/* VisaPilot Inc — citrus-block brand system */
:root {
  --bg: #f6f5ef;
  --ink: #111111;
  --yellow: #ffcc00;
  --white: #ffffff;
  --muted: #4a4a46;
  --muted-dark: #b9b9b2;
  --line-dark: #2e2e2c;
  --font: Inter, "Helvetica Neue", Arial, system-ui, -apple-system, "Segoe UI", sans-serif;
  --wrap: 1280px;
  --gutter: 48px;
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--yellow); outline-offset: 3px; box-shadow: 0 0 0 5px var(--ink); }
.on-yellow :focus-visible, .on-light :focus-visible { outline-color: var(--ink); box-shadow: 0 0 0 5px var(--yellow); }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 300;
  background: var(--yellow); color: var(--ink); padding: 10px 16px; font-weight: 800; text-decoration: none;
}
.skip-link:focus { top: 12px; }

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

/* ---------- Type ---------- */
.display {
  font-size: clamp(2.1rem, 4.3vw, 4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.h-section {
  font-size: clamp(1.7rem, 2.8vw, 2.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.h-block {
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.lead { font-size: 1.2rem; line-height: 1.55; font-weight: 500; max-width: 40ch; }
.muted { color: var(--muted); }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 52px; padding: 0 26px;
  font-weight: 800; font-size: 0.92rem; letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; border: 2px solid var(--ink); border-radius: 0;
  background: var(--ink); color: var(--white); cursor: pointer; font-family: inherit;
  transition: background-color .15s, color .15s;
}
.btn:hover { background: var(--white); color: var(--ink); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--yellow); }
.btn--yellow { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.btn--yellow:hover { background: transparent; color: var(--yellow); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }
.arrow-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 800; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; border-bottom: 2px solid currentColor; padding-bottom: 3px;
}
.arrow-link:hover { color: var(--yellow); }
.on-light .arrow-link:hover, .on-yellow .arrow-link:hover { color: var(--ink); background: var(--yellow); }
.arrow-link::after { content: "\2192"; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 200; background: var(--ink); color: var(--white); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; }
.brand {
  font-weight: 800; font-size: 1.3rem; letter-spacing: -0.01em; text-transform: uppercase;
  text-decoration: none; color: var(--white); white-space: nowrap;
}
.brand span { color: var(--yellow); }
.nav-list { display: flex; gap: 34px; list-style: none; }
.nav-list a {
  color: var(--white); text-decoration: none; font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; padding: 8px 0; border-bottom: 2px solid transparent;
}
.nav-list a:hover { color: var(--yellow); }
.nav-list a[aria-current="page"] { color: var(--yellow); border-bottom-color: var(--yellow); }
.menu-toggle {
  display: none; width: 46px; height: 46px; background: transparent; border: 2px solid var(--white);
  color: var(--white); cursor: pointer; padding: 0; align-items: center; justify-content: center;
}
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
  display: block; width: 20px; height: 2px; background: currentColor; position: relative; content: "";
}
.menu-toggle span::before { position: absolute; top: -6px; }
.menu-toggle span::after { position: absolute; top: 6px; }
.menu-toggle[aria-expanded="true"] span { background: transparent; }
.menu-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); background: var(--yellow); }
.menu-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); background: var(--yellow); }

/* ---------- Icon tile ---------- */
.icon-tile {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; background: var(--yellow); color: var(--ink); flex: none;
}
.icon-tile svg { width: 24px; height: 24px; }

/* ---------- Photos (hard crops) ---------- */
.photo { position: relative; overflow: hidden; background: #222; }
.photo img { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.08) saturate(0.92); }
.photo--square { aspect-ratio: 1 / 1; }
.photo--tall { aspect-ratio: 3 / 4; }
.photo--wide { aspect-ratio: 16 / 10; }
.pos-right img { object-position: 72% 50%; }
.pos-left img { object-position: 30% 50%; }
.pos-center img { object-position: 52% 50%; }

/* ================= HOME ================= */
.home-hero { background: var(--yellow); color: var(--ink); }
.home-hero .wrap {
  display: grid; grid-template-columns: 1.08fr 1fr; gap: 56px; align-items: center;
  padding-top: 72px; padding-bottom: 72px;
}
.home-hero h1 { max-width: 13ch; margin-bottom: 28px; }
.home-hero .lead { margin-bottom: 36px; }
.hero-collage {
  display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; gap: 18px;
  grid-template-areas: "note a" "b c";
}
.hero-collage .ca { grid-area: a; }
.hero-collage .cb { grid-area: b; }
.hero-collage .cc { grid-area: c; }
.hero-collage .photo { border: 3px solid var(--ink); }
.hero-note {
  grid-area: note; align-self: end; border-top: 3px solid var(--ink); padding-top: 14px;
  font-size: 0.92rem; font-weight: 600; line-height: 1.45;
}
.hero-note strong { display: block; font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 6px; }

