/* pro23 — transport consulting. Monochrome system with one restrained accent. */
:root {
  --ink: #0b0b0c;
  --ink-2: #1a1a1d;
  --graphite: #2b2b2f;
  --steel: #6b6b72;
  --mist: #b9b9bf;
  --fog: #e6e6e8;
  --paper: #f5f5f3;
  --white: #ffffff;
  --accent: #d9d9d9;
  --line: rgba(11, 11, 12, 0.12);
  --line-dark: rgba(255, 255, 255, 0.14);
  --radius: 2px;
  --max: 1200px;
  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: rgba(11, 11, 12, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  color: var(--white);
  border-bottom: 1px solid var(--line-dark);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: inline-flex; align-items: center; gap: 2px; text-decoration: none; font-family: var(--display); font-weight: 500; font-size: 22px; letter-spacing: -0.02em; }
.logo .num { display: inline-grid; place-items: center; background: var(--white); color: var(--ink); font-weight: 700; padding: 0 6px; margin-left: 3px; line-height: 1.25; }
.nav { display: flex; gap: 32px; align-items: center; }
.nav a { text-decoration: none; font-size: 15px; color: var(--mist); transition: color .2s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--white); }
.nav .btn { color: var(--ink); }
.menu-toggle { display: none; background: none; border: 1px solid var(--line-dark); color: var(--white); padding: 8px 12px; font: inherit; font-size: 14px; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--white); color: var(--ink);
  border: 1px solid var(--white);
  padding: 14px 24px; font-weight: 600; font-size: 15px;
  text-decoration: none; border-radius: var(--radius);
  transition: background .2s, color .2s;
}
.btn:hover { background: transparent; color: var(--white) !important; }
.btn.dark { background: var(--ink); color: var(--white); border-color: var(--ink); }
.btn.dark:hover { background: transparent; color: var(--ink) !important; }
.btn.ghost { background: transparent; color: var(--white); border-color: var(--line-dark); }
.btn.ghost:hover { border-color: var(--white); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Hero ---------- */
.hero { background: var(--ink); color: var(--white); position: relative; overflow: hidden; }
.hero .wrap { padding-top: 120px; padding-bottom: 120px; position: relative; z-index: 2; }
.eyebrow { font-family: var(--display); font-size: 13px; letter-spacing: .18em; text-transform: uppercase; color: var(--steel); margin-bottom: 24px; display: flex; align-items: center; gap: 12px; }
.eyebrow::before { content: ""; width: 32px; height: 1px; background: currentColor; }
.hero h1 { font-family: var(--display); font-weight: 500; font-size: clamp(42px, 7vw, 92px); line-height: 1.02; letter-spacing: -0.035em; max-width: 14ch; }
.hero h1 em { font-style: normal; color: var(--steel); }
.hero p.lead { margin-top: 28px; max-width: 54ch; font-size: 19px; color: var(--mist); }
.hero .actions { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-mark {
  position: absolute; right: -40px; bottom: -120px; z-index: 1;
  font-family: var(--display); font-weight: 700; font-size: clamp(260px, 38vw, 560px);
  line-height: 1; letter-spacing: -0.06em; color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.09);
  user-select: none; pointer-events: none;
}
.hero .route { position: absolute; inset: 0; z-index: 1; opacity: .35; pointer-events: none; }

.page-hero .wrap { padding-top: 96px; padding-bottom: 88px; }
.page-hero h1 { font-size: clamp(38px, 5.5vw, 72px); max-width: 18ch; }

/* ---------- Strip ---------- */
.strip { background: var(--ink-2); color: var(--mist); border-top: 1px solid var(--line-dark); }
.strip .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip .item { padding: 28px 24px 28px 0; border-right: 1px solid var(--line-dark); }
.strip .item:last-child { border-right: 0; }
.strip .item + .item { padding-left: 24px; }
.strip strong { display: block; font-family: var(--display); font-weight: 500; font-size: 26px; color: var(--white); letter-spacing: -0.02em; }
.strip span { font-size: 14px; }

/* ---------- Sections ---------- */
section { padding: 112px 0; }
.section-head { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: end; margin-bottom: 64px; }
.section-head h2, h2.title { font-family: var(--display); font-weight: 500; font-size: clamp(32px, 4.2vw, 54px); line-height: 1.05; letter-spacing: -0.03em; }
.section-head p { color: var(--steel); font-size: 18px; max-width: 52ch; }
.dark { background: var(--ink); color: var(--white); }
.dark .section-head p, .dark p.muted { color: var(--mist); }
.grey { background: var(--fog); }

