/* Layout concept: a systems-integration "stack" — pages read as layered bands (edge → network → compute → security → AI), with a rack-unit grid and status-light details. */
:root {
  --paper: #f5f8fc;
  --surface: #ffffff;
  --ink: #0e1c34;
  --muted: #51607a;
  --line: #d8e1ee;
  --blue: #2c67d1;
  --sky: #3f98e6;
  --blue-soft: #e6effc;
  --signal: #e8962a;
  --ok: #1f9d6b;
  --band: #0e1c34;
  --band-fg: #e8eef8;
  --band-muted: #9fb0cc;
  --band-line: #22365a;
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap: 1180px;
  --r: 6px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #09121f; --surface: #0f1b2e; --ink: #e5ecf7; --muted: #9aabc6; --line: #1e2f4b;
    --blue: #6aa3ff; --sky: #5cb4f5; --blue-soft: #13284a; --signal: #f2ad4e; --ok: #3cc58e;
    --band: #050b15; --band-fg: #e5ecf7; --band-muted: #8ea1c0; --band-line: #1a2b47;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #09121f; --surface: #0f1b2e; --ink: #e5ecf7; --muted: #9aabc6; --line: #1e2f4b;
  --blue: #6aa3ff; --sky: #5cb4f5; --blue-soft: #13284a; --signal: #f2ad4e; --ok: #3cc58e;
  --band: #050b15; --band-fg: #e5ecf7; --band-muted: #8ea1c0; --band-line: #1a2b47;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 60; background: var(--surface); }
img { max-width: 100%; height: auto; }
a { color: var(--blue); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; border-radius: 3px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; text-wrap: balance; margin: 0; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.9rem); font-weight: 800; font-stretch: 92%; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); font-weight: 750; }
h3 { font-size: 1.22rem; font-weight: 700; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.eyebrow { font: 500 0.78rem/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue); display: inline-flex; align-items: center; gap: 0.6em; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 22%, transparent); }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 100; }
.skip:focus { left: 16px; }

/* Header */
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: color-mix(in srgb, var(--surface) 94%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 800 1.08rem/1 var(--display); letter-spacing: 0.02em; white-space: nowrap; }
.brand img { width: 44px; height: auto; }
.brand span b { color: var(--blue); font-weight: 800; }
.site-header .wrap { max-width: 1360px; }
.nav-links { display: flex; gap: 2px; margin-left: auto; list-style: none; padding: 0; margin-block: 0; flex-wrap: nowrap; white-space: nowrap; }
.nav-links a { display: block; padding: 8px 10px; color: var(--ink); text-decoration: none; font-size: 0.9rem; font-weight: 500; border-radius: var(--r); }
.nav-links a:hover, .nav-links a[aria-current="page"] { background: var(--blue-soft); color: var(--blue); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: var(--r); font: 600 0.96rem/1 var(--body); text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, background .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; }
:root[data-theme="dark"] .btn-primary { color: #071224; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #071224; } }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.nav .btn { padding: 10px 16px; font-size: 0.9rem; }
.menu-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: var(--r); padding: 8px 12px; font: 500 0.9rem var(--body); cursor: pointer; }
@media (max-width: 1240px) {
  .menu-toggle { display: inline-block; }
  .nav { flex-wrap: wrap; }
  .nav-links, .nav .btn { display: none; }
  .nav.open .nav-links { display: flex; flex-direction: column; width: 100%; margin: 0 0 12px; }
  .nav.open .btn { display: inline-flex; margin-bottom: 14px; }
}

/* Hero */
.hero { padding-block: clamp(48px, 8vw, 96px) clamp(40px, 6vw, 72px); background:
  linear-gradient(color-mix(in srgb, var(--line) 45%, transparent) 1px, transparent 1px) 0 0 / 100% 44px,
  var(--paper); background-blend-mode: normal; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero h1 { margin: 18px 0 20px; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.hero-proof { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 36px; padding-top: 22px; border-top: 1px dashed var(--line); font: 500 0.82rem/1.4 var(--mono); color: var(--muted); }
.hero-proof b { display: block; font: 700 1.5rem/1.1 var(--display); color: var(--ink); }
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; } }

