:root {
  --accent-dim: rgba(177,4,200,0.10);
  --accent-light: #d635ef;
  --surface: #f3f0f6;
  --serif: 'Playfair Display', Georgia, serif;
}
body { background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.6; overflow-x: hidden; }

/* Nav */

.nav-back:hover svg { transform:translateX(-3px); }

/* Hero */
.cs-hero { min-height:100vh;display:grid;grid-template-columns:1fr 1fr;align-items:center;padding:9rem 4rem 5rem;position:relative;overflow:hidden; }
.cs-hero-bg { position:absolute;inset:0;background-image:linear-gradient(var(--rule) 1px,transparent 1px),linear-gradient(90deg,var(--rule) 1px,transparent 1px);background-size:60px 60px;opacity:.5; }
.cs-hero-orb { position:absolute;width:640px;height:640px;background:radial-gradient(circle,rgba(177,4,200,.07) 0%,transparent 70%);top:50%;right:-80px;transform:translateY(-50%);pointer-events:none; }
.cs-hero-content { position:relative;z-index:2;max-width:600px; }

.eyebrow-anim { font-family:var(--mono);font-size:.75rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:1.25rem;display:flex;align-items:center;gap:.75rem;opacity:0;animation:fadeUp .8s ease .1s forwards; }
.eyebrow-anim::before { content:'';width:28px;height:1px;background:var(--accent);display:block; }

.cs-title { font-family:var(--serif);font-size:clamp(3.5rem,6vw,6.5rem);font-weight:900;line-height:.95;letter-spacing:-.04em;margin-bottom:.75rem;opacity:0;animation:fadeUp .8s ease .25s forwards; }
.cs-title em { font-style:italic;color:var(--accent); }
.cs-tagline { font-family:var(--serif);font-style:italic;font-size:1.2rem;color:var(--muted);line-height:1.5;max-width:480px;margin-bottom:2rem;opacity:0;animation:fadeUp .8s ease .4s forwards; }

.meta-row { display:flex;gap:2rem;flex-wrap:wrap;margin-bottom:2.5rem;opacity:0;animation:fadeUp .8s ease .55s forwards; }
.meta-item { display:flex;flex-direction:column;gap:.2rem; }
.meta-label { font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted); }
.meta-value { font-size:.875rem;font-weight:500; }

.hero-actions { display:flex;align-items:center;gap:1.5rem;opacity:0;animation:fadeUp .8s ease .7s forwards; }
.btn-primary { display:inline-flex;align-items:center;gap:.6rem;background:var(--accent);color:white;padding:.85rem 1.8rem;border-radius:6px;text-decoration:none;font-size:.875rem;font-weight:500;letter-spacing:.02em;transition:background .2s,transform .2s,box-shadow .2s;box-shadow:0 4px 20px rgba(177,4,200,.28); }
.btn-primary:hover { background:var(--accent-light);transform:translateY(-2px);box-shadow:0 8px 28px rgba(177,4,200,.38); }
.btn-ghost { font-size:.875rem;font-weight:500;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--rule);padding-bottom:2px;transition:color .2s,border-color .2s; }
.btn-ghost:hover { color:var(--accent);border-color:var(--accent); }

/* Hero visual */
.cs-hero-visual { position:relative;z-index:2;display:flex;align-items:center;justify-content:center;opacity:0;animation:fadeIn 1.2s ease .65s forwards; }
.hero-img-stack { position:relative;width:280px; }
.hero-main-img { width:100%;border-radius:20px;box-shadow:0 40px 80px rgba(14,11,18,.22); }
.hero-badge {
  position:absolute;background:white;border-radius:12px;
  box-shadow:0 8px 28px rgba(14,11,18,.12);padding:.9rem 1.1rem;
}
.hb-1 { top:-16px;right:-50px;display:flex;align-items:center;gap:.75rem; }
.hb-2 { bottom:20px;left:-50px; }
.hb-icon { width:36px;height:36px;border-radius:9px;background:var(--accent-dim);display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0; }
.hb-num { font-family:var(--serif);font-size:1.4rem;font-weight:900;line-height:1;color:var(--ink); }
.hb-num em { font-style:normal;color:var(--accent); }
.hb-lbl { font-size:.68rem;color:var(--muted); }
.hb-tag { font-family:var(--mono);font-size:.58rem;letter-spacing:.08em;text-transform:uppercase;padding:.2rem .55rem;border-radius:100px;background:var(--accent-dim);color:var(--accent);display:inline-block;margin-bottom:.3rem; }

/* Stats strip */
.stats-strip { background:var(--ink);display:grid;grid-template-columns:repeat(4,1fr); }
.stat-cell { padding:3rem 2.5rem;border-right:1px solid rgba(255,255,255,.07);transition:background .3s; }
.stat-cell:hover { background:rgba(177,4,200,.06); }
.stat-cell:last-child { border-right:none; }
.stat-n { font-family:var(--serif);font-size:2.6rem;font-weight:900;color:white;line-height:1;letter-spacing:-.03em; }
.stat-n em { font-style:normal;color:var(--accent); }
.stat-lbl { font-family:var(--mono);font-size:.65rem;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.35);margin-top:.4rem; }

