/* ============================================================
   AUTO SERVIS — CASE STUDY
   Direction: Industrial automotive. Steel. Trust. Precision.
   Palette: Deep navy · Steel gray · White · Red accent
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,700;1,800&family=Barlow+Condensed:wght@500;600;700;800;900&display=swap');

/* ── Tokens ── */
:root {
  --navy:        #0d1b2a;
  --navy-mid:    #14263a;
  --navy-light:  #1c3250;
  --steel:       #2a3f55;
  --steel-light: #3d5670;
  --slate:       #8fa3b8;
  --slate-light: #b8c9d9;

  --white:       #f4f7fa;
  --white-dim:   rgba(244,247,250,0.75);
  --white-ghost: rgba(244,247,250,0.08);

  --red:         #c0392b;
  --red-bright:  #e74c3c;
  --red-glow:    rgba(192,57,43,0.25);

  --stroke:      rgba(255,255,255,0.08);
  --stroke-hi:   rgba(255,255,255,0.15);

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Barlow', sans-serif;

  --ease-out:  cubic-bezier(0.25,0.46,0.45,0.94);
  --ease-expo: cubic-bezier(0.16,1,0.3,1);

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;

  --container-pad: clamp(20px,5vw,80px);
  --section-y: clamp(72px,10vw,120px);
}

/* ── Reset ── */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { font-size:16px; background:var(--navy); overflow-x:hidden; scroll-behavior:smooth; }
body {
  font-family: var(--font-body);
  color: var(--white);
  background: var(--navy);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display:block; max-width:100%; }
a { color:inherit; text-decoration:none; }
button { font-family:inherit; border:none; cursor:pointer; }

/* ── Subtle texture overlay ── */
body::after {
  content:'';
  position:fixed; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity:1; pointer-events:none; z-index:9999;
  mix-blend-mode:overlay;
}

/* ── Scroll progress ── */
#progress {
  position:fixed; top:0; left:0;
  height:3px; width:0%;
  background:var(--red);
  z-index:10001;
  transition:width .1s linear;
}

/* ── Container ── */
.container {
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 var(--container-pad);
}
.container--wide { max-width:1400px; }
.container--narrow { max-width:900px; }

/* ============================================================
   NAV
   ============================================================ */
.site-nav {
  position:fixed; top:0; left:0; right:0;
  z-index:1000; height:68px;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 var(--container-pad);
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease-out), border-color .4s;
}
.site-nav.scrolled {
  background:rgba(13,27,42,.95);
  backdrop-filter:blur(20px);
  border-color:var(--stroke);
}
.nav-logo {
  font-family:var(--font-display);
  font-weight:800; font-size:1.1rem;
  letter-spacing:.08em; text-transform:uppercase;
  color:var(--white);
}
.nav-logo span { color:var(--red); }
.nav-back {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-body);
  font-size:.8rem; font-weight:600;
  letter-spacing:.06em; text-transform:uppercase;
  color:var(--slate);
  border:1px solid var(--stroke-hi);
  padding:8px 18px; border-radius:var(--r-sm);
  transition:all .2s var(--ease-out);
}
.nav-back svg { transition:transform .2s var(--ease-expo); }
.nav-back:hover {
  color:var(--white);
  border-color:rgba(255,255,255,.3);
  background:var(--white-ghost);
}
.nav-back:hover svg { transform:translateX(-3px); }

/* ============================================================
   HERO
   Full-bleed industrial
   ============================================================ */
.case-hero {
  position:relative;
  min-height:100svh;
  display:flex; align-items:flex-end;
  padding:0 0 clamp(48px,8vw,96px);
  overflow:hidden;
  background:#080f17;
}

/* Diagonal grid overlay */
.hero-grid-bg {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:linear-gradient(to bottom, transparent 0%, black 30%, black 70%, transparent 100%);
  -webkit-mask-image:linear-gradient(to bottom, transparent 0%, black 30%, black 70%, transparent 100%);
}

/* Red accent bar — left edge */
.hero-accent-bar {
  position:absolute; left:0; top:0; bottom:0;
  width:4px;
  background:linear-gradient(to bottom, transparent, var(--red) 30%, var(--red) 70%, transparent);
}

/* Diagonal slash decoration */
.hero-slash {
  position:absolute; right:-5%; top:-10%;
  width:55%; height:120%;
  background:linear-gradient(135deg, var(--navy-mid) 0%, var(--navy-light) 100%);
  clip-path:polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
  border-left:1px solid var(--stroke-hi);
}

/* Glow */
.hero-glow {
  position:absolute; top:20%; right:15%;
  width:500px; height:400px;
  background:radial-gradient(ellipse, rgba(192,57,43,.12) 0%, transparent 65%);
  pointer-events:none;
}

