*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0f1418;--bg-card:#151c22;--bg-lift:#1d262d;
  --text:#f7f9f7;--text-mute:#c7ccc6;
  --accent:#4de5c4;--accent-bright:#6df0d4;
  --line:rgba(247,249,247,0.12);--line-strong:rgba(247,249,247,0.24);
  --sans:'Geist',-apple-system,sans-serif;--mono:'JetBrains Mono',monospace;
}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);background:var(--bg);color:var(--text);
  font-size:18.5px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:-20%;z-index:-1;
  background:
    radial-gradient(1000px circle at 15% 10%,rgba(77,229,196,0.22),transparent 55%),
    radial-gradient(800px circle at 85% 90%,rgba(31,197,163,0.18),transparent 55%);
}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-bright)}
.case-nav{
  max-width:1080px;margin:0 auto;padding:32px 32px 0;
  display:flex;justify-content:space-between;align-items:center;gap:24px;
}
.case-nav .mark-logo{height:40px;width:auto;display:block}
.case-nav .back{
  font-family:var(--mono);font-size:12px;letter-spacing:0.08em;
  text-transform:uppercase;color:var(--text-mute);white-space:nowrap;
}
.case-nav .back:hover{color:var(--accent)}
.wrap{max-width:1080px;margin:0 auto;padding:80px 32px 120px}
.kicker{
  font-family:var(--mono);font-size:11px;letter-spacing:0.16em;
  text-transform:uppercase;color:var(--accent);display:inline-flex;
  align-items:center;gap:10px;margin-bottom:24px;
}
.kicker::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 8px rgba(77,229,196,0.5);
}
h1{
  font-size:clamp(2.8rem,5.5vw,4.5rem);font-weight:600;line-height:1.02;
  letter-spacing:-0.035em;margin-bottom:28px;max-width:22ch;
}
.lede{
  font-size:1.3rem;line-height:1.5;color:var(--text-mute);max-width:60ch;
  margin-bottom:64px;padding-bottom:32px;border-bottom:1px solid var(--line);
}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:80px}
.hero-stat{padding:28px 24px;border:1px solid var(--line-strong);border-radius:4px;background:var(--bg-card)}
.hero-stat .val{font-size:clamp(2rem,4vw,2.8rem);font-weight:600;color:var(--accent);letter-spacing:-0.025em;line-height:1}
.hero-stat .lbl{font-family:var(--mono);font-size:10px;letter-spacing:0.14em;text-transform:uppercase;color:var(--text-mute);margin-top:10px}
.chapter{margin-bottom:72px}
.chapter-label{font-family:var(--mono);font-size:11px;letter-spacing:0.14em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.chapter h2{font-size:clamp(1.75rem,3vw,2.5rem);font-weight:600;line-height:1.1;letter-spacing:-0.02em;margin-bottom:20px;color:var(--text)}
.challenge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}
.challenge-card{padding:28px 24px;border:1px solid var(--line);border-radius:4px;background:var(--bg-card)}
.challenge-card h3{font-size:1.1rem;font-weight:600;margin-bottom:10px;color:var(--accent)}
.challenge-card p{font-size:0.97rem;line-height:1.55;margin:0;color:var(--text-mute)}
.solutions{margin-top:24px;display:flex;flex-direction:column;gap:2px}
.solution-row{padding:28px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:60px 1fr;gap:32px;align-items:baseline}
.solution-row:last-child{border-bottom:1px solid var(--line)}
.solution-row .idx{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:0.1em}
.solution-row h3{font-size:1.4rem;font-weight:600;margin-bottom:10px;color:var(--text)}
.solution-row p{color:var(--text-mute);max-width:60ch;margin:0;font-size:1rem;line-height:1.6}
.results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:32px}
.result-card{
  padding:28px 24px;border:1px solid rgba(77,229,196,0.4);
  border-radius:4px;background:linear-gradient(180deg,rgba(77,229,196,0.06),rgba(77,229,196,0.02));
}