/* Shared */
.section { padding:6rem 4rem; }
.section-wide { max-width:1160px;margin:0 auto; }

.eyebrow { font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:1rem;display:flex;align-items:center;gap:.6rem; }
.eyebrow::before { content:'';width:24px;height:1px;background:var(--accent);display:block; }
.section-headline { font-family:var(--serif);font-size:clamp(2rem,3vw,3rem);font-weight:900;letter-spacing:-.03em;line-height:1.1;margin-bottom:1rem; }
.section-headline em { font-style:italic;color:var(--accent); }
.section-sub { font-size:.975rem;color:var(--muted);line-height:1.85;max-width:680px;margin-bottom:3rem; }
.body-text { font-size:.975rem;color:var(--muted);line-height:1.85;margin-bottom:1.25rem; }

/* Process nav */
.process-nav { background:var(--surface);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:0 4rem;display:flex;gap:0;overflow-x:auto;position:sticky;top:73px;z-index:90; }
.pnav-item { font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;padding:1.25rem 2rem;color:var(--muted);text-decoration:none;white-space:nowrap;border-bottom:2px solid transparent;transition:color .2s,border-color .2s; }
.pnav-item:hover { color:var(--accent);border-color:var(--accent); }

/* Problem */
.problem-grid { display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start; }
.problem-statement { font-family:var(--serif);font-size:1.2rem;font-style:italic;color:var(--ink);line-height:1.6;border-left:3px solid var(--accent);padding-left:1.5rem;margin-bottom:2rem; }
.hmw-card { background:var(--ink);border-radius:14px;padding:2rem;position:relative;overflow:hidden; }
.hmw-card::before { content:'"HMW"';font-family:var(--serif);font-size:6rem;font-weight:900;color:rgba(255,255,255,.03);position:absolute;top:-1rem;right:1rem;line-height:1; }
.hmw-label { font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:.75rem; }
.hmw-text { font-family:var(--serif);font-size:1rem;font-style:italic;color:rgba(255,255,255,.85);line-height:1.7; }

/* Discovery */
.two-col { display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start; }
.quote-card { background:var(--surface);border-radius:12px;padding:1.75rem 1.75rem 1.75rem 2.25rem;border-left:3px solid var(--accent);position:relative;margin-bottom:1.25rem; }
.quote-mark { font-family:var(--serif);font-size:3.5rem;line-height:1;color:var(--accent);opacity:.25;position:absolute;top:.5rem;left:1rem; }
.quote-text { font-family:var(--serif);font-size:.975rem;font-style:italic;color:var(--ink);line-height:1.7;padding-top:.5rem; }
.quote-attr { font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:.75rem; }

.img-card { background:white;border-radius:14px;overflow:hidden;border:1px solid var(--rule); }
.img-card img { width:100%;display:block; }
.img-card-caption { font-size:.8rem;color:var(--muted);padding:.75rem 1rem;border-top:1px solid var(--rule);line-height:1.55; }

/* Define */
.theme-pills { display:flex;flex-wrap:wrap;gap:.6rem;margin:1.25rem 0 2rem; }
.theme-pill { font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding:.45rem 1rem;border-radius:100px;border:1px solid var(--rule);color:var(--muted);background:white;transition:border-color .2s,color .2s,background .2s; }
.theme-pill:hover { border-color:var(--accent);color:var(--accent);background:var(--accent-dim); }

.gap-list { list-style:none;display:flex;flex-direction:column;gap:.8rem;margin-top:1.25rem; }
.gap-list li { display:flex;gap:.75rem;font-size:.9rem;color:var(--muted);line-height:1.65;align-items:flex-start; }
.gap-num { font-family:var(--mono);font-size:.68rem;color:var(--accent);flex-shrink:0;margin-top:.15em;font-weight:500; }

/* Ideate */
.four-col { display:grid;grid-template-columns:repeat(4,1fr);gap:1rem; }
.img-frame { border-radius:12px;overflow:hidden;border:1px solid var(--rule);background:white;transition:transform .3s,box-shadow .3s; }
.img-frame:hover { transform:translateY(-4px);box-shadow:0 12px 32px rgba(14,11,18,.1); }
.img-frame img { width:100%;display:block; }
.img-frame-label { font-family:var(--mono);font-size:.6rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);text-align:center;padding:.5rem;border-top:1px solid var(--rule); }

/* Final designs */
.final-section { background:var(--ink); }
.final-section .eyebrow { color:rgba(177,4,200,.85); }
.final-section .eyebrow::before { background:rgba(177,4,200,.85); }
.final-section .section-headline { color:white; }
.final-section .section-sub { color:rgba(255,255,255,.45); }

