/* SentriqMesh website. Hand-written, no framework, no external fonts or scripts (see website/README.md). */

:root {
  --bg: #070b14;
  --bg-2: #0c1322;
  --panel: #111a2c;
  --panel-2: #16213a;
  --line: #22304d;
  --text: #c9d4e5;
  --muted: #8796b0;
  --white: #f5f8fc;
  --accent: #10b981;
  --accent-2: #34d399;
  --accent-ink: #022c22;
  --red: #ef4444;
  --amber: #f59e0b;
  --violet: #8b5cf6;
  --sky: #38bdf8;
  --radius: 16px;
  --shadow: 0 20px 60px -20px rgb(0 0 0 / 0.6);
  --max: 1180px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--accent-2); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--white); }
h1, h2, h3 { color: var(--white); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--white); color: #000; padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }

.wrap { width: min(var(--max), 100% - 32px); margin-inline: auto; }
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section.alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--accent-2); font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 14px; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgb(16 185 129 / 0.18); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--text); max-width: 62ch; }
.muted { color: var(--muted); }
.center { text-align: center; }
.center .lead { margin-inline: auto; }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head.center { margin-inline: auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 999px;
  font-weight: 650; font-size: 0.98rem; text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease; white-space: nowrap; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-2); color: var(--accent-ink); }
.btn-ghost { border-color: var(--line); color: var(--white); background: rgb(255 255 255 / 0.03); }
.btn-ghost:hover { border-color: var(--muted); color: var(--white); }
.btn-small { padding: 8px 14px; font-size: 0.9rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgb(7 11 20 / 0.82); backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid rgb(34 48 77 / 0.7); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--white); font-weight: 750; font-size: 1.12rem;
  letter-spacing: -0.01em; text-decoration: none; }
.brand-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgb(16 185 129 / 0.2); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a:not(.btn) { color: var(--text); text-decoration: none; font-size: 0.94rem; padding: 8px 10px; border-radius: 8px; }
.nav a:not(.btn):hover { color: var(--white); background: rgb(255 255 255 / 0.05); }
.nav .btn { margin-left: 6px; }
.menu { display: none; }
.menu summary { list-style: none; cursor: pointer; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--white); font-weight: 600; }
.menu summary::-webkit-details-marker { display: none; }
.menu-panel { position: absolute; right: 16px; top: 62px; width: min(320px, calc(100vw - 32px)); background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 10px; box-shadow: var(--shadow); display: grid; gap: 2px; }
.menu-panel a { color: var(--white); text-decoration: none; padding: 10px 12px; border-radius: 8px; }
.menu-panel a:hover { background: var(--panel-2); }
.menu-panel .btn { margin-top: 6px; }
@media (max-width: 960px) {
  .nav { display: none; }
  .menu { display: block; }
}

