/* ═══════════════════════════════════════════════════════════════
   27TH MARKETING · CASE STUDY / SYSTEMS LAYER
   Extends site.css. Load AFTER site.css:
     <link rel="stylesheet" href="site.css">
     <link rel="stylesheet" href="case.css">
   Mobile-first safe: every grid collapses, every mock scales.
   ═══════════════════════════════════════════════════════════════ */

/* ── Breadcrumb ── */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin-bottom:20px}
.crumb a{color:var(--dim);transition:color .25s}
.crumb a:hover{color:var(--gold)}
.crumb i{opacity:.5;font-style:normal}

/* ── Powered-by badge ── */
.powered{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
  background:rgba(255,255,255,.03);border:1px solid var(--hairline);border-radius:999px;padding:7px 14px}
.powered img{height:16px;width:auto;display:block;filter:invert(1) brightness(1.7);opacity:.95}
.powered b{color:var(--gold);font-weight:700;letter-spacing:.12em}
.powered-band{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  border:1px solid var(--hairline);border-radius:var(--r-m);background:linear-gradient(120deg,rgba(245,197,24,.07),transparent 55%),var(--panel);
  padding:clamp(20px,3vw,30px) clamp(20px,3.4vw,36px)}
.powered-band .pb-t{font-family:var(--font-display);font-weight:600;font-size:clamp(17px,2.2vw,23px);letter-spacing:-.01em;margin:0}
.powered-band .pb-s{font-size:14px;color:var(--muted);margin:7px 0 0;max-width:520px;line-height:1.6}
.powered-band img{height:40px;width:auto;display:block;flex:none;filter:invert(1) brightness(1.7)}

/* ── Case hero ── */
.cs-hero{display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(30px,4.6vw,64px);align-items:center}
@media (max-width:900px){.cs-hero{grid-template-columns:1fr}}
.cs-hero h1{font-size:clamp(34px,5.4vw,70px)}
.cs-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cs-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:clamp(30px,4vw,44px);
  border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);padding-block:22px}
@media (max-width:700px){.cs-meta{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 14px}}
.cs-meta .k{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.cs-meta .v{font-size:14.5px;font-weight:700;line-height:1.4;margin-top:7px;color:var(--ink)}

/* ── Browser / app mock ── */
.mock{border-radius:var(--r-m);overflow:hidden;border:1px solid var(--hairline);background:#0A0A0D;box-shadow:var(--shadow-deep)}
.mock + .mock{margin-top:14px}
.mock-bar{display:flex;align-items:center;gap:6px;height:32px;padding:0 12px;background:rgba(255,255,255,.045);border-bottom:1px solid var(--hairline-2)}
.mock-bar i{width:9px;height:9px;border-radius:50%;flex:none}
.mock-url{flex:1;max-width:230px;margin:0 auto;height:19px;border-radius:999px;background:rgba(255,255,255,.05);
  display:grid;place-items:center;font-family:var(--font-mono);font-size:9.5px;color:var(--dim);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-inline:10px}
.mock-app{display:grid;grid-template-columns:130px minmax(0,1fr)}
@media (max-width:560px){.mock-app{grid-template-columns:minmax(0,1fr)}.mock-side{display:none}}
.mock-side{background:#07070A;border-right:1px solid var(--hairline-2);padding:12px 9px}
.mock-side .brand{font-family:var(--font-mono);font-size:9px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent,var(--gold));
  padding:0 7px 10px;border-bottom:1px solid var(--hairline-2);margin-bottom:8px}
.mock-side span{display:block;font-size:10.5px;color:var(--dim);padding:5.5px 8px;border-radius:7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mock-side span.on{background:color-mix(in srgb,var(--accent,var(--gold)) 15%,transparent);color:var(--accent,var(--gold));font-weight:700}
.mock-main{padding:clamp(11px,1.6vw,15px);min-width:0}
.mock-h{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.mock-h b{font-family:var(--font-display);font-weight:600;font-size:13px;letter-spacing:-.01em}
.mock-h em{font-family:var(--font-mono);font-style:normal;font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.mk-kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}
@media (max-width:640px){.mk-kpis{grid-template-columns:repeat(2,minmax(0,1fr))}}
.mk-kpi{background:rgba(255,255,255,.03);border:1px solid var(--hairline-2);border-radius:9px;padding:9px 10px;min-width:0}
.mk-kpi span{display:block;font-family:var(--font-mono);font-size:8.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mk-kpi b{display:block;font-family:var(--font-display);font-weight:600;font-size:clamp(16px,2.2vw,22px);line-height:1.05;letter-spacing:-.02em;margin-top:5px}
.mk-panel{margin-top:9px;background:rgba(255,255,255,.022);border:1px solid var(--hairline-2);border-radius:10px;padding:11px 12px}
.mk-panel > em{display:block;font-family:var(--font-mono);font-style:normal;font-size:8.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.mk-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 0;border-top:1px solid var(--hairline-2);font-size:11.5px;color:#D6D2C8;min-width:0}
.mk-row:first-of-type{border-top:0;padding-top:0}
.mk-row > span:first-child{min-width:0;overflow:hidden;text-overflow:ellipsis}
.mk-row small{display:block;color:var(--dim);font-size:9.5px;margin-top:2px}
.mk-tag{font-family:var(--font-mono);font-size:9px;letter-spacing:.05em;padding:3px 8px;border-radius:999px;border:1px solid var(--hairline);color:var(--muted);flex:none;white-space:nowrap}
.mk-tag.ok{color:var(--teal);border-color:color-mix(in srgb,var(--teal) 40%,transparent)}
.mk-tag.warn{color:var(--amber);border-color:color-mix(in srgb,var(--amber) 40%,transparent)}
.mk-tag.hot{color:var(--coral);border-color:color-mix(in srgb,var(--coral) 40%,transparent)}
.mk-tag.info{color:var(--blue);border-color:color-mix(in srgb,var(--blue) 40%,transparent)}
.mk-spark{width:100%;height:52px;display:block}
.mock-tilt{transform:perspective(1400px) rotateY(-4deg) rotateX(2deg)}
@media (max-width:900px){.mock-tilt{transform:none}}

