/* Case page — pro studio template (matches index) */
:root{
  --bg: #FFFFFF;
  --bg-2: #FAFAFA;
  --bg-3: #F5F5F5;
  --ink: #0A0A0A;
  --ink-2: #262626;
  --ink-3: #525252;
  --ink-4: #A3A3A3;
  --line: #E5E5E5;
  --line-2: #D4D4D4;
  --accent: #0A0A0A;
  --accent-hi: #FF3B00;

  --sans: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --display: 'Inter', 'Pretendard', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --pad: clamp(20px, 4vw, 56px);
  --max: 1440px;
  --ease: cubic-bezier(.4,0,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{
  background: var(--bg); color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.55; overflow-x: hidden;
  font-weight: 400;
}
body{font-size: 15px; font-feature-settings: "ss03","cv11","tnum"}
img{display: block; max-width: 100%; height: auto}
a{color: inherit; text-decoration: none}
::selection{background: var(--ink); color: var(--bg)}

/* Nav */
.nav{
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 20px var(--pad);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), padding .3s var(--ease);
}
.nav.scrolled{padding: 14px var(--pad); border-bottom-color: var(--line)}
.nav-logo{display: inline-flex; align-items: center; gap: 10px}
.nav-logo img{width: 22px; height: 22px}
.nav-logo-text{
  font-family: var(--display); font-weight: 600;
  font-size: 15px; letter-spacing: -.02em; color: var(--ink);
}
.nav-back{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line-2);
  border-radius: 100px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  color: var(--ink-2);
  letter-spacing: -.005em;
  transition: all .25s var(--ease);
}
.nav-back:hover{background: var(--ink); color: var(--bg); border-color: var(--ink)}
.nav-back .arr{font-size: 15px}

/* Kakao FAB */
.kfab{
  position: fixed; bottom: 24px; right: 24px; z-index: 80;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px 12px 16px;
  background: #FEE500; color: #191600;
  border-radius: 100px;
  font-family: var(--sans); font-size: 13px; font-weight: 600;
  letter-spacing: -.005em;
  box-shadow: 0 8px 24px -8px rgba(0,0,0,.15);
  transition: transform .3s var(--ease);
}
.kfab:hover{transform: translateY(-2px)}
.kfab svg{width: 18px; height: 18px; fill: #191600}

/* Hero */
.case-hero{
  padding: 120px var(--pad) 56px;
  max-width: var(--max); margin: 0 auto;
  border-bottom: 1px solid var(--line);
}
.case-num{
  font-family: var(--mono); font-size: 11px;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 500;
  margin-bottom: 32px;
  display: inline-flex; align-items: center; gap: 12px;
}
.case-num::before{content:''; width: 24px; height: 1px; background: var(--ink)}
.case-num .accent{color: var(--case-accent, var(--ink))}
.case-title{
  font-family: var(--display); font-weight: 500;
  font-size: clamp(40px, 5.6vw, 84px);
  line-height: 1.02; letter-spacing: -.03em;
  color: var(--ink); margin-bottom: 32px;
}
.case-title .italic{
  font-style: italic; font-weight: 400;
  color: var(--ink-3);
}
.case-sub{
  font-family: var(--sans);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 62ch;
  letter-spacing: -.005em;
  margin-bottom: 48px;
}
.case-sub strong{color: var(--ink); font-weight: 600}

.case-meta{
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}
.case-meta .cell{
  padding: 20px 24px 20px 0;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 6px;
}
.case-meta .cell:last-child{border-right: none}
.case-meta .k{
  font-family: var(--mono); font-size: 10px;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-4); font-weight: 500;
}
.case-meta .v{
  font-family: var(--sans); font-weight: 500;
  font-size: 14px; letter-spacing: -.005em;
  color: var(--ink); line-height: 1.45;
}
@media(max-width: 820px){
  .case-meta{grid-template-columns: 1fr 1fr}
  .case-meta .cell:nth-child(2){border-right: none}
  .case-meta .cell:nth-child(1),
  .case-meta .cell:nth-child(2){border-bottom: 1px solid var(--line)}
}

/* Images */
.case-image{
  margin: 56px auto 0;
  max-width: var(--max);
  padding: 0 var(--pad);
}
.case-image img{width: 100%; height: auto; display: block}
.case-image.wide{padding: 0; max-width: 100%}

.case-split{
  margin: 20px auto 0;
  max-width: var(--max);
  padding: 0 var(--pad);
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.case-split img{width: 100%; height: auto}
@media(max-width: 820px){.case-split{grid-template-columns: 1fr}}

.case-triple{
  margin: 20px auto 0;
  max-width: var(--max);
  padding: 0 var(--pad);
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px;
}
.case-triple img{width: 100%; height: auto}
@media(max-width: 820px){.case-triple{grid-template-columns: 1fr}}

/* Palette */
.case-palette{
  margin: 56px auto 0;
  max-width: var(--max);
  padding: 0 var(--pad);
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px;
}
.case-palette.three{grid-template-columns: repeat(3, 1fr)}
.case-palette.four{grid-template-columns: repeat(4, 1fr)}
.case-palette .sw{
  aspect-ratio: 1/1;
  display: flex; align-items: flex-end;
  padding: 14px;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: .12em; font-weight: 600;
}

/* Disclaimer */
.case-note{
  margin: 64px auto 0;
  max-width: var(--max);
  padding: 0 var(--pad);
}
.case-note-inner{
  background: var(--bg-3);
  border-left: 2px solid var(--case-accent, var(--ink));
  padding: 20px 24px;
  display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap;
}
.case-note-badge{
  padding: 4px 10px;
  background: var(--ink); color: var(--bg);
  font-family: var(--mono);
  font-size: 10px; letter-spacing: .16em; font-weight: 600;
  flex-shrink: 0;
}
.case-note-text{
  font-family: var(--sans);
  font-size: 13px; line-height: 1.65;
  color: var(--ink-2);
  flex: 1; min-width: 260px;
  letter-spacing: -.005em;
}
.case-note-text strong{color: var(--ink); font-weight: 600}

/* Next case */
.next{
  margin-top: 100px;
  padding: 80px var(--pad);
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.next-inner{
  max-width: var(--max); margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}
.next-label{
  font-family: var(--mono);
  font-size: 11px; letter-spacing: .16em;
  color: var(--ink-3); font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.next-title{
  font-family: var(--display); font-weight: 500;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.1; letter-spacing: -.025em;
  color: var(--ink); margin-bottom: 16px;
}
.next-title .italic{font-style: italic; font-weight: 400; color: var(--ink-3)}
.next-sub{
  font-family: var(--sans);
  font-size: 14px; line-height: 1.55;
  color: var(--ink-3);
  margin-bottom: 28px; max-width: 42ch;
  letter-spacing: -.005em;
}
.next-cta{
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  background: var(--ink); color: var(--bg);
  border-radius: 100px;
  font-family: var(--sans);
  font-size: 13.5px; font-weight: 500;
  letter-spacing: -.005em;
  transition: all .25s var(--ease);
}
.next-cta:hover{background: var(--accent-hi)}
.next-cta .arr{font-size: 15px}
.next-visual{
  aspect-ratio: 4/5; overflow: hidden;
  background: var(--bg-3);
}
.next-visual img{width: 100%; height: 100%; object-fit: cover}
@media(max-width: 900px){
  .next{padding: 60px var(--pad)}
  .next-inner{grid-template-columns: 1fr; gap: 32px}
}

/* Footer */
.footer{
  padding: 28px var(--pad);
  background: var(--bg);
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3); font-weight: 500;
}
.footer .biz{color: var(--ink-4)}