/* blueup — landing page
   Design system + components. Pure CSS, no build step. */

:root {
  --navy-900: #070c1c;
  --navy-800: #0b1226;
  --navy-700: #121b36;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --cyan-400: #22d3ee;
  --cyan-300: #67e8f9;
  --grad: linear-gradient(120deg, #3b82f6 0%, #06b6d4 100%);
  --grad-soft: linear-gradient(120deg, rgba(59,130,246,.12), rgba(6,182,212,.12));
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, .16);
  --maxw: 1140px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
section { padding: 84px 0; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--blue-600); margin-bottom: 14px;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; color: var(--ink); }
h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.section-head { max-width: 680px; margin: 0 auto 52px; text-align: center; }
.section-head p { color: var(--muted); font-size: 18px; margin-top: 14px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-weight: 700; font-size: 15px; padding: 13px 22px; border-radius: 999px;
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .2s ease, background .2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(37,99,235,.35); }
.btn-primary:hover { box-shadow: 0 12px 30px rgba(37,99,235,.45); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.22); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #1e293b; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50; backdrop-filter: blur(10px);
  background: rgba(7,12,28,.72); border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: #fff; letter-spacing: -.02em; }
.brand .dot { width: 26px; height: 26px; border-radius: 8px; background: var(--grad); display: grid; place-items: center; }
.brand .dot svg { width: 16px; height: 16px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: rgba(255,255,255,.78); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: #fff; }
.nav-cta { display: flex; gap: 12px; align-items: center; }

/* Hero */
.hero {
  position: relative; background: radial-gradient(1200px 600px at 80% -10%, rgba(34,211,238,.18), transparent 60%),
    radial-gradient(900px 500px at 10% 0%, rgba(59,130,246,.22), transparent 55%), var(--navy-900);
  color: #fff; padding: 72px 0 96px; overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; color: #fff; }
.hero h1 .hl { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 19px; color: rgba(255,255,255,.78); margin: 22px 0 30px; max-width: 540px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 22px; margin-top: 34px; flex-wrap: wrap; }
.hero-badge { display: flex; align-items: center; gap: 9px; color: rgba(255,255,255,.72); font-size: 14px; font-weight: 500; }
.hero-badge svg { width: 18px; height: 18px; color: var(--cyan-400); }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  font-size: 13px; font-weight: 600; color: rgba(255,255,255,.85); margin-bottom: 22px;
}
.pill .d { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 0 4px rgba(34,211,238,.25); }

/* Hero visual: mock storefront + chat */
.mock {
  background: linear-gradient(180deg, #0e1733, #0a1127); border: 1px solid rgba(255,255,255,.1);
  border-radius: 20px; box-shadow: var(--shadow-lg); overflow: hidden;
}
.mock-top { display: flex; align-items: center; gap: 7px; padding: 13px 16px; border-bottom: 1px solid rgba(255,255,255,.08); }
.mock-top i { width: 11px; height: 11px; border-radius: 50%; background: rgba(255,255,255,.22); display: inline-block; }
.mock-top .url { margin-left: 12px; font-size: 12px; color: rgba(255,255,255,.5); font-weight: 500; }
.mock-body { padding: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mock-card { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.07); border-radius: 12px; padding: 12px; }
.mock-card .ph { height: 74px; border-radius: 8px; background: linear-gradient(120deg, rgba(59,130,246,.3), rgba(34,211,238,.22)); margin-bottom: 10px; }
.mock-card .l1 { height: 9px; width: 80%; background: rgba(255,255,255,.18); border-radius: 4px; margin-bottom: 7px; }
.mock-card .l2 { height: 9px; width: 45%; background: rgba(255,255,255,.12); border-radius: 4px; }
.mock-chat {
  position: absolute; right: 22px; bottom: 22px; width: 268px; background: #fff; color: var(--ink);
  border-radius: 16px; box-shadow: var(--shadow-lg); overflow: hidden;
}
.mc-head { background: var(--grad); color: #fff; padding: 12px 14px; font-weight: 700; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.mc-head .av { width: 22px; height: 22px; border-radius: 7px; background: rgba(255,255,255,.25); display: grid; place-items: center; }
.mc-body { padding: 14px; display: flex; flex-direction: column; gap: 9px; }
.bub { font-size: 12.5px; padding: 9px 11px; border-radius: 12px; max-width: 86%; }
.bub.bot { background: #eef2fb; color: var(--ink-2); align-self: flex-start; border-bottom-left-radius: 4px; }
.bub.me { background: var(--blue-600); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.bub .src { display: block; margin-top: 5px; font-size: 10.5px; color: var(--blue-600); font-weight: 600; }
.mock-visual { position: relative; }

