/* =========================================================
   The Magnolia Insight Limited — site styles
   Light + clean tech. One blue accent, cool cyan only in mesh.
   ========================================================= */

:root {
  --canvas: #F8FAFC;
  --surface: #FFFFFF;
  --ink: #0F172A;
  --muted: #475569;
  --faint: #5A6577;
  --line: #E2E8F0;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --cyan: #06B6D4;
  --accent-on-dark: #7DD3FC;

  --maxw: 1120px;
  --measure: 65ch;
  --radius: 14px;
  --radius-sm: 10px;

  --shadow-soft: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);
  --shadow-hover: 0 2px 4px rgba(15, 23, 42, .05), 0 18px 40px rgba(37, 99, 235, .12);

  --font-sans: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;

  --step--1: clamp(.8rem, .77rem + .12vw, .875rem);
  --step-0: clamp(1rem, .96rem + .2vw, 1.0625rem);
  --step-1: clamp(1.2rem, 1.1rem + .5vw, 1.4rem);
  --step-2: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --step-3: clamp(2rem, 1.6rem + 2vw, 3rem);
  --step-4: clamp(2.6rem, 1.9rem + 3.4vw, 4.5rem);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.1; font-weight: 600; letter-spacing: -.02em; margin: 0; }
p { margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img, svg { display: block; max-width: 100%; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: .6rem 1rem;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section { padding-block: clamp(3.5rem, 7vw, 6rem); }
.section--tight { padding-block: clamp(2rem, 4vw, 3rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.lede { color: var(--muted); font-size: var(--step-1); max-width: var(--measure); }
.measure { max-width: var(--measure); }
.muted { color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--step-0);
  padding: .8rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease, border-color .18s ease, color .18s ease;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn--big { padding: 1.1rem 1.8rem; font-size: var(--step-1); }
.btn .arrow { transition: transform .18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, .82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -.01em;
}
.brand:hover { color: var(--ink); }
.brand__mark { flex: 0 0 auto; width: 38px; height: 38px; display: block; object-fit: contain; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name { font-size: 1.02rem; }
.brand__sub { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .18em; color: var(--faint); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: .35rem; }
.nav a {
  color: var(--muted);
  font-size: var(--step--1);
  font-weight: 500;
  padding: .5rem .8rem;
  border-radius: 8px;
  letter-spacing: .01em;
  transition: color .15s ease, background .15s ease;
}
.nav a:hover { color: var(--ink); background: rgba(37, 99, 235, .07); }
.nav a[aria-current="page"] { color: var(--accent); background: rgba(37, 99, 235, .09); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 9px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: var(--ink);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; }
.hero__mesh {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 70% at 78% 18%, rgba(6, 182, 212, .16), transparent 60%),
    radial-gradient(55% 65% at 12% 4%, rgba(37, 99, 235, .14), transparent 62%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(120% 80% at 70% 10%, #000 10%, transparent 70%);
          mask-image: radial-gradient(120% 80% at 70% 10%, #000 10%, transparent 70%);
  opacity: .5;
}
.hero__inner { position: relative; z-index: 1; padding-block: clamp(4rem, 9vw, 7.5rem); }
.hero h1 { font-size: var(--step-4); max-width: 16ch; margin-bottom: 1.4rem; }
.hero h1 .grad {
  background: linear-gradient(96deg, var(--accent), var(--cyan));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--accent);
}
.hero__sub { color: var(--muted); font-size: var(--step-1); max-width: 56ch; margin-bottom: 2rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .85rem; }

/* Meridian: signature dual-direction line */
.meridian {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--faint);
  letter-spacing: .08em;
}
.meridian__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--cyan), transparent);
  position: relative;
}
.meridian__line::before,
.meridian__line::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 7px; height: 7px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: var(--accent);
}
.meridian__line::before { left: 22%; }
.meridian__line::after { right: 22%; background: var(--cyan); }
.meridian span { white-space: nowrap; }

/* ---------- Values strip ---------- */
.values {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.values__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
}
.value {
  background: var(--surface);
  padding: 1.6rem 1.4rem;
}
.value__no { font-family: var(--font-mono); font-size: .72rem; color: var(--accent); letter-spacing: .1em; }
.value h3 { font-size: var(--step-0); margin: .5rem 0 .35rem; }
.value p { font-size: var(--step--1); color: var(--muted); line-height: 1.5; }

/* ---------- Section heading block ---------- */
.head-block { margin-bottom: 2.6rem; max-width: 60ch; }
.head-block h1, .head-block h2 { font-size: var(--step-3); margin-bottom: .9rem; }

/* ---------- Utility classes (extracted from inline styles) ---------- */
.section--surface { background: var(--surface); border-block: 1px solid var(--line); }
.section--flush-top { padding-top: 0; }
.section--pad-top { padding-top: clamp(3rem, 6vw, 4.5rem); }
.heading-spaced { margin-bottom: 1.2rem; }
.eyebrow--on-dark { color: var(--accent-on-dark); }

/* ---------- Service card grid ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(290px, 100%), 1fr));
  gap: 1.1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card__no { font-family: var(--font-mono); font-size: var(--step--1); color: var(--accent); letter-spacing: .12em; }
.card h3 { font-size: var(--step-1); }
.card p { color: var(--muted); font-size: var(--step-0); }
a.card { color: inherit; }
a.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(37, 99, 235, .4); }
a.card:hover h3 { color: var(--accent); }
.card__more {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--accent);
  letter-spacing: .06em;
}

