/* ═══════════════════════════════════════════════
   CASE STUDY — case-study.css
   ═══════════════════════════════════════════════ */

/* ── Progress bar ── */
.cs-progress-bar {
  position:   fixed;
  top:        0;
  left:       0;
  height:     2px;
  width:      0%;
  background: linear-gradient(90deg, #950460, #EC304D);
  z-index:    9999;
  transition: width 0.1s linear;
}

/* ── Back link ── */
.cs-back {
  position:    fixed;
  top:         28px;
  left:        32px;
  z-index:     200;
  display:     flex;
  align-items: center;
  gap:         8px;
  font-family: var(--sans);
  font-size:   0.9rem;
  letter-spacing: 0.08em;
  color:       var(--text-soft);
  transition:  color 0.2s, gap 0.25s;
}
.cs-back:hover { color: var(--text); gap: 12px; }

/* ══════════════════════════════
   SCROLL NAV
══════════════════════════════ */
.cs-scroll-nav {
  position:       fixed;
  right:          32px;
  top:            50%;
  transform:      translateY(-50%);
  z-index:        100;
  display:        flex;
  flex-direction: column;
  align-items:    flex-end;
  gap:            0;
}

.cs-scroll-nav__item {
  display:     flex;
  align-items: center;
  gap:         10px;
  padding:     6px 0;
  cursor:      pointer;
  text-decoration: none;
  position:    relative;
}

.cs-scroll-nav__dot {
  width:         5px;
  height:        5px;
  border-radius: 50%;
  background:    rgba(255,255,255,0.2);
  flex-shrink:   0;
  transition:    background 0.3s, width 0.3s, height 0.3s, box-shadow 0.3s;
}

.cs-scroll-nav__label {
  font-family:    var(--sans);
  font-size:      0.6rem;
  letter-spacing: 0.1em;
  color:          var(--text-soft);
  white-space:    nowrap;
  opacity:        0;
  transform:      translateX(6px);
  transition:     opacity 0.2s, transform 0.2s, color 0.2s;
  order:          -1;
}

.cs-scroll-nav__item:hover .cs-scroll-nav__label {
  opacity:   0.7;
  transform: translateX(0);
}

.cs-scroll-nav__item.active .cs-scroll-nav__dot {
  background: var(--accent);
  width:      7px;
  height:     7px;
  box-shadow: 0 0 8px var(--accent);
}

.cs-scroll-nav__item.active .cs-scroll-nav__label {
  opacity:   1;
  transform: translateX(0);
  color:     var(--accent);
}

/* ══════════════════════════════
   HERO
══════════════════════════════ */
.cs-hero {
  min-height:      100vh;
  display:         flex;
  flex-direction:  column;
  justify-content: flex-end;
  padding:         140px 80px 80px;
  position:        relative;
  overflow:        hidden;
  border-bottom:   1px solid var(--border);
}

/* Subtle grid overlay */
.cs-hero::before {
  content:    '';
  position:   absolute;
  inset:      0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
  z-index:    0;
}

/* Vignette */
.cs-hero::after {
  content:  '';
  position: absolute;
  inset:    0;
  background: radial-gradient(ellipse at 70% 50%, transparent 30%, var(--bg) 80%);
  pointer-events: none;
  z-index:  0;
}

.cs-hero > * { position: relative; z-index: 1; }

.cs-hero__img {
  position:   absolute;
  right:      -2%;
  top:        0;
  width:      55%;
  height:     100%;
  object-fit: cover;
  object-position: left top;
  opacity:    0.12;
  pointer-events: none;
  z-index:    0;
}

.cs-hero__eyebrow {
  display:     flex;
  align-items: center;
  gap:         10px;
  margin-bottom: 20px;
}
.cs-hero__label {
  font-family:    var(--sans);
  font-size:      0.68rem;
  letter-spacing: 0.16em;
  color:          var(--accent);
}
.cs-hero__dot { color: var(--border2); font-size: 0.5rem; }

.cs-hero__title {
  font-family:    var(--serif);
  font-size:      clamp(4rem, 10vw, 9rem);
  font-weight:    400;
  letter-spacing: -0.04em;
  line-height:    0.92;
  color:          var(--text);
  margin-bottom:  28px;
}

.cs-hero__tagline {
  font-family:   var(--serif);
  font-style:    italic;
  font-size:     clamp(0.78rem, 1.4vw, 1rem);
  color:         var(--text-soft);
  max-width:     600px;
  line-height:   1.55;
  margin-bottom: 60px;
}