/* Stack diagram — the integrator's signature */
.stack { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px; box-shadow: 0 30px 60px -40px color-mix(in srgb, var(--blue) 55%, transparent); }
.stack-head { display: flex; justify-content: space-between; font: 500 0.74rem/1 var(--mono); color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 4px 14px; }
.stack-head span:last-child { color: var(--ok); }
.layer { display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r); text-decoration: none; color: var(--ink); background: var(--paper); transition: border-color .15s, transform .15s; }
.layer + .layer { margin-top: 8px; }
.layer:hover { border-color: var(--blue); transform: translateX(4px); }
.layer .u { font: 500 0.7rem/1 var(--mono); color: var(--muted); }
.layer strong { display: block; font: 700 0.98rem/1.2 var(--display); }
.layer small { display: block; color: var(--muted); font-size: 0.8rem; line-height: 1.35; margin-top: 2px; }
.led { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); animation: blink 2.6s infinite; }
.layer:nth-child(3) .led { animation-delay: .4s; } .layer:nth-child(4) .led { animation-delay: .9s; } .layer:nth-child(5) .led { animation-delay: 1.3s; } .layer:nth-child(6) .led { animation-delay: 1.8s; } .layer:nth-child(7) .led { animation-delay: 2.2s; }
.led.amber { background: var(--signal); }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* Sections */
section { padding-block: clamp(56px, 8vw, 96px); }
.section-head { display: grid; gap: 14px; margin-bottom: 40px; max-width: 760px; }
.services-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.svc { background: var(--surface); padding: 30px 28px 28px; display: flex; flex-direction: column; gap: 12px; text-decoration: none; color: var(--ink); transition: background .15s; min-width: 0; }
.svc:hover { background: var(--blue-soft); }
.svc:first-child, .svc:last-child { grid-column: span 2; }
@media (max-width: 960px) { .svc:last-child { grid-column: auto; } }
.svc .code { font: 500 0.75rem/1 var(--mono); color: var(--blue); letter-spacing: 0.08em; }
.svc p { color: var(--muted); font-size: 0.97rem; }
.svc ul { margin: 4px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.svc li { font: 500 0.75rem/1 var(--mono); padding: 6px 8px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: var(--paper); }
.svc .more { margin-top: auto; padding-top: 8px; font-weight: 600; color: var(--blue); font-size: 0.93rem; }
@media (max-width: 960px) { .services-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .services-grid { grid-template-columns: 1fr; } .svc:first-child, .svc:last-child { grid-column: auto; } }

/* Dark band */
.band { background: var(--band); color: var(--band-fg); }
.band .lede, .band p { color: var(--band-muted); }
.band .eyebrow { color: var(--sky); }
.band h2, .band h3 { color: var(--band-fg); }
.lifecycle { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--band-line); counter-reset: step; }
.lifecycle li { list-style: none; padding: 26px 22px 6px 0; border-right: 1px solid var(--band-line); margin-right: 22px; min-width: 0; }
.lifecycle li:last-child { border-right: 0; margin-right: 0; }
.lifecycle li::before { counter-increment: step; content: "PHASE 0" counter(step); display: block; font: 500 0.72rem/1 var(--mono); letter-spacing: 0.1em; color: var(--sky); margin-bottom: 14px; }
.lifecycle h3 { font-size: 1.1rem; margin-bottom: 8px; }
.lifecycle p { font-size: 0.93rem; }
.lifecycle ol, ol.lifecycle { padding: 0; margin: 0; }
@media (max-width: 900px) { .lifecycle { grid-template-columns: 1fr 1fr; } .lifecycle li { border-right: 0; margin-right: 0; border-bottom: 1px solid var(--band-line); padding-bottom: 22px; } }
@media (max-width: 520px) { .lifecycle { grid-template-columns: 1fr; } }

/* Why us */
.split { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.facts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.fact { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.fact dt { font: 600 0.78rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--blue); }
.fact dd { margin: 0; color: var(--muted); }
.fact dd strong { color: var(--ink); }
@media (max-width: 520px) { .fact { grid-template-columns: 1fr; gap: 6px; } }

/* Tech strip */
.tech { display: flex; flex-wrap: wrap; gap: 10px; }
.tech span { font: 500 0.85rem/1 var(--mono); padding: 10px 14px; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); color: var(--ink); }

/* SLA table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: 0.95rem; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { font: 600 0.78rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); background: var(--paper); }
tbody th { font-weight: 600; }
td { color: var(--muted); font-variant-numeric: tabular-nums; }
tr:last-child th, tr:last-child td { border-bottom: 0; }
.pill { display: inline-block; font: 600 0.72rem/1 var(--mono); padding: 5px 8px; border-radius: 99px; background: var(--blue-soft); color: var(--blue); }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 860px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 4px 22px; }
.faq summary { cursor: pointer; font: 700 1.04rem/1.4 var(--display); padding: 16px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; font: 500 1.3rem/1 var(--mono); color: var(--blue); }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); padding-bottom: 18px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: clamp(28px, 5vw, 64px); }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
form.enquiry { color: var(--ink); display: grid; grid-template-columns: 1fr 1fr; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: clamp(20px, 3vw, 32px); }
form.enquiry .full { grid-column: 1 / -1; }
@media (max-width: 560px) { form.enquiry { grid-template-columns: 1fr; } }
label { display: grid; gap: 6px; font: 600 0.86rem/1.3 var(--body); }
input, select, textarea { font: 400 1rem/1.4 var(--body); padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r); background: var(--paper); color: var(--ink); width: 100%; }
textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 0.85rem; color: var(--muted); }
.form-status { font-weight: 600; color: var(--ok) !important; }
.contact-list { display: grid; gap: 18px; margin-top: 28px; }
.contact-list div { display: grid; gap: 2px; }
.contact-list dt { font: 600 0.75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.contact-list dd { margin: 0; font-weight: 600; user-select: all; }