/* Trust strip */
.trust { background: var(--navy-800); padding: 30px 0; border-top: 1px solid rgba(255,255,255,.06); }
.trust .container { display: flex; align-items: center; justify-content: center; gap: 14px 34px; flex-wrap: wrap; }
.trust span.label { color: rgba(255,255,255,.5); font-size: 13px; font-weight: 600; }
.trust .chip { color: rgba(255,255,255,.82); font-weight: 700; font-size: 16px; letter-spacing: -.01em; opacity: .85; }

/* Steps */
.steps { background: var(--bg); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; position: relative; }
.step .num { width: 40px; height: 40px; border-radius: 12px; background: var(--grad); color: #fff; font-weight: 800; display: grid; place-items: center; margin-bottom: 16px; }
.step h3 { font-size: 20px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 15px; }

/* Features */
.features { background: var(--bg-alt); }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .2s ease; }
.feat:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feat .ic { width: 46px; height: 46px; border-radius: 12px; background: var(--grad-soft); display: grid; place-items: center; margin-bottom: 16px; color: var(--blue-600); }
.feat .ic svg { width: 24px; height: 24px; }
.feat h3 { font-size: 18px; margin-bottom: 8px; }
.feat p { color: var(--muted); font-size: 14.5px; }

/* LGPD */
.lgpd { background: var(--navy-900); color: #fff; }
.lgpd-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.lgpd h2 { color: #fff; }
.lgpd p.lead { color: rgba(255,255,255,.75); font-size: 18px; margin: 16px 0 26px; }
.lgpd ul { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.lgpd li { display: flex; gap: 12px; align-items: flex-start; color: rgba(255,255,255,.85); font-size: 15.5px; }
.lgpd li svg { width: 22px; height: 22px; color: var(--cyan-400); flex-shrink: 0; margin-top: 2px; }
.consent-demo { background: #0e1733; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; padding: 22px; box-shadow: var(--shadow-lg); }
.consent-demo .cd-head { font-weight: 700; margin-bottom: 8px; }
.consent-demo .cd-text { color: rgba(255,255,255,.6); font-size: 13.5px; margin-bottom: 16px; }
.consent-demo .cd-row { display: flex; gap: 10px; }
.consent-demo .cd-row .btn { font-size: 13px; padding: 10px 16px; }

/* AWS architecture */
.aws { background: var(--bg); }
.arch { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 10px; }
.arch .node { background: var(--bg-alt); border: 1px solid var(--line); border-radius: 12px; padding: 18px 14px; text-align: center; position: relative; }
.arch .node .k { font-size: 12px; color: var(--muted); font-weight: 600; }
.arch .node .v { font-size: 15px; font-weight: 800; margin-top: 4px; }
.arch .node .ic { width: 38px; height: 38px; margin: 0 auto 10px; border-radius: 10px; background: var(--grad-soft); display: grid; place-items: center; color: var(--blue-600); }
.arch .node .ic svg { width: 20px; height: 20px; }
.arch-note { text-align: center; color: var(--muted); font-size: 14px; margin-top: 22px; }

/* Pricing */
.pricing { background: var(--bg-alt); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.plan { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; }
.plan.popular { border: 2px solid var(--blue-500); box-shadow: var(--shadow-lg); position: relative; }
.plan.popular .tag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff; font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 999px; }
.plan h3 { font-size: 20px; }
.plan .price { font-size: 40px; font-weight: 800; margin: 12px 0 2px; }
.plan .price small { font-size: 15px; font-weight: 600; color: var(--muted); }
.plan .desc { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.plan ul { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; flex: 1; }
.plan li { font-size: 14.5px; color: var(--ink-2); display: flex; gap: 9px; align-items: flex-start; }
.plan li svg { width: 18px; height: 18px; color: var(--blue-600); flex-shrink: 0; margin-top: 3px; }

/* CTA */
.cta { background: var(--navy-900); color: #fff; text-align: center; }
.cta .box { background: var(--grad); border-radius: 28px; padding: 60px 40px; box-shadow: var(--shadow-lg); }
.cta h2 { color: #fff; }
.cta p { color: rgba(255,255,255,.9); font-size: 18px; margin: 14px 0 28px; }