.screens-row { display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-bottom:1.5rem; }
.screen-card { border-radius:16px;overflow:hidden;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);transition:transform .4s,border-color .3s; }
.screen-card:hover { transform:translateY(-6px);border-color:rgba(177,4,200,.3); }
.screen-card img { width:100%;display:block;transition:transform .5s; }
.screen-card:hover img { transform:scale(1.02); }
.screen-card-body { padding:1.25rem 1.5rem 1.5rem; }
.screen-card-name { font-family:var(--serif);font-size:1.05rem;font-weight:700;color:white;margin-bottom:.5rem; }
.screen-card-features { list-style:none;display:flex;flex-direction:column;gap:.4rem; }
.screen-card-features li { font-size:.8rem;color:rgba(255,255,255,.42);line-height:1.55;display:flex;gap:.6rem;align-items:flex-start; }
.screen-card-features li::before { content:'→';color:var(--accent);flex-shrink:0; }

/* Validate */
.test-methods-grid { display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-bottom:3rem; }
.test-card { background:white;border-radius:14px;padding:1.75rem;box-shadow:0 2px 12px rgba(14,11,18,.05); }
.test-card-tag { font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:.6rem; }
.test-card-title { font-family:var(--serif);font-size:1.1rem;font-weight:700;margin-bottom:.75rem; }
.test-card-list { list-style:none;display:flex;flex-direction:column;gap:.4rem; }
.test-card-list li { font-size:.85rem;color:var(--muted);display:flex;gap:.6rem;align-items:flex-start; }
.test-card-list li::before { content:'·';color:var(--accent);font-size:1.4rem;line-height:.9; }

.scores-grid { display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;margin:2.5rem 0; }
.score-card { background:white;border-radius:12px;padding:1.5rem;text-align:center;box-shadow:0 2px 10px rgba(14,11,18,.05);border-bottom:3px solid var(--accent); }
.score-val { font-family:var(--serif);font-size:2rem;font-weight:900;color:var(--ink);line-height:1; }
.score-val em { font-style:normal;color:var(--accent); }
.score-metric { font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:.3rem; }
.score-note { font-size:.75rem;color:var(--accent);margin-top:.3rem;font-weight:500; }

/* Reflection */
.reflection-grid { display:grid;grid-template-columns:1fr 1fr;gap:3rem; }
.refl-head { display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem; }
.refl-icon { font-size:1.4rem; }
.refl-title { font-family:var(--serif);font-size:1.2rem;font-weight:700; }
.refl-list { list-style:none;display:flex;flex-direction:column;gap:1rem; }
.refl-list li { font-size:.9rem;color:var(--muted);line-height:1.7;display:flex;gap:.75rem;align-items:flex-start;padding-bottom:1rem;border-bottom:1px solid var(--rule); }
.refl-list li:last-child { border-bottom:none;padding-bottom:0; }
.refl-list li::before { content:'→';color:var(--accent);flex-shrink:0;margin-top:.15em; }

/* Next */
.next-bar { background:var(--ink);padding:5rem 4rem;display:flex;align-items:center;justify-content:space-between;border-top:1px solid rgba(255,255,255,.06); }
.next-label { font-family:var(--mono);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:rgba(255,255,255,.3);margin-bottom:.75rem; }
.next-title { font-family:var(--serif);font-size:2rem;font-weight:700;color:white;letter-spacing:-.03em; }
.next-title em { font-style:italic;color:var(--accent); }
.next-arrow { width:60px;height:60px;border-radius:50%;border:1px solid rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;color:white;text-decoration:none;transition:background .2s,border-color .2s,transform .2s; }
.next-arrow:hover { background:var(--accent);border-color:var(--accent);transform:translateX(4px); }

/* Reveal */
.reveal { opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease; }
.reveal.visible { opacity:1;transform:translateY(0); }
.reveal-delay-1 { transition-delay:.1s; }
.reveal-delay-2 { transition-delay:.2s; }
.reveal-delay-3 { transition-delay:.3s; }
.reveal-delay-4 { transition-delay:.4s; }

@keyframes fadeUp { from{opacity:0;transform:translateY(22px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }

@media(max-width:960px){
  nav,.next-bar { padding-left:1.5rem;padding-right:1.5rem; }
  .cs-hero { grid-template-columns:1fr;padding:6rem 1.5rem 3rem; }
  .cs-hero-visual { display:none; }
  .section { padding:4rem 1.5rem; }
  .stats-strip,.scores-grid { grid-template-columns:1fr 1fr; }
  .problem-grid,.two-col,.reflection-grid,.test-methods-grid { grid-template-columns:1fr;gap:2rem; }
  .four-col,.screens-row { grid-template-columns:1fr 1fr; }
  .process-nav { padding:0 1.5rem;top:61px; }
  footer { flex-direction:column;gap:1.5rem;text-align:center; }
  .next-bar { flex-direction:column;align-items:flex-start;gap:2rem; }
}