/* Hero */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 8vw, 104px) 0 clamp(64px, 8vw, 96px); }
.hero::before { content: ""; position: absolute; inset: -40% -10% auto; height: 900px; pointer-events: none;
  background: radial-gradient(closest-side, rgb(16 185 129 / 0.16), transparent 70%) 70% 30% / 60% 70% no-repeat,
              radial-gradient(closest-side, rgb(56 189 248 / 0.10), transparent 70%) 10% 10% / 50% 60% no-repeat; }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero h1 span { color: var(--accent-2); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 30px; }
.trust { display: flex; flex-wrap: wrap; gap: 10px 18px; padding: 0; margin: 0; list-style: none; color: var(--muted); font-size: 0.92rem; }
.trust li { display: inline-flex; align-items: center; gap: 8px; }
.trust li::before { content: "✓"; color: var(--accent-2); font-weight: 800; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Hero visual: a camera view with a zone, a detection, a phone notification and a control-room card */
.scene { position: relative; aspect-ratio: 16 / 11; }
.camera { position: absolute; inset: 0 6% 12% 0; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #050a12; }
.camera svg { width: 100%; height: 100%; }
.cam-label { position: absolute; top: 12px; left: 14px; font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; color: #d1e3ff;
  background: rgb(0 0 0 / 0.55); padding: 6px 8px; border-radius: 6px; letter-spacing: 0.04em; }
.cam-rec { position: absolute; top: 12px; right: 14px; display: inline-flex; align-items: center; gap: 6px; font: 700 11px/1 ui-monospace, monospace;
  color: #fecaca; background: rgb(0 0 0 / 0.55); padding: 6px 8px; border-radius: 6px; }
.cam-rec::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--red); animation: blink 1.4s infinite; }
.notify { position: absolute; top: -4%; right: 0; width: min(300px, 62%); background: rgb(22 33 58 / 0.94); border: 1px solid #2c3d63;
  border-radius: 16px; padding: 12px 14px; box-shadow: var(--shadow); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.notify-top { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--muted); margin-bottom: 4px; }
.notify-top b { color: var(--white); font-weight: 650; display: inline-flex; gap: 6px; align-items: center; }
.notify-top b::before { content: ""; width: 14px; height: 14px; border-radius: 4px; background: var(--accent); }
.notify strong { display: block; color: var(--white); font-size: 0.92rem; }
.notify span { font-size: 0.82rem; color: var(--text); }
.card-mock { position: absolute; right: 0; bottom: 0; width: min(330px, 70%); background: var(--panel); border: 1px solid var(--line);
  border-radius: 16px; overflow: hidden; box-shadow: var(--shadow); outline: 2px solid rgb(239 68 68 / 0.75); }
.card-mock .bar { display: flex; justify-content: space-between; align-items: center; padding: 10px 12px 0; }
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 0.68rem; font-weight: 800; letter-spacing: 0.05em; padding: 3px 7px; border-radius: 6px; text-transform: uppercase; }
.badge.red { background: var(--red); color: #fff; }
.badge.amber { background: var(--amber); color: #1c1300; }
.badge.slate { background: #23314f; color: var(--text); }
.badge.violet { background: var(--violet); color: #fff; }
.card-mock .body { padding: 8px 12px 12px; font-size: 0.82rem; }
.card-mock .row { display: flex; justify-content: space-between; gap: 8px; }
.card-mock .name { color: var(--white); font-weight: 700; font-size: 0.95rem; }
.card-mock .mono { font-family: ui-monospace, monospace; color: var(--muted); font-size: 0.78rem; }
.card-mock .ai { margin-top: 6px; color: var(--text); font-size: 0.78rem; }
.card-mock .actions { display: flex; justify-content: flex-end; margin-top: 8px; }
.card-mock .ack { background: var(--amber); color: #1c1300; font-weight: 750; font-size: 0.78rem; padding: 6px 10px; border-radius: 7px; }
@keyframes blink { 50% { opacity: 0.25; } }
@keyframes pulse-ring { 0% { box-shadow: 0 0 0 0 rgb(239 68 68 / 0.55); } 100% { box-shadow: 0 0 0 18px rgb(239 68 68 / 0); } }
.card-mock { animation: pulse-ring 2.2s infinite; }
@media (max-width: 560px) {  /* phones: the card goes under the camera picture, so the person stays visible */
  .scene { aspect-ratio: auto; display: grid; gap: 14px; padding-top: 18px; }
  .camera { position: relative; inset: auto; aspect-ratio: 16 / 10; }
  .notify { top: 0; right: 8px; width: 74%; padding: 9px 12px; }
  .card-mock { position: relative; width: 100%; }
}

