/* ==========================================================================
   BatTonya — UX/UI portfolio
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Bricolage+Grotesque:opsz,wght@12..96,500;12..96,600;12..96,700;12..96,800&display=swap');

:root{
  --bg:#0a0a0d;
  --bg-soft:#0d0d11;
  --surface:#141418;
  --surface-2:#191a1f;
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.18);
  --text:#f3f3f5;
  --text-muted:#9a99a3;
  --text-faint:#5f5e66;
  --accent:#ff5a34;
  --accent-2:#7c5cff;
  --accent-soft:rgba(255,90,52,.12);
  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --ease:cubic-bezier(.16,.8,.24,1);
  --maxw:1320px;
  --pad:clamp(20px,5vw,80px);
  --font-display:'Bricolage Grotesque',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{background:var(--bg);color:var(--text)}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  position:relative;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit}

::selection{background:var(--accent);color:#0a0a0d}

/* background texture: dot grid + soft blobs */
body::before{
  content:'';
  position:fixed;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:28px 28px;
  pointer-events:none;
  z-index:0;
  opacity:.5;
}

.blob{
  position:absolute;
  border-radius:50%;
  filter:blur(90px);
  pointer-events:none;
  z-index:0;
}

.container{
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
  position:relative;
  z-index:1;
}

/* ---------- typography ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.05;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--text-muted);
}
.eyebrow::before{
  content:'';
  width:7px;height:7px;
  border-radius:2px;
  background:var(--accent);
  transform:rotate(45deg);
  flex:none;
}

.lede{
  font-size:clamp(17px,1.7vw,20px);
  color:var(--text-muted);
  line-height:1.6;
  max-width:46ch;
}

.grad-text{
  background:linear-gradient(100deg,var(--text) 30%,var(--accent) 65%,var(--accent-2) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:15px 26px;
  border-radius:100px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.01em;
  white-space:nowrap;
  transition:transform .45s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
  will-change:transform;
}
.btn--primary{
  background:var(--text);
  color:#0a0a0d;
}
.btn--primary:hover{
  background:var(--accent);
  color:#fff;
  transform:translateY(-2px);
}
.btn--ghost{
  border:1px solid var(--border-strong);
  color:var(--text);
}
.btn--ghost:hover{
  border-color:var(--accent);
  background:var(--accent-soft);
  transform:translateY(-2px);
}
.btn svg{width:15px;height:15px;flex:none;transition:transform .35s var(--ease)}
.btn:hover svg{transform:translate(3px,-3px)}

/* ---------- nav ---------- */
.nav{
  position:fixed;
  top:0;left:0;right:0;
  z-index:50;
  padding:22px 0;
  transition:padding .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  padding:14px 0;
  background:rgba(10,10,13,.78);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--border);
}
.nav__row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  font-family:var(--font-display);
  font-weight:700;
  font-size:19px;
  letter-spacing:-.01em;
  display:flex;
  align-items:center;
  gap:10px;
}
.logo__mark{
  width:30px;height:30px;
  border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  color:#0a0a0d;
  flex:none;
}
.nav__links{
  display:flex;
  align-items:center;
  gap:36px;
}
.nav__links a{
  font-size:14px;
  font-weight:500;
  color:var(--text-muted);
  transition:color .25s var(--ease);
  position:relative;
}
.nav__links a:hover{color:var(--text)}
.nav__cta{display:flex;align-items:center;gap:18px}
.nav .btn--ghost{padding:11px 20px;font-size:13px}

.nav__backdrop{
  display:none;
}

.nav__burger{
  display:none;
  width:38px;height:38px;
  border-radius:9px;
  border:1px solid var(--border-strong);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.nav__burger span{width:15px;height:1.5px;background:var(--text);display:block}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:calc(90px + 6vw) 0 96px;
  overflow:hidden;
}
.hero__blob-a{width:560px;height:560px;background:var(--accent);opacity:.16;top:-160px;right:-120px}
.hero__blob-b{width:460px;height:460px;background:var(--accent-2);opacity:.14;bottom:-180px;left:-140px}

.hero__top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:40px;
  margin-bottom:28px;
}
.hero h1{
  font-size:clamp(40px,6.6vw,84px);
  max-width:16ch;
  margin-top:18px;
}
.hero__meta{
  text-align:right;
  padding-top:8px;
}
.hero__meta .num{
  font-family:var(--font-display);
  font-size:13px;
  color:var(--text-faint);
  letter-spacing:.08em;
}