.zone-dark { background: var(--ink); color: var(--white); }
.zone-white { background: var(--white); }
.zone-base { background: var(--bg); }
.section { padding: 96px 0; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; margin-bottom: 56px; }
.section-head p { max-width: 52ch; }
.zone-dark .section-head p, .zone-dark .muted { color: var(--muted-dark); }

.platform-band {
  display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center;
  border: 2px solid var(--yellow); padding: 28px 32px; margin-bottom: 40px;
}
.platform-band h3 { color: var(--yellow); }
.platform-band p { color: var(--muted-dark); margin-top: 6px; max-width: 70ch; }

.core-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.core-card { display: flex; flex-direction: column; }
.core-card .photo { aspect-ratio: 4 / 3; }
.core-card .icon-tile { margin-top: -22px; margin-left: 0; position: relative; z-index: 1; }
.core-card h3 { margin: 18px 0 10px; }
.core-card p { color: var(--muted-dark); font-size: 0.98rem; margin-bottom: 8px; }
.core-card .benefit { color: var(--white); font-weight: 600; }
.core-card .arrow-link { margin-top: auto; align-self: flex-start; padding-top: 14px; }

.usecase-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 3px solid var(--ink); }
.usecase { padding: 32px 32px 8px 0; }
.usecase + .usecase { padding-left: 32px; border-left: 1px solid #d8d7cf; }
.usecase .num { font-size: 3.4rem; font-weight: 800; line-height: 1; letter-spacing: -0.04em; display: block; margin-bottom: 18px; }
.usecase .num::after { content: ""; display: block; width: 36px; height: 8px; background: var(--yellow); margin-top: 12px; }
.usecase h3 { margin-bottom: 12px; }
.usecase p { color: var(--muted); }
.usecase .tags { margin-top: 16px; font-size: 0.82rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }

.why-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 64px; }
.why-grid .h-section { margin-bottom: 20px; }
.why-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 36px 40px; }
.why-list li { position: relative; padding-left: 30px; }
.why-list li::before { content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px; background: var(--yellow); border: 2px solid var(--ink); }
.why-list strong { display: block; font-size: 1.05rem; margin-bottom: 6px; line-height: 1.3; }
.why-list span { color: var(--muted); font-size: 0.97rem; }

.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: step; }
.steps li { counter-increment: step; padding: 0 32px 0 0; }
.steps li + li { padding-left: 32px; border-left: 1px solid var(--line-dark); }
.steps li::before {
  content: counter(step, decimal-leading-zero); display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; background: var(--yellow); color: var(--ink);
  font-size: 1.5rem; font-weight: 800; margin-bottom: 24px;
}
.steps h3 { margin-bottom: 10px; }
.steps p { color: var(--muted-dark); }
.steps-foot { margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--line-dark); display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }

.about-split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: start; }
.about-split .h-section { margin-bottom: 24px; }
.about-split p + p { margin-top: 16px; }
.about-split .arrow-link { margin-top: 28px; }
.fact-block { background: var(--yellow); padding: 36px; }
.fact-block dl { display: grid; gap: 22px; }
.fact-block dt { font-size: 0.74rem; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 4px; }
.fact-block dd { font-size: 1.08rem; font-weight: 700; line-height: 1.4; }
.fact-block a { text-decoration-thickness: 2px; text-underline-offset: 3px; }

