/* ARV3XA — website stylesheet
   Layout concept: navy "process plant" bands alternating with a pale technical ground;
   gold is reserved for flow lines, figures and calls to action. */
:root {
  --ink: #1B2333;          /* body text */
  --muted: #5B6578;        /* secondary text */
  --ground: #F4F2EC;       /* page background */
  --paper: #FFFFFF;        /* cards */
  --line: #DCD5C5;         /* hairlines */
  --navy: #0E1B30;         /* bands */
  --navy-2: #16294A;       /* panels on navy */
  --on-navy: #EEF1F6;      /* text on navy */
  --on-navy-muted: #A9B4C8;
  --gold: #C9A255;         /* accent on navy */
  --gold-ink: #8E6C2C;     /* accent on light ground */
  --focus: #C9A255;
  --display: "Jost", "Century Gothic", "Avenir Next", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Consolas", ui-monospace, monospace;
  --radius: 4px;
  --maxw: 1180px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #E6EAF1; --muted: #A3ADBF; --ground: #0B1424; --paper: #12203A; --line: #263552;
    --navy: #07101F; --navy-2: #12203A; --on-navy: #EEF1F6; --on-navy-muted: #A9B4C8;
    --gold: #D4AE62; --gold-ink: #D4AE62; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ink: #E6EAF1; --muted: #A3ADBF; --ground: #0B1424; --paper: #12203A; --line: #263552;
  --navy: #07101F; --navy-2: #12203A; --on-navy: #EEF1F6; --on-navy-muted: #A9B4C8;
  --gold: #D4AE62; --gold-ink: #D4AE62; color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 400 1rem/1.6 var(--body); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--display); font-weight: 400; line-height: 1.15; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.3rem; font-weight: 500; }
p { margin: 0; max-width: 68ch; }
.wrap { max-width: var(--maxw); 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: 600 0.78rem/1.2 var(--display); letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold-ink); }
.band-navy .eyebrow, .hero .eyebrow { color: var(--gold); }
.lead { font-size: 1.15rem; color: var(--muted); }
.band-navy .lead { color: var(--on-navy-muted); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.stack { display: grid; gap: 1rem; }
.section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section-head { display: grid; gap: 0.8rem; margin-bottom: 2.4rem; }
.band-navy { background: var(--navy); color: var(--on-navy); }
.band-paper { background: var(--paper); }

/* header */
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--navy); color: var(--on-navy); border-bottom: 1px solid rgba(201,162,85,0.25); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; }
.brand img { height: 34px; width: auto; }
.brand span { font: 400 1.35rem/1 var(--display); letter-spacing: 0.22em; color: var(--gold); }
.nav { display: flex; align-items: center; gap: 1.4rem; }
.nav a { text-decoration: none; font: 500 0.92rem/1 var(--display); letter-spacing: 0.04em; color: var(--on-navy-muted); padding-block: 0.5rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--on-navy); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--gold); }
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.25rem; border-radius: var(--radius); font: 600 0.92rem/1 var(--display); letter-spacing: 0.05em; text-decoration: none; border: 1px solid transparent; cursor: pointer; }
.btn-gold { background: var(--gold); color: #0E1B30; }
.btn-gold:hover { filter: brightness(1.07); }
.btn-ghost { border-color: var(--gold); color: var(--gold); background: transparent; }
.nav .btn { color: #0E1B30; padding: 0.6rem 1rem; }
.nav .btn[aria-current="page"] { box-shadow: none; }
.menu-toggle { display: none; background: none; border: 1px solid rgba(201,162,85,0.5); color: var(--on-navy); border-radius: var(--radius); padding: 0.5rem 0.7rem; font: 500 0.9rem var(--display); }
@media (max-width: 1120px) {
  .menu-toggle { display: inline-block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; background: var(--navy); padding: 0.5rem max(16px, env(safe-area-inset-right, 0px)) 1rem max(16px, env(safe-area-inset-left, 0px)); border-bottom: 1px solid rgba(201,162,85,0.25); }
  .nav.open { display: flex; }
  .nav a { padding: 0.8rem 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .nav .btn { margin-top: 0.8rem; justify-content: center; }
}

/* hero */
.hero { background: var(--navy); color: var(--on-navy); position: relative; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: center; padding-block: clamp(3.5rem, 8vw, 6rem); }
.hero h1 { margin: 1rem 0 1.2rem; }
.hero .lead { margin-bottom: 2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.hero-mark { justify-self: center; width: min(360px, 80%); }
.hero-flow { position: absolute; inset: auto 0 0 0; height: 3px; background: linear-gradient(90deg, transparent, var(--gold), transparent); opacity: 0.6; }
.page-hero { background: var(--navy); color: var(--on-navy); }
.page-hero .wrap { padding-block: clamp(2.8rem, 6vw, 4.2rem); display: grid; gap: 0.9rem; }
.page-hero .lead { max-width: 62ch; }
@media (max-width: 820px) { .hero .wrap { grid-template-columns: 1fr; } .hero-mark { width: 200px; justify-self: start; } }