.hero-inner {
  position:relative; z-index:2;
  width:100%;
  padding:0 var(--container-pad);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(40px,6vw,80px);
  align-items:flex-end;
}

/* Left: text */
.hero-text { display:flex; flex-direction:column; }

.hero-eyebrow {
  display:inline-flex; align-items:center; gap:12px;
  margin-bottom:clamp(16px,2.5vw,28px);
  opacity:0; transform:translateX(-20px);
}
.eyebrow-line {
  width:36px; height:2px;
  background:var(--red);
}
.eyebrow-text {
  font-family:var(--font-display);
  font-size:.8rem; font-weight:700;
  letter-spacing:.22em; text-transform:uppercase;
  color:var(--red);
}

.case-title {
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(3.5rem,8vw,8rem);
  line-height:.88;
  letter-spacing:-.01em;
  text-transform:uppercase;
  color:var(--white);
  margin-bottom:clamp(20px,3vw,36px);
  opacity:0; transform:translateX(-30px);
}
.case-title .t-red { color:var(--red); display:block; }
.case-title .t-outline {
  color:transparent;
  -webkit-text-stroke:2px rgba(244,247,250,.25);
  display:block;
}

.hero-desc {
  font-size:clamp(.95rem,1.5vw,1.05rem);
  color:var(--slate-light);
  line-height:1.75; font-weight:400;
  max-width:480px;
  margin-bottom:clamp(28px,4vw,44px);
  opacity:0; transform:translateX(-20px);
}

.hero-cta {
  display:flex; align-items:center; gap:16px;
  flex-wrap:wrap;
  opacity:0; transform:translateY(12px);
}

/* ── Buttons ── */
.btn {
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-display);
  font-weight:700; font-size:1rem;
  letter-spacing:.1em; text-transform:uppercase;
  border-radius:var(--r-sm);
  padding:14px 28px; line-height:1;
  transition:all .22s var(--ease-out);
  position:relative; overflow:hidden;
}
.btn::after {
  content:'';
  position:absolute; inset:0;
  background:rgba(255,255,255,.08);
  transform:translateX(-101%);
  transition:transform .4s var(--ease-expo);
}
.btn:hover::after { transform:translateX(0); }

.btn--primary {
  background:var(--red); color:var(--white);
  border:2px solid var(--red);
}
.btn--primary:hover {
  background:var(--red-bright);
  border-color:var(--red-bright);
  transform:translateY(-2px);
  box-shadow:0 8px 28px var(--red-glow);
}
.btn--outline {
  background:transparent; color:var(--white);
  border:2px solid var(--stroke-hi);
}
.btn--outline:hover {
  border-color:rgba(255,255,255,.4);
  background:var(--white-ghost);
  transform:translateY(-2px);
}
.btn-arrow { transition:transform .2s var(--ease-expo); }
.btn:hover .btn-arrow { transform:translateX(4px); }

/* Right: stat panel */
.hero-panel {
  background:rgba(20,38,58,.7);
  border:1px solid var(--stroke-hi);
  border-radius:var(--r-lg);
  padding:clamp(24px,3.5vw,44px);
  backdrop-filter:blur(12px);
  opacity:0; transform:translateY(24px);
  position:relative; overflow:hidden;
}
.hero-panel::before {
  content:'';
  position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg, var(--red), transparent);
}
.panel-label {
  font-family:var(--font-display);
  font-size:.72rem; font-weight:700;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--slate); margin-bottom:24px;
}

.panel-stats {
  display:grid; grid-template-columns:1fr 1fr;
  gap:20px; margin-bottom:28px;
}
.pstat {
  padding:16px 20px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--stroke);
  border-radius:var(--r-md);
  transition:border-color .2s, background .2s;
}
.pstat:hover {
  border-color:rgba(192,57,43,.4);
  background:rgba(192,57,43,.06);
}
.pstat-val {
  font-family:var(--font-display);
  font-size:2rem; font-weight:900;
  color:var(--red); line-height:1;
  margin-bottom:4px;
}
.pstat-lbl {
  font-size:.72rem; color:var(--slate);
  font-weight:500; line-height:1.4;
}

.panel-services {
  display:flex; flex-direction:column; gap:8px;
}
.psvc {
  display:flex; align-items:center; gap:10px;
  font-size:.85rem; color:var(--slate-light); font-weight:400;
  padding:8px 0;
  border-bottom:1px solid var(--stroke);
}
.psvc:last-child { border-bottom:none; }
.psvc-dot {
  width:6px; height:6px; border-radius:50%;
  background:var(--red); flex-shrink:0;
}