/* ── Public-site mock ── */
.sf{background:#0A0A0C}
.sf-top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;border-bottom:1px solid var(--hairline-2)}
.sf-top b{font-family:var(--font-display);font-weight:600;font-size:12.5px;letter-spacing:.08em;white-space:nowrap}
.sf-nav{display:flex;gap:11px;font-size:9px;color:var(--dim)}
@media (max-width:480px){.sf-nav{display:none}}
.sf-cta{font-family:var(--font-mono);font-size:8.5px;letter-spacing:.06em;text-transform:uppercase;background:var(--accent,var(--gold));color:#12100A;border-radius:6px;padding:5px 10px;font-weight:700;white-space:nowrap}
.sf-hero{padding:clamp(16px,2.6vw,26px) 14px;background:linear-gradient(140deg,rgba(255,255,255,.03),transparent 60%)}
.sf-hero em{font-family:var(--font-mono);font-style:normal;font-size:8.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent,var(--gold))}
.sf-hero h4{font-family:var(--font-display);font-weight:600;font-size:clamp(17px,3vw,25px);line-height:1.06;letter-spacing:-.02em;margin:9px 0 8px}
.sf-hero p{font-size:10.5px;color:var(--muted);margin:0;line-height:1.55;max-width:330px}
.sf-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;padding:13px 14px 16px}
@media (max-width:480px){.sf-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
.sf-card{border:1px solid var(--hairline-2);border-radius:9px;overflow:hidden;background:rgba(255,255,255,.025);min-width:0}
.sf-thumb{height:52px;display:grid;place-items:center;font-size:23px;background:linear-gradient(145deg,rgba(255,255,255,.06),transparent)}
.sf-card div{padding:7px 9px}
.sf-card b{display:block;font-size:10px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sf-card span{display:block;font-size:9.5px;color:var(--accent,var(--gold));margin-top:2px}

/* ── Phone mock ── */
.phone-wrap{display:flex;justify-content:center;margin-top:14px}
.phone{width:min(200px,52vw);border-radius:26px;border:1px solid var(--hairline);background:#0A0A0D;padding:9px 7px 11px;box-shadow:var(--shadow-deep)}
.phone .notch{width:52px;height:4px;border-radius:99px;background:rgba(255,255,255,.15);margin:0 auto 8px}
.phone .scr{border-radius:18px;overflow:hidden;background:#08080B;border:1px solid var(--hairline-2);padding:11px 10px}