/* figures */
.figures { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: rgba(201,162,85,0.3); border-top: 1px solid rgba(201,162,85,0.3); }
.figure { background: var(--navy); padding: 1.6rem 1.2rem; display: grid; gap: 0.3rem; }
.figure b { font: 400 clamp(2rem, 4vw, 2.8rem)/1 var(--display); color: var(--on-navy); }
.figure span { color: var(--on-navy-muted); font-size: 0.92rem; }
.figures-note { color: var(--on-navy-muted); font-size: 0.8rem; padding-block: 0.8rem 1.4rem; }
@media (max-width: 720px) { .figures { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* grids & cards */
.grid { display: grid; gap: 1.2rem; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
@media (max-width: 980px) { .g4, .g5 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .g2, .g3, .g4, .g5 { grid-template-columns: 1fr; } }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; display: grid; gap: 0.7rem; align-content: start; min-width: 0; }
.card.rule { border-top: 3px solid var(--gold); }
.card h3 { color: var(--ink); }
.card p { color: var(--muted); font-size: 0.97rem; }
.band-navy .card { background: var(--navy-2); border-color: rgba(201,162,85,0.25); }
.band-navy .card h3 { color: var(--on-navy); }
.band-navy .card p { color: var(--on-navy-muted); }
.tag { font: 600 0.75rem/1 var(--mono); color: var(--gold-ink); letter-spacing: 0.06em; }
.band-navy .tag { color: var(--gold); }
.pill { display: inline-block; font: 600 0.72rem/1 var(--display); letter-spacing: 0.1em; text-transform: uppercase; padding: 0.45rem 0.7rem; border-radius: 99px; background: var(--navy); color: var(--gold); }
.pill.dev { background: transparent; border: 1px solid var(--gold); color: var(--gold-ink); }

/* technology index */
.tech-card { text-decoration: none; display: grid; grid-template-rows: auto 1fr; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .2s ease, border-color .2s ease; }
.tech-card:hover { transform: translateY(-3px); border-color: var(--gold); }
.tech-card .ph { aspect-ratio: 3 / 2; background: var(--navy) center/cover no-repeat; max-width: 100%; }
.tech-card .body { padding: 1.1rem 1.2rem 1.3rem; display: grid; gap: 0.45rem; align-content: start; }
.tech-card h3 { font-size: 1.12rem; }
.tech-card p { font-size: 0.9rem; color: var(--muted); }

/* tech sheet */
.sheet { display: grid; grid-template-columns: 1fr 1fr; gap: 2.4rem; align-items: start; }
@media (max-width: 900px) { .sheet { grid-template-columns: 1fr; } }
.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 0.6rem; align-items: stretch; }
.flow .box { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; min-width: 0; }
.flow .box.mid { background: var(--navy); border-color: var(--gold); color: var(--on-navy); }
.flow .box ul { margin: 0.5rem 0 0; padding-left: 1.1rem; font-size: 0.93rem; }
.flow .arrow { align-self: center; color: var(--gold-ink); font: 600 1.3rem var(--display); }
@media (max-width: 620px) { .flow { grid-template-columns: 1fr; } .flow .arrow { justify-self: center; transform: rotate(90deg); } }
.frame { border: 1px solid var(--gold); border-radius: var(--radius); overflow: hidden; background: var(--navy); }
.frame img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.frame.contain img { object-fit: contain; background: #fff; }
.caption { font-size: 0.85rem; color: var(--muted); margin-top: 0.5rem; }
.kpis { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.8rem; }
.kpi { background: var(--navy); color: var(--on-navy); border-radius: var(--radius); padding: 1.1rem; display: grid; gap: 0.25rem; }
.kpi b { font: 500 1.45rem/1.1 var(--mono); color: var(--on-navy); font-variant-numeric: tabular-nums; }
.kpi span { font-size: 0.82rem; color: var(--on-navy-muted); }
@media (max-width: 560px) { .kpis { grid-template-columns: 1fr; } }
.benefits { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.benefits li { padding-left: 1.6rem; position: relative; }
.benefits li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--gold); }
.refbox { border-left: 3px solid var(--gold); background: var(--paper); padding: 1rem 1.2rem; border-radius: 0 var(--radius) var(--radius) 0; }
.streams { display: grid; gap: 0.5rem; padding: 1.2rem; }
.streams div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0.9rem; border: 1px solid rgba(201,162,85,0.35); border-radius: var(--radius); color: var(--on-navy); }
.streams span { color: var(--gold); font-family: var(--mono); font-size: 0.85rem; }
.pager { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 1.5rem; margin-top: 2.5rem; }
.pager a { text-decoration: none; color: var(--gold-ink); font: 500 0.95rem var(--display); }

/* tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: 0.93rem; }
th { text-align: left; font: 600 0.75rem/1.2 var(--display); letter-spacing: 0.1em; text-transform: uppercase; background: var(--navy); color: var(--gold); padding: 0.85rem 1rem; }
td { padding: 0.8rem 1rem; border-top: 1px solid var(--line); vertical-align: top; }
td:first-child { font-weight: 600; }