/* ---------- Service grid ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.card {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 40px 32px 44px; background: var(--paper);
  transition: background .25s, color .25s; position: relative; min-height: 280px;
  display: flex; flex-direction: column;
}
.card:hover { background: var(--ink); color: var(--white); }
.card:hover p { color: var(--mist); }
.card .idx { font-family: var(--display); font-size: 13px; color: var(--steel); letter-spacing: .1em; }
.card h3 { font-family: var(--display); font-weight: 500; font-size: 24px; letter-spacing: -0.02em; margin: 28px 0 12px; line-height: 1.15; }
.card p { color: var(--steel); font-size: 16px; transition: color .25s; }
.card .icon { width: 36px; height: 36px; margin-top: 20px; stroke: currentColor; }

/* ---------- Feature (setup) ---------- */
.feature { display: grid; grid-template-columns: 1.1fr 1fr; gap: 80px; align-items: start; }
.feature h2 { font-family: var(--display); font-weight: 500; font-size: clamp(34px, 4.5vw, 58px); line-height: 1.03; letter-spacing: -0.03em; }
.feature p.muted { margin-top: 24px; font-size: 18px; max-width: 48ch; }
.feature .actions { margin-top: 36px; }
.steps { list-style: none; counter-reset: step; border-top: 1px solid var(--line-dark); }
.steps li { counter-increment: step; display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 26px 0; border-bottom: 1px solid var(--line-dark); }
.steps li::before { content: counter(step, decimal-leading-zero); font-family: var(--display); color: var(--steel); font-size: 14px; padding-top: 4px; }
.steps h4 { font-family: var(--display); font-weight: 500; font-size: 20px; letter-spacing: -0.01em; }
.steps p { color: var(--mist); font-size: 15px; margin-top: 4px; }
.light .steps { border-color: var(--line); }
.light .steps li { border-color: var(--line); }
.light .steps p { color: var(--steel); }

/* ---------- Who / cities ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.split > div { background: var(--paper); padding: 56px 48px; }
.split h3 { font-family: var(--display); font-weight: 500; font-size: 30px; letter-spacing: -0.02em; margin-bottom: 16px; }
.split p { color: var(--steel); }
.ticks { list-style: none; margin-top: 24px; }
.ticks li { padding: 12px 0 12px 32px; border-top: 1px solid var(--line); position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 21px; width: 14px; height: 1px; background: var(--ink); }

.cities { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-dark); border: 1px solid var(--line-dark); }
.city { background: var(--ink); padding: 44px 32px; }
.city .code { font-family: var(--display); color: var(--steel); font-size: 13px; letter-spacing: .14em; }
.city h3 { font-family: var(--display); font-weight: 500; font-size: 40px; letter-spacing: -0.03em; margin: 12px 0 8px; }
.city p { color: var(--mist); font-size: 15px; }

/* ---------- CTA ---------- */
.cta { background: var(--white); border-top: 1px solid var(--line); }
.cta .wrap { display: flex; justify-content: space-between; align-items: center; gap: 40px; flex-wrap: wrap; }
.cta h2 { font-family: var(--display); font-weight: 500; font-size: clamp(32px, 4.5vw, 60px); letter-spacing: -0.035em; line-height: 1.02; max-width: 16ch; }

/* ---------- Services page detail ---------- */
.svc { display: grid; grid-template-columns: 120px 1fr 1.1fr; gap: 40px; padding: 56px 0; border-top: 1px solid var(--line); }
.svc:last-child { border-bottom: 1px solid var(--line); }
.svc .idx { font-family: var(--display); font-size: 56px; font-weight: 500; letter-spacing: -0.04em; color: var(--mist); line-height: 1; }
.svc h3 { font-family: var(--display); font-weight: 500; font-size: 30px; letter-spacing: -0.02em; line-height: 1.1; }
.svc p { color: var(--steel); margin-top: 12px; }
.svc ul { list-style: none; }
.svc li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
.svc li:first-child { padding-top: 0; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; align-items: start; }
.portrait { aspect-ratio: 4/5; background: linear-gradient(160deg, #2b2b2f, #0b0b0c); display: grid; place-items: center; color: var(--steel); font-size: 14px; letter-spacing: .1em; text-transform: uppercase; border: 1px solid var(--line); }
.about-grid h2 { font-family: var(--display); font-weight: 500; font-size: clamp(30px, 3.6vw, 44px); letter-spacing: -0.03em; line-height: 1.08; margin-bottom: 24px; }
.about-grid p + p { margin-top: 18px; }
.placeholder { background: #fff6d6; outline: 1px dashed #b38f00; padding: 0 4px; }
.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-dark); border: 1px solid var(--line-dark); }
.values div { background: var(--ink); padding: 40px 28px; }
.values h4 { font-family: var(--display); font-weight: 500; font-size: 22px; margin-bottom: 10px; }
.values p { color: var(--mist); font-size: 15px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 80px; }
.contact-info dl { border-top: 1px solid var(--line); }
.contact-info dt { font-family: var(--display); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--steel); padding-top: 22px; }
.contact-info dd { font-size: 20px; padding: 4px 0 22px; border-bottom: 1px solid var(--line); }
.contact-info dd a { text-decoration: none; border-bottom: 1px solid var(--mist); }
form.enquiry { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
form.enquiry .full { grid-column: 1 / -1; }
form.enquiry label { display: block; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--steel); margin-bottom: 8px; font-family: var(--display); }
form.enquiry input, form.enquiry select, form.enquiry textarea {
  width: 100%; font: inherit; font-size: 16px; padding: 14px 16px;
  background: var(--white); color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius); outline: none;
  transition: border-color .2s;
}
form.enquiry input:focus, form.enquiry select:focus, form.enquiry textarea:focus { border-color: var(--ink); }
form.enquiry textarea { min-height: 150px; resize: vertical; }
form.enquiry button { cursor: pointer; justify-self: start; font-family: inherit; }
.form-note { font-size: 14px; color: var(--steel); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--mist); padding: 80px 0 40px; font-size: 15px; }
.site-footer .top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 56px; border-bottom: 1px solid var(--line-dark); }
.site-footer .logo { color: var(--white); margin-bottom: 16px; }
.site-footer h5 { font-family: var(--display); font-weight: 500; color: var(--white); font-size: 14px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer li { padding: 4px 0; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--white); }
.site-footer .bottom { display: flex; justify-content: space-between; padding-top: 28px; font-size: 13px; color: var(--steel); flex-wrap: wrap; gap: 12px; }

