/* ============================================================
   Signal-Fire — Institutional design system (greyscale / chrome)
   ============================================================ */
:root{
  --ink:#0a0b0d; --graphite:#16181c; --steel:#2b2f36; --slate:#565c66;
  --muted:#7b828d; --silver:#a7adb6; --mist:#d8dbe0; --line:#e4e6ea;
  --fog:#f5f6f8; --paper:#ffffff;
  --accent:#2b2f36;               /* per-site override */
  --accent-soft:#565c66;
  --chrome:linear-gradient(135deg,#b9bec6 0%,#eef1f4 42%,#9ea4ad 100%);
  --chrome-dark:linear-gradient(135deg,#2b2f36 0%,#454b54 45%,#1a1c20 100%);
  --radius:4px; --radius-lg:8px;
  --shadow:0 1px 2px rgba(10,11,13,.06),0 8px 24px rgba(10,11,13,.06);
  --shadow-hover:0 2px 6px rgba(10,11,13,.10),0 18px 48px rgba(10,11,13,.12);
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased;font-size:16px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 28px}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.01em;color:var(--ink)}
svg.ic{width:22px;height:22px;stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;display:block}
.mono{font-family:var(--sans);font-feature-settings:'tnum';letter-spacing:.02em}
.eyebrow{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:var(--radius);font-family:var(--sans);
  font-weight:600;font-size:14px;letter-spacing:.01em;cursor:pointer;transition:.2s;border:1px solid transparent}
.btn .ic{width:17px;height:17px;stroke-width:2}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-primary:hover{background:var(--steel);border-color:var(--steel);transform:translateY(-1px)}
.btn-secondary{background:#fff;color:var(--ink);border-color:var(--mist)}
.btn-secondary:hover{border-color:var(--slate);background:var(--fog)}
.btn-ghost{background:transparent;color:var(--ink);border-color:transparent;padding-left:0}
.btn-wa{background:#0b0c0e;color:#fff;border-color:#0b0c0e}
.btn-wa:hover{background:var(--steel)}
.btn-block{width:100%;justify-content:center}

/* ---------- Navbar ---------- */
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:11px}
.logo-mark{width:38px;height:38px;border-radius:7px;background:#0d0e10;display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.logo-mark img{width:100%;height:100%;object-fit:cover}
.logo-mark svg{width:18px;height:18px;stroke:#eef1f4;stroke-width:1.6;fill:none}
.footer-logo-img{height:52px;width:auto;display:block;margin-bottom:16px;border-radius:8px}
.logo-plate{display:inline-block;padding:9px 13px;border:1px solid rgba(255,255,255,.10);border-radius:8px;background:rgba(255,255,255,.02);line-height:0}
.logo-plate img{height:24px;width:auto;display:block}
.info-card .logo-plate{padding:8px 11px}
.info-card .logo-plate img{height:22px}
.logo-text{font-family:var(--serif);font-weight:600;font-size:18px;letter-spacing:-.01em}
.logo-text b{font-weight:600}
.logo-text .sub{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);display:block;line-height:1;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{padding:9px 14px;font-size:14px;font-weight:500;color:var(--slate);border-radius:var(--radius);transition:.15s}
.nav-links a:hover{color:var(--ink);background:var(--fog)}
.nav-links a.active{color:var(--ink)}
.nav-links a.nav-cta{background:var(--ink);color:#fff;margin-left:6px}
.nav-links a.nav-cta:hover{background:var(--steel)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.mobile-toggle span{width:22px;height:2px;background:var(--ink);transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;padding:88px 0 76px;background:
  radial-gradient(120% 120% at 85% -10%,rgba(43,47,54,.05),transparent 55%),
  linear-gradient(180deg,var(--fog),var(--paper))}
.hero-container{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border:1px solid var(--mist);border-radius:100px;
  font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--slate);background:#fff;margin-bottom:22px}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--steel)}
.hero-title{font-size:clamp(34px,4.4vw,52px);margin-bottom:20px}
.hero-title .thin{color:var(--slate);font-weight:400;font-style:italic}
.hero-desc{font-size:17px;color:var(--slate);margin-bottom:30px;max-width:36em}
.hero-desc strong{color:var(--ink);font-weight:600}
.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.hero-trust{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-family:var(--sans);font-size:12.5px;color:var(--muted)}
.hero-trust .sep{width:3px;height:3px;border-radius:50%;background:var(--silver)}
.hero-trust b{color:var(--steel);font-weight:600}