.home-contact .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: end; }
.home-contact .display { text-transform: uppercase; font-size: clamp(2.2rem, 4.4vw, 3.6rem); margin-bottom: 20px; }
.home-contact p { color: var(--muted-dark); max-width: 46ch; }
.contact-lines { list-style: none; display: grid; gap: 22px; }
.contact-lines li { display: flex; gap: 16px; align-items: flex-start; }
.contact-lines .lbl { display: block; font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-dark); font-weight: 700; }
.contact-lines a, .contact-lines .val { font-size: 1.2rem; font-weight: 700; color: var(--white); text-decoration: none; word-break: break-word; }
.contact-lines a:hover { color: var(--yellow); text-decoration: underline; }
.contact-lines .icon-tile { width: 36px; height: 36px; }
.contact-lines .icon-tile svg { width: 20px; height: 20px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--white); border-top: 8px solid var(--yellow); }
.site-footer .wrap { padding-top: 64px; padding-bottom: 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.footer-grid h2 { font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--yellow); margin-bottom: 16px; }
.footer-grid p, .footer-grid li, .footer-grid address { color: var(--muted-dark); font-size: 0.95rem; font-style: normal; }
.footer-grid ul { list-style: none; display: grid; gap: 8px; }
.footer-grid a { color: var(--white); text-decoration: none; }
.footer-grid a:hover { color: var(--yellow); text-decoration: underline; }
.footer-brand { font-size: 1.5rem; font-weight: 800; text-transform: uppercase; margin-bottom: 12px; display: inline-block; }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line-dark); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: var(--muted-dark); }

/* ================= INNER — shared ================= */
.breadcrumb { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; opacity: .5; }
.breadcrumb a { text-decoration: none; border-bottom: 2px solid var(--yellow); }
.breadcrumb a:hover { background: var(--yellow); }
.breadcrumb [aria-current] { opacity: .65; }
.zone-dark .breadcrumb a:hover { color: var(--ink); }

.cta-strip { background: var(--yellow); }
.cta-strip .wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding-top: 64px; padding-bottom: 64px; }
.cta-strip .h-section { margin-bottom: 12px; }
.cta-strip .btn-row { justify-content: flex-end; }

/* ================= SERVICES OVERVIEW ================= */
.svc-intro { background: var(--white); border-bottom: 3px solid var(--ink); }
.svc-intro .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 0; padding: 0 var(--gutter); }
.svc-intro-text { padding: 56px 56px 64px 0; }
.svc-intro-text .breadcrumb { margin-bottom: 40px; }
.svc-intro-text h1 { margin-bottom: 24px; max-width: 16ch; }
.svc-intro-text p + p { margin-top: 14px; }
.svc-index { background: var(--yellow); padding: 56px 40px; }
.svc-index h2 { margin-bottom: 20px; }
.svc-index ol { list-style: none; border-top: 2px solid var(--ink); }
.svc-index li { border-bottom: 2px solid var(--ink); }
.svc-index a { display: grid; grid-template-columns: 44px 1fr auto; gap: 8px; align-items: center; padding: 16px 0; text-decoration: none; font-weight: 800; line-height: 1.25; }
.svc-index a::after { content: "\2193"; }
.svc-index a:hover { background: var(--ink); color: var(--yellow); padding-left: 10px; padding-right: 10px; }
.svc-index .n { font-size: 0.85rem; }

.svc-row { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: center; padding: 88px 0; border-bottom: 1px solid #d8d7cf; }
.svc-row:last-child { border-bottom: 0; }
.svc-row.flip .svc-photo { order: 2; }
.svc-photo { position: relative; }
.svc-photo .tag {
  position: absolute; left: 0; top: 0; background: var(--ink); color: var(--yellow);
  font-weight: 800; font-size: 1.6rem; padding: 10px 16px; letter-spacing: -0.02em;
}
.svc-row.flip .svc-photo .tag { left: auto; right: 0; }
.svc-row h2 { margin: 12px 0 18px; }
.svc-row .summary { font-size: 1.12rem; font-weight: 500; margin-bottom: 22px; }
.covers { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; margin-bottom: 24px; }
.covers li { padding-left: 20px; position: relative; font-size: 0.97rem; }
.covers li::before { content: ""; position: absolute; left: 0; top: 9px; width: 9px; height: 9px; background: var(--yellow); outline: 2px solid var(--ink); }
.outcome { border-left: 6px solid var(--yellow); background: var(--bg); padding: 14px 18px; margin-bottom: 28px; font-weight: 600; }
.outcome b { display: block; font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 4px; }
.row-actions { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; }

.matrix { width: 100%; border-collapse: collapse; font-size: 0.97rem; }
.matrix th, .matrix td { text-align: left; vertical-align: top; padding: 20px 18px; border-bottom: 1px solid var(--line-dark); }
.matrix thead th { font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--yellow); border-bottom: 2px solid var(--yellow); }
.matrix tbody th { font-weight: 800; width: 24%; }
.matrix td { color: var(--muted-dark); }
.table-scroll { overflow-x: auto; }

