/* ============================================================
   VANTAGE TECH — Stylesheet
   Brand cyan #89ddfd · dark UI · geometric display + Inter body
   ============================================================ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Surfaces */
  --bg-primary: #08090d;
  --bg-secondary: #0c0e14;
  --bg-card: #11141d;
  --bg-card-hover: #161a26;

  /* Text */
  --text-primary: #ecedf4;
  --text-secondary: #a6a9c0;
  --text-muted: #8b8ea3;

  /* Brand */
  --accent: #89ddfd;
  --accent-strong: #5ec8ef;
  --accent-soft: #b6ebff;
  --accent-dim: rgba(137, 221, 253, 0.12);
  --accent-glow: rgba(137, 221, 253, 0.35);
  --success: #4ade80;

  /* Lines */
  --border: rgba(137, 221, 253, 0.09);
  --border-light: rgba(137, 221, 253, 0.18);

  /* Type */
  --font-display: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --fs-eyebrow: 0.78rem;
  --fs-small: 0.875rem;
  --fs-body: 1rem;
  --fs-body-lg: 1.125rem;
  --fs-h3: 1.25rem;
  --fs-h2: clamp(1.9rem, 3vw + 0.6rem, 2.6rem);
  --fs-h1: clamp(2.5rem, 5vw + 1rem, 4rem);
  --lh-body: 1.65;

  /* Space (8px base) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* Layout */
  --container: 1200px;
  --gutter: 1.5rem;
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 68px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img, svg, canvas { display: block; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hidden { display: none !important; }

/* Shared layout primitives */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.accent { color: var(--accent); }

.section-head { max-width: 640px; margin-bottom: var(--space-5); }
.section-head .eyebrow { margin-bottom: var(--space-2); }
.section-head h2 { font-size: var(--fs-h2); margin-bottom: var(--space-2); }
.section-head p { color: var(--text-secondary); font-size: var(--fs-body-lg); max-width: 54ch; }

/* Accessibility helpers */
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 2000;
  background: var(--accent);
  color: #06121a;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 16px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 13px 30px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: none;
  white-space: nowrap;
  transition: transform 0.25s var(--ease-spring),
              box-shadow 0.3s ease,
              background 0.25s ease,
              border-color 0.25s ease,
              color 0.25s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #9ee4ff, var(--accent-strong));
  color: #06121a;
  box-shadow: 0 2px 18px rgba(137, 221, 253, 0.22);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(137, 221, 253, 0.4);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn-ghost:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent-soft);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* ============================================================
   Navigation
   ============================================================ */

.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(8, 9, 13, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.navbar.scrolled {
  background: rgba(8, 9, 13, 0.9);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  height: 48px;
}
.nav-logo img { height: 42px; width: auto; filter: drop-shadow(0 0 12px rgba(137, 221, 253, 0.3)); }

.nav-links { display: flex; align-items: center; gap: var(--space-4); }
.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.25s ease;
}
.nav-links a:not(.btn):hover { color: var(--text-primary); }
.nav-links .btn { min-height: 42px; padding: 9px 22px; font-size: 0.88rem; }

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
}
.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin-inline: auto;
  border-radius: 2px;
  background: var(--text-primary);
  transition: transform 0.3s var(--ease-out), opacity 0.2s ease;
}
.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
  background: var(--bg-primary);
}

#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }

.hero-glow {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(70% 60% at 18% 32%, rgba(137, 221, 253, 0.12), transparent 60%),
    radial-gradient(60% 60% at 85% 70%, rgba(94, 200, 239, 0.08), transparent 55%);
  pointer-events: none;
}

.hero-inner { position: relative; z-index: 2; }
.hero-content { max-width: 660px; }
.hero-content .eyebrow { display: block; margin-bottom: var(--space-3); }
.hero h1 {
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.035em;
  text-wrap: balance;
  margin-bottom: var(--space-3);
}
.hero-sub {
  font-size: var(--fs-body-lg);
  color: var(--text-secondary);
  max-width: 52ch;
  margin-bottom: var(--space-4);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.hero-note { font-size: var(--fs-small); color: var(--text-muted); }

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px;
  height: 42px;
  border: 1.5px solid var(--border-light);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px;
  height: 8px;
  border-radius: 4px;
  background: var(--accent);
  animation: scroll-dot 1.8s var(--ease-out) infinite;
}
@keyframes scroll-dot {
  0% { opacity: 0; transform: translateY(0); }
  30% { opacity: 1; }
  60% { opacity: 1; transform: translateY(12px); }
  100% { opacity: 0; transform: translateY(16px); }
}

/* ============================================================
   Logo strip
   ============================================================ */

.logos {
  border-block: 1px solid var(--border);
  background: var(--bg-secondary);
}
.logos-inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
}
.logos p {
  font-size: var(--fs-small);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.logos ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  align-items: center;
  justify-content: center;
}
.logos li {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  opacity: 0.8;
  transition: color 0.25s ease, opacity 0.25s ease;
}
.logos li:hover { color: var(--text-primary); opacity: 1; }

/* ============================================================
   Section scaffolding
   ============================================================ */