.hero__bottom{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:40px;
  align-items:end;
  margin-top:44px;
}
.hero__actions{
  display:flex;
  align-items:center;
  gap:22px;
  flex-wrap:wrap;
}
.hero__scroll{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-muted);
}
.hero__scroll .dot{
  width:6px;height:6px;border-radius:50%;background:var(--accent);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}

.hero__tags{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.tag{
  font-size:12.5px;
  font-weight:500;
  color:var(--text-muted);
  border:1px solid var(--border);
  padding:7px 13px;
  border-radius:100px;
  white-space:nowrap;
}

/* ---------- section shell ---------- */
.section{
  position:relative;
  padding:120px 0;
}
.section--tight{padding:80px 0}
.section__head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:32px;
  margin-bottom:64px;
}
.section__head h2{
  font-size:clamp(30px,4vw,48px);
  margin-top:14px;
  max-width:20ch;
}
.section__head .lede{margin-left:auto;text-align:right}

.hr{
  height:1px;
  background:var(--border);
  border:0;
}

/* ---------- case cards (home) ---------- */
.cases{
  display:flex;
  flex-direction:column;
}
.case-card{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:56px;
  align-items:center;
  padding:64px 0;
  border-top:1px solid var(--border);
  text-decoration:none;
  color:inherit;
}
.cases .case-card:last-child{border-bottom:1px solid var(--border)}
.case-card__index{
  font-family:var(--font-display);
  font-size:15px;
  color:var(--text-faint);
  letter-spacing:.05em;
}
.case-card__media{
  position:relative;
  order:2;
  border-radius:var(--radius-m);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--surface);
  aspect-ratio:16/10.2;
}
.case-card__media img{
  width:100%;height:100%;object-fit:cover;object-position:top;
  transition:transform .7s var(--ease);
}
.case-card:hover .case-card__media img{transform:scale(1.045)}
.case-card__media::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(0,0,0,.35));
  opacity:0;
  transition:opacity .5s var(--ease);
}
.case-card:hover .case-card__media::after{opacity:1}

.case-card__body{order:1}
.case-card__tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.case-card__title{
  font-size:clamp(24px,2.6vw,34px);
  margin-bottom:18px;
  transition:color .3s var(--ease);
}
.case-card:hover .case-card__title{color:var(--accent)}
.case-card__problem{
  color:var(--text-muted);
  font-size:15px;
  line-height:1.65;
  margin-bottom:22px;
  max-width:46ch;
}
.case-card__result{
  display:flex;
  gap:12px;
  padding:16px 18px;
  border-radius:var(--radius-s);
  background:var(--surface);
  border:1px solid var(--border);
  border-left:2px solid var(--accent);
  margin-bottom:22px;
}
.case-card__result svg{flex:none;width:16px;height:16px;margin-top:3px;color:var(--accent)}
.case-card__result p{font-size:14.5px;color:var(--text);line-height:1.55}
.case-card__result b{color:var(--accent);font-weight:600}
.case-card__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
}
.case-card__link svg{width:14px;height:14px;transition:transform .35s var(--ease)}
.case-card:hover .case-card__link svg{transform:translate(4px,-4px)}

/* ---------- about ---------- */
.about{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:72px;
}
.about__mark{
  width:100%;
  aspect-ratio:1/1.05;
  border-radius:var(--radius-l);
  background:linear-gradient(155deg,var(--surface) 0%, var(--surface-2) 60%, #101014 100%);
  border:1px solid var(--border);
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
.about__mark::before{
  content:'';
  position:absolute;
  width:220%;height:220%;
  background:conic-gradient(from 180deg, transparent 0deg, var(--accent-soft) 90deg, transparent 180deg, rgba(124,92,255,.14) 270deg, transparent 360deg);
  animation:spin 16s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.about__mark span{
  position:relative;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(90px,10vw,140px);
  color:var(--text);
  letter-spacing:-.03em;
}
.about__body p{
  color:var(--text-muted);
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.7;
  margin-bottom:22px;
  max-width:56ch;
}
.about__body p strong{color:var(--text);font-weight:600}
.principles{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:36px;
}
.principle{
  padding:12px 18px;
  border:1px solid var(--border);
  border-radius:100px;
  font-size:13.5px;
  color:var(--text-muted);
  display:flex;
  align-items:center;
  gap:9px;
}
.principle::before{
  content:'';
  width:6px;height:6px;border-radius:50%;
  background:var(--accent-2);
  flex:none;
}