/* ---------- Console (replaces cartoon dashboard) ---------- */
.console{background:var(--graphite);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-hover);border:1px solid #24272c}
.console-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid #2a2e34}
.console-top .title{font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--silver)}
.console-top .live{display:flex;align-items:center;gap:7px;font-family:var(--sans);font-size:11px;color:var(--silver)}
.console-top .live .d{width:7px;height:7px;border-radius:50%;background:#9aa1ab;box-shadow:0 0 0 3px rgba(154,161,171,.18);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}
.console-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.console-cell{background:#1b1e23;border:1px solid #2a2e34;border-radius:6px;padding:13px}
.console-cell .k{font-family:var(--sans);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--silver)}
.console-cell .v{font-family:var(--serif);font-size:24px;color:#f2f4f6;margin-top:3px}
.console-cell .t{font-family:var(--sans);font-size:11px;color:#8b929c;margin-top:2px}
.console-flow{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding-top:14px;border-top:1px solid #2a2e34}
.console-flow .step{font-family:var(--sans);font-size:11.5px;font-weight:500;color:#c3c8d0;background:#1b1e23;border:1px solid #2a2e34;padding:6px 10px;border-radius:5px}
.console-flow .step.on{background:var(--chrome);color:#16181c;border-color:transparent;font-weight:600}
.console-flow .arr{color:#5b626c}
.console-bars{display:flex;align-items:flex-end;gap:6px;height:70px;padding-top:8px}
.console-bars .bar{flex:1;background:linear-gradient(180deg,#5b626c,#2f343b);border-radius:2px 2px 0 0}

/* ---------- Sections ---------- */
section{padding:78px 0}
.section-label{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.section-title{font-size:clamp(26px,3vw,36px);margin-bottom:16px;max-width:20em}
.section-sub{font-size:16.5px;color:var(--slate);max-width:44em;margin-bottom:8px}
.rule{height:1px;background:var(--line);border:none;margin:0}

/* ---------- Challenge / cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:38px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:34px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;transition:.2s}
.card:hover{border-color:var(--silver);box-shadow:var(--shadow);transform:translateY(-2px)}
.card .ic-wrap{width:42px;height:42px;border-radius:8px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);margin-bottom:16px}
.card .stat{font-family:var(--serif);font-size:30px;color:var(--ink);margin-bottom:4px}
.card h4{font-size:16px;margin-bottom:7px}
.card p{font-size:13.5px;color:var(--slate);line-height:1.55}

/* ---------- Flow (orchestrator) ---------- */
.flow{display:flex;align-items:stretch;gap:0;margin-top:40px;flex-wrap:wrap;justify-content:center}
.flow-node{flex:1;min-width:150px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 18px;text-align:center;transition:.2s}
.flow-node:hover{border-color:var(--silver);box-shadow:var(--shadow)}
.flow-node.lead{background:var(--graphite);border-color:var(--graphite)}
.flow-node.lead .ic-wrap{background:#22262c;border-color:#2f343b;color:#eef1f4}
.flow-node.lead .fl-label{color:#f2f4f6}
.flow-node.lead .fl-desc{color:#9aa1ab}
.flow-node .ic-wrap{width:44px;height:44px;border-radius:9px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);margin:0 auto 12px}
.fl-label{font-family:var(--serif);font-size:15px;font-weight:600;margin-bottom:4px}
.fl-desc{font-size:12px;color:var(--muted)}
.flow-arr{display:flex;align-items:center;color:var(--silver);padding:0 6px}
.flow-cta{text-align:center;margin-top:40px}