/* Footer */
.footer { background: var(--navy-900); color: rgba(255,255,255,.6); padding: 54px 0 34px; border-top: 1px solid rgba(255,255,255,.08); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.footer h4 { color: #fff; font-size: 14px; margin-bottom: 14px; text-transform: uppercase; letter-spacing: .06em; }
.footer a { display: block; color: rgba(255,255,255,.6); font-size: 14px; margin-bottom: 9px; }
.footer a:hover { color: #fff; }
.footer .brand { color: #fff; margin-bottom: 14px; }
.footer .sub { font-size: 14px; max-width: 280px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; }

/* Floating chat widget */
#chat-launcher {
  position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 60px; height: 60px; border-radius: 50%;
  background: var(--grad); border: none; cursor: pointer; box-shadow: 0 12px 30px rgba(37,99,235,.45);
  display: grid; place-items: center; transition: transform .2s ease;
}
#chat-launcher:hover { transform: scale(1.06); }
#chat-launcher svg { width: 28px; height: 28px; color: #fff; }
#chat-panel {
  position: fixed; right: 22px; bottom: 94px; z-index: 91; width: 370px; max-width: calc(100vw - 32px);
  height: 540px; max-height: calc(100vh - 130px); background: #fff; border-radius: 18px;
  box-shadow: var(--shadow-lg); display: none; flex-direction: column; overflow: hidden; border: 1px solid var(--line);
}
#chat-panel.open { display: flex; animation: pop .18s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: none; } }
.cp-head { background: var(--grad); color: #fff; padding: 16px 18px; display: flex; align-items: center; gap: 11px; }
.cp-head .av { width: 34px; height: 34px; border-radius: 10px; background: rgba(255,255,255,.22); display: grid; place-items: center; }
.cp-head .av svg { width: 20px; height: 20px; }
.cp-head .t { font-weight: 700; font-size: 15px; }
.cp-head .s { font-size: 12px; opacity: .85; display: flex; align-items: center; gap: 6px; }
.cp-head .s .d { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 3px rgba(74,222,128,.3); }
.cp-head .x { margin-left: auto; cursor: pointer; opacity: .85; font-size: 20px; line-height: 1; background: none; border: none; color: #fff; }
.cp-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; background: #f8fafc; }
.msg { font-size: 14px; padding: 10px 13px; border-radius: 13px; max-width: 85%; white-space: pre-wrap; line-height: 1.5; }
.msg.bot { background: #fff; border: 1px solid var(--line); color: var(--ink-2); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.me { background: var(--blue-600); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.msg .cite { display: inline-block; margin-top: 6px; font-size: 11.5px; color: var(--blue-600); font-weight: 600; background: var(--grad-soft); padding: 2px 8px; border-radius: 6px; }
.typing { display: inline-flex; gap: 4px; padding: 12px 14px; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: #cbd5e1; animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }
.cp-quick { display: flex; gap: 7px; padding: 0 14px 10px; flex-wrap: wrap; background: #f8fafc; }
.cp-quick button { font-size: 12.5px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); cursor: pointer; }
.cp-quick button:hover { border-color: var(--blue-500); color: var(--blue-600); }
.cp-foot { border-top: 1px solid var(--line); padding: 12px; display: flex; gap: 9px; background: #fff; }
.cp-foot input { flex: 1; border: 1px solid var(--line); border-radius: 999px; padding: 11px 15px; font-size: 14px; outline: none; font-family: var(--font); }
.cp-foot input:focus { border-color: var(--blue-500); }
.cp-foot button { width: 42px; height: 42px; border-radius: 50%; background: var(--grad); border: none; cursor: pointer; display: grid; place-items: center; flex-shrink: 0; }
.cp-foot button svg { width: 19px; height: 19px; color: #fff; }
.cp-foot button:disabled { opacity: .5; cursor: not-allowed; }
.cp-disclaimer { font-size: 10.5px; color: var(--muted); text-align: center; padding: 0 12px 10px; background: #fff; }