/* ============================================================
   SECTION HEADER
   ============================================================ */
.section-header {
  margin-bottom:clamp(40px,6vw,72px);
}
.section-label {
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-display);
  font-size:.72rem; font-weight:700;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--red); margin-bottom:14px;
}
.section-label::before {
  content:''; width:20px; height:2px;
  background:var(--red);
}
.section-title {
  font-family:var(--font-display);
  font-size:clamp(2rem,4.5vw,4rem);
  font-weight:900; text-transform:uppercase;
  line-height:.95; letter-spacing:-.01em;
  color:var(--white);
}
.section-title em {
  font-style:italic; color:var(--red);
  font-weight:900;
}
.section-sub {
  font-size:clamp(.9rem,1.4vw,1rem);
  color:var(--slate-light); line-height:1.75;
  font-weight:400; max-width:500px;
  margin-top:16px;
}

/* ============================================================
   CASE SPLIT — Horizontal (image left, text right)
   NO sticky. Clean two-col layout per step.
   ============================================================ */
.case-split {
  padding:var(--section-y) 0;
  border-top:1px solid var(--stroke);
}

.case-split .container {
  display:flex; flex-direction:column; gap:clamp(64px,8vw,100px);
}

.split-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(40px,6vw,80px);
  align-items:center;
  opacity:0; transform:translateY(32px);
  transition:opacity .8s var(--ease-expo), transform .9s var(--ease-expo);
}
.split-block.is-visible { opacity:1; transform:none; }

/* Alternate: odd blocks have image right */
.split-block:nth-child(even) .split-img { order:2; }
.split-block:nth-child(even) .split-text { order:1; }

/* Image */
.split-img {
  position:relative; border-radius:var(--r-lg);
  overflow:hidden;
  aspect-ratio:4/3;
  border:1px solid var(--stroke-hi);
  background:var(--navy-mid);
}
.split-img img {
  width:100%; height:100%;
  object-fit:cover;
  transition:transform .8s var(--ease-out);
  filter:brightness(.85) contrast(1.05) saturate(.9);
}
.split-block:hover .split-img img { transform:scale(1.04); }

/* Red corner accent */
.split-img::before {
  content:'';
  position:absolute; top:0; left:0;
  width:40px; height:40px;
  border-top:3px solid var(--red);
  border-left:3px solid var(--red);
  border-radius:var(--r-lg) 0 0 0;
  z-index:2;
}
.split-img::after {
  content:'';
  position:absolute; bottom:0; right:0;
  width:40px; height:40px;
  border-bottom:3px solid rgba(192,57,43,.4);
  border-right:3px solid rgba(192,57,43,.4);
  z-index:2;
}

/* Step number watermark */
.split-step-num {
  position:absolute; bottom:-10px; left:16px;
  font-family:var(--font-display);
  font-size:7rem; font-weight:900;
  color:rgba(255,255,255,.04);
  line-height:1; user-select:none;
  letter-spacing:-.04em;
}

/* Text */
.split-text { display:flex; flex-direction:column; gap:20px; }

.case-label {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-display);
  font-size:.7rem; font-weight:700;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--slate);
}
.case-label::before {
  content:''; width:16px; height:2px; background:var(--slate);
}
.case-label.solution { color:var(--red); }
.case-label.solution::before { background:var(--red); }
.case-label.result { color:#3aaa6f; }
.case-label.result::before { background:#3aaa6f; }

.split-text h2 {
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3vw,2.6rem);
  font-weight:800; text-transform:uppercase;
  line-height:1; color:var(--white);
  letter-spacing:-.01em;
}

.case-desc {
  font-size:clamp(.88rem,1.3vw,.97rem);
  color:var(--slate-light); line-height:1.78;
  font-weight:400;
}
.case-desc strong { color:var(--white); font-weight:600; }

.case-list-pro {
  list-style:none;
  display:flex; flex-direction:column; gap:10px;
  margin:4px 0;
}
.case-list-pro li {
  display:flex; align-items:flex-start; gap:12px;
  font-size:.9rem; color:var(--slate-light);
  line-height:1.55;
}
.case-list-pro li::before {
  content:'';
  flex-shrink:0;
  margin-top:4px;
  width:16px; height:16px;
  border-radius:var(--r-sm);
  background:rgba(192,57,43,.15);
  border:1px solid rgba(192,57,43,.4);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2 5.5l2 2L8 3' stroke='%23c0392b' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:center;
}

/* Mobile images inside split blocks (desktop: hidden) */
.mobile-img { display:none; }