/* ---------- Metrics ---------- */
.metrics{background:var(--ink);color:#fff}
.metrics .section-label{color:var(--silver)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.metric{text-align:center;padding:8px}
.metric .num{font-family:var(--serif);font-size:clamp(34px,4vw,48px);color:#fff;line-height:1}
.metric .num::after{content:'%'}
.metric .lbl{font-family:var(--sans);font-size:13px;color:var(--silver);margin-top:8px;letter-spacing:.01em}
.metrics-note{text-align:center;font-family:var(--sans);font-size:11.5px;color:#6b727c;margin-top:36px;letter-spacing:.02em}

/* ---------- Page hero ---------- */
.page-hero{padding:64px 0 40px;background:linear-gradient(180deg,var(--fog),var(--paper));border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(30px,3.6vw,42px);margin-bottom:14px}
.page-hero p{font-size:17px;color:var(--slate);max-width:44em}

/* ---------- Agents ---------- */
.agents{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:12px}
.agent{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;transition:.2s}
.agent:hover{border-color:var(--silver);box-shadow:var(--shadow);transform:translateY(-2px)}
.agent.lead{background:var(--graphite);border-color:var(--graphite);color:#fff}
.agent.lead h3,.agent.lead p{color:#fff}
.agent.lead .ic-wrap{background:#22262c;border-color:#2f343b;color:#eef1f4}
.agent.lead .role{color:var(--silver);border-color:#2f343b}
.agent.lead li{color:#c3c8d0;border-color:#2a2e34}
.agent .ic-wrap{width:44px;height:44px;border-radius:9px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);margin-bottom:15px}
.agent h3{font-size:17px;margin-bottom:6px}
.agent .role{display:inline-block;font-family:var(--sans);font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:100px;padding:3px 10px;margin-bottom:14px}
.agent > p{font-size:13.5px;color:var(--slate);margin-bottom:14px}
.agent ul{list-style:none}
.agent li{font-family:var(--sans);font-size:13px;color:var(--slate);padding:8px 0 8px 22px;border-top:1px solid var(--line);position:relative}
.agent li::before{content:'';position:absolute;left:0;top:14px;width:11px;height:6px;border-left:1.5px solid var(--steel);border-bottom:1.5px solid var(--steel);transform:rotate(-45deg)}

/* ---------- Features (legal solution) ---------- */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:920px;margin:36px auto 0}
.feature{background:#fff;border:1px solid var(--line);border-top:2px solid var(--steel);border-radius:var(--radius-lg);padding:26px;transition:.2s}
.feature:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.feature .ic-wrap{width:42px;height:42px;border-radius:8px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);margin-bottom:14px}
.feature h4{font-size:16px;margin-bottom:12px}
.feature ul{list-style:none}
.feature li{font-family:var(--sans);font-size:13.5px;color:var(--slate);padding:7px 0 7px 22px;border-bottom:1px solid var(--fog);position:relative}
.feature li:last-child{border-bottom:none}
.feature li::before{content:'';position:absolute;left:0;top:13px;width:10px;height:6px;border-left:1.5px solid var(--steel);border-bottom:1.5px solid var(--steel);transform:rotate(-45deg)}

/* ---------- Framework diagram ---------- */
.framework{max-width:960px;margin:40px auto 0}
.fw-row{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center;margin-bottom:20px}
.fw-agent{flex:1;min-width:180px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;text-align:center}
.fw-agent .ic-wrap{width:42px;height:42px;border-radius:8px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);margin:0 auto 12px}
.fw-agent h4{font-size:15px;margin-bottom:6px}
.fw-agent p{font-size:12.5px;color:var(--muted)}
.fw-arr{display:flex;align-items:center;color:var(--silver);padding:0 8px}
.fw-lead{background:var(--graphite);color:#fff;border-radius:var(--radius-lg);padding:26px;text-align:center;max-width:520px;margin:0 auto}
.fw-lead .ic-wrap{width:46px;height:46px;border-radius:9px;background:#22262c;border:1px solid #2f343b;color:#eef1f4;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.fw-lead h3{color:#fff;font-size:19px;margin-bottom:6px}
.fw-lead p{color:#9aa1ab;font-size:13px}