/* Logos strip / stats */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.fact { background: var(--bg-2); padding: 22px 20px; }
.fact b { display: block; color: var(--white); font-size: 1.6rem; letter-spacing: -0.02em; }
.fact span { color: var(--muted); font-size: 0.9rem; }
@media (max-width: 760px) { .facts { grid-template-columns: repeat(2, 1fr); } }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px 22px; }
.step::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 18px; right: 20px; color: #2a3a5c; font-weight: 800; font-size: 1.6rem; }
.step .icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px; background: rgb(16 185 129 / 0.12); color: var(--accent-2); }
.step .icon svg { width: 22px; height: 22px; }
.step p { margin: 0; font-size: 0.95rem; }
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* Audiences */
.audiences { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.audience { background: linear-gradient(180deg, var(--panel), var(--bg-2)); border: 1px solid var(--line); border-radius: 20px; padding: 28px 24px; display: flex; flex-direction: column; }
.audience .tag { align-self: flex-start; font-size: 0.75rem; font-weight: 750; letter-spacing: 0.08em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; margin-bottom: 16px; }
.tag.sky { background: rgb(56 189 248 / 0.12); color: var(--sky); }
.tag.violet { background: rgb(139 92 246 / 0.15); color: #c4b5fd; }
.tag.green { background: rgb(16 185 129 / 0.12); color: var(--accent-2); }
.audience h3 { font-size: 1.35rem; }
.ticks { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 10px; font-size: 0.95rem; }
.ticks li { display: grid; grid-template-columns: 20px 1fr; gap: 8px; }
.ticks li::before { content: "✓"; color: var(--accent-2); font-weight: 800; }
.audience .more { margin-top: auto; padding-top: 22px; }
@media (max-width: 980px) { .audiences { grid-template-columns: 1fr; } }

/* Feature split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.split.reverse > :first-child { order: 2; }
@media (max-width: 900px) { .split, .split.reverse { grid-template-columns: 1fr; } .split.reverse > :first-child { order: 0; } }
.feature-list { display: grid; gap: 16px; margin-top: 8px; }
.feature { display: grid; grid-template-columns: 40px 1fr; gap: 14px; }
.feature .icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--panel); border: 1px solid var(--line); color: var(--accent-2); }
.feature .icon svg { width: 20px; height: 20px; }
.feature h3 { margin: 2px 0 4px; font-size: 1.02rem; }
.feature p { margin: 0; font-size: 0.95rem; color: var(--text); }

/* Panels used as illustrations */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 22px; box-shadow: var(--shadow); }
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.timeline li { display: grid; grid-template-columns: 64px 18px 1fr; gap: 12px; align-items: start; padding: 10px 0; }
.timeline time { font: 600 0.82rem/1.5 ui-monospace, monospace; color: var(--muted); text-align: right; }
.timeline .dot { width: 12px; height: 12px; border-radius: 50%; margin-top: 5px; background: var(--accent); box-shadow: 0 0 0 4px rgb(16 185 129 / 0.15); }
.timeline .dot.red { background: var(--red); box-shadow: 0 0 0 4px rgb(239 68 68 / 0.15); }
.timeline .dot.amber { background: var(--amber); box-shadow: 0 0 0 4px rgb(245 158 11 / 0.15); }
.timeline .dot.sky { background: var(--sky); box-shadow: 0 0 0 4px rgb(56 189 248 / 0.15); }
.timeline b { color: var(--white); font-weight: 650; }
.timeline span { display: block; font-size: 0.88rem; color: var(--muted); }
.ledger { font: 0.8rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--text); }
.ledger .file { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--line); }
.ledger .file:last-child { border-bottom: 0; }
.ledger .hash { color: var(--accent-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 52%; }
.ledger .seal { margin-top: 14px; display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; background: rgb(139 92 246 / 0.12); color: #ddd6fe; font-family: system-ui, sans-serif; font-size: 0.86rem; }

/* AI callout */
.ai-box { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: center; background: linear-gradient(135deg, rgb(239 68 68 / 0.10), rgb(17 26 44 / 0.9) 45%);
  border: 1px solid #3a2333; border-radius: 22px; padding: clamp(24px, 4vw, 40px); }
.ai-banner { background: var(--red); color: #fff; font-weight: 800; font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; padding: 8px 12px; border-radius: 8px; animation: blink 1.8s infinite; }
@media (max-width: 860px) { .ai-box { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