/* Stats row inside hero */
.cs-hero__stats-row {
  margin-bottom: 28px;
  max-width:     600px;
}
.cs-hero__stats-row .cs-stat        { padding-top: 12px; padding-bottom: 12px; }
.cs-hero__stats-row .cs-stat__num   { text-transform: lowercase; font-size: clamp(1.1rem, 2vw, 1.4rem); }
.cs-hero__stats-row .cs-stat__label { text-transform: lowercase; letter-spacing: 0.05em; }

.cs-meta {
  display:  flex;
  gap:      56px;
  flex-wrap: wrap;
}
.cs-meta__item {
  display:        flex;
  flex-direction: column;
  gap:            5px;
}
.cs-meta__label {
  font-family:    var(--sans);
  font-size:      0.6rem;
  letter-spacing: 0.16em;
  color:          rgba(255,255,255,0.55);
}
.cs-meta__value {
  font-family: var(--serif);
  font-size:   0.9rem;
  color:       #ffffff;
}

/* ══════════════════════════════
   SECTIONS
══════════════════════════════ */
.cs-section {
  padding:   88px 80px;
  max-width: 1200px;
  margin:    0 auto;
}
.cs-section--full { max-width: none; padding: 0; }
.cs-section--dark {
  background:    var(--bg2);
  border-top:    1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cs-section--dark .cs-section { padding: 32px 80px; }

.cs-section-label {
  display:        flex;
  align-items:    center;
  gap:            12px;
  font-family:    var(--sans);
  font-size:      0.62rem;
  letter-spacing: 0.2em;
  color:          var(--accent);
  margin-bottom:  28px;
}
.cs-section-label::after {
  content:    '';
  height:     1px;
  width:      80px;
  background: rgba(249,196,212,0.25);
}

.cs-section-title {
  font-family:    var(--serif);
  font-size:      clamp(1.7rem, 3vw, 2.6rem);
  font-weight:    400;
  letter-spacing: -0.02em;
  line-height:    1.15;
  margin-bottom:  20px;
  color:          var(--text);
}

.cs-body {
  font-family: var(--serif);
  font-size:   1rem;
  color:       var(--text-soft);
  line-height: 1.85;
  max-width:   660px;
}
.cs-body + .cs-body { margin-top: 14px; }

/* ── Columns ── */
.cs-cols {
  display:     grid;
  grid-template-columns: 1fr 1fr;
  gap:         64px;
  align-items: start;
}
.cs-cols--3 {
  grid-template-columns: repeat(3, 1fr);
  column-gap:  80px;
  row-gap:     100px;
  align-items: stretch;
}
.cs-cols--3 > .cs-card {
  margin-bottom: 0;
}

/* ── Callout ── */
.cs-callout {
  border-left:   2px solid var(--accent);
  padding:       22px 28px;
  background:    rgba(249, 196, 212, 0.04);
  border-radius: 0 12px 12px 0;
  margin:        36px 0;
}
.cs-callout p {
  font-family: var(--serif);
  font-style:  italic;
  font-size:   clamp(1rem, 1.8vw, 1.3rem);
  color:       var(--text);
  line-height: 1.65;
}

/* ── Stats ── */
.cs-stats {
  display:       flex;
  border:        1px solid var(--border);
  border-radius: 14px;
  overflow:      hidden;
}
.cs-stat {
  flex:        1;
  padding:     28px 22px;
  border-right: 1px solid var(--border);
  text-align:  center;
}
.cs-stat:last-child { border-right: none; }
.cs-stat__num {
  font-family:    var(--serif);
  font-size:      clamp(1.6rem, 3vw, 2.4rem);
  font-weight:    400;
  color:          var(--text);
  letter-spacing: -0.03em;
  display:        block;
  margin-bottom:  4px;
}
.cs-stat__label {
  font-size:      0.65rem;
  letter-spacing: 0.08em;
  color:          var(--text-soft);
}

/* ── Cards ── */
.cs-cards {
  display:    grid;
  grid-template-columns: repeat(2, 1fr);
  gap:        14px;
  margin-top: 36px;
}
.cs-card {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: 12px;
  padding:       32px 28px;
  transition:    border-color 0.25s, background 0.25s;
}
/* Ensure all cards in a cs-cards grid have uniform padding — no first-child override from external CSS */
.cs-cards .cs-card { padding: 32px 28px; }