/* ---------- Roadmap ---------- */
.timeline{display:grid;gap:20px;margin-top:12px}
.phase{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;position:relative;overflow:hidden}
.phase-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.phase-num{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#fff;background:var(--ink);padding:4px 10px;border-radius:100px}
.phase-head h3{font-size:19px;flex:1}
.phase-dur{font-family:var(--sans);font-size:13px;color:var(--muted)}
.phase-track{height:4px;background:var(--fog);border-radius:100px;overflow:hidden;margin-bottom:18px}
.phase-fill{height:100%;background:var(--chrome-dark)}
.tasks{display:grid;gap:8px;margin-bottom:16px}
.task{display:flex;align-items:center;gap:10px;font-family:var(--sans);font-size:14px;color:var(--slate)}
.task .box{width:18px;height:18px;border-radius:4px;display:flex;align-items:center;justify-content:center;flex-shrink:0;border:1.5px solid var(--mist)}
.task.done .box{background:var(--ink);border-color:var(--ink);color:#fff}
.task.wip .box{border-color:var(--steel);color:var(--steel)}
.task .box svg{width:11px;height:11px;stroke-width:2.5}
.deliverable{font-family:var(--sans);font-size:13px;color:var(--steel);background:var(--fog);border-radius:6px;padding:11px 14px}
.deliverable b{color:var(--ink)}

/* ---------- ROI calculator ---------- */
.calc{max-width:840px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow)}
.calc h2{font-size:26px;margin-bottom:6px}
.calc > p{color:var(--slate);margin-bottom:26px;font-size:15px}
.calc-inputs{display:grid;gap:22px;margin-bottom:30px}
.calc-group label{display:block;font-family:var(--sans);font-size:13px;font-weight:600;color:var(--steel);margin-bottom:10px}
.calc-group input[type=range]{width:100%;-webkit-appearance:none;height:3px;background:var(--mist);border-radius:100px;outline:none}
.calc-group input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--ink);cursor:pointer;border:3px solid #fff;box-shadow:0 1px 4px rgba(0,0,0,.25)}
.calc-group input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--ink);cursor:pointer;border:3px solid #fff}
.calc-val{font-family:var(--serif);font-size:20px;color:var(--ink);margin-top:10px}
.calc-results{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.result{background:var(--fog);border:1px solid var(--line);border-radius:var(--radius-lg);padding:18px;text-align:center}
.result.lead{background:var(--ink);border-color:var(--ink)}
.result.lead .r-lbl{color:var(--silver)}
.result.lead .r-val{color:#fff}
.r-lbl{font-family:var(--sans);font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.r-val{font-family:var(--serif);font-size:23px;color:var(--ink);margin-top:6px}
.calc-note{max-width:840px;margin:20px auto 0;font-family:var(--sans);font-size:12px;color:var(--muted);text-align:center}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;margin-top:8px}
.contact-form h2{font-size:26px;margin-bottom:8px}
.contact-form > p{color:var(--slate);margin-bottom:24px;font-size:15px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-family:var(--sans);font-size:12.5px;font-weight:600;color:var(--steel);margin-bottom:6px}
.form-group input,.form-group textarea{width:100%;padding:12px 14px;border:1px solid var(--mist);border-radius:var(--radius);font-family:var(--sans);font-size:14px;color:var(--ink);background:#fff;transition:.15s}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--steel);box-shadow:0 0 0 3px rgba(43,47,54,.08)}
.form-group textarea{resize:vertical}
.info-cards{display:grid;gap:14px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;display:flex;gap:14px;align-items:flex-start}
.info-card .ic-wrap{width:40px;height:40px;border-radius:8px;background:var(--fog);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--steel);flex-shrink:0}
.info-card h3{font-family:var(--serif);font-size:15px;margin-bottom:3px}
.info-card p{font-family:var(--sans);font-size:13.5px;color:var(--slate);line-height:1.5}
.info-card a{color:var(--ink);font-weight:500}
.form-success{margin-top:16px;padding:15px;background:var(--ink);color:#fff;border-radius:var(--radius);font-family:var(--sans);font-size:14px;font-weight:500;display:none}
.form-error{margin-top:16px;padding:15px;background:#fbeaea;color:#8a2a24;border:1px solid #f0cfcd;border-radius:var(--radius);font-family:var(--sans);font-size:14px;display:none}
.btn.is-loading{opacity:.6;pointer-events:none}