/* Service page */
.crumbs { font: 500 0.82rem/1.4 var(--mono); color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0 0 18px; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--line); }
.crumbs a { color: var(--muted); }
.page-hero { padding-block: clamp(44px, 7vw, 80px) clamp(36px, 5vw, 56px); border-bottom: 1px solid var(--line); background: linear-gradient(color-mix(in srgb, var(--line) 45%, transparent) 1px, transparent 1px) 0 0 / 100% 44px, var(--paper); }
.page-hero h1 { font-size: clamp(2rem, 4.4vw, 3.3rem); margin-bottom: 18px; max-width: 20ch; }
.cap-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 760px) { .cap-grid { grid-template-columns: 1fr; } }
.cap { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 26px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.cap .tag { font: 500 0.72rem/1 var(--mono); color: var(--blue); letter-spacing: 0.1em; text-transform: uppercase; }
.cap p { color: var(--muted); font-size: 0.97rem; }
.cap ul { margin: 4px 0 0; padding-left: 18px; color: var(--muted); font-size: 0.94rem; display: grid; gap: 4px; }
.outcomes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.outcomes div { border-top: 2px solid var(--sky); padding-top: 16px; display: grid; gap: 8px; }
@media (max-width: 760px) { .outcomes { grid-template-columns: 1fr; } }
.related { display: flex; flex-wrap: wrap; gap: 10px; }

/* CTA + footer */
.cta { background: var(--blue); color: #fff; border-radius: 12px; padding: clamp(28px, 5vw, 48px); display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.cta h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2.1rem); max-width: 26ch; }
.cta .btn { background: #fff; color: #10306b; }
:root[data-theme="dark"] .cta { background: #1b4fae; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .cta { background: #1b4fae; } }
.site-footer { background: var(--band); color: var(--band-muted); padding-block: 56px 28px; font-size: 0.93rem; }
.foot-grid { display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 32px; }
@media (max-width: 820px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .foot-grid { grid-template-columns: 1fr; } }
.site-footer h3 { font: 600 0.78rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: var(--band-fg); margin-bottom: 14px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.site-footer a { color: var(--band-muted); text-decoration: none; }
.site-footer a:hover { color: var(--band-fg); }
.site-footer .brand { color: var(--band-fg); margin-bottom: 14px; }
.foot-base { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--band-line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font: 400 0.8rem/1.5 var(--mono); }
.stack-gap { display: grid; gap: 18px; }

/* AI use cases */
.uc-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.uc { background: var(--surface); padding: 24px; display: grid; gap: 8px; align-content: start; min-width: 0; }
.uc .tag { font: 500 0.72rem/1 var(--mono); color: var(--blue); letter-spacing: 0.1em; text-transform: uppercase; }
.uc h3 { font-size: 1.08rem; }
.uc p { color: var(--muted); font-size: 0.94rem; }
@media (max-width: 960px) { .uc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .uc-grid { grid-template-columns: 1fr; } }
.facts.dev .fact { grid-template-columns: 190px minmax(0, 1fr); }
@media (max-width: 520px) { .facts.dev .fact { grid-template-columns: 1fr; } }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* WhatsApp chat */
:root { --wa: #1a8f4c; --wa-fg: #ffffff; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --wa: #25a35a; --wa-fg: #04140a; } }
:root[data-theme="dark"] { --wa: #25a35a; --wa-fg: #04140a; }
.wa { position: fixed; z-index: 70; right: calc(16px + env(safe-area-inset-right, 0px)); bottom: calc(16px + env(safe-area-inset-bottom, 0px)); display: grid; justify-items: end; gap: 10px; }
.wa-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 18px 12px 14px; border-radius: 999px; background: var(--wa); color: var(--wa-fg); font: 600 0.95rem/1 var(--body); text-decoration: none; box-shadow: 0 10px 28px -10px rgba(0,0,0,.45); transition: transform .15s; }
.wa-btn:hover { transform: translateY(-2px); }
.wa-prompt { position: relative; width: min(300px, calc(100vw - 32px)); background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; box-shadow: 0 18px 40px -18px rgba(0,0,0,.4); display: grid; gap: 8px; font-size: 0.93rem; animation: wa-in .3s ease-out; }
.wa-prompt p { color: var(--muted); }
.wa-prompt .wa-title { color: var(--ink); font: 700 1rem/1.3 var(--display); padding-right: 22px; }
.wa-go { justify-self: start; margin-top: 4px; color: var(--wa); font-weight: 600; text-decoration: none; }
.wa-go::after { content: " →"; }
.wa-close { position: absolute; top: 8px; right: 10px; border: 0; background: none; color: var(--muted); font-size: 1.3rem; line-height: 1; cursor: pointer; padding: 4px; }
@keyframes wa-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.wa-inline { color: inherit; }
.band .wa-inline { color: var(--band-fg); }
@media (max-width: 520px) { .wa-btn span { display: none; } .wa-btn { padding: 14px; } }
.site-footer { padding-bottom: 96px; }