/* ---------- Reveal ---------- */
.reveal.in { animation: rise .7s ease both; }
@keyframes rise { from { transform: translateY(14px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) { .reveal.in { animation: none; } html { scroll-behavior: auto; } }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .section-head, .feature, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split { grid-template-columns: 1fr; }
  .values { grid-template-columns: repeat(2, 1fr); }
  .svc { grid-template-columns: 1fr; gap: 16px; }
  .site-footer .top { grid-template-columns: 1fr 1fr; }
  .strip .wrap { grid-template-columns: repeat(2, 1fr); }
  .strip .item:nth-child(2) { border-right: 0; }
  .strip .item:nth-child(3) { padding-left: 0; }
  .strip .item:nth-child(n+3) { border-top: 1px solid var(--line-dark); }
}
@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  section { padding: 80px 0; }
  .menu-toggle { display: block; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--ink); flex-direction: column; align-items: flex-start; gap: 0; padding: 8px 16px 24px; border-bottom: 1px solid var(--line-dark); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 0; width: 100%; border-bottom: 1px solid var(--line-dark); font-size: 17px; }
  .nav .btn { margin-top: 16px; justify-content: center; border-bottom: 1px solid var(--white); }
  .hero .wrap { padding-top: 80px; padding-bottom: 88px; }
  .grid, .cities, .values { grid-template-columns: 1fr; }
  .split > div { padding: 40px 24px; }
  form.enquiry { grid-template-columns: 1fr; }
  .site-footer .top { grid-template-columns: 1fr; }
  .strip .item, .strip .item + .item { padding: 22px 12px 22px 0; }
  .strip .item:nth-child(even) { padding-left: 12px; }
  .strip strong { font-size: 21px; }
}

/* AVA: public-key widget, no external load until configured and opened. */
.ava-launcher { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 90; display: flex; align-items: center; gap: 10px; border: 0; padding: 0; background: transparent; color: #111; font: 600 14px var(--body); cursor: pointer; }
.ava-launcher > span:last-child { background: #fff; padding: 8px 12px; border-radius: 20px; box-shadow: 0 2px 12px #0002; }
.ava-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%; background: #000; color: #fff; box-shadow: 0 3px 18px #0003; }
.ava-launcher:focus-visible, .ava-close:focus-visible { outline: 3px solid #466dcc; outline-offset: 4px; }
.ava-panel { position: fixed; right: 16px; bottom: calc(88px + env(safe-area-inset-bottom, 0px)); z-index: 91; width: min(380px, calc(100vw - 32px)); max-height: calc(100dvh - 180px); overflow: auto; background: #fff; color: #111; border: 1px solid #ddd; border-radius: 12px; box-shadow: 0 8px 40px #0003; }
.ava-panel[hidden] { display: none; }
.ava-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 16px; background: #111; color: #fff; }
.ava-heading h2 { font-size: 18px; }
.ava-close { width: 44px; height: 44px; background: transparent; border: 0; color: inherit; font-size: 28px; cursor: pointer; }
.ava-content > p { padding: 20px; }
.ava-content a { text-decoration: underline; }
.ava-embed { width: 100%; height: 440px; max-height: calc(100dvh - 250px); min-height: 160px; }
@media (max-width: 720px) { .site-footer { padding-bottom: calc(112px + env(safe-area-inset-bottom, 0px)); } }