/* ═══════════════════════════════════
   ALTERRA AI — VC BUSINESS CASE STYLESHEET
   Shared across all /VC/*.html pages
═══════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#0d1b2a;--navy-mid:#1a2e45;--navy-light:#243b55;
  --blue:#2563eb;--blue-light:#3b82f6;--blue-pale:#eff6ff;
  --indigo:#6366f1;--green:#10b981;--amber:#f59e0b;--rose:#f43f5e;
  --text:#0d1b2a;--text-body:#334155;--muted:#64748b;
  --border:#e2e8f0;--border-dark:#cbd5e1;--white:#ffffff;--surface:#f8fafc;
}
html{scroll-behavior:smooth;overflow-x:hidden}
body{font-family:'Inter',sans-serif;background:var(--white);color:var(--text-body);-webkit-font-smoothing:antialiased;overflow-x:hidden;line-height:1.6}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:300;height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 5rem;background:rgba(13,27,42,0.88);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,0.07)}
.logo-link{text-decoration:none;display:flex;align-items:center}
.logo-img{height:36px;width:auto;display:block;background:rgba(255,255,255,0.95);padding:4px 10px;border-radius:7px}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{font-size:14px;color:rgba(255,255,255,0.5);text-decoration:none;font-weight:400;transition:color .15s}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff}
.nav-right{display:flex;align-items:center;gap:1rem}
.nav-link-plain{font-size:14px;color:rgba(255,255,255,0.5);text-decoration:none;transition:color .15s}
.nav-link-plain:hover{color:#fff}
.nav-cta{background:var(--blue);color:white;padding:9px 20px;font-size:13px;font-weight:500;text-decoration:none;border-radius:6px;white-space:nowrap;transition:background .15s}
.nav-cta:hover{background:var(--blue-light)}

/* BREADCRUMBS */
.crumbs{background:var(--navy);padding:88px 0 0}
.crumbs-inner{max-width:1160px;margin:0 auto;padding:24px 5rem 0;font-size:12px;color:rgba(255,255,255,.4);display:flex;gap:8px;align-items:center}
.crumbs-inner a{color:rgba(255,255,255,.5);text-decoration:none;transition:color .15s}
.crumbs-inner a:hover{color:#93c5fd}
.crumbs-inner .sep{color:rgba(255,255,255,.2)}
.crumbs-inner .current{color:#93c5fd}

/* HERO — BUSINESS CASE */
.bc-hero{background:var(--navy);padding:32px 0 88px;position:relative;overflow:hidden}
.bc-hero-glow{position:absolute;top:20%;right:5%;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,.14) 0%,transparent 70%);pointer-events:none}
.bc-hero-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,0.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.02) 1px,transparent 1px);background-size:64px 64px;opacity:.7}
.bc-hero-inner{position:relative;z-index:2;max-width:1160px;margin:0 auto;padding:32px 5rem 0}
.bc-badge{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:#60a5fa;margin-bottom:1.75rem;background:rgba(37,99,235,0.1);border:1px solid rgba(37,99,235,0.22);padding:6px 14px;border-radius:100px}
.bc-badge-dot{width:6px;height:6px;border-radius:50%;background:#60a5fa}
.bc-h1{font-size:clamp(32px,4.6vw,56px);font-weight:800;line-height:1.06;letter-spacing:-0.04em;color:#fff;margin-bottom:1.25rem;max-width:900px}
.bc-h1 em{font-style:normal;background:linear-gradient(135deg,#60a5fa 0%,#818cf8 50%,#34d399 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.bc-sub{font-size:17px;color:rgba(255,255,255,0.6);line-height:1.75;max-width:680px;font-weight:400;margin-bottom:2rem}
.bc-hero-ctas{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}
.bc-cta{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;padding:13px 24px;font-size:14px;font-weight:600;text-decoration:none;border-radius:8px;transition:background .15s;letter-spacing:.01em}
.bc-cta:hover{background:var(--blue-light)}
.bc-cta-secondary{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.65);padding:13px 18px;font-size:14px;font-weight:500;text-decoration:none;border:1px solid rgba(255,255,255,.12);border-radius:8px;transition:all .15s}
.bc-cta-secondary:hover{color:#fff;border-color:rgba(255,255,255,.25)}