/* ================= SERVICE DETAIL ================= */
.detail-top { background: var(--bg); }
.detail-top .wrap { display: grid; grid-template-columns: 340px 1fr; gap: 56px; padding-top: 48px; padding-bottom: 72px; align-items: start; }
.detail-aside { position: sticky; top: calc(var(--header-h) + 24px); }
.detail-aside .photo { border: 3px solid var(--ink); }
.detail-aside .aside-card { background: var(--ink); color: var(--white); padding: 22px; margin-top: 18px; }
.detail-aside .aside-card p { color: var(--muted-dark); font-size: 0.93rem; margin: 8px 0 16px; }
.detail-aside .aside-card a.mail { color: var(--yellow); font-weight: 700; word-break: break-all; }
.detail-main .breadcrumb { margin-bottom: 28px; }
.detail-main h1 { font-size: clamp(2rem, 3.6vw, 3.3rem); font-weight: 800; line-height: 1.04; letter-spacing: -0.03em; text-transform: uppercase; margin: 10px 0 22px; max-width: 18ch; }
.detail-main .lead { max-width: 56ch; margin-bottom: 18px; }
.detail-main > p { max-width: 64ch; }
.detail-block { margin-top: 52px; padding-top: 22px; border-top: 3px solid var(--ink); }
.detail-block > h2 { font-size: 1.2rem; font-weight: 800; letter-spacing: 0.02em; text-transform: uppercase; margin-bottom: 18px; }
.detail-block > p { max-width: 64ch; }
.feature-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.feature-list li { padding: 18px 22px 18px 0; border-bottom: 1px solid #d8d7cf; }
.feature-list li:nth-child(even) { padding-left: 22px; border-left: 1px solid #d8d7cf; }
.feature-list strong { display: block; margin-bottom: 4px; }
.feature-list span { color: var(--muted); font-size: 0.96rem; }
.benefit-panel { background: var(--yellow); padding: 28px 30px; font-size: 1.15rem; font-weight: 600; line-height: 1.5; }
.benefit-panel + ul { margin-top: 20px; }
.check-list { list-style: none; display: grid; gap: 12px; }
.check-list li { padding-left: 28px; position: relative; }
.check-list li::before { content: ""; position: absolute; left: 0; top: 6px; width: 14px; height: 14px; background: var(--ink); box-shadow: inset 0 0 0 3px var(--yellow); }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scenario .photo { aspect-ratio: 4 / 3; border: 2px solid var(--ink); }
.scenario h3 { font-size: 0.95rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.02em; margin: 14px 0 6px; }
.scenario p { font-size: 0.93rem; color: var(--muted); }
.impl-steps { list-style: none; counter-reset: s; display: grid; gap: 0; }
.impl-steps li { counter-increment: s; display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid #d8d7cf; }
.impl-steps li::before { content: counter(s); width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; background: var(--ink); color: var(--yellow); font-weight: 800; font-size: 1.1rem; }
.impl-steps strong { display: block; margin-bottom: 2px; }
.impl-steps span { color: var(--muted); font-size: 0.96rem; }
.related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 2px solid var(--ink); }
.related a { padding: 22px; text-decoration: none; font-weight: 800; text-transform: uppercase; font-size: 0.92rem; line-height: 1.3; display: flex; flex-direction: column; gap: 14px; justify-content: space-between; min-height: 120px; }
.related a + a { border-left: 2px solid var(--ink); }
.related a span { font-size: 0.75rem; letter-spacing: 0.12em; color: var(--muted); }
.related a:hover { background: var(--yellow); }

/* ================= ABOUT ================= */
.about-hero { background: var(--ink); color: var(--white); overflow: hidden; }
.about-hero .wrap { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 56px; align-items: stretch; }
.about-hero-text { padding: 56px 0 80px; }
.about-hero-text .breadcrumb { margin-bottom: 48px; }
.about-hero-text .display { margin-bottom: 26px; }
.about-hero-text .display em { font-style: normal; color: var(--yellow); }
.about-hero-text .lead { color: var(--muted-dark); max-width: 46ch; }
.about-hero .photo { height: 100%; min-height: 420px; border-left: 12px solid var(--yellow); }
.about-hero .photo img { object-position: 42% 50%; }
.focus-list { list-style: none; border-top: 3px solid var(--ink); }
.focus-list li { display: grid; grid-template-columns: 70px 1fr 1.2fr auto; gap: 24px; align-items: baseline; padding: 26px 0; border-bottom: 1px solid #d8d7cf; }
.focus-list .n { font-size: 1.8rem; font-weight: 800; letter-spacing: -0.03em; }
.focus-list h3 { font-size: 1.15rem; }
.focus-list p { color: var(--muted); }
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px; background: var(--line-dark); border: 2px solid var(--line-dark); }
.principles > div { background: var(--ink); padding: 34px; }
.principles h3 { color: var(--yellow); margin-bottom: 10px; }
.principles p { color: var(--muted-dark); }
.audience { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; }
.audience-roles { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.audience-roles li { background: var(--white); border: 2px solid var(--ink); padding: 20px; }
.audience-roles strong { display: block; text-transform: uppercase; font-size: 0.95rem; margin-bottom: 6px; }
.audience-roles span { color: var(--muted); font-size: 0.94rem; }

