/* =========================================================
   IVN Advantage — Shared Stylesheet
   Palette: Deep navy + electric cyan
   ========================================================= */

:root {
  --navy-900: #07111F;
  --navy-800: #0B1A2E;
  --navy-700: #122541;
  --navy-600: #1B3358;
  --cyan-500: #00E5FF;
  --cyan-400: #5BF0FF;
  --cyan-600: #00B8CC;
  --ink: #E8EEF7;
  --ink-dim: #A8B4C7;
  --ink-faint: #6E7A8F;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --surface: #0F1C33;
  --surface-2: #142944;
  --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --max-w: 1200px;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--navy-900);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background atmosphere */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(0, 229, 255, 0.05), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

a { color: var(--cyan-500); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--cyan-400); }

img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #fff;
}

h1 { font-size: clamp(2.5rem, 5.5vw, 4.5rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.85rem, 3.4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p { color: var(--ink-dim); }
.lead { font-size: 1.15rem; color: var(--ink); max-width: 60ch; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-500);
  padding: 6px 14px;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.06);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 8px var(--cyan-500);
}

.gradient-text {
  background: linear-gradient(120deg, #fff 30%, var(--cyan-500) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: clamp(64px, 9vw, 120px) 0; position: relative; }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head p { margin-top: 18px; font-size: 1.05rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 17, 31, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: #fff;
}
.brand-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan-500), var(--cyan-600));
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--navy-900);
  font-size: 0.9rem;
  box-shadow: var(--shadow-glow);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a:not(.btn) {
  color: var(--ink-dim);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.nav-links a:not(.btn):hover, .nav-links a:not(.btn).active { color: #fff; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--cyan-500);
  border-radius: 2px;
}
.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  width: 42px; height: 42px;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 10px; right: 10px;
  height: 2px;
  background: #fff;
  transition: transform .25s var(--ease), opacity .2s;
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s, color .2s, box-shadow .25s;
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
}
.btn-primary {
  background: var(--cyan-500);
  color: #000;
  font-weight: 800;
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
  text-rendering: geometricPrecision;
  box-shadow: 0 8px 28px rgba(0, 229, 255, 0.25);
}
.btn-primary:hover {
  background: var(--cyan-400);
  color: #000;
  transform: translateY(-1px);
  box-shadow: 0 14px 36px rgba(0, 229, 255, 0.35);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  border-color: var(--cyan-500);
  color: var(--cyan-500);
}
.btn-arrow::after {
  content: "→";
  transition: transform .2s var(--ease);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ---------- Hero ---------- */
.hero {
  padding: clamp(80px, 11vw, 160px) 0 clamp(64px, 8vw, 120px);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  width: 520px; height: 520px;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0, 229, 255, 0.25), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 880px; margin: 0 auto; text-align: center; }
.hero h1 { margin: 24px 0 24px; }
.hero .lead { margin: 0 auto 36px; font-size: 1.2rem; }
.hero-actions { display: inline-flex; gap: 14px; flex-wrap: wrap; justify-content: center; }
.hero-meta {
  margin-top: 56px;
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta span::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--cyan-500);
  border-radius: 50%;
}

/* ---------- Cards / Grids ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: linear-gradient(180deg, var(--surface), var(--navy-800));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(0, 229, 255, 0.10), transparent 40%);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 229, 255, 0.1);
}
.card:hover::before { opacity: 1; }

.card .icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(0, 229, 255, 0.05));
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  color: var(--cyan-500);
}
.card .icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.97rem; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--cyan-500);
}
.card-link::after { content: "→"; transition: transform .2s var(--ease); }
.card-link:hover::after { transform: translateX(4px); }

/* ---------- Stats strip ---------- */
.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
}
.stats .grid-4 { gap: 24px; }
.stat-item { text-align: left; }
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  font-weight: 700;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff, var(--cyan-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  margin-top: 10px;
  color: var(--ink-faint);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- Feature row ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-row.flip { grid-template-columns: 1fr 1.1fr; }
.feature-row.flip .feature-visual { order: -1; }
.feature-row + .feature-row { margin-top: 80px; }
.feature-row h2 { margin-bottom: 18px; }
.feature-list { list-style: none; margin-top: 24px; }
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  color: var(--ink);
  border-top: 1px solid var(--line);
}
.feature-list li:first-child { border-top: none; }
.feature-list li::before {
  content: "";
  flex: none;
  width: 18px; height: 18px;
  margin-top: 4px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.15);
  border: 1px solid var(--cyan-500);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300E5FF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}

.feature-visual {
  background: linear-gradient(160deg, var(--surface-2), var(--navy-700));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  min-height: 320px;
}
.feature-visual::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.4), transparent 50%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ---------- CTA Band ---------- */
.cta-band {
  margin: 0;
  padding: clamp(64px, 8vw, 96px) 0;
  position: relative;
  overflow: hidden;
}
.cta-band-inner {
  background: linear-gradient(135deg, var(--navy-700), var(--navy-800));
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: clamp(48px, 6vw, 72px);
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta-band-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 0% 50%, rgba(0, 229, 255, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 80% at 100% 50%, rgba(0, 229, 255, 0.12), transparent 60%);
  pointer-events: none;
}
.cta-band-inner > * { position: relative; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { max-width: 560px; margin: 0 auto 30px; }

/* ---------- Logo / Trust strip ---------- */
.trust-strip {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.trust-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  opacity: 0.7;
}
.trust-label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.trust-tile {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink-dim);
  letter-spacing: 0.04em;
}

/* ---------- Process steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--cyan-500);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 14px;
}
.step h4 { margin-bottom: 8px; color: #fff; }
.step p { font-size: 0.92rem; }

/* ---------- Page hero (subpages) ---------- */
.page-hero {
  padding: clamp(80px, 9vw, 130px) 0 clamp(40px, 5vw, 60px);
  text-align: center;
  position: relative;
}
.page-hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.6rem); margin: 18px 0 18px; }
.page-hero p { max-width: 640px; margin: 0 auto; font-size: 1.05rem; }

/* ---------- About specifics ---------- */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  background: linear-gradient(180deg, var(--surface), transparent);
}
.value h3 { margin-bottom: 10px; }

/* ---------- Contact specifics ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info {
  background: linear-gradient(180deg, var(--surface), var(--navy-800));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-info h3 { margin-bottom: 8px; }
.contact-info dl { margin-top: 28px; }
.contact-info dt {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin-top: 18px;
}
.contact-info dd { color: #fff; font-size: 1rem; margin-top: 4px; }

.form { display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 14px 16px;
  background: var(--navy-800);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--cyan-500);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.15);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-success {
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--cyan-400);
  display: none;
}
.form-success.show { display: block; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 56px 0 32px;
  margin-top: 0;
  background: var(--navy-900);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-grid h5 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 16px;
}
.footer-grid ul { list-style: none; display: grid; gap: 10px; }
.footer-grid a { color: var(--ink-dim); font-size: 0.95rem; }
.footer-grid a:hover { color: #fff; }
.footer-brand p {
  margin-top: 14px;
  max-width: 320px;
  font-size: 0.95rem;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row, .feature-row.flip { grid-template-columns: 1fr; gap: 36px; }
  .feature-row.flip .feature-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--navy-900);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform .25s var(--ease), opacity .2s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links li { border-top: 1px solid var(--line); }
  .nav-links li:first-child { border-top: none; }
  .nav-links a { display: block; padding: 14px 8px; }
  .nav-cta { margin: 12px 0 4px; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-meta { gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

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