/* HEADLINE METRICS BAND */
.bc-hero-metrics{margin-top:3rem;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.06);border-radius:12px;overflow:hidden;max-width:900px}
.bc-hm-cell{padding:22px 24px;background:rgba(13,27,42,0.7)}
.bc-hm-num{font-size:28px;font-weight:800;color:#60a5fa;letter-spacing:-0.045em;line-height:1}
.bc-hm-label{font-size:11px;color:#64748b;margin-top:6px;line-height:1.5}

/* WRAP */
.wrap{max-width:1160px;margin:0 auto;padding:0 5rem}
.sec-tag{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--blue);margin-bottom:.875rem}
.sec-tag.light{color:#60a5fa}
h2.sh{font-size:clamp(24px,3vw,38px);font-weight:700;color:var(--navy);letter-spacing:-0.035em;line-height:1.12;margin-bottom:.875rem}
h2.sh.light{color:#fff}
.sl{font-size:16px;color:var(--muted);line-height:1.8;max-width:640px}
.sl.light{color:#94a3b8}

/* BUSINESS CASE — 3-column format (Problem / Solution / Benefit) */
.bc-format{padding:96px 0;background:#fff}
.bc-format-header{max-width:760px;margin-bottom:3.5rem}
.bc-panels{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--border)}
.bc-panel{background:#fff;padding:36px 32px;display:flex;flex-direction:column}
.bc-panel-tag{font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin-bottom:1rem;display:inline-flex;align-items:center;gap:8px;width:fit-content}
.bc-panel-tag::before{content:'';width:8px;height:8px;border-radius:2px}
.bc-panel.problem .bc-panel-tag{color:var(--rose)}
.bc-panel.problem .bc-panel-tag::before{background:var(--rose)}
.bc-panel.solution .bc-panel-tag{color:var(--blue)}
.bc-panel.solution .bc-panel-tag::before{background:var(--blue)}
.bc-panel.benefit .bc-panel-tag{color:var(--green)}
.bc-panel.benefit .bc-panel-tag::before{background:var(--green)}
.bc-panel h3{font-size:19px;font-weight:700;color:var(--navy);letter-spacing:-0.02em;line-height:1.25;margin-bottom:.875rem}
.bc-panel > p{font-size:14px;color:var(--text-body);line-height:1.75;margin-bottom:1.25rem}
.bc-panel ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.5rem;margin-top:auto}
.bc-panel li{font-size:13px;color:var(--muted);line-height:1.6;padding-left:20px;position:relative}
.bc-panel.problem li::before{content:'✕';position:absolute;left:0;color:var(--rose);font-weight:700;font-size:11px;top:2px}
.bc-panel.solution li::before{content:'→';position:absolute;left:0;color:var(--blue);font-weight:700;font-size:12px;top:1px}
.bc-panel.benefit li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700;font-size:11px;top:2px}

/* APPROXIMATED BENEFITS TABLE */
.benefits-sec{padding:96px 0;background:var(--surface);border-top:1px solid var(--border)}
.benefits-header{max-width:760px;margin-bottom:2.5rem}
.benefits-table{background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden}
.benefits-table-row{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.2fr;padding:20px 28px;align-items:center;border-bottom:1px solid var(--border);transition:background .15s}
.benefits-table-row:last-child{border-bottom:none}
.benefits-table-row.header{background:var(--navy);color:#fff}
.benefits-table-row.header .btr-label{color:#93c5fd;font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase}
.benefits-table-row:not(.header):hover{background:var(--surface)}
.btr-metric{font-size:14px;font-weight:600;color:var(--navy);letter-spacing:-.01em}
.btr-metric-desc{display:block;font-size:12px;color:var(--muted);font-weight:400;margin-top:2px;letter-spacing:0}
.btr-before,.btr-after{font-size:15px;font-weight:600;color:var(--text-body);letter-spacing:-.02em}
.btr-after{color:var(--blue)}
.btr-delta{font-size:14px;font-weight:700;color:var(--green);letter-spacing:-.01em}
.btr-delta.neutral{color:var(--muted)}

