/* ===== Case-study specific ===== */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-3); padding: 22px 0 4px; }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb .sep { color: var(--text-4); }
.breadcrumb .cur { color: var(--purple-2); }

.cs-layout { display: grid; grid-template-columns: 288px 1fr; gap: 40px; align-items: start; padding-bottom: 60px; }

/* Sidebar */
.cs-sidebar { position: sticky; top: 94px; display: grid; gap: 22px; }
.back-link { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-3); }
.back-link:hover { color: var(--text); }
.cs-sidebar .cs-title { font-size: 30px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; margin: 4px 0 12px; }
.cs-sidebar .cs-desc { font-size: 13.5px; color: var(--text-2); line-height: 1.55; margin-bottom: 18px; }
.side-nav { display: grid; gap: 4px; margin-top: 4px; }
.side-nav a { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 11px; font-size: 13.5px; color: var(--text-3); transition: all .16s ease; }
.side-nav a .idx { font-size: 12px; font-weight: 700; color: var(--text-4); }
.side-nav a:hover { background: rgba(255,255,255,0.03); color: var(--text-2); }
.side-nav a.active { background: var(--grad-card); border: 1px solid rgba(139,92,246,0.3); color: var(--text); }
.side-nav a.active .idx { color: var(--purple-2); }
.side-cta { background: var(--grad-card); border: 1px solid rgba(139,92,246,0.3); border-radius: var(--radius); padding: 20px; }
.side-cta h4 { font-size: 16px; font-weight: 700; line-height: 1.3; }
.side-cta p { font-size: 12.5px; color: var(--text-3); margin: 8px 0 16px; line-height: 1.5; }
.side-cta .btn { width: 100%; justify-content: center; }

/* Main sections */
.cs-main { display: grid; gap: 26px; min-width: 0; }
.cs-block { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 30px; }
.block-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.block-head .num { font-size: 30px; font-weight: 800; color: var(--purple); line-height: 1; -webkit-text-stroke: 0; opacity: .9; }
.block-head h2 { font-size: 22px; font-weight: 800; letter-spacing: -0.01em; }

/* 01 intro */
.intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 26px; align-items: stretch; }
.intro-grid p.body { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.inax-visual {
  border-radius: var(--radius); overflow: hidden; min-height: 210px;
  background:
    radial-gradient(120% 120% at 80% 20%, rgba(90,90,120,0.35), transparent 55%),
    linear-gradient(155deg, #14141c 0%, #1c1c26 45%, #0e0e15 100%);
  border: 1px solid var(--border); position: relative;
  display: flex; flex-direction: column; justify-content: center; padding: 30px;
}
.inax-visual::after {
  content: ""; position: absolute; right: 24px; bottom: 22px; width: 120px; height: 150px;
  background: linear-gradient(160deg, #e8eaf0, #b9bcc9); border-radius: 40px 40px 18px 18px;
  box-shadow: -18px 12px 40px rgba(0,0,0,0.5), inset 0 -20px 30px rgba(0,0,0,0.15); opacity: .9;
}
.inax-visual .brand-mark { font-size: 40px; font-weight: 900; letter-spacing: 3px; color: #fff; position: relative; z-index: 2; }
.inax-visual .brand-sub { font-size: 11px; letter-spacing: 2px; color: var(--text-3); margin-top: 8px; position: relative; z-index: 2; }
.info-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 24px; }
.info-tile { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; text-align: center; }
.info-tile .icon-tile { margin: 0 auto 10px; width: 40px; height: 40px; }
.info-tile .lbl { font-size: 11px; color: var(--text-3); }
.info-tile .val { font-size: 13.5px; font-weight: 700; margin-top: 3px; }

/* 02 status */
.status-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: start; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.metric-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.metric-card .mh { display: flex; align-items: center; justify-content: space-between; }
.metric-card .mt { font-size: 12px; color: var(--text-3); }
.metric-card .mv { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin-top: 4px; }
.metric-card .mv .u { font-size: 13px; color: var(--text-3); font-weight: 600; }
.metric-card .mn { font-size: 11px; color: var(--text-4); margin-top: 2px; }

/* 03 solution */
.solution-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; align-items: start; }
.sol-step { text-align: center; position: relative; }
.sol-step .node { width: 56px; height: 56px; margin: 0 auto 12px; border-radius: 16px; background: rgba(139,92,246,0.10); border: 1px solid rgba(139,92,246,0.28); display: grid; place-items: center; color: var(--purple-2); }
.sol-step .node svg { width: 24px; height: 24px; }
.sol-step h4 { font-size: 12.5px; font-weight: 700; line-height: 1.3; }
.sol-step .conn { position: absolute; top: 28px; right: -3px; color: var(--text-4); }
.highlight-box { background: var(--grad-card); border: 1px solid rgba(139,92,246,0.25); border-radius: var(--radius); padding: 22px; margin-top: 26px; }
.highlight-box .hb-title { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--purple-2); margin-bottom: 16px; }
.hl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 26px; }
.hl-item { display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--text-2); }
.hl-item .ic { width: 20px; height: 20px; border-radius: 50%; background: rgba(52,211,153,0.14); color: var(--green); display: grid; place-items: center; flex-shrink: 0; }
.hl-item .ic svg { width: 11px; height: 11px; }