/* ---------- Detailed service sections (services.html) ---------- */
.svc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 1.5rem 2.5rem;
  padding-block: clamp(2.2rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 80px;
}
.svc:first-of-type { border-top: 0; }
.svc__no { font-family: var(--font-mono); font-size: var(--step--1); color: var(--accent); letter-spacing: .14em; }
.svc__title { font-size: var(--step-2); margin-top: .4rem; }
.svc__body p { color: var(--muted); margin-bottom: 1rem; max-width: var(--measure); }
.svc__body p:last-child { margin-bottom: 0; }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.tag {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--muted);
  background: var(--canvas);
  border: 1px solid var(--line);
  padding: .3rem .6rem;
  border-radius: 999px;
}

/* ---------- Generic list cards (extended svc, models, segments) ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 1.1rem;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.tile__no { font-family: var(--font-mono); font-size: var(--step--1); color: var(--accent); letter-spacing: .1em; }
.tile h3 { font-size: var(--step-1); margin: .5rem 0 .5rem; }
.tile p { color: var(--muted); font-size: var(--step-0); }

/* ---------- Two-column feature (Why Hong Kong / business model) ---------- */
.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.split__panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}
.split__panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(80% 60% at 100% 0%, rgba(6, 182, 212, .1), transparent 60%);
}
.bridge-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.1rem; position: relative; z-index: 1; }
.bridge-list li { display: grid; grid-template-columns: auto 1fr; gap: .9rem; align-items: start; }
.bridge-list .k { font-family: var(--font-mono); font-size: .72rem; color: var(--accent); letter-spacing: .1em; padding-top: .25rem; }
.bridge-list strong { display: block; font-weight: 600; margin-bottom: .15rem; }
.bridge-list span.t { color: var(--muted); font-size: var(--step--1); }

/* ---------- Bullet point lists ---------- */
.points { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.2rem; }
.points li { display: grid; grid-template-columns: auto 1fr; gap: .9rem; align-items: start; max-width: var(--measure); }
.points li::before {
  content: "";
  width: 9px; height: 9px;
  margin-top: .55rem;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}
.points strong { font-weight: 600; }
.points p { color: var(--muted); margin-top: .15rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  padding: clamp(2.4rem, 5vw, 3.6rem);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(50% 90% at 90% 10%, rgba(6, 182, 212, .28), transparent 60%),
    radial-gradient(50% 90% at 10% 100%, rgba(37, 99, 235, .35), transparent 60%);
  pointer-events: none;
}
.cta-band__inner { position: relative; z-index: 1; }
.cta-band h2 { font-size: var(--step-3); color: #fff; max-width: 24ch; margin-bottom: 1rem; }
.cta-band p { color: rgba(255,255,255,.78); max-width: 52ch; margin-bottom: 1.8rem; }
.cta-band .btn--ghost { color: #fff; border-color: rgba(255,255,255,.3); }
.cta-band .btn--ghost:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,.08); }

/* ---------- Contact ---------- */
.contact-hero { text-align: left; }
.mail-btn {
  font-family: var(--font-mono);
  font-size: var(--step-2);
  overflow-wrap: anywhere;
}
.note {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--faint);
  letter-spacing: .03em;
  border-left: 2px solid var(--accent);
  padding-left: .9rem;
  margin-top: 1.6rem;
  max-width: 52ch;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding-block: 2.4rem;
  margin-top: clamp(2rem, 5vw, 4rem);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-footer p { color: var(--muted); font-size: var(--step--1); }
.site-footer .footer-brand { font-weight: 600; color: var(--ink); }
.site-footer .footer-sub { font-family: var(--font-mono); letter-spacing: .12em; }
.site-footer a { font-family: var(--font-mono); font-size: var(--step--1); }

/* ---------- Scroll reveal (progressive enhancement) ----------
   Default: fully visible. Only when JS adds .js-ready do we arm it. */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}
.js-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; }
  .svc { grid-template-columns: 1fr; gap: 1rem; }
  .values__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: .2rem;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: .8rem clamp(1.25rem, 4vw, 2.5rem) 1.1rem;
    box-shadow: var(--shadow-soft);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: .75rem .8rem; font-size: var(--step-0); }
  .site-header__inner { position: relative; }
}

@media (max-width: 520px) {
  .values__grid { grid-template-columns: 1fr; }
  .meridian span:nth-child(3) { display: none; }
  .hero__cta .btn { flex: 1 1 auto; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .001ms !important; animation-duration: .001ms !important; }
  .js-ready .reveal { opacity: 1; transform: none; }
}

/* ---------- Office (contact) — editorial split ---------- */
.ofa__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.ofa__title { font-size: var(--step-3); margin-bottom: 1rem; max-width: 16ch; }
.ofa__lede { max-width: 42ch; margin-bottom: 1.6rem; }
.ofa__cta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 500;
  color: var(--accent);
}
.ofa__cta:hover { color: var(--accent-hover); }
.ofa__cta .arrow { transition: transform .18s ease; }
.ofa__cta:hover .arrow { transform: translateX(3px); }
.ofa__meta {
  display: block;
  margin-top: 1.8rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--faint);
}
.ofa__media { display: grid; gap: clamp(1.4rem, 3vw, 2.2rem); }
.ofa__figure { margin: 0; }
.ofa__frame {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  background: var(--surface);
  transition: transform .25s ease, box-shadow .25s ease;
}
.ofa__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.ofa__figure:hover .ofa__frame { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.ofa__cap {
  margin-top: .85rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.ofa__cap-key { color: var(--accent); font-weight: 500; }
@media (max-width: 820px) {
  .ofa__grid { grid-template-columns: 1fr; gap: 2.4rem; }
  .ofa__title { max-width: none; }
}