity;
  backface-visibility: hidden;
  box-sizing: border-box;
}

.project.previous img {
  transition: none; /* no animation on image size/opacity */
  align-self: flex-start;
}

.project.previous p {
  display: none;
}

/* ============================================
   Animation States: Forward Navigation
   ============================================ */

/* Visible moves to left (becomes previous) */
.project.visible.moving-left {
  left: 50%;
  transform: translateX(calc(-50vw - (var(--card-width) / 2)));
  opacity: var(--preview-opacity);
  z-index: 0;
  top: var(--image-alignment);
}

.project.visible.moving-left p {
  display: none;
}

.project.visible.moving-left img {
  display: block;
  width: 100%;
  height: var(--image-height);
  object-fit: cover;
}

/* Visible moves to become previous */
.project.visible.moving-to-previous {
  left: 50%;
  transform: translateX(calc(-50vw - (var(--card-width) / 2))) !important; /* same final x-position as .project.previous */
  opacity: 1; /* Full opacity during movement, fades in Phase 2 */
  z-index: 0;
  top: var(--image-alignment) !important;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.project.visible.moving-to-previous.fade-opacity {
  opacity: var(--preview-opacity) !important;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1) !important;
  will-change: opacity;
}

.project.visible.moving-to-previous p {
  display: none;
}

/* Next preview moves to center (becomes visible) */
.project.next.moving-center {
  left: 50%;
  transform: translateX(-50%);
  width: var(--card-width) !important;
  max-width: var(--card-width) !important;
  padding: 15px !important;
  opacity: 1 !important;
  z-index: 1;
  top: var(--center-top) !important;
  align-items: flex-start !important;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1) !important;
  transition-property: transform, opacity !important;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.project.next.moving-center p {
  display: block;
}

.project.next.moving-center img {
  transition: none !important;
  width: 100% !important;
  max-width: 100% !important;
}

/* New next element appears from the right */
.project.next.moving-in-from-right,
.project.moving-in-from-right.next {
  left: 50%;
  transform: translateX(calc(50vw + (var(--card-width) / 2))) !important;
  width: var(--card-width);
  max-width: var(--card-width);
  padding: 20px !important;
  opacity: var(--preview-opacity) !important;
  z-index: 0;
  top: var(--image-alignment) !important;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

/* ============================================
   Animation States: Backward Navigation
   ============================================ */

/* Visible moves to become next (backward) */
.project.visible.moving-to-next {
  left: 50%;
  transform: translateX(calc(50vw - (var(--card-width) / 2))) !important;
  opacity: 1; /* Full opacity during movement, will fade in Phase 2 */
  z-index: 0;
  top: var(--image-alignment) !important;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.project.visible.moving-to-next.fade-opacity {
  opacity: var(--preview-opacity);
  transition: opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.project.visible.moving-to-next p {
  display: none;
}

/* Previous preview moves to center (becomes visible) */
.project.previous.moving-center {
  left: 50%;
  transform: translateX(-50%);
  width: var(--card-width) !important;
  max-width: var(--card-width) !important;
  padding: 15px !important;
  opacity: 1 !important;
  z-index: 1;
  top: var(--center-top) !important;
  align-items: flex-start !important;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1) !important;
  transition-property: transform, opacity !important;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.project.previous.moving-center p {
  display: block;
}

/* New previous element appears from the left */
.project.previous.moving-in-from-left,
.project.moving-in-from-left.previous {
  left: 50%;
  transform: translateX(calc(-50vw - (var(--card-width) / 2))) !important;
  width: var(--card-width);
  max-width: var(--card-width);
  padding: 20px !important;
  opacity: var(--preview-opacity) !important;
  z-index: 0;
  top: var(--image-alignment) !important;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

/* Previous moves to left (animation helper) */
.project.previous.moving-left {
  transform: translateX(calc(-50vw - 150px));
}

/* ============================================
   Animation States: Moving Out
   ============================================ */

.project.previous.moving-out {
  transform: translateX(calc(-50vw - 100px));
  opacity: 0;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.project.next.moving-out {
  transform: translateX(calc(50vw + 100px));
  opacity: 0;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

/* ============================================
   Utilities
   ============================================ */

/* Hide elements waiting to appear (must come after .project.next) */
.project.waiting-to-appear.next,
.project.next.waiting-to-appear,
.project.waiting-to-appear {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
  z-index: -1 !important;
}

/* ============================================
   Info Section
   ============================================ */