/* ================= CONTACT ================= */
.contact-hero .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0 var(--gutter); }
.contact-hero { background: var(--bg); border-bottom: 3px solid var(--ink); }
.contact-intro { padding: 56px 56px 72px 0; }
.contact-intro .breadcrumb { margin-bottom: 40px; }
.contact-intro .display { margin-bottom: 22px; }
.contact-intro p { max-width: 46ch; }
.mail-panel { background: var(--yellow); padding: 56px 48px; display: flex; flex-direction: column; justify-content: center; gap: 28px; }
.mail-panel .big-mail { font-size: clamp(1.35rem, 2.4vw, 2.1rem); font-weight: 800; letter-spacing: -0.02em; word-break: break-word; text-decoration: none; border-bottom: 4px solid var(--ink); align-self: flex-start; line-height: 1.2; }
.mail-panel .big-mail:hover { background: var(--ink); color: var(--yellow); }
.copy-status { min-height: 1.5em; font-weight: 700; font-size: 0.95rem; }
.mail-panel address { font-style: normal; font-weight: 700; font-size: 1.1rem; border-top: 2px solid var(--ink); padding-top: 20px; }
.mail-panel address span { display: block; font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 4px; }
.prep-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 64px; }
.prep-list { list-style: none; counter-reset: p; display: grid; grid-template-columns: 1fr 1fr; gap: 28px 36px; }
.prep-list li { counter-increment: p; border-top: 3px solid var(--ink); padding-top: 16px; }
.prep-list li::before { content: counter(p, decimal-leading-zero); display: block; font-weight: 800; font-size: 0.85rem; margin-bottom: 8px; background: var(--yellow); width: max-content; padding: 2px 8px; }
.prep-list strong { display: block; margin-bottom: 4px; }
.prep-list span { color: var(--muted); font-size: 0.96rem; }
.topic-links { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px; background: var(--line-dark); }
.topic-links a { display: flex; justify-content: space-between; gap: 16px; align-items: center; background: var(--ink); color: var(--white); padding: 26px 28px; text-decoration: none; font-weight: 800; text-transform: uppercase; font-size: 0.98rem; line-height: 1.3; height: 100%; }
.topic-links a::after { content: "\2709"; color: var(--yellow); font-size: 1.3rem; }
.topic-links a:hover { background: var(--yellow); color: var(--ink); }
.topic-links a:hover::after { color: var(--ink); }

/* ================= RESPONSIVE ================= */
@media (max-width: 1100px) {
  :root { --gutter: 32px; }
  .nav-list { gap: 22px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail-top .wrap { grid-template-columns: 280px 1fr; gap: 40px; }
  .focus-list li { grid-template-columns: 56px 1fr; }
  .focus-list li p, .focus-list li .arrow-link { grid-column: 2; }
}

@media (max-width: 860px) {
  :root { --gutter: 20px; --header-h: 64px; }
  body { font-size: 16px; }
  .menu-toggle { display: inline-flex; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: var(--header-h);
    background: var(--ink); border-top: 1px solid var(--line-dark); border-bottom: 6px solid var(--yellow);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .no-js .site-nav { display: block; position: static; }
  .nav-list { flex-direction: column; gap: 0; padding: 8px var(--gutter) 16px; }
  .nav-list a { display: block; padding: 14px 0; font-size: 1rem; border-bottom: 1px solid var(--line-dark); }
  .nav-list a[aria-current="page"] { border-bottom-color: var(--yellow); }