/* ---------- footer / contact ---------- */
.footer-cta{
  position:relative;
  padding:110px 0;
  text-align:center;
  overflow:hidden;
}
.footer-cta__blob{width:620px;height:620px;background:var(--accent-2);opacity:.16;left:50%;top:50%;transform:translate(-50%,-50%)}
.footer-cta h2{
  font-size:clamp(34px,6vw,72px);
  max-width:18ch;
  margin:18px auto 40px;
}
.footer-cta .eyebrow{justify-content:center}

.site-footer{
  border-top:1px solid var(--border);
  padding:34px 0;
}
.site-footer__row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:var(--text-faint);
}
.site-footer__row a{color:var(--text-muted);transition:color .25s}
.site-footer__row a:hover{color:var(--text)}
.site-footer__links{display:flex;gap:24px;flex-wrap:wrap}

/* ---------- reveal animation ---------- */
.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.reveal-stagger > *{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal-stagger.is-visible > *{opacity:1;transform:translateY(0)}
.reveal-stagger.is-visible > *:nth-child(1){transition-delay:.03s}
.reveal-stagger.is-visible > *:nth-child(2){transition-delay:.11s}
.reveal-stagger.is-visible > *:nth-child(3){transition-delay:.19s}
.reveal-stagger.is-visible > *:nth-child(4){transition-delay:.27s}

/* =====================================================================
   Case detail page
   ===================================================================== */
.case-hero{
  padding:calc(84px + 6vw) 0 60px;
  position:relative;
  overflow:hidden;
}
.case-back{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  font-weight:500;
  color:var(--text-muted);
  margin-bottom:40px;
  transition:color .25s, gap .25s;
}
.case-back svg{width:14px;height:14px}
.case-back:hover{color:var(--text);gap:12px}

.case-hero__index{
  font-family:var(--font-display);
  font-size:clamp(110px,16vw,220px);
  line-height:.75;
  color:transparent;
  -webkit-text-stroke:1px var(--border-strong);
  font-weight:700;
  position:absolute;
  right:var(--pad);
  top:60px;
  z-index:0;
  user-select:none;
}
.case-hero__content{position:relative;z-index:1;max-width:900px}
.case-hero h1{
  font-size:clamp(32px,5vw,58px);
  margin:20px 0 22px;
}
.case-hero .lede{max-width:60ch;font-size:clamp(16px,1.6vw,19px)}

.case-meta{
  display:flex;
  gap:36px;
  flex-wrap:wrap;
  margin-top:44px;
  padding-top:32px;
  border-top:1px solid var(--border);
}
.case-meta div{display:flex;flex-direction:column;gap:6px}
.case-meta span{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint)}
.case-meta strong{font-size:15px;font-weight:500;color:var(--text)}
.case-meta a{color:var(--text);border-bottom:1px solid var(--border-strong)}
.case-meta a:hover{color:var(--accent);border-color:var(--accent)}

.case-media{
  border-radius:var(--radius-m);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--surface);
}
.case-media img{width:100%;height:auto}
.case-media--frame{padding:0}

.case-block{
  display:grid;
  grid-template-columns:.62fr 1.38fr;
  gap:64px;
  padding:64px 0;
  border-top:1px solid var(--border);
}
.case-block__label{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:10px;
}
.case-block__label .n{
  font-family:var(--font-display);
  font-size:13px;
  color:var(--accent);
}
.case-block h3{font-size:clamp(22px,2.4vw,30px);margin-top:10px}
.case-block__text p{
  color:var(--text-muted);
  font-size:16.5px;
  line-height:1.7;
  margin-bottom:18px;
  max-width:58ch;
}
.case-block__text ul{margin:20px 0 0;display:flex;flex-direction:column;gap:12px}
.case-block__text li{
  color:var(--text);
  font-size:15.5px;
  padding-left:22px;
  position:relative;
  max-width:56ch;
}
.case-block__text li::before{
  content:'';
  position:absolute;left:0;top:9px;
  width:8px;height:1.5px;
  background:var(--accent);
}