/* Setup */
.kit { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.kit-item { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.kit-item b { color: var(--white); display: block; margin-bottom: 6px; }
.kit-item p { margin: 0; font-size: 0.92rem; }
.kit-item .opt { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 700; }
@media (max-width: 900px) { .kit { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .kit { grid-template-columns: 1fr; } }

/* FAQ */
.faq { max-width: 820px; margin-inline: auto; display: grid; gap: 10px; }
.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
.faq summary { cursor: pointer; list-style: none; padding: 14px 0; color: var(--white); font-weight: 650; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-2); font-weight: 800; font-size: 1.2rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 16px; }

/* Contact */
.contact { display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(24px, 4vw, 48px); align-items: start; }
@media (max-width: 900px) { .contact { grid-template-columns: 1fr; } }
.form { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: clamp(20px, 3.4vw, 32px); display: grid; gap: 16px; }
.form .two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form .two { grid-template-columns: 1fr; } }
.form label, .form legend { display: grid; gap: 6px; font-size: 0.9rem; font-weight: 600; color: var(--white); }
.form .opt { color: var(--muted); font-weight: 500; }
.form input[type=text], .form input[type=email], .form input[type=tel], .form textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--white); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 11px 12px; }
.form input::placeholder, .form textarea::placeholder { color: #5f6f8c; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgb(16 185 129 / 0.2); }
.form textarea { min-height: 130px; resize: vertical; }
.form fieldset { border: 0; padding: 0; margin: 0; }
.kinds { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 6px; }
@media (max-width: 640px) { .kinds { grid-template-columns: repeat(2, 1fr); } }
.kinds label { position: relative; display: flex; cursor: pointer; }
.kinds input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.kinds span { flex: 1; display: flex; align-items: center; justify-content: center; text-align: center; padding: 10px 8px; border: 1px solid var(--line); border-radius: 10px; font-size: 0.86rem; font-weight: 600; color: var(--text); background: var(--bg); }
.kinds input:checked + span { border-color: var(--accent); background: rgb(16 185 129 / 0.12); color: var(--white); }
.kinds input:focus-visible + span { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.consent { display: grid !important; grid-template-columns: 20px 1fr; gap: 10px !important; font-weight: 500 !important; color: var(--text) !important; font-size: 0.88rem !important; }
.consent input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--accent); }
.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.form-status { border-radius: 10px; padding: 12px 14px; font-size: 0.95rem; }
.form-status[hidden] { display: none; }
.form-status.ok { background: rgb(16 185 129 / 0.12); border: 1px solid rgb(16 185 129 / 0.4); color: #a7f3d0; }
.form-status.err { background: rgb(239 68 68 / 0.1); border: 1px solid rgb(239 68 68 / 0.4); color: #fecaca; }
.side { display: grid; gap: 14px; }
.side .panel { padding: 22px; box-shadow: none; }
.side h3 { margin-bottom: 6px; }
.side p { margin: 0 0 12px; font-size: 0.95rem; }
.side .links { display: flex; flex-wrap: wrap; gap: 10px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 36px 0 44px; color: var(--muted); font-size: 0.9rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; align-items: center; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--text); text-decoration: none; }
.site-footer a:hover { color: var(--white); }

/* Simple pages (privacy, thanks, try again, 404) */
.page { padding: clamp(48px, 8vw, 96px) 0; }
.page .wrap { max-width: 780px; }
.page h2 { font-size: 1.35rem; margin-top: 2em; }
.page ul { padding-left: 1.2em; }
.page li { margin-bottom: 0.4em; }
.notice { text-align: center; padding: clamp(80px, 14vw, 160px) 0; }
.notice .mark { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 24px; display: grid; place-items: center; font-size: 1.8rem; font-weight: 800; }
.notice .mark.ok { background: rgb(16 185 129 / 0.15); color: var(--accent-2); }
.notice .mark.err { background: rgb(245 158 11 / 0.15); color: var(--amber); }
.notice .lead { margin-inline: auto; }
.notice .hero-ctas { justify-content: center; }