.cs-card:hover {
  border-color: var(--border2);
  background:   var(--surface2);
}
.cs-card--bare {
  background: transparent;
  border:     none;
  padding:    0;
}
.cs-card--bare:hover {
  background: transparent;
  border:     none;
}
.cs-card__icon {
  font-size:     1.3rem;
  margin-bottom: 10px;
  display:       block;
  filter:        grayscale(1);
  transition:    transform 0.3s var(--ease);
}
.cs-card:hover .cs-card__icon {
  animation: iconFloat 4s ease-in-out infinite;
}
@keyframes iconFloat {
  0%, 100% { transform: translate(0, 0)    rotate(0deg); }
  30%       { transform: translate(2px, -4px) rotate(1deg); }
  60%       { transform: translate(-2px, -2px) rotate(-1deg); }
}
.cs-card__num {
  display:        block;
  font-family:    var(--serif);
  font-style:     italic;
  font-size:      2.2rem;
  font-weight:    400;
  letter-spacing: -0.04em;
  color:          var(--accent);
  margin-bottom:  16px;
  line-height:    1;
  background:     linear-gradient(135deg, #f9c4d4 0%, #950460 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: numPulse 3s ease-in-out infinite;
}
.cs-card--bare:nth-child(2) .cs-card__num { animation-delay: 0.4s; }
.cs-card--bare:nth-child(3) .cs-card__num { animation-delay: 0.8s; }

@keyframes numPulse {
  0%, 100% { opacity: 1;    transform: translateY(0); }
  50%       { opacity: 0.6; transform: translateY(-3px); }
}
.cs-card__title {
  font-family:   var(--sans);
  font-size:     0.78rem;
  font-weight:   500;
  letter-spacing: 0.03em;
  color:         var(--text);
  margin-bottom: 8px;
}
.cs-card__body {
  font-size:   0.8rem;
  color:       var(--text-soft);
  line-height: 1.65;
}

/* ── Image wrap ── */
.cs-img-wrap {
  width:         100%;
  border-radius: 14px;
  overflow:      hidden;
  border:        1px solid var(--border);
  background:    var(--surface);
  margin:        36px 0;
}
.cs-img-wrap img  { width: 100%; height: auto; display: block; object-fit: cover; }
.cs-img-wrap--video { aspect-ratio: 16/10; }
.cs-img-wrap--video video {
  position:   absolute;
  inset:      0;
  width:      100%;
  height:     100%;
  object-fit: cover;
}
.cs-img-wrap { position: relative; }
.cs-img-placeholder {
  width:           100%;
  aspect-ratio:    16/10;
  display:         flex;
  flex-direction:  column;
  align-items:     center;
  justify-content: center;
  gap:             12px;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 28px 28px;
  color:           var(--muted);
  font-size:       0.65rem;
  letter-spacing:  0.1em;
}
.cs-img-caption {
  padding:        10px 18px;
  font-size:      0.68rem;
  letter-spacing: 0.04em;
  color:          var(--text-soft);
  border-top:     1px solid var(--border);
}

/* ── Version badge ── */
.cs-version {
  display:        inline-flex;
  align-items:    center;
  gap:            8px;
  background:     var(--surface2);
  border:         1px solid var(--border2);
  border-radius:  100px;
  padding:        5px 14px;
  font-family:    var(--sans);
  font-size:      0.65rem;
  letter-spacing: 0.12em;
  color:          var(--text-soft);
  margin-bottom:  20px;
}
.cs-version__dot {
  width:         5px;
  height:        5px;
  border-radius: 50%;
  background:    var(--accent);
}

/* ── Parallax section ── */
.cs-section--parallax {
  position: relative;
  overflow: hidden;
}
.cs-parallax-bg {
  position:   absolute;
  top:        10%;
  left:       65%;
  transform:  translateX(-50%);
  width:      80%;
  max-width:  860px;
  height:     auto;
  opacity:    0.08;
  pointer-events: none;
  will-change: transform;
  filter:     blur(0.5px);
  transition: opacity 0.3s;
}

