/* ─────────────────────────────────────────────
   VGK Systems Ltd — site stylesheet
   ───────────────────────────────────────────── */

:root {
  /* palette */
  --navy:        #0B1730;
  --navy-deep:   #07111f;
  --slate:       #56708d;
  --slate-light: #8ba5bf;
  --blue:        #1D77FF;
  --cyan:        #0EA5C6;
  --sky:         #60D6FF;
  --bg:          #f5f7fb;
  --surface:     #ffffff;
  --surface-alt: #eef3f8;
  --surface-dk:  #0d1b2d;
  --text:        #0e1f36;
  --line:        rgba(16,32,51,.1);
  --line-strong: rgba(16,32,51,.16);

  /* semantic */
  --accent:      var(--blue);
  --accent-2:    var(--cyan);
  --shadow:      0 20px 60px rgba(6,18,38,.1);
  --shadow-lg:   0 32px 80px rgba(6,18,38,.14);

  /* layout */
  --radius:    24px;
  --radius-sm: 16px;
  --radius-xs: 10px;
  --container: 1180px;
}

/* ── reset ── */
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-width: 320px;
  background:
    radial-gradient(ellipse 60% 40% at 70% -5%, rgba(29,119,255,.09), transparent 50%),
    radial-gradient(ellipse 40% 30% at 0% 50%,  rgba(14,165,198,.06), transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a   { color: inherit; text-decoration: none; }
button,input,textarea,select { font: inherit; }

/* ── accessibility ── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── layout ── */
.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}
.narrow {
  width: min(calc(100% - 2rem), 860px);
}
.site-shell { position: relative; overflow: hidden; }

/* ── header ── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(1.4);
  background: rgba(245,247,251,.9);
  border-bottom: 1px solid rgba(16,32,51,.06);
  transition: box-shadow .2s;
}
.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(6,18,38,.08);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 1rem 0;
}

/* brand lockup */
.brand {
  display: inline-flex; align-items: center; gap: 0.85rem;
  flex-shrink: 0;
}
.brand-mark { width: 42px; height: 42px; }
.brand-type { height: 26px; width: auto; }

/* nav */
.site-nav {
  display: flex; align-items: center; gap: 1.1rem;
}
.site-nav a {
  color: var(--slate); font-size: .94rem; font-weight: 500;
  transition: color .15s;
}
.site-nav a:hover,
.site-nav a.active { color: var(--text); }

.nav-toggle {
  display: none; width: 44px; height: 44px;
  border: 1px solid var(--line); border-radius: 13px;
  background: rgba(255,255,255,.85); cursor: pointer;
  transition: background .15s;
}
.nav-toggle:hover { background: var(--surface); }
.nav-toggle span {
  display: block; width: 17px; height: 1.5px;
  margin: 4px auto; background: var(--text); border-radius: 999px;
  transition: transform .2s, opacity .2s;
}

/* ── buttons ── */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 50px; padding: .85rem 1.4rem;
  border: none; border-radius: 999px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  font-family: "Manrope", sans-serif; font-weight: 700; font-size: .96rem;
  letter-spacing: -.02em;
  box-shadow: 0 12px 32px rgba(29,119,255,.24), 0 2px 6px rgba(29,119,255,.18);
  transition: transform .18s, box-shadow .18s, filter .18s;
  white-space: nowrap;
}
.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(29,119,255,.28), 0 4px 12px rgba(29,119,255,.2);
  filter: saturate(1.1);
}
.button:active { transform: translateY(0); }

.button-small {
  min-height: 40px; padding: .65rem 1.05rem; font-size: .9rem;
}
.button-secondary {
  background: rgba(255,255,255,.9);
  color: var(--text);
  border: 1px solid var(--line-strong);
  box-shadow: 0 2px 8px rgba(6,18,38,.06);
}
.button-secondary:hover {
  background: var(--surface);
  box-shadow: 0 4px 16px rgba(6,18,38,.1);
  filter: none;
}

/* ── eyebrow ── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.55rem;
  margin-bottom: 1rem;
  color: var(--blue); font-size: .78rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px;
  background: currentColor; opacity: .5;
}

/* ── headings ── */
h1,h2,h3,h4 {
  font-family: "Manrope", sans-serif;
  letter-spacing: -.04em; line-height: 1.05;
}
.hero-copy h1 {
  margin: 0; font-size: clamp(2.8rem, 5.5vw, 5.2rem);
  font-weight: 800; color: var(--navy-deep);
  max-width: 14ch;
}
.page-hero h1,
.section-heading h2,
.split-layout h2,
.cta-panel h2 {
  margin: 0; font-size: clamp(2rem, 3.8vw, 3.4rem);
  font-weight: 800; color: var(--navy-deep); max-width: 16ch;
}

/* ── lead text ── */
.hero-lead,
.page-hero p,
.section-heading p,
.split-layout p,
.cta-panel p,
.feature-card p,
.info-card p,
.value-card p,
.service-detail p,
.capability-card p,
.contact-panel p,
.sidebar-card p,
.site-footer p,
.logo-card p {
  color: var(--slate); font-size: 1rem; line-height: 1.75;
}
.hero-lead {
  max-width: 56ch; margin: 1.2rem 0 0; font-size: 1.1rem;
}