.result-card .val{font-size:clamp(1.8rem,3vw,2.4rem);font-weight:600;color:var(--accent);letter-spacing:-0.02em;line-height:1;margin-bottom:8px}
.result-card h3{font-size:1rem;line-height:1.3;margin-bottom:10px}
.result-card p{color:var(--text-mute);margin-top:10px;font-size:0.92rem;line-height:1.5}
.hero-stats-2{grid-template-columns:repeat(2,1fr);max-width:620px}
.results-5{grid-template-columns:repeat(auto-fit,minmax(178px,1fr))}
/* Before / after comparison table */
.ba-table{width:100%;border-collapse:collapse;margin-top:32px;border:1px solid var(--line-strong);border-radius:4px;overflow:hidden}
.ba-table th{
  text-align:left;padding:16px 20px;background:var(--bg-card);
  font-family:var(--mono);font-size:10px;letter-spacing:0.14em;
  text-transform:uppercase;color:var(--text-mute);font-weight:400;
  border-bottom:1px solid var(--line-strong);width:50%;
}
.ba-table th:last-child{color:var(--accent)}
.ba-table td{padding:18px 20px;font-size:0.97rem;line-height:1.5;color:var(--text-mute);border-bottom:1px solid var(--line);vertical-align:top}
.ba-table tr:last-child td{border-bottom:none}
.ba-table td:last-child{color:var(--text)}
.pull-quote{
  margin-top:64px;padding:36px 40px;border-left:2px solid var(--accent);
  background:rgba(77,229,196,0.04);
}
.pull-quote p{font-size:1.3rem;line-height:1.45;letter-spacing:-0.01em;color:var(--text)}
.pull-quote cite{
  display:block;margin-top:18px;font-style:normal;
  font-family:var(--mono);font-size:10px;letter-spacing:0.14em;
  text-transform:uppercase;color:var(--text-mute);
}
@media(max-width:620px){
  .ba-table,.ba-table tbody,.ba-table tr,.ba-table td{display:block;width:100%}
  .ba-table thead{display:none}
  .ba-table tr{border-bottom:1px solid var(--line-strong)}
  .ba-table td{border-bottom:none;padding-bottom:4px}
  .ba-table td:first-child::before{content:"Before · ";color:var(--text-mute);font-family:var(--mono);font-size:10px;letter-spacing:0.12em;text-transform:uppercase}
  .ba-table td:last-child{padding-bottom:18px}
  .ba-table td:last-child::before{content:"After · ";color:var(--accent);font-family:var(--mono);font-size:10px;letter-spacing:0.12em;text-transform:uppercase}
}
.case-cta{
  margin-top:80px;padding:48px;border:1px solid var(--line-strong);border-radius:4px;
  background:linear-gradient(180deg,var(--bg-card),var(--bg-lift));
  display:flex;flex-direction:column;align-items:flex-start;gap:20px;
}
.case-cta h3{font-size:1.6rem;font-weight:600;line-height:1.15;letter-spacing:-0.01em;max-width:30ch}
.case-cta a{
  display:inline-flex;align-items:center;gap:10px;padding:16px 28px;
  border:1px solid var(--accent);background:var(--accent);color:var(--bg);
  font-family:var(--mono);font-size:12px;letter-spacing:0.08em;
  text-transform:uppercase;font-weight:500;transition:all .3s ease;
}
.case-cta a:hover{background:transparent;color:var(--accent)}
.case-footer{
  max-width:1080px;margin:0 auto;padding:32px;
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid var(--line);font-family:var(--mono);
  font-size:10px;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-mute);
}
.case-footer a{color:var(--text-mute)}
.case-footer a:hover{color:var(--accent)}
@media(max-width:860px){
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .challenge-grid{grid-template-columns:1fr}
  .results-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .case-nav{padding-left:22px;padding-right:22px}
  .case-nav .back{font-size:9px}
  .wrap{padding-left:22px;padding-right:22px}
  .results-grid{grid-template-columns:1fr}
  .solution-row{grid-template-columns:42px 1fr;gap:12px}
  .case-footer{padding-left:22px;padding-right:22px}
}