.approach{
  margin-top:26px;
  padding:22px 24px;
  border-radius:var(--radius-s);
  background:var(--surface);
  border:1px solid var(--border);
  border-left:2px solid var(--accent-2);
}
.approach p{color:var(--text-muted);font-size:14.5px;line-height:1.6;max-width:60ch;margin:0}
.approach b{color:var(--text);font-weight:600}

/* result panel */
.result-panel{
  margin:0;
  padding:72px var(--pad);
  border-radius:var(--radius-l);
  background:linear-gradient(155deg,var(--surface) 0%,var(--surface-2) 100%);
  border:1px solid var(--border);
  position:relative;
  overflow:hidden;
}
.result-panel__blob{width:420px;height:420px;background:var(--accent);opacity:.14;top:-140px;right:-100px}
.result-panel__head{max-width:760px;position:relative;z-index:1}
.result-panel__head h3{font-size:clamp(26px,3vw,38px);margin-top:14px}
.result-panel__head p{color:var(--text-muted);font-size:clamp(15px,1.4vw,18px);line-height:1.7;margin-top:18px;max-width:62ch}
.result-panel__head p strong{color:var(--text)}

.flow-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  align-items:start;
  gap:20px;
  margin-top:52px;
  position:relative;
  z-index:1;
}
.flow-grid img{
  border-radius:var(--radius-s);
  border:1px solid var(--border);
  width:100%;
}
.flow-grid figure:first-child{grid-row:span 2}
.flow-grid figcaption{
  font-size:12.5px;
  color:var(--text-faint);
  margin-top:10px;
}

.before-after{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-top:52px;
  position:relative;
  z-index:1;
}
.ba-card{
  border-radius:var(--radius-m);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--bg-soft);
}
.ba-card__label{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 18px;
  border-bottom:1px solid var(--border);
}
.ba-card__label span{font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-faint)}
.ba-card--after .ba-card__label span{color:var(--accent)}
.ba-card img{width:100%;display:block}

.case-nav{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:48px 0;
  border-top:1px solid var(--border);
  gap:20px;
}
.case-nav a{
  font-size:14px;
  font-weight:600;
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text-muted);
  transition:color .25s;
}
.case-nav a:hover{color:var(--text)}
.case-nav svg{width:14px;height:14px}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .case-hero__index{display:none}
  .about{grid-template-columns:1fr;gap:44px}
  .about__mark{max-width:280px;margin:0 auto;aspect-ratio:1/1}
  .case-block{grid-template-columns:1fr;gap:24px}
  .hero__bottom{grid-template-columns:1fr;gap:28px}
  .hero__tags{justify-content:flex-start}
}

@media (max-width:860px){
  .nav__backdrop{
    display:block;
    position:fixed;
    inset:0;
    background:rgba(6,6,8,.6);
    backdrop-filter:blur(3px);
    opacity:0;
    pointer-events:none;
    transition:opacity .4s var(--ease);
    z-index:55;
  }
  .nav__backdrop.is-open{opacity:1;pointer-events:auto}
  .nav__links{
    position:fixed;
    top:0;right:0;bottom:0;
    width:min(320px,80vw);
    background:var(--bg-soft);
    border-left:1px solid var(--border);
    flex-direction:column;
    align-items:flex-start;
    justify-content:center;
    gap:28px;
    padding:0 40px;
    transform:translateX(100%);
    transition:transform .45s var(--ease);
    z-index:60;
  }
  .nav__links.is-open{transform:translateX(0)}
  .nav__links a{font-size:20px}
  .nav__burger{display:flex}
  .nav .nav__cta .btn--ghost{display:none}

  .case-card{grid-template-columns:1fr;gap:26px;padding:48px 0}
  .case-card__media{order:1}
  .case-card__body{order:2}

  .section{padding:80px 0}
  .section__head{flex-direction:column;align-items:flex-start;gap:16px}
  .section__head .lede{margin-left:0;text-align:left}

  .flow-grid{grid-template-columns:1fr 1fr}
  .flow-grid figure:first-child{grid-row:auto}
  .before-after{grid-template-columns:1fr}

  .case-meta{gap:22px 32px}
  .result-panel{padding:44px 24px}
}

@media (max-width:560px){
  .hero__top{flex-direction:column;gap:14px}
  .hero__meta{display:none}
  .flow-grid{grid-template-columns:1fr}
  .case-hero__index{display:none}
  .footer-cta{padding:80px 0}
  .site-footer__row{flex-direction:column;align-items:flex-start;gap:14px}
}