/* ── hero section ── */
.hero-section, .page-hero { padding: 5.5rem 0 2.5rem; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem; align-items: center;
}
.hero-actions {
  display: flex; gap: .85rem; margin: 2rem 0 1.5rem; flex-wrap: wrap;
}
.hero-points, .check-list {
  display: grid; gap: .75rem; padding: 0; margin: 0; list-style: none;
}
.hero-points li, .check-list li {
  position: relative; padding-left: 1.65rem; color: var(--text); font-size: .97rem;
}
.hero-points li::before, .check-list li::before {
  content: "";
  position: absolute; left: 0; top: .55rem;
  width: .65rem; height: .65rem; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 0 0 5px rgba(14,165,198,.1);
}

/* ── hero visual ── */
.card-panel,
.feature-card,
.info-card,
.value-card,
.capability-card,
.contact-panel,
.sidebar-card,
.logo-card {
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-visual {
  padding: 1.5rem;
  background: linear-gradient(160deg, rgba(255,255,255,.94), rgba(237,244,251,.9));
}
.signal-board {
  position: relative; min-height: 320px; border-radius: 20px;
  background:
    radial-gradient(circle at 20% 20%, rgba(29,119,255,.14), transparent 24%),
    radial-gradient(circle at 80% 14%, rgba(14,165,198,.1), transparent 18%),
    linear-gradient(155deg, #0b1730, #132846 72%, #0d1b2d);
  border: 1px solid rgba(147,198,255,.12); overflow: hidden;
}
.signal-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(132,166,203,.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(132,166,203,.1) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 95%);
}
.signal-node, .signal-path { position: absolute; }
.signal-node {
  width: 12px; height: 12px; border-radius: 50%;
  background: linear-gradient(135deg, #94f0ff, #2ea4ff);
  box-shadow: 0 0 0 8px rgba(110,226,255,.07);
}
.signal-path {
  height: 1.5px;
  background: linear-gradient(90deg, rgba(148,240,255,.1), rgba(46,164,255,.85));
  transform-origin: left center; border-radius: 999px;
}
.node-a { top: 20%; left: 18%; }
.node-b { top: 34%; right: 18%; }
.node-c { bottom: 22%; left: 28%; }
.node-d { bottom: 16%; right: 24%; }
.path-a { top: 24%; left: 21%; width: 52%; transform: rotate(10deg); }
.path-b { top: 40%; left: 32%; width: 42%; transform: rotate(118deg); }
.path-c { bottom: 21%; left: 30%; width: 38%; transform: rotate(-6deg); }

.hero-metrics { display: grid; gap: .85rem; margin-top: 1rem; }
.hero-metrics article,
.process-grid article {
  padding: .9rem 1rem; border-radius: 16px;
  background: rgba(11,23,48,.04); border: 1px solid rgba(11,23,48,.05);
}
.hero-metrics span, .process-grid span {
  display: block; margin-bottom: .35rem;
  color: var(--blue); font-size: .76rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
}
.hero-metrics strong {
  font-family: "Manrope", sans-serif; font-size: .97rem; color: var(--text);
}

/* ── intro strip ── */
.intro-strip { padding: .5rem 0 1rem; }
.intro-strip-inner {
  padding: .9rem 1.3rem;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.intro-strip p { margin: 0; color: var(--text); font-size: .95rem; }

/* ── sections ── */
.section { padding: 5.5rem 0; }
.section-muted {
  background: linear-gradient(180deg, rgba(238,243,248,.6), rgba(245,247,251,0));
}
.section-accent {
  background:
    radial-gradient(ellipse 50% 40% at 90% 8%, rgba(14,165,198,.09), transparent 22%),
    linear-gradient(180deg, rgba(238,243,248,.7), rgba(245,247,251,0));
}
.section-heading { margin-bottom: 2.2rem; }
.section-heading p { max-width: 60ch; }

/* ── grids ── */
.card-grid, .value-grid, .process-grid, .logo-grid {
  display: grid; gap: 1.2rem;
}
.three-up, .value-grid, .logo-grid {
  grid-template-columns: repeat(3, minmax(0,1fr));
}

/* ── feature cards ── */
.feature-card, .value-card, .capability-card, .logo-card { padding: 1.5rem; }
.feature-card, .value-card {
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover, .value-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.feature-card h3,
.info-card h3,
.value-card h3,
.capability-card h2,
.logo-card h3,
.service-detail h2,
.contact-panel h2,
.sidebar-card h3,
.site-footer h3 {
  margin-top: 0; margin-bottom: .65rem;
  font-family: "Manrope", sans-serif; letter-spacing: -.03em;
  color: var(--navy-deep);
}

/* ── split layout ── */
.split-layout {
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(300px,.9fr);
  gap: 1.8rem; align-items: start;
}
.info-stack { display: grid; gap: .9rem; }
.info-card  { padding: 1.4rem; }
.dark-card {
  background: linear-gradient(175deg, rgba(7,17,31,.97), rgba(13,27,45,.97));
  border-color: rgba(131,174,220,.12);
}
.dark-card h3, .dark-card p { color: #e8f1ff; }