.benefits-note{margin-top:1.25rem;font-size:12px;color:var(--muted);line-height:1.6;max-width:820px}
.benefits-note strong{color:var(--text-body)}

/* WHAT WE BUILD (implementation checklist) */
.build-sec{padding:96px 0;background:#fff}
.build-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:2.5rem}
.build-item{background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:24px 24px 22px;transition:border-color .15s,box-shadow .15s}
.build-item:hover{border-color:var(--blue-light);box-shadow:0 4px 20px rgba(37,99,235,.05)}
.build-item-head{display:flex;align-items:center;gap:12px;margin-bottom:.75rem}
.build-item-icon{width:36px;height:36px;border-radius:9px;background:var(--blue-pale);display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.build-item h4{font-size:15px;font-weight:600;color:var(--navy);letter-spacing:-.01em;line-height:1.3}
.build-item p{font-size:13px;color:var(--muted);line-height:1.7}

/* 90-DAY ROLLOUT */
.rollout-sec{padding:96px 0;background:var(--navy)}
.rollout-header{max-width:720px;margin-bottom:3rem}
.rollout-timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.06);border-radius:12px;overflow:hidden}
.rollout-phase{padding:28px 26px;background:rgba(13,27,42,.7)}
.rollout-num{font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:#60a5fa;margin-bottom:.75rem}
.rollout-phase h4{font-size:15px;font-weight:600;color:#fff;letter-spacing:-.01em;margin-bottom:.5rem;line-height:1.3}
.rollout-phase p{font-size:12px;color:#64748b;line-height:1.7}
.rollout-phase ul{list-style:none;padding:0;margin-top:.75rem;display:flex;flex-direction:column;gap:.35rem}
.rollout-phase li{font-size:11px;color:#94a3b8;padding-left:14px;position:relative;line-height:1.5}
.rollout-phase li::before{content:'●';position:absolute;left:0;color:#3b82f6;font-size:8px;top:3px}

/* KPI DASHBOARD PREVIEW */
.kpi-sec{padding:96px 0;background:var(--surface);border-top:1px solid var(--border)}
.kpi-grid{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
.kpi-copy .sec-tag{margin-bottom:.75rem}
.kpi-copy h2{margin-bottom:1rem}
.kpi-copy p{font-size:15px;color:var(--muted);line-height:1.8;margin-bottom:1.5rem;max-width:520px}
.kpi-viz{background:var(--navy);border-radius:14px;padding:32px;position:relative;overflow:hidden}
.kpi-viz::before{content:'';position:absolute;top:-30%;right:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(37,99,235,.15) 0%,transparent 60%);pointer-events:none}
.kpi-viz-title{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:#93c5fd;margin-bottom:1.5rem;position:relative}
.kpi-row{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:1rem;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.06);position:relative;align-items:center}
.kpi-row:last-child{border-bottom:none}
.kpi-row-name{font-size:13px;color:#e2e8f0;font-weight:500}
.kpi-row-before{font-size:13px;color:#64748b;text-decoration:line-through}
.kpi-row-after{font-size:14px;color:#34d399;font-weight:700;letter-spacing:-.01em}

/* FAQ */
.faq-sec{padding:96px 0;background:#fff;border-top:1px solid var(--border)}
.faq-header{text-align:center;max-width:600px;margin:0 auto 3rem}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:0}
.faq-q{width:100%;background:none;border:none;padding:24px 0;font-family:inherit;font-size:16px;font-weight:600;color:var(--navy);text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem;letter-spacing:-.01em;transition:color .15s}
.faq-q:hover{color:var(--blue)}
.faq-q-icon{width:22px;height:22px;border-radius:50%;background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted);transition:transform .2s,background .15s;flex-shrink:0}
.faq-item.open .faq-q-icon{transform:rotate(45deg);background:var(--blue-pale);color:var(--blue)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease}
.faq-item.open .faq-a{max-height:500px;padding-bottom:24px}
.faq-a p{font-size:14px;color:var(--text-body);line-height:1.8}