/* LGPD consent banner */
#consent {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 95;
  width: calc(100% - 40px); max-width: 760px; background: #fff; border: 1px solid var(--line);
  border-radius: 16px; box-shadow: var(--shadow-lg); padding: 20px 22px; display: none;
}
#consent.show { display: block; animation: pop .25s ease; }
#consent .c-grid { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
#consent .c-text { flex: 1; min-width: 260px; }
#consent .c-text strong { display: block; font-size: 15px; margin-bottom: 4px; }
#consent .c-text p { font-size: 13px; color: var(--muted); }
#consent .c-text a { color: var(--blue-600); font-weight: 600; }
#consent .c-actions { display: flex; gap: 10px; }
#consent .btn { font-size: 14px; padding: 11px 18px; }
.btn-outline { background: #fff; border: 1px solid var(--line); color: var(--ink-2); }
.btn-outline:hover { border-color: var(--blue-500); color: var(--blue-600); }

/* Demo request page */
.demo-page { background: var(--bg-alt); min-height: 100vh; }
.demo-wrap { max-width: 960px; margin: 0 auto; padding: 56px 20px 80px; }
.demo-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.demo-intro .eyebrow { color: var(--blue-600); }
.demo-intro h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin-bottom: 14px; }
.demo-intro p { color: var(--muted); font-size: 17px; margin-bottom: 26px; }
.demo-intro ul { list-style: none; display: flex; flex-direction: column; gap: 13px; }
.demo-intro li { display: flex; gap: 11px; align-items: flex-start; font-size: 15.5px; color: var(--ink-2); }
.demo-intro li svg { width: 22px; height: 22px; color: var(--blue-600); flex-shrink: 0; margin-top: 2px; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.form-card h2 { font-size: 22px; margin-bottom: 6px; }
.form-card .sub { color: var(--muted); font-size: 14.5px; margin-bottom: 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--ink-2); margin-bottom: 6px; }
.field label .req { color: #e11d48; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
  font-size: 15px; font-family: var(--font); color: var(--ink); outline: none; background: #fff;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.field textarea { resize: vertical; min-height: 92px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-card .btn { width: 100%; justify-content: center; font-size: 16px; padding: 15px; margin-top: 6px; }
.form-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: 12px; }
.form-msg { border-radius: 10px; padding: 13px 15px; font-size: 14.5px; margin-top: 14px; display: none; }
.form-msg.show { display: block; }
.form-msg.ok { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.form-msg.err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.form-success { display: none; text-align: center; padding: 20px 0; }
.form-success.show { display: block; }
.form-success .ic { width: 64px; height: 64px; border-radius: 50%; background: #ecfdf5; display: grid; place-items: center; margin: 0 auto 18px; }
.form-success .ic svg { width: 34px; height: 34px; color: #10b981; }
.form-success h2 { font-size: 22px; margin-bottom: 8px; }
.form-success p { color: var(--muted); font-size: 15.5px; }
.demo-back { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 14px; font-weight: 600; margin-bottom: 26px; }
.demo-back:hover { color: var(--blue-600); }

@media (max-width: 800px) {
  .demo-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* Legal pages (privacy / terms) */
.legal-page { background: var(--bg); }
.legal-wrap { max-width: 820px; margin: 0 auto; padding: 56px 20px 80px; }
.legal-wrap .demo-back { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 14px; font-weight: 600; margin-bottom: 22px; }
.legal-wrap .demo-back:hover { color: var(--blue-600); }
.legal-wrap h1 { font-size: clamp(28px, 4vw, 38px); font-weight: 800; margin-bottom: 8px; }
.legal-wrap .updated { color: var(--muted); font-size: 14px; margin-bottom: 36px; }
.legal-wrap h2 { font-size: 20px; font-weight: 700; margin: 34px 0 10px; }
.legal-wrap p { color: var(--ink-2); font-size: 15.5px; margin-bottom: 14px; }
.legal-wrap ul { margin: 0 0 14px 20px; }
.legal-wrap li { color: var(--ink-2); font-size: 15.5px; margin-bottom: 8px; }
.legal-wrap a { color: var(--blue-600); font-weight: 600; }
.legal-foot { border-top: 1px solid var(--line); margin-top: 44px; padding-top: 22px; display: flex; gap: 20px; flex-wrap: wrap; font-size: 14px; }
.legal-foot a { color: var(--muted); font-weight: 600; }
.legal-foot a:hover { color: var(--blue-600); }

/* Responsive */
@media (max-width: 920px) {
  .hero-grid, .lgpd-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .steps-grid, .feat-grid, .price-grid { grid-template-columns: 1fr; }
  .arch { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 520px) {
  section { padding: 60px 0; }
  .arch { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .mock-chat { position: static; width: 100%; margin-top: 16px; }
}