/* hub */
.hub { display: grid; grid-template-columns: 0.9fr 0.9fr 1.6fr; gap: 1rem; align-items: center; }
.hub .node { background: var(--navy-2); border: 1px solid var(--gold); border-radius: var(--radius); padding: 1.1rem; color: var(--on-navy); display: grid; gap: 0.3rem; }
.hub .node small { color: var(--on-navy-muted); }
.hub .outs { display: grid; gap: 0.7rem; }
.hub .out { display: grid; grid-template-columns: 1fr auto; gap: 0.3rem 1rem; align-items: center; }
.hub .out .share { font: 600 0.8rem var(--mono); background: var(--gold); color: #0E1B30; padding: 0.25rem 0.55rem; border-radius: 99px; }
@media (max-width: 860px) { .hub { grid-template-columns: 1fr; } }

/* gates */
.gates { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 0.6rem; }
.gate { background: var(--navy-2); border-top: 3px solid var(--gold); border-radius: var(--radius); padding: 1rem 0.9rem; display: grid; gap: 0.5rem; align-content: start; color: var(--on-navy); min-width: 0; }
.gate .g { font: 600 0.8rem var(--mono); color: var(--gold); }
.gate h3 { font-size: 1.02rem; font-weight: 600; letter-spacing: 0.04em; }
.gate p { font-size: 0.85rem; color: var(--on-navy-muted); }
.gate .freeze { font: 600 0.68rem/1 var(--display); letter-spacing: 0.1em; color: var(--gold); border: 1px solid var(--gold); padding: 0.35rem 0.4rem; border-radius: 3px; justify-self: start; }
@media (max-width: 1100px) { .gates { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 620px) { .gates { grid-template-columns: 1fr; } }

/* team */
.person { display: grid; grid-template-columns: 160px 1fr; gap: 1.4rem; align-items: start; }
.person img, .person .mono-ph { width: 160px; height: 190px; object-fit: cover; border: 1px solid var(--gold); border-radius: var(--radius); }
.person .mono-ph { display: grid; place-items: center; background: var(--navy); color: var(--gold); font: 400 2.6rem var(--display); letter-spacing: 0.1em; }
@media (max-width: 560px) { .person { grid-template-columns: 1fr; } }
.ach { display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.2rem 1rem; padding: 0.8rem 0; border-top: 1px solid var(--line); }
.ach b { font: 500 1.05rem var(--mono); color: var(--gold-ink); }
.ach span { font-size: 0.93rem; color: var(--muted); }

/* partners */
.logo-tile { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); display: grid; place-items: center; padding: 1.2rem; aspect-ratio: 16 / 7; max-width: 100%; }
.logo-tile img { max-height: 70px; width: auto; object-fit: contain; }
.partner { display: grid; gap: 0.5rem; text-decoration: none; }
.partner b { font: 500 1rem var(--display); }
.partner span { font-size: 0.85rem; color: var(--muted); }

/* forms */
.tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.tab { background: transparent; border: 1px solid var(--line); color: var(--ink); padding: 0.7rem 1.1rem; border-radius: var(--radius); font: 500 0.95rem var(--display); cursor: pointer; }
.tab[aria-selected="true"] { background: var(--navy); border-color: var(--navy); color: var(--gold); }
form { display: grid; gap: 1rem; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.2rem, 3vw, 2rem); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 620px) { .row { grid-template-columns: 1fr; } }
label { display: grid; gap: 0.35rem; font: 500 0.88rem var(--display); letter-spacing: 0.02em; }
input, select, textarea { font: 400 1rem var(--body); padding: 0.7rem 0.8rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--ground); color: var(--ink); width: 100%; }
textarea { min-height: 140px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
.consent { display: flex; gap: 0.6rem; align-items: flex-start; font: 400 0.85rem var(--body); color: var(--muted); }
.consent input { width: auto; margin-top: 0.25rem; }
.form-note { font-size: 0.85rem; color: var(--muted); }
.notice { border: 1px solid var(--gold); background: var(--paper); padding: 0.9rem 1rem; border-radius: var(--radius); font-size: 0.92rem; }

/* cta & footer */
.cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.site-footer { background: var(--navy); color: var(--on-navy-muted); font-size: 0.9rem; }
.site-footer .wrap { padding-block: 2.6rem 2rem; display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 2rem; }
.site-footer a { color: var(--on-navy-muted); text-decoration: none; }
.site-footer a:hover { color: var(--on-navy); }
.site-footer .legal { grid-column: 1 / -1; border-top: 1px solid rgba(201,162,85,0.25); padding-top: 1.2rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.45rem; }
.site-footer h4 { color: var(--gold); font: 600 0.75rem var(--display); letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 0.8rem; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }

/* Contact page layout */
.contact-grid { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); align-items: start; }
@media (max-width: 820px) { .contact-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) { .row { grid-template-columns: minmax(0, 1fr); } }
.tech-card .ph-streams { display: flex; flex-wrap: wrap; gap: 0.35rem; align-content: center; justify-content: center; height: 100%; padding: 0.8rem; }
.tech-card .ph-streams i { font-style: normal; font-family: var(--mono, monospace); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--gold); border: 1px solid var(--gold); padding: 0.2rem 0.45rem; border-radius: 2px; }