/* ---------- Invitation band (reusable outreach) ---------- */
.invite{background:linear-gradient(180deg,var(--fog),var(--paper));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.invite-inner{display:grid;grid-template-columns:1.4fr .6fr;gap:40px;align-items:center}
.invite h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:12px}
.invite p{color:var(--slate);font-size:16px;max-width:40em}
.invite-actions{display:flex;flex-direction:column;gap:12px}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:#c3c8d0;padding:58px 0 30px}
.footer .logo-text{color:#fff}
.footer .logo-mark{background:var(--chrome)}
.footer .logo-mark svg{stroke:#16181c}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;margin-bottom:36px}
.footer-brand p{font-family:var(--sans);font-size:13.5px;color:var(--silver);margin-top:14px;max-width:30em;line-height:1.6}
.footer h4{font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--silver);margin-bottom:14px}
.footer ul{list-style:none}
.footer li{margin-bottom:9px}
.footer li a,.footer-contact p{font-family:var(--sans);font-size:13.5px;color:#c3c8d0;line-height:1.55}
.footer li a:hover{color:#fff}
.footer-contact p{margin-bottom:9px;display:flex;gap:9px;align-items:flex-start}
.footer-contact .ic{width:15px;height:15px;stroke:var(--silver);flex-shrink:0;margin-top:2px}
.footer-contact a{color:#fff}
.footer-bottom{border-top:1px solid #23262b;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-family:var(--sans);font-size:12px;color:var(--muted)}

/* ---------- Floating WhatsApp ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:200;width:54px;height:54px;border-radius:50%;background:var(--ink);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);transition:.2s;border:1px solid #2f343b}
.wa-float:hover{transform:translateY(-2px) scale(1.04);background:var(--steel)}
.wa-float svg{width:26px;height:26px;stroke:#fff;stroke-width:1.6;fill:none}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .hero-container,.contact-grid,.invite-inner{grid-template-columns:1fr;gap:34px}
  .grid-4,.metrics-grid,.calc-results{grid-template-columns:1fr 1fr}
  .agents,.footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:14px 20px;
    border-bottom:1px solid var(--line);gap:2px;transform:translateY(-140%);transition:.3s;box-shadow:var(--shadow)}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:12px 14px}
  .mobile-toggle{display:flex}
  .features,.framework{max-width:100%}
}
@media(max-width:560px){
  .grid-4,.metrics-grid,.calc-results,.features,.grid-2,.agents,.footer-grid{grid-template-columns:1fr}
  section{padding:56px 0}
  .console-flow{font-size:10px}
}

/* ---------- Plain-English layer ---------- */
.agent-plain{font-size:12.5px;color:var(--slate);background:var(--fog);border:1px solid var(--line);border-radius:6px;padding:9px 11px;margin-bottom:14px;line-height:1.5}
.agent-plain span{font-weight:600;color:var(--steel);text-transform:uppercase;font-size:10px;letter-spacing:.07em;display:block;margin-bottom:2px}
.agent.lead .agent-plain{background:#1f232a;border-color:#2a2e34;color:#c3c8d0}
.agent.lead .agent-plain span{color:var(--silver)}
.explainer{max-width:840px;margin:22px auto 0;background:var(--fog);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 26px}
.explainer h4{font-family:var(--serif);font-size:16.5px;margin-bottom:10px}
.explainer p{font-size:14px;color:var(--slate);line-height:1.62;margin-bottom:11px}
.explainer p b{color:var(--ink)}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:10px 26px;margin-top:8px;padding-top:14px;border-top:1px solid var(--line)}
.legend div{font-size:13px;color:var(--slate);line-height:1.5}
.legend b{color:var(--ink);font-weight:600}
.glossary{background:var(--fog);border-top:1px solid var(--line)}
.glossary-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px 36px;margin-top:28px;max-width:960px}
.gloss-term{font-family:var(--serif);font-size:15.5px;color:var(--ink);margin-bottom:3px}
.gloss-def{font-size:13.5px;color:var(--slate);line-height:1.55}
@media(max-width:700px){.legend,.glossary-grid{grid-template-columns:1fr}}