/* value grid */
.value-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }

/* process grid */
.process-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
.process-grid h3 { margin: 0 0 .6rem; font-family: "Manrope",sans-serif; letter-spacing: -.03em; }
.process-grid p  { margin: 0; color: var(--slate); }

/* ── CTA section ── */
.cta-section { padding-top: 2rem; }
.cta-panel {
  display: flex; align-items: center;
  justify-content: space-between; gap: 1.5rem;
  padding: 2.5rem;
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(ellipse 60% 50% at 95% 0%, rgba(14,165,198,.22), transparent 30%),
    radial-gradient(ellipse 50% 60% at 0% 100%, rgba(29,119,255,.12), transparent 40%),
    linear-gradient(140deg, #091528, #112540 65%, #143056);
  box-shadow: 0 32px 80px rgba(5,15,31,.28);
}
.cta-panel h2, .cta-panel p, .cta-panel .eyebrow { color: #f6fbff; }
.cta-panel .eyebrow::before { background: rgba(255,255,255,.55); }

/* ── text links ── */
.text-link {
  display: inline-flex; margin-top: 1rem;
  color: var(--blue); font-weight: 600; font-size: .97rem;
  transition: color .15s;
}
.text-link:hover { color: var(--cyan); }

/* ── service pages ── */
.service-stack { display: grid; gap: .9rem; }
.service-detail {
  display: grid; grid-template-columns: 260px minmax(0,1fr);
  gap: 1.4rem; padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.service-detail:first-child { padding-top: 0; }
.service-detail:last-child  { border-bottom: 0; }

/* ── capabilities ── */
.capability-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.2rem;
}

/* ── contact ── */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0,1.2fr) minmax(280px,.8fr); gap: 1.3rem;
}
.contact-panel, .sidebar-card { padding: 1.6rem; }
.contact-form { display: grid; gap: .95rem; margin-top: 1.3rem; }
.contact-form label { display: grid; gap: .45rem; color: var(--text); font-weight: 600; }
.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%; padding: .9rem 1rem;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: rgba(255,255,255,.96); color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: rgba(29,119,255,.3);
  box-shadow: 0 0 0 3px rgba(29,119,255,.1);
}
.compact { gap: .6rem; }

/* ── logo grid ── */
.logo-grid img { width: 100%; max-width: 200px; margin-bottom: .9rem; }
.brand-guidance { margin-top: 1.5rem; display: grid; gap: .6rem; }

/* ── footer ── */
.footer-brand { margin-bottom: .9rem; }
.footer-brand-text {
  font-family: "Manrope", sans-serif; font-weight: 700;
  letter-spacing: -.03em; color: #f6fbff;
}
.site-footer {
  margin-top: 5rem; padding: 3rem 0 1rem;
  background:
    radial-gradient(ellipse 50% 40% at 90% 0%, rgba(14,165,198,.14), transparent 20%),
    linear-gradient(175deg, #091320, #07101c);
  color: rgba(233,242,250,.75);
}
.site-footer p, .site-footer a { color: rgba(233,242,250,.75); }
.site-footer a:hover { color: #f0f7ff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .7fr .7fr 1fr; gap: 1.3rem;
}
.footer-bottom {
  padding-top: .9rem; margin-top: 2rem;
  border-top: 1px solid rgba(233,242,250,.08);
}

/* page-specific backgrounds */
.page-hero-ai {
  background:
    radial-gradient(ellipse 60% 40% at 90% 5%, rgba(14,165,198,.12), transparent 35%),
    linear-gradient(175deg, rgba(238,243,248,.35), transparent);
}

/* ── responsive ── */
@media (max-width: 1080px) {
  .hero-grid,
  .split-layout,
  .contact-layout,
  .footer-grid,
  .capability-grid { grid-template-columns: 1fr; }

  .three-up, .logo-grid, .process-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .service-detail { grid-template-columns: 1fr; }
  .cta-panel { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 820px) {
  .site-nav {
    position: absolute;
    top: calc(100% + .75rem); left: 1rem; right: 1rem;
    display: none; flex-direction: column; align-items: stretch;
    gap: .35rem; padding: 1rem; border-radius: 20px;
    background: rgba(255,255,255,.97);
    border: 1px solid rgba(16,32,51,.07);
    box-shadow: var(--shadow-lg);
  }
  .site-nav.is-open { display: flex; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; flex-direction: column; }
  .hero-section, .page-hero { padding-top: 3.8rem; }
  .three-up, .value-grid, .process-grid, .logo-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { max-width: 12ch; }
}

@media (max-width: 640px) {
  .section { padding: 4rem 0; }
  .hero-copy h1 { font-size: 2.7rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button, .button-small { width: 100%; justify-content: center; }
  .brand-type { height: 22px; }
  .hero-visual, .feature-card, .info-card, .value-card,
  .capability-card, .contact-panel, .sidebar-card, .logo-card {
    border-radius: 20px;
  }
  .cta-panel { padding: 1.8rem; }
}