/* =========================================================
   IntelliWave — landing page styles
   Edit the tokens in :root to re-theme the whole site.
   ========================================================= */
:root {
  --bg: #0b1020;
  --bg-alt: #0f1630;
  --surface: #141c3a;
  --surface-2: #1a2448;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf8;
  --muted: #9aa5c4;
  --primary: #5b8cff;
  --accent: #22d3ee;
  --gradient: linear-gradient(120deg, var(--primary), var(--accent));
  --radius: 16px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --max: 1180px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .6em; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 820px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

.skip-link { position: absolute; left: -999px; top: 8px; background: var(--primary); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 8px; }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 1rem;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--gradient); color: #06101f; box-shadow: 0 8px 24px rgba(91, 140, 255, .35); }
.btn-primary:hover { box-shadow: 0 12px 32px rgba(34, 211, 238, .4); }
.btn-ghost { border-color: var(--border); background: rgba(255,255,255,.04); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.08); }
.btn-sm { padding: 10px 20px; font-size: .9rem; }
.btn-block { width: 100%; }
.btn:focus-visible, a:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(11, 16, 32, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 500; letter-spacing: -.01em; }
.logo strong { font-weight: 800; }
.logo-mark { width: 34px; height: 34px; }
.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-menu a:not(.btn) { color: var(--muted); font-weight: 500; font-size: .95rem; transition: color .2s; }
.nav-menu a:not(.btn):hover { color: var(--text); }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: transform .3s, opacity .3s; }
.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; min-height: 100vh; display: flex; align-items: center; padding: 140px 0 120px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.blob-1 { width: 520px; height: 520px; background: #3b5bdb; top: -120px; right: -100px; animation: float 14s ease-in-out infinite; }
.blob-2 { width: 420px; height: 420px; background: #0e9fb8; bottom: -80px; left: -120px; animation: float 18s ease-in-out infinite reverse; }
.waves { position: absolute; bottom: 0; left: 0; width: 100%; height: 220px; }
.waves path:nth-child(1) { fill: rgba(91, 140, 255, .08); }
.waves path:nth-child(2) { fill: rgba(34, 211, 238, .07); }
@keyframes float { 50% { transform: translate(40px, 30px) scale(1.06); } }

.hero-inner { position: relative; z-index: 1; max-width: 900px; text-align: center; }
.lead { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); max-width: 680px; margin: 0 auto 2.2rem; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-points { list-style: none; padding: 0; margin: 2.8rem 0 0; display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; color: var(--muted); font-size: .95rem; }
.hero-points li::before { content: "✓"; color: var(--accent); font-weight: 700; margin-right: 8px; }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-sub { color: var(--muted); font-size: 1.1rem; }

.grid { display: grid; gap: 24px; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-6px); border-color: rgba(91, 140, 255, .45); box-shadow: var(--shadow); }
.card p { color: var(--muted); margin: 0; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 22px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(91,140,255,.18), rgba(34,211,238,.18));
}
.card-icon svg { width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Approach ---------- */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 72px; align-items: center; }
.split-text p { color: var(--muted); font-size: 1.1rem; margin-bottom: 2rem; }
.feature-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.feature-list li { display: flex; gap: 20px; padding: 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.feature-list h3 { margin-bottom: .3em; }
.feature-list p { color: var(--muted); margin: 0; }
.feature-num { font-weight: 800; font-size: 1.4rem; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; min-width: 36px; }

/* ---------- Process ---------- */
.process { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.process::before { content: ""; position: absolute; top: 26px; left: 12%; right: 12%; height: 2px; background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent); opacity: .5; }
.process li { text-align: center; position: relative; }
.process p { color: var(--muted); }
.step-dot {
  width: 54px; height: 54px; border-radius: 50%; margin: 0 auto 22px;
  display: grid; place-items: center; font-weight: 800; font-size: 1.2rem;
  background: var(--bg); border: 2px solid var(--primary); color: var(--text);
  box-shadow: 0 0 0 6px var(--bg), 0 0 24px rgba(91, 140, 255, .45);
  position: relative; z-index: 1;
}