.section { padding-block: var(--space-7); }
/* Alternating tonal band for section rhythm */
.band {
  background: var(--bg-secondary);
  border-block: 1px solid var(--border);
}
.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* Services */
.service-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
}
.service-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: transform 0.35s var(--ease-out),
              border-color 0.35s ease,
              background 0.35s ease,
              box-shadow 0.35s ease;
}
.service-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  box-shadow: 0 14px 40px rgba(137, 221, 253, 0.1);
}
.service-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-dim);
  color: var(--accent);
  margin-bottom: var(--space-3);
  transition: transform 0.35s var(--ease-spring), background 0.35s ease;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card:hover .service-icon { transform: scale(1.08); background: rgba(137, 221, 253, 0.2); }
.service-card h3 { font-size: var(--fs-h3); margin-bottom: var(--space-2); color: var(--text-primary); }
.service-card p { font-size: var(--fs-body); color: var(--text-secondary); }

/* Process / How it works */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3);
  counter-reset: step;
}
.step {
  position: relative;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(137, 221, 253, 0.03), transparent);
}
.step-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  margin-bottom: var(--space-3);
}
.step h3 { font-size: var(--fs-h3); margin-bottom: var(--space-1); }
.step p { font-size: var(--fs-body); color: var(--text-secondary); }

/* Features / capabilities */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}
.feature-column h3 {
  font-size: var(--fs-h3);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-light);
}
.feature-column ul { display: flex; flex-direction: column; gap: var(--space-2); }
.feature-column li {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  padding-left: 26px;
  position: relative;
}
.feature-column li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.5em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* About */
.about-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  min-height: 440px;
}
.about-visual {
  position: relative;
  overflow: hidden;
  min-height: 360px;
  background: radial-gradient(60% 60% at 50% 50%, rgba(137, 221, 253, 0.07), transparent 70%);
}
#about-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.about-content {
  padding: clamp(2rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.about-content .eyebrow { margin-bottom: var(--space-2); }
.about-content h2 { font-size: var(--fs-h2); margin-bottom: var(--space-3); }
.about-content p {
  color: var(--text-secondary);
  max-width: 52ch;
  margin-bottom: var(--space-2);
}
.about-content .btn { align-self: flex-start; margin-top: var(--space-3); }

/* ============================================================
   Contact
   ============================================================ */

.contact .section-head { margin-inline: auto; text-align: center; }
.contact .section-head p { margin-inline: auto; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 640px;
  margin-inline: auto;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #8b8ea3; }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  background: var(--bg-card-hover);
}
.form-group textarea { resize: vertical; min-height: 130px; }

.form-actions { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.form-note { font-size: var(--fs-small); color: var(--text-muted); }
.form-status { font-size: var(--fs-small); font-weight: 500; min-height: 1.2em; }
.form-status.is-success { color: var(--success); }
.form-status.is-error { color: #f87171; }

/* ============================================================
   Footer
   ============================================================ */

.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-6) var(--space-4);
  margin-top: var(--space-6);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
}
.footer-brand img { height: 30px; margin-bottom: var(--space-3); }
.footer-brand p { font-size: var(--fs-small); color: var(--text-muted); max-width: 34ch; }
.footer-col h4 {
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}
.footer-col a {
  display: block;
  font-size: var(--fs-small);
  color: var(--text-secondary);
  padding-block: 7px;
  transition: color 0.25s ease;
}
.footer-col a:hover { color: var(--accent-soft); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--space-3);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.footer-bottom p { font-size: var(--fs-small); color: var(--text-muted); }

/* ============================================================
   Scroll reveal — progressive enhancement only
   (default = visible; hidden ONLY when JS confirms support)
   ============================================================ */

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}
html.js [data-reveal].revealed { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 980px) {
  .about-inner { grid-template-columns: 1fr; }
  .about-visual { min-height: 240px; order: -1; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .scroll-cue { display: none; }
}

@media (max-width: 768px) {
  :root { --gutter: 1.25rem; }

  .mobile-toggle { display: flex; }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2) var(--gutter) var(--space-3);
    background: rgba(8, 9, 13, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    max-height: calc(100svh - var(--nav-h));
    overflow-y: auto;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s var(--ease-out), visibility 0.3s;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; visibility: visible; }
  .nav-links a:not(.btn) {
    display: flex;
    align-items: center;
    min-height: 52px;
    border-bottom: 1px solid var(--border);
    font-size: 1.02rem;
  }
  .nav-links .btn { margin-top: var(--space-2); min-height: 50px; }

  .hero { min-height: auto; padding-block: calc(var(--nav-h) + var(--space-6)) var(--space-7); }
  .hero-cta .btn { flex: 1 1 auto; }

  .section { padding-block: var(--space-6); }
  .footer-top { grid-template-columns: 1fr; gap: var(--space-4); }
  .footer-bottom { justify-content: center; text-align: center; }
  .footer-col a { padding-block: 11px; }
}

/* Lock background scroll when the mobile menu is open */
body.menu-open { overflow: hidden; }

@media (max-width: 420px) {
  .form-row { grid-template-columns: 1fr; }
}

/* Reduced motion — kill animations, guarantee content visible */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html.js [data-reveal] { opacity: 1 !important; transform: none !important; }
}