  .section { padding: 64px 0; }
  .section-head, .why-grid, .about-split, .home-contact .wrap, .cta-strip .wrap,
  .svc-intro .wrap, .svc-row, .detail-top .wrap, .about-hero .wrap, .audience,
  .contact-hero .wrap, .prep-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-head { margin-bottom: 36px; }

  .home-hero .wrap { grid-template-columns: 1fr; gap: 28px; padding-top: 36px; padding-bottom: 36px; }
  .home-hero .lead { margin-bottom: 26px; font-size: 1.05rem; }
  .hero-collage { grid-template-columns: 1.2fr 1fr; gap: 10px; grid-template-areas: "a b" "a c"; }
  .hero-collage .ca { aspect-ratio: auto; height: 100%; }
  .hero-collage .photo { border-width: 2px; }
  .hero-note { display: none; }

  .platform-band { grid-template-columns: 1fr; gap: 14px; padding: 22px; }
  .core-grid { grid-template-columns: 1fr; gap: 0; }
  .core-card { display: grid; grid-template-columns: 44px 1fr; column-gap: 16px; padding: 22px 0; border-top: 1px solid var(--line-dark); }
  .core-card .photo { display: none; }
  .core-card .icon-tile { margin-top: 0; grid-row: span 4; }
  .core-card h3 { margin: 0 0 8px; font-size: 1.1rem; }
  .core-card .arrow-link { padding-top: 8px; }

  .usecase-grid { grid-template-columns: 1fr; }
  .usecase, .usecase + .usecase { padding: 26px 0; border-left: 0; border-bottom: 1px solid #d8d7cf; }
  .usecase .num { font-size: 2.4rem; }
  .why-list { grid-template-columns: 1fr; gap: 22px; }
  .steps { grid-template-columns: 1fr; }
  .steps li, .steps li + li { padding: 24px 0; border-left: 0; border-top: 1px solid var(--line-dark); }
  .steps li::before { width: 48px; height: 48px; font-size: 1.15rem; margin-bottom: 14px; }
  .fact-block { padding: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-strip .btn-row { justify-content: flex-start; }

  .svc-intro-text { padding: 32px 0 36px; }
  .svc-index { margin: 0 calc(var(--gutter) * -1); padding: 32px var(--gutter); }
  .svc-row { padding: 52px 0; }
  .svc-row.flip .svc-photo { order: 0; }
  .covers { grid-template-columns: 1fr; }
  .matrix thead { display: none; }
  .matrix, .matrix tbody, .matrix tr, .matrix th, .matrix td { display: block; width: 100%; }
  .matrix tr { border-bottom: 2px solid var(--yellow); padding: 10px 0; }
  .matrix th, .matrix td { border: 0; padding: 8px 0; }
  .matrix tbody th { width: 100%; color: var(--yellow); }
  .matrix td::before { content: attr(data-label); display: block; font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--white); font-weight: 700; }

  .detail-top .wrap { padding-top: 28px; padding-bottom: 48px; }
  .detail-aside { position: static; order: 2; }
  .detail-main { order: 1; }
  .detail-aside .photo { aspect-ratio: 4 / 3; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-list li, .feature-list li:nth-child(even) { padding: 16px 0; border-left: 0; }
  .scenario-grid { grid-template-columns: 1fr; }
  .related { grid-template-columns: 1fr; }
  .related a + a { border-left: 0; border-top: 2px solid var(--ink); }
  .related a { min-height: 0; }

  .about-hero-text { padding: 32px 0 8px; }
  .about-hero-text .breadcrumb { margin-bottom: 28px; }
  .about-hero .photo { min-height: 0; aspect-ratio: 4 / 3; border-left: 0; border-top: 10px solid var(--yellow); margin: 0 calc(var(--gutter) * -1); }
  .focus-list li { grid-template-columns: 1fr; gap: 6px; }
  .focus-list li p, .focus-list li .arrow-link { grid-column: auto; }
  .principles { grid-template-columns: 1fr; }
  .principles > div { padding: 26px; }
  .audience-roles { grid-template-columns: 1fr; }

  .contact-intro { padding: 32px 0 36px; }
  .mail-panel { margin: 0 calc(var(--gutter) * -1); padding: 36px var(--gutter); }
  .prep-list { grid-template-columns: 1fr; }
  .topic-links { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .display { font-size: 2.1rem; }
  .brand { font-size: 1.1rem; }
  .btn { width: 100%; justify-content: center; }
}

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

/* spacing utilities */
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-28 { margin-top: 28px; }
.mt-36 { margin-top: 36px; }