/* RELATED CASES */
.related-sec{padding:80px 0;background:var(--surface);border-top:1px solid var(--border)}
.related-header{margin-bottom:2rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.related-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:24px;text-decoration:none;color:inherit;transition:box-shadow .2s,transform .2s,border-color .2s;display:block}
.related-card:hover{box-shadow:0 6px 20px rgba(13,27,42,.06);transform:translateY(-2px);border-color:var(--blue-light)}
.related-icon{font-size:22px;margin-bottom:.75rem;display:block}
.related-card h4{font-size:15px;font-weight:600;color:var(--navy);margin-bottom:.35rem;letter-spacing:-.01em}
.related-card p{font-size:12px;color:var(--muted);line-height:1.6;margin-bottom:.75rem}
.related-link{font-size:12px;color:var(--blue);font-weight:600}

/* CTA BAND */
.cta-band{padding:80px 0;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-mid) 100%);position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;top:-50%;left:-10%;width:60%;height:200%;background:radial-gradient(circle,rgba(37,99,235,.15) 0%,transparent 60%);pointer-events:none}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:640px;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:700;color:#fff;letter-spacing:-.03em;line-height:1.15;margin-bottom:1rem}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.6);margin-bottom:2rem;line-height:1.7}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;padding:16px 32px;font-size:15px;font-weight:600;text-decoration:none;border-radius:8px;transition:background .15s}
.cta-btn:hover{background:var(--blue-light)}
.cta-note{font-size:12px;color:rgba(255,255,255,.35);margin-top:1.25rem}

/* FOOTER */
footer{background:var(--navy);border-top:1px solid rgba(255,255,255,0.06);padding:56px 5rem 36px}
.ft{max-width:1160px;margin:0 auto}
.ft-top{display:grid;grid-template-columns:1.4fr 2fr;gap:5rem;margin-bottom:3rem}
.ft-brand .ft-logo{display:inline-block;margin-bottom:1rem}
.ft-tag{font-size:13px;color:#64748b;line-height:1.7;max-width:280px}
.ft-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem}
.ft-col h4{font-size:12px;color:#fff;font-weight:600;letter-spacing:.5px;text-transform:uppercase;margin-bottom:1.1rem}
.ft-col a{display:block;font-size:13px;color:#64748b;text-decoration:none;padding:5px 0;transition:color .15s}
.ft-col a:hover{color:#93c5fd}
.ft-btm{border-top:1px solid rgba(255,255,255,.06);padding-top:1.75rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.ft-copy{font-size:12px;color:#475569}
.ft-legal{display:flex;gap:1.5rem}
.ft-legal a{font-size:12px;color:#475569;text-decoration:none;transition:color .15s}
.ft-legal a:hover{color:#93c5fd}

/* MOBILE */
@media (max-width:900px){
  nav{padding:0 1.5rem}.nav-links{display:none}
  .crumbs-inner,.bc-hero-inner{padding-left:1.5rem;padding-right:1.5rem}
  .wrap{padding:0 1.5rem}
  .bc-hero-metrics{grid-template-columns:1fr 1fr}
  .bc-panels{grid-template-columns:1fr}
  .benefits-table-row{grid-template-columns:1fr;gap:.5rem;padding:16px 20px}
  .benefits-table-row.header{display:none}
  .benefits-table-row:not(.header) .btr-before::before{content:'Before: ';color:var(--muted);font-weight:400;font-size:12px}
  .benefits-table-row:not(.header) .btr-after::before{content:'After: ';color:var(--muted);font-weight:400;font-size:12px}
  .benefits-table-row:not(.header) .btr-delta::before{content:'Δ ';color:var(--muted);font-weight:400;font-size:12px}
  .build-grid{grid-template-columns:1fr}
  .rollout-timeline{grid-template-columns:1fr 1fr}
  .kpi-grid{grid-template-columns:1fr;gap:2.5rem}
  .related-grid{grid-template-columns:1fr}
  .ft-top{grid-template-columns:1fr;gap:2.5rem}
  .ft-cols{grid-template-columns:1fr 1fr}
  footer{padding:48px 1.5rem 28px}
}