/* 04 results */
.results-top { display: grid; grid-template-columns: 1fr 1.2fr; gap: 26px; align-items: start; }
.results-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.result-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.result-card .rt { font-size: 12px; color: var(--text-3); }
.result-card .rv { font-size: 30px; font-weight: 800; letter-spacing: -0.02em; margin-top: 3px; }
.result-card .rv .u { font-size: 13px; color: var(--text-3); font-weight: 600; }
.result-card .rd { font-size: 12px; font-weight: 700; color: var(--green); margin-top: 3px; display: inline-flex; align-items: center; gap: 4px; }
.growth-chart { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.growth-chart .gh { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.growth-chart .gh .gt { font-size: 14px; font-weight: 700; }
.growth-chart .legend { display: flex; gap: 16px; font-size: 11px; color: var(--text-3); }
.growth-chart .legend span { display: inline-flex; align-items: center; gap: 6px; }
.growth-chart .legend .d { width: 10px; height: 10px; border-radius: 50%; }
.impact-box { margin-top: 22px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.impact-box .ib-title { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--purple-2); margin-bottom: 20px; }
.impact-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.impact-item { display: flex; gap: 12px; align-items: flex-start; }
.impact-item .icon-tile { width: 40px; height: 40px; }
.impact-item .iv { font-size: 22px; font-weight: 800; }
.impact-item .iv.pos { color: var(--green); }
.impact-item .iv.neg { color: var(--purple-2); }
.impact-item .il { font-size: 11px; color: var(--text-3); line-height: 1.4; margin-top: 2px; }

/* Testimonial */
.testimonial { background: var(--grad-card); border: 1px solid rgba(139,92,246,0.28); border-radius: var(--radius); padding: 24px; }
.testimonial .quote-mark { font-size: 40px; line-height: .5; color: var(--purple); font-weight: 900; }
.testimonial p { font-size: 15px; color: var(--text); line-height: 1.55; margin: 10px 0 18px; font-style: italic; }
.testimonial .author strong { display: block; font-size: 15px; font-weight: 800; }
.testimonial .author .role { font-size: 12px; color: var(--text-3); margin-top: 2px; }

/* 06 other case studies */
.other-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.other-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all .2s ease; }
.other-card:hover { border-color: var(--border-glow); transform: translateY(-3px); }
.other-thumb { aspect-ratio: 16/10; background: linear-gradient(155deg,#1a1a24,#0f0f16); position: relative; }
.other-thumb::after { content:""; position:absolute; right:18px; bottom:14px; width:46px; height:60px; background:linear-gradient(160deg,#d5d8e2,#a9adbd); border-radius:16px 16px 8px 8px; opacity:.55; }
.other-card .oc { padding: 16px; }
.other-card h4 { font-size: 15px; font-weight: 700; }
.other-card .cat { font-size: 11.5px; color: var(--text-3); margin-top: 2px; }
.other-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.other-stats .os .l { font-size: 10px; color: var(--text-4); }
.other-stats .os .v { font-size: 15px; font-weight: 800; }
.other-stats .os .v.g { color: var(--green); }
.other-stats .os .v.c { color: var(--cyan); }
.other-card .detail { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--purple-2); font-weight: 600; margin-top: 14px; }

.section-title-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.section-title-row .num { font-size: 30px; font-weight: 800; color: var(--purple); }
.section-title-row .link { font-size: 13px; color: var(--purple-2); font-weight: 600; }

@media (max-width: 980px) {
  .cs-layout { grid-template-columns: 1fr; gap: 24px; }
  .cs-sidebar { position: static; }
  .side-nav { display: none; }
  .intro-grid, .status-grid, .results-top { grid-template-columns: 1fr; }
  .solution-flow { grid-template-columns: repeat(3, 1fr); gap: 22px 6px; }
  .sol-step .conn { display: none; }
  .impact-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .hl-grid { grid-template-columns: 1fr 1fr; }
  .other-grid { grid-template-columns: 1fr 1fr; }
  .info-tiles { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .cs-block { padding: 20px; }
  .metric-grid, .results-metrics, .info-tiles { grid-template-columns: 1fr 1fr; }
  .solution-flow { grid-template-columns: 1fr 1fr; }
  .impact-grid, .hl-grid, .other-grid { grid-template-columns: 1fr; }
  .impact-grid { grid-template-columns: 1fr 1fr; }
}