.info {
  font-size: clamp(11px, 0.9vw, 13px);
  color: rgb(0, 0, 0);
  line-height: 18px;
  font-weight: 400;
  padding: 20px;
  border: 1px solid transparent;
  text-align: left;
  max-width: calc(var(--card-width) * 0.95);
  margin: 0 auto;
  position: absolute;
  top: calc(10vh + 54px + 350px + 20px);
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: calc(var(--card-width) * 0.95);
}

.facts {
  font-size: clamp(10px, 0.8vw, 11px);
  color: rgb(0, 0, 0);
  line-height: 18px;
  font-weight: 300;
  padding: 20px;
  border: 1px solid transparent;
  text-align: left;
  max-width: calc(var(--card-width) * 0.95);
  margin: 0 auto;
  position: absolute;
  top: calc(10vh + 54px + 350px + 20px + 120px); /* Position below info with spacing */
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: calc(var(--card-width) * 0.95);
}

/* ============================================
   Navigation & UI Elements
   ============================================ */

html, body {
  background: #fff;
  font-family: 'Inter';
  z-index: 1;
  padding: 20px;
  margin: 0;
  overflow: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 400;
  line-height: 16px;
  cursor: default;
}

.intro {
  cursor: default;
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 200;
  top: 40px;
  right: 30px;
  transform-origin: top right;
  position: fixed;
  z-index: 1001;
  border: 0.5px solid black;
  padding: 2px 5px;
  transition: var(--transition);
  display: inline-block;
  box-sizing: border-box;
}

.intro:hover {
  background-color: #f5f5f5;
}

.intro p {
  margin: 0;
  line-height: 1;
}

.intro:hover .bread {
  display: block;
  opacity: 1;
}

.bread {
  display: none;
  top: 50px;
  right: 0px;
  width: 200px;
  font-size: clamp(11px, 0.9vw, 13px);
  line-height: 30px;
  font-weight: 300;
  background-color: white;
  position: absolute;
  text-align: middle;
  z-index: 1000;
  border: 0.5px solid black;
  padding: 15px;
}

.bread p {
  margin: 0 0 10px;
  line-height: 1.4;
}

.bread img {
  max-width: 100%;
  width: 250px;
  height: auto;
  display: block;
  margin-top: 10px;
  border: 0.5px solid black;
}

.back {
  cursor: pointer;
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 200;
  position: fixed;
  top: 40px;
  left: 30px;
  transform-origin: top left;
  border: 0.5px solid black;
  padding: 2px 5px;
  transition: var(--transition);
  display: inline-block;
  box-sizing: border-box;
}

.back:hover {
  background-color: #f5f5f5;
}

.back p {
  margin: 0;
  line-height: 1;
}

.selected works {
  font-size: clamp(18px, 1.8vw, 24px);
  text-align: center;
  cursor: default;
  position: absolute;
  top: 10px;
}

/* ============================================
   Media Queries
   ============================================ */

/* Intermediate screen sizes - keep same card size; only position changes */
@media screen and (max-width: 1200px) and (min-width: 769px) {
}

@media screen and (max-width: 768px) {
  .project {
    top: 8vh;
  }

  .project.next {
    top: calc(8vh + 20px + 16px + 16px + 14px);
    transform: translateX(calc(50vw - 100px));
    width: 250px !important;
    min-width: 250px !important;
    max-width: 250px !important;
  }

  .project.next img {
    width: 250px !important;
    min-width: 250px !important;
    max-width: 250px !important;
    height: 400px !important;
    object-fit: cover !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
  }

  .project.previous {
    top: calc(8vh + 20px + 16px + 16px + 14px + 1px);
    width: 250px !important;
    min-width: 250px !important;
    max-width: 250px !important;
  }
  
  .project.previous img {
    width: 250px !important;
    min-width: 250px !important;
    max-width: 250px !important;
    height: 400px !important;
    object-fit: cover !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
  }

  .project.visible.moving-to-previous {
    transform: translateX(calc(-50vw - 100px));
    width: 250px !important;
    min-width: 250px !important;
    max-width: 250px !important;
    top: calc(8vh + 20px + 16px + 16px + 14px);
  }

  .info {
    top: calc(8vh + 20px + 18px + 18px + 400px + 20px);
  }

  .facts {
    top: calc(8vh + 20px + 18px + 18px + 400px + 20px + 120px); /* Position below info with spacing on mobile */
  }

  .bread {
    top: 80px;
    right: 10px;
    width: 200px;
    z-index: 9999;
    background-color: white;
    padding: 10px;
    border: 1px solid #ccc;
  }

  .bread img {
    max-width: 100%;
    width: 200px;
    height: auto;
    display: block;
    margin-top: 10px;
    border: 0.5px solid black;
  }
}