/* ── Objective statement ── */
.cs-objective-statement {
  position:        relative;
  padding:         32px 36px;
  background:      rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border-radius:   16px;
  border:          1px solid rgba(255, 255, 255, 0.1);
  box-shadow:      0 4px 32px rgba(0,0,0,0.3),
                   inset 0 1px 0 rgba(255,255,255,0.08);
  overflow:        hidden;
}
/* ── Objective icon animation ── */
.cs-obj-icon {
  display:     flex;
  align-items: center;
  gap:         10px;
  margin-bottom: 20px;
  color:       rgba(255,255,255,0.5);
}
.cs-obj-icon__bulb {
  animation: objBulbGlow 7s ease-in-out infinite;
  flex-shrink: 0;
  width: 28px; height: 28px;
}
.cs-obj-icon__arrow {
  animation: objArrowSlide 7s ease-in-out infinite;
  flex-shrink: 0;
  opacity: 0.35;
  width: 16px; height: 16px;
}
.cs-obj-icon__laptop {
  animation: objLaptopReveal 7s ease-in-out infinite;
  flex-shrink: 0;
  width: 28px; height: 28px;
}
@keyframes objBulbGlow {
  0%   { opacity: 0.6; color: rgba(255,255,255,0.5); filter: none; transform: scale(1); }
  35%  { opacity: 1;   color: rgba(255, 248, 180, 0.95); filter: drop-shadow(0 0 10px rgba(255,240,120,0.6)); transform: scale(1.08); }
  55%  { opacity: 0.2; color: rgba(255,255,255,0.3); filter: none; transform: scale(0.95); }
  100% { opacity: 0.6; color: rgba(255,255,255,0.5); filter: none; transform: scale(1); }
}
@keyframes objArrowSlide {
  0%, 40%  { opacity: 0; transform: translateX(-5px); }
  55%, 75% { opacity: 0.45; transform: translateX(0); }
  90%      { opacity: 0; transform: translateX(5px); }
  100%     { opacity: 0; transform: translateX(-5px); }
}
@keyframes objLaptopReveal {
  0%, 50%  { opacity: 0; transform: scale(0.88) translateY(4px); filter: none; }
  70%, 88% { opacity: 0.9; transform: scale(1) translateY(0); filter: drop-shadow(0 0 6px rgba(255,255,255,0.2)); }
  100%     { opacity: 0; transform: scale(0.88) translateY(4px); filter: none; }
}
.cs-objective-statement__text {
  font-family:    var(--sans);
  font-size:      0.95rem;
  font-weight:    400;
  line-height:    1.8;
  letter-spacing: 0.01em;
  color:          rgba(255, 255, 255, 0.85);
}

/* ── Roadmap ── */
.cs-roadmap {
  border:        1px solid var(--border);
  border-radius: 14px;
  overflow:      hidden;
  margin-top:    0;
}
.cs-roadmap__item {
  display:       flex;
  align-items:   flex-start;
  gap:           20px;
  padding:       18px 22px;
  border-bottom: 1px solid var(--border);
  transition:    background 0.2s;
}
.cs-roadmap__item:last-child { border-bottom: none; }
.cs-roadmap__item:hover      { background: var(--surface); }
.cs-roadmap__num {
  font-family:    var(--serif);
  font-style:     italic;
  font-size:      1rem;
  color:          var(--accent);
  min-width:      26px;
  padding-top:    2px;
}
.cs-roadmap__text {
  font-size:   0.86rem;
  color:       var(--text-soft);
  line-height: 1.6;
}

/* ── Divider ── */
.cs-divider {
  height:     1px;
  background: var(--border);
  margin:     0 80px;
}

/* ── Footer ── */
.cs-footer {
  padding:    88px 80px;
  text-align: center;
  border-top: 1px solid var(--border);
}
.cs-footer__label {
  font-size:      0.65rem;
  letter-spacing: 0.16em;
  color:          var(--text-soft);
  margin-bottom:  14px;
}
.cs-footer__next {
  font-family:    var(--serif);
  font-size:      clamp(2rem, 5vw, 4rem);
  font-weight:    400;
  letter-spacing: -0.025em;
  color:          var(--text);
  display:        inline-flex;
  align-items:    center;
  gap:            16px;
  transition:     gap 0.3s var(--ease), color 0.2s;
  text-decoration: none;
}
.cs-footer__next:hover { color: var(--accent); gap: 28px; }

/* ══════════════════════════════
   RESPONSIVE
══════════════════════════════ */
@media (max-width: 900px) {
  .cs-scroll-nav { display: none; }
  .cs-hero        { padding: 100px 28px 56px; }
  .cs-section     { padding: 64px 28px; }
  .cs-section--dark .cs-section { padding: 64px 28px; }
  .cs-cols        { grid-template-columns: 1fr; gap: 36px; }
  .cs-cols--3     { grid-template-columns: 1fr; }
  .cs-divider     { margin: 0 28px; }
  .cs-footer      { padding: 64px 28px; }
  .cs-meta        { gap: 28px; }
  .cs-cards       { grid-template-columns: 1fr !important; }
  .cs-stats       { flex-direction: column; }
  .cs-stat        { border-right: none; border-bottom: 1px solid var(--border); }
  .cs-stat:last-child { border-bottom: none; }
  .cs-back        { left: 16px; }
  .cs-hero__title { overflow-wrap: break-word; }
}

@media (max-width: 540px) {
  .cs-hero   { padding: 56px 20px 48px; }
  .cs-section { padding: 48px 20px; }
  .cs-section--dark .cs-section { padding: 48px 20px; }
  .cs-divider { margin: 0 20px; }
  .cs-footer  { padding: 48px 20px; }
  .cs-hero__title { letter-spacing: -0.02em; }
  .cs-meta    { gap: 20px; }
  .cs-callout { padding: 16px 20px; }
  .cs-back    { display: none; }
}