*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;background:#FAFAF8;color:#111827;-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.7}
:root{
  --blue:#2563EB;--blue-dim:#EFF4FF;--blue-border:#BFDBFE;
  --red:#DC2626;--red-dim:#FEF2F2;
  --amber:#D97706;--amber-dim:#FFFBEB;
  --purple:#7C3AED;--purple-dim:#F5F3FF;
  --teal:#0D9488;--teal-dim:#F0FDFA;
  --green:#16A34A;--green-dim:#F0FDF4;
  --surface:#fff;--border:#E4E8EE;
  --text:#111827;--text-2:#4B5563;--text-3:#9CA3AF;
  --mono:'IBM Plex Mono',monospace;
}

/* ── Hero ── */
.hero{background:#0C0E13;color:#fff;padding:80px 0 72px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(37,99,235,.18) 0%,transparent 70%)}
.hero-inner{max-width:860px;margin:0 auto;padding:0 40px;position:relative}
.hero-tags{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap}
.htag{font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.07em;text-transform:uppercase;padding:3px 10px;border-radius:3px;border:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.5)}
.htag.blue{color:#93C5FD;border-color:rgba(147,197,253,.25);background:rgba(37,99,235,.12)}
.hero-title{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.1;letter-spacing:-0.03em;margin-bottom:20px;color:#fff}
.hero-title em{font-style:normal;color:#93C5FD}
.hero-sub{font-size:17px;font-weight:400;color:rgba(255,255,255,.55);max-width:560px;line-height:1.6;margin-bottom:40px}
.hero-meta{display:flex;gap:32px;flex-wrap:wrap}
.hm-item{display:flex;flex-direction:column;gap:3px}
.hm-label{font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.3)}
.hm-val{font-size:13.5px;font-weight:500;color:rgba(255,255,255,.75)}
.hero-divider{width:48px;height:2px;background:var(--blue);border-radius:1px;margin-top:40px}

/* ── Layout ── */
.container{max-width:860px;margin:0 auto;padding:0 40px}
.section{padding:72px 0}
.section+.section{border-top:1px solid var(--border)}

/* ── Section headers ── */
.sec-eyebrow{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);margin-bottom:12px}
.sec-title{font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:-0.02em;line-height:1.2;color:var(--text);margin-bottom:16px}
.sec-body{font-size:15px;color:var(--text-2);line-height:1.75;max-width:640px}
.sec-body p+p{margin-top:16px}
.sec-body strong{color:var(--text);font-weight:600}

/* ── Problem ── */
.problem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px}
.prob-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:20px}
.prob-num{font-family:var(--mono);font-size:28px;font-weight:500;line-height:1;margin-bottom:10px}
.prob-num.red{color:var(--red)}
.prob-num.amber{color:var(--amber)}
.prob-num.blue{color:var(--blue)}
.prob-title{font-size:13.5px;font-weight:600;color:var(--text);margin-bottom:6px}
.prob-desc{font-size:12.5px;color:var(--text-3);line-height:1.55}

/* ── Users ── */
.role-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px}
.role-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:22px;position:relative;overflow:hidden}
.role-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px}
.role-card.agent::before{background:var(--blue)}
.role-card.senior::before{background:var(--purple)}
.role-card.lead::before{background:var(--teal)}
.role-chip{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.07em;padding:3px 8px;border-radius:3px;margin-bottom:12px}
.role-chip.agent{background:var(--blue-dim);color:var(--blue)}
.role-chip.senior{background:var(--purple-dim);color:var(--purple)}
.role-chip.lead{background:var(--teal-dim);color:var(--teal)}
.role-name{font-size:16px;font-weight:700;color:var(--text);margin-bottom:8px}
.role-focus{font-size:12px;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.role-desc{font-size:13px;color:var(--text-2);line-height:1.5}
.role-needs{margin-top:12px;display:flex;flex-direction:column;gap:4px}
.role-need{font-size:12.5px;color:var(--text-3);display:flex;gap:6px}
.role-need::before{content:'→';color:var(--text-4);flex-shrink:0}

/* ── Workflow ── */
.workflow-diagram{margin-top:40px;position:relative}
.wf-steps{display:flex;align-items:flex-start;gap:0;position:relative}
.wf-steps::before{content:'';position:absolute;top:20px;left:20px;right:20px;height:1px;background:var(--border);z-index:0}
.wf-step{flex:1;display:flex;flex-direction:column;align-items:center;text-align:center;position:relative;z-index:1;padding:0 8px}
.wf-dot{width:40px;height:40px;border-radius:50%;background:var(--surface);border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;font-weight:500;color:var(--text-3);margin-bottom:10px;flex-shrink:0}
.wf-dot.active{border-color:var(--blue);color:var(--blue);background:var(--blue-dim)}
.wf-dot.decision{border-color:var(--amber);color:var(--amber);background:var(--amber-dim);transform:rotate(45deg)}
.wf-dot.decision span{transform:rotate(-45deg);display:block}
.wf-label{font-size:12px;font-weight:600;color:var(--text);margin-bottom:3px}
.wf-sub{font-size:11px;color:var(--text-3);line-height:1.4}
.wf-role-tag{display:inline-block;font-size:10px;font-weight:600;padding:1px 6px;border-radius:2px;margin-top:5px}
.wf-role-tag.agent{background:var(--blue-dim);color:var(--blue)}
.wf-role-tag.senior{background:var(--purple-dim);color:var(--purple)}
.wf-role-tag.lead{background:var(--teal-dim);color:var(--teal)}
.wf-role-tag.ai{background:#F3F4F6;color:var(--text-3);border:1px solid var(--border)}