/* ============================================================
   VIDEO SECTION
   ============================================================ */
.case-process-video {
  position:relative;
  height:clamp(360px,55vw,640px);
  overflow:hidden;
  border-top:1px solid var(--stroke);
  border-bottom:1px solid var(--stroke);
}
.process-video {
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  opacity:.3;
  filter:grayscale(.4) contrast(1.1);
  transform:scale(1.08);
  transition:transform 10s ease-out, opacity .6s;
}
.case-process-video.in-view .process-video {
  transform:scale(1);
  opacity:.35;
}
.video-dark {
  position:absolute; inset:0;
  background:
    linear-gradient(to bottom, var(--navy) 0%, transparent 25%, transparent 75%, var(--navy) 100%),
    linear-gradient(to right, rgba(13,27,42,.8) 0%, transparent 50%);
}
.video-text {
  position:absolute; inset:0;
  display:flex; flex-direction:column; justify-content:center;
  padding:0 var(--container-pad);
  z-index:2;
  opacity:0; transform:translateY(20px);
  transition:opacity .9s var(--ease-expo), transform 1s var(--ease-expo);
}
.video-text.is-visible { opacity:1; transform:none; }
.video-text h2 {
  font-family:var(--font-display);
  font-size:clamp(2rem,5.5vw,5.5rem);
  font-weight:900; text-transform:uppercase;
  line-height:.9; letter-spacing:-.01em;
  color:var(--white); max-width:700px;
  margin-bottom:16px;
}
.video-text h2 em { font-style:italic; color:var(--red); }
.video-text p {
  font-size:clamp(.9rem,1.5vw,1.05rem);
  color:var(--slate-light); max-width:480px;
  line-height:1.7;
}

/* ============================================================
   STATS SECTION
   ============================================================ */
.case-stats {
  padding:var(--section-y) 0;
  border-top:1px solid var(--stroke);
  background:var(--navy-mid);
  position:relative;
}
/* Diagonal accent */
.case-stats::before {
  content:'';
  position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg, var(--red) 0%, transparent 60%);
}

.stats-header {
  margin-bottom:clamp(40px,6vw,64px);
  display:flex; justify-content:space-between;
  align-items:flex-end; flex-wrap:wrap; gap:24px;
}

.stats-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:2px;
  background:var(--stroke);
  border:2px solid var(--stroke-hi);
  border-radius:var(--r-lg);
  overflow:hidden;
}

.stat {
  padding:clamp(32px,5vw,56px) clamp(24px,4vw,44px);
  background:var(--navy-mid);
  position:relative; overflow:hidden;
  transition:background .3s;
  opacity:0; transform:translateY(20px);
  transition:opacity .7s var(--ease-expo), transform .8s var(--ease-expo), background .3s;
}
.stat:hover { background:var(--navy-light); }

/* Hover red flash top */
.stat::before {
  content:'';
  position:absolute; top:0; left:0; right:0; height:3px;
  background:var(--red);
  transform:scaleX(0); transform-origin:left;
  transition:transform .4s var(--ease-expo);
}
.stat:hover::before { transform:scaleX(1); }

/* Big number watermark */
.stat-bg-num {
  position:absolute; bottom:-20px; right:-10px;
  font-family:var(--font-display);
  font-size:8rem; font-weight:900;
  color:rgba(255,255,255,.025);
  line-height:1; user-select:none;
  letter-spacing:-.04em;
}

.stat-number {
  display:block;
  font-family:var(--font-display);
  font-size:clamp(3rem,6vw,5rem);
  font-weight:900; color:var(--red);
  line-height:1; letter-spacing:-.02em;
  margin-bottom:10px;
}
.stat p {
  font-size:clamp(.8rem,1.2vw,.9rem);
  color:var(--slate); line-height:1.5;
  font-weight:500; text-transform:uppercase;
  letter-spacing:.04em;
}

/* ============================================================
   BACK LINK
   ============================================================ */
.case-content {
  padding:clamp(48px,6vw,80px) var(--container-pad);
  border-top:1px solid var(--stroke);
  display:flex; align-items:center; justify-content:center;
}
.back-link {
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--font-display);
  font-size:.85rem; font-weight:700;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--slate);
  border:2px solid var(--stroke-hi);
  padding:12px 28px; border-radius:var(--r-sm);
  transition:all .25s var(--ease-out);
}
.back-link:hover {
  color:var(--white);
  border-color:rgba(255,255,255,.35);
  background:var(--white-ghost);
  transform:translateY(-2px);
}
.back-link::before { content:'←'; transition:transform .2s var(--ease-expo); }
.back-link:hover::before { transform:translateX(-4px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:960px) {
  .hero-inner { grid-template-columns:1fr; }
  .hero-panel { display:none; }
  .case-title { font-size:clamp(3rem,12vw,6rem); }
  .split-block {
    grid-template-columns:1fr;
    gap:clamp(24px,4vw,40px);
  }
  .split-block:nth-child(even) .split-img,
  .split-block:nth-child(even) .split-text { order:unset; }
  .split-img { aspect-ratio:16/9; }
}

@media(max-width:640px) {
  .stats-grid { grid-template-columns:1fr; }
  .stat { border-bottom:1px solid var(--stroke); }
  .stats-header { flex-direction:column; align-items:flex-start; }
  .hero-cta { flex-direction:column; align-items:flex-start; }
  .case-title { font-size:clamp(2.6rem,14vw,5rem); }
}