/* ---------- Tech ---------- */
.tech-groups { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.tech-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.tech-group h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin-bottom: 16px; }
.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { padding: 6px 12px; border-radius: 999px; background: var(--surface-2); font-size: .85rem; color: var(--text); border: 1px solid var(--border); }

/* ---------- Industries ---------- */
.industry {
  display: flex; align-items: center; gap: 14px;
  padding: 22px 24px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  font-weight: 600; transition: border-color .2s, transform .2s;
}
.industry:hover { border-color: rgba(34, 211, 238, .5); transform: translateY(-3px); }
.industry span { font-size: 1.6rem; }

/* ---------- Plans ---------- */
.plan h3 { font-size: 1.4rem; }
.plan > p { margin-bottom: 1.4rem; }
.plan-featured { border-color: rgba(91, 140, 255, .6); background: linear-gradient(180deg, rgba(91,140,255,.12), var(--surface) 60%); }
.badge { position: absolute; top: -12px; right: 24px; background: var(--gradient); color: #06101f; font-size: .75rem; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { color: var(--text); font-size: .95rem; }
.checks li::before { content: "✓"; color: var(--accent); font-weight: 700; margin-right: 10px; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 14px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 0 24px; transition: border-color .2s; }
.faq details[open] { border-color: rgba(91, 140, 255, .45); }
.faq summary { cursor: pointer; list-style: none; padding: 22px 0; font-weight: 600; font-size: 1.05rem; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; color: var(--accent); transition: transform .25s; flex-shrink: 0; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 22px; margin: 0; }

/* ---------- Contact ---------- */
.contact { background: radial-gradient(ellipse at top right, rgba(91,140,255,.18), transparent 60%), var(--bg-alt); }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact-text > p { color: var(--muted); font-size: 1.1rem; }
.contact-list { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 14px; }
.contact-list li { display: flex; align-items: center; gap: 12px; }
.contact-list a { color: var(--accent); font-weight: 600; }

.contact-form { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 36px; display: grid; gap: 18px; box-shadow: var(--shadow); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label { display: grid; gap: 8px; font-size: .9rem; font-weight: 600; }
.optional { color: var(--muted); font-weight: 400; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 13px 16px; border-radius: 10px; font: inherit; font-weight: 400;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  transition: border-color .2s;
}
.contact-form textarea { resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--primary); }
.contact-form .invalid { border-color: #f87171; }
.hp { position: absolute; left: -9999px; }
.form-status { margin: 0; font-size: .95rem; min-height: 1.4em; }
.form-status.ok { color: #4ade80; }
.form-status.err { color: #f87171; }

/* ---------- Footer ---------- */
.site-footer { padding: 48px 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.footer-inner p { margin: 6px 0 0; }
.footer-links { display: flex; gap: 24px; color: var(--muted); }
.footer-links a:hover { color: var(--text); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .tech-groups { grid-template-columns: repeat(3, 1fr); }
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .split, .contact-inner { grid-template-columns: 1fr; gap: 48px; }
  .process { grid-template-columns: 1fr 1fr; }
  .process::before { display: none; }

  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(11, 16, 32, .97); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 24px;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: transform .25s ease, opacity .25s ease, visibility .25s;
  }
  .nav-menu.open { transform: none; opacity: 1; visibility: visible; }
  .nav-menu a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--border); font-size: 1.05rem; }
  .nav-menu .btn { margin-top: 16px; }
  .site-header.menu-open { background: rgba(11, 16, 32, .97); }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 80px 0; }
  .cards-3, .cards-4, .process, .tech-groups, .field-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .hero { padding: 120px 0 100px; }
  .hero-points { flex-direction: column; gap: 10px; align-items: center; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}