/* ── Design decisions ── */
.decisions{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.dec-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:22px}
.dec-num{font-family:var(--mono);font-size:11px;color:var(--text-3);margin-bottom:8px}
.dec-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:8px;letter-spacing:-0.01em}
.dec-body{font-size:13px;color:var(--text-2);line-height:1.55}
.dec-tag{display:inline-block;font-size:10.5px;font-weight:600;padding:2px 8px;border-radius:3px;margin-top:10px}

/* ── Screens ── */
.screens-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
.screen-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;transition:all .2s;text-decoration:none;display:block;color:inherit}
.screen-card:hover{border-color:var(--blue-border);box-shadow:0 8px 32px rgba(37,99,235,.1);transform:translateY(-2px)}
.screen-preview{height:168px;position:relative;overflow:hidden}
.screen-preview-inner{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;color:var(--text-3);flex-direction:column;gap:8px}
.screen-preview-label{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.08em}
.screen-info{padding:14px 16px 16px}
.screen-role{font-family:var(--mono);font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;margin-bottom:6px}
.screen-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:5px}
.screen-desc{font-size:12px;color:var(--text-3);line-height:1.5;margin-bottom:12px}
.screen-link{font-size:12px;font-weight:600;display:flex;align-items:center;gap:4px}

/* Screen preview backgrounds */
.sp-agent{background:linear-gradient(135deg,#EFF4FF 0%,#E0E7FF 100%)}
.sp-senior{background:linear-gradient(135deg,#F5F3FF 0%,#EDE9FE 100%)}
.sp-lead{background:linear-gradient(135deg,#F0FDFA 0%,#CCFBF1 100%)}

/* Mini UI mockups in previews */
.mini-ui{width:85%;display:flex;flex-direction:column;gap:4px}
.mini-row{height:6px;border-radius:3px;background:rgba(0,0,0,.08)}
.mini-row.accent{background:currentColor;opacity:.3}
.mini-block{display:flex;gap:5px}
.mini-col{flex:1;display:flex;flex-direction:column;gap:3px}
.mini-header{height:10px;border-radius:3px;background:rgba(0,0,0,.12);margin-bottom:6px}

/* ── Metrics ── */
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:36px}
.metric-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:18px 16px;text-align:center}
.metric-val{font-size:28px;font-weight:800;letter-spacing:-0.03em;line-height:1;margin-bottom:4px;font-family:var(--mono)}
.metric-val.green{color:var(--green)}
.metric-val.blue{color:var(--blue)}
.metric-val.amber{color:var(--amber)}
.metric-val.purple{color:var(--purple)}
.metric-label{font-size:12px;color:var(--text-3);line-height:1.4}
.metric-note{font-size:11px;color:var(--text-3);font-style:italic;margin-top:3px}

/* ── Reflection ── */
.reflection-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:32px}
.refl-block{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:18px 18px 16px}
.refl-block h4{font-size:13px;font-weight:800;color:var(--text);text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.refl-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.refl-list li{font-size:13px;color:var(--text-2);line-height:1.48;position:relative;padding-left:20px;max-width:100%}
.refl-list li::before{content:'';position:absolute;left:0;top:.72em;transform:translateY(-50%)}
.refl-list.learn li::before{width:7px;height:7px;border-radius:50%;background:var(--purple);box-shadow:0 0 0 3px var(--purple-dim)}
.refl-list.next li::before{content:'→';top:.76em;color:var(--blue);font-weight:800;font-size:14px;line-height:1}
.refl-list li strong,.refl-list li em{font-style:normal;font-weight:700;color:var(--text)}

/* ── Footer ── */
.case-footer{background:#0C0E13;color:rgba(255,255,255,.4);padding:40px 0;margin-top:0}
.case-footer-inner{max-width:860px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between}
.case-footer span{font-family:var(--mono);font-size:11px}
.case-footer a{color:rgba(255,255,255,.3);text-decoration:none;font-family:var(--mono);font-size:11px;transition:color .15s}
.case-footer a:hover{color:rgba(255,255,255,.6)}

/* ── Callout ── */
.callout{border-left:3px solid var(--blue);background:var(--blue-dim);padding:14px 18px;border-radius:0 6px 6px 0;margin:24px 0;font-size:14px;color:#1E3A8A;line-height:1.6}
.callout strong{color:var(--blue)}

@media(max-width:700px){
  .problem-grid,.role-grid,.screens-grid,.metrics-grid{grid-template-columns:1fr}
  .decisions,.reflection-grid{grid-template-columns:1fr}
  .wf-steps{flex-direction:column;gap:20px}
  .wf-steps::before{display:none}
}