/* ── Module grid ── */
.mods{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
@media (max-width:900px){.mods{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:440px){.mods{grid-template-columns:1fr}}
.mod{border:1px solid var(--hairline);border-radius:var(--r-m);background:var(--panel);padding:16px 16px 15px;transition:transform .3s var(--ease),border-color .3s}
.mod:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent,var(--gold)) 45%,transparent)}
.mod .i{font-size:19px;line-height:1;display:block;margin-bottom:10px}
.mod b{display:block;font-family:var(--font-display);font-weight:600;font-size:14.5px;letter-spacing:-.01em}
.mod p{font-size:12.5px;color:var(--muted);line-height:1.5;margin:6px 0 0}

/* ── Build timeline ── */
.tl{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(12px,1.6vw,18px)}
@media (max-width:860px){.tl{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.tl{grid-template-columns:1fr}}

/* ── Honesty note / pull quote ── */
.note{border-left:2px solid var(--accent,var(--gold));background:linear-gradient(90deg,color-mix(in srgb,var(--accent,var(--gold)) 7%,transparent),transparent 60%);
  border-radius:0 var(--r-m) var(--r-m) 0;padding:clamp(18px,2.6vw,26px) clamp(18px,2.8vw,30px)}
.note b{font-family:var(--font-display);font-weight:600;font-size:15.5px;display:block;margin-bottom:8px}
.note p{margin:0;font-size:14.5px;line-height:1.65;color:var(--muted)}

/* ── Systems hub cards ── */
.sys-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,22px)}
@media (max-width:820px){.sys-grid{grid-template-columns:1fr}}
.sys{position:relative;display:flex;flex-direction:column;border:1px solid var(--hairline);border-radius:var(--r-l);background:var(--panel);overflow:hidden;
  transition:transform .35s var(--ease),border-color .35s,background .35s}
.sys:hover{transform:translateY(-7px);border-color:color-mix(in srgb,var(--accent,var(--gold)) 50%,transparent);background:#141417}
.sys-top{padding:clamp(22px,3vw,30px) clamp(22px,3vw,30px) 0}
.sys h3{font-family:var(--font-display);font-weight:600;font-size:clamp(21px,2.6vw,27px);letter-spacing:-.02em;margin:15px 0 10px}
.sys p{font-size:14.5px;line-height:1.62;color:var(--muted);margin:0}
.sys-body{padding:0 clamp(22px,3vw,30px) clamp(22px,3vw,30px);margin-top:auto}
.sys-figs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:20px 0 18px;border-top:1px solid var(--hairline-2);padding-top:16px}
.sys-figs b{display:block;font-family:var(--font-display);font-weight:600;font-size:clamp(16px,2vw,20px);color:var(--accent,var(--gold));letter-spacing:-.02em}
.sys-figs span{display:block;font-size:11.5px;color:var(--dim);margin-top:4px;line-height:1.35}
.sys-link{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:14.5px;color:var(--ink)}
.sys-link .arr{transition:transform .3s var(--ease)}
.sys:hover .sys-link .arr{transform:translateX(5px)}

/* ── Related systems ── */
.next-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:760px){.next-grid{grid-template-columns:1fr}}
.next-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1040px){.next-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.next-grid.four{grid-template-columns:1fr}}
.next{display:block;border:1px solid var(--hairline);border-radius:var(--r-m);background:var(--panel);padding:20px;transition:transform .3s var(--ease),border-color .3s}
.next:hover{transform:translateY(-5px);border-color:rgba(245,197,24,.42)}
.next em{font-family:var(--font-mono);font-style:normal;font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--dim)}
.next b{display:block;font-family:var(--font-display);font-weight:600;font-size:17px;letter-spacing:-.01em;margin:9px 0 7px}
.next p{margin:0;font-size:13px;color:var(--muted);line-height:1.5}

/* ── Mobile tightening ── */
@media (max-width:600px){
  .cs-actions .btn-gold,.cs-actions .btn-outline,
  .cta-btns .btn-gold,.cta-btns .btn-outline{width:100%;text-align:center;justify-content:center}
  .powered-band{flex-direction:column;align-items:flex-start}
  .note{border-left-width:2px}
}