/* =========================================================
   Elyon Data — Design System
   Dark, professional, data/tech aesthetic
   ========================================================= */

:root {
  --bg: #0a0f1c;
  --bg-soft: #0d1426;
  --surface: #121a2e;
  --surface-2: #182238;
  --border: #233056;
  --border-soft: #1a2540;

  --text: #e8edf7;
  --muted: #9aa7c7;
  --muted-2: #6b7a9e;

  --accent: #22d3ee;
  --accent-2: #3b82f6;
  --accent-3: #6366f1;
  --accent-grad: linear-gradient(100deg, #22d3ee 0%, #3b82f6 60%, #6366f1 100%);
  --accent-grad-soft: linear-gradient(100deg, rgba(34,211,238,.14), rgba(59,130,246,.10));

  --success: #34d399;
  --warning: #fbbf24;

  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  --shadow: 0 18px 50px -20px rgba(0,0,0,.7);
  --shadow-glow: 0 0 0 1px rgba(34,211,238,.15), 0 20px 60px -25px rgba(59,130,246,.45);

  --container: 1140px;
  --space: clamp(3.5rem, 7vw, 6.5rem);

  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 1.4rem; }
.section { padding-block: var(--space); }
.section--alt { background: var(--bg-soft); }
.section-head { max-width: 720px; margin: 0 auto clamp(2.2rem, 4vw, 3.2rem); text-align: center; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: .9rem;
}
h1, h2, h3, h4 { line-height: 1.18; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { color: var(--muted); }
.lead { font-size: 1.1rem; color: var(--muted); }
.section-head p { margin-top: .9rem; font-size: 1.05rem; }
.text-accent { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem; justify-content: center;
  padding: .85rem 1.5rem; border-radius: 999px; font-weight: 600; font-size: .96rem;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, #22d3ee 0%, #38bdf8 100%); color: #04121b; box-shadow: var(--shadow-glow); }
.btn-primary:hover { box-shadow: 0 0 0 1px rgba(34,211,238,.3), 0 26px 70px -22px rgba(59,130,246,.6); }
.btn-secondary { background: rgba(255,255,255,.03); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); background: rgba(34,211,238,.07); }
.btn-sm { padding: .6rem 1.1rem; font-size: .88rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: .9rem; justify-content: center; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(10,15,28,.72);
  border-bottom: 1px solid var(--border-soft);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; font-size: 1.12rem; letter-spacing: -.01em; }
.brand svg { width: 30px; height: 30px; }
.nav-links { display: flex; align-items: center; gap: .4rem; }
.nav-links a {
  padding: .5rem .85rem; border-radius: 8px; color: var(--muted); font-size: .94rem; font-weight: 500;
  transition: color .15s, background .15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: rgba(255,255,255,.04); }
.nav-cta { display: flex; align-items: center; gap: .8rem; }
.lang-switch {
  font-size: .78rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: .38rem .62rem; border-radius: 8px; border: 1px solid var(--border);
  color: var(--muted); background: rgba(255,255,255,.03); text-decoration: none;
  transition: color .15s, border-color .15s;
}
.lang-switch:hover { color: var(--text); border-color: var(--accent); }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--border); align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { content: ""; display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; position: relative; transition: .25s; }
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Hero ---------- */
.hero { position: relative; padding-block: clamp(3.5rem, 9vw, 7rem); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(620px 420px at 78% -8%, rgba(59,130,246,.20), transparent 60%),
    radial-gradient(520px 360px at 8% 6%, rgba(34,211,238,.16), transparent 55%);
}
.hero-grid { position: absolute; inset: 0; z-index: -2; opacity: .35;
  background-image: linear-gradient(var(--border-soft) 1px, transparent 1px), linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 56px 56px; mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%); }
.hero-inner { max-width: 840px; margin-inline: auto; text-align: center; }
.hero h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); margin-bottom: 1.2rem; }
.hero .lead { font-size: 1.2rem; max-width: 640px; margin: 0 auto 2rem; }
.hero .btn-row { margin-top: 0; }
.hero-badges { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; justify-content: center; margin-top: 2.4rem; color: var(--muted-2); font-size: .86rem; }
.hero-badges span { display: inline-flex; align-items: center; gap: .45rem; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 1.3rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 1.7rem; transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--border); background: var(--surface-2); }
.card .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 1.1rem;
  background: var(--accent-grad-soft); border: 1px solid var(--border); color: var(--accent);
}
.card h3 { margin-bottom: .5rem; }
.card p { font-size: .96rem; }
.card ul.checks { margin-top: 1rem; display: grid; gap: .5rem; }
.card ul.checks li { position: relative; padding-left: 1.6rem; color: var(--muted); font-size: .92rem; }
.card ul.checks li::before { content: ""; position: absolute; left: 0; top: .45em; width: 8px; height: 8px; border-radius: 2px; background: var(--accent-grad); }

/* ---------- How it works ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.3rem; counter-reset: step; }
.step { position: relative; padding: 1.7rem; background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius); }
.step .num { font-family: var(--mono); font-size: .8rem; color: var(--accent); margin-bottom: .7rem; }
.step h3 { margin-bottom: .45rem; font-size: 1.08rem; }
.step p { font-size: .92rem; }

/* ---------- Format chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem; padding: .6rem 1.1rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border-soft); font-weight: 600; font-size: .9rem; color: var(--text);
  font-family: var(--mono);
}
.chip svg { width: 16px; height: 16px; color: var(--accent); }

/* ---------- Credibility ---------- */
.quote { max-width: 760px; margin: 0 auto; text-align: center; }
.quote p { font-size: 1.15rem; color: var(--text); }
.quote .tick { display: inline-flex; align-items: center; gap: .5rem; margin-top: .8rem; color: var(--success); font-weight: 600; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: var(--radius-lg); padding: clamp(2.5rem,5vw,4rem); text-align: center;
  background: linear-gradient(135deg, rgba(34,211,238,.10), rgba(59,130,246,.16)); border: 1px solid var(--border); }
.cta-band::before { content:""; position:absolute; inset:0; z-index:-1; background: var(--accent-grad); opacity:.06; }
.cta-band h2 { margin-bottom: .8rem; }
.cta-band p { max-width: 560px; margin: 0 auto 1.8rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border-soft); background: var(--bg-soft); padding-block: 3.2rem 1.6rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; }
.footer-brand p { font-size: .92rem; margin-top: .9rem; max-width: 300px; }
.footer-col h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted-2); margin-bottom: 1rem; }
.footer-col a { display: block; color: var(--muted); padding: .3rem 0; font-size: .94rem; transition: color .15s; }
.footer-col a:hover { color: var(--accent); }
.social { display: flex; gap: .6rem; margin-top: 1.1rem; }
.social a { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); display: grid; place-items: center; color: var(--muted); transition: .15s; }
.social a:hover { color: var(--accent); border-color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border-soft); margin-top: 2.4rem; padding-top: 1.4rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--muted-2); font-size: .85rem; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding-block: clamp(2.8rem, 6vw, 4.5rem) clamp(2rem,4vw,3rem); position: relative; overflow: hidden; }
.page-hero::before { content:""; position:absolute; inset:0; z-index:-1; background: radial-gradient(560px 320px at 80% 0%, rgba(59,130,246,.16), transparent 60%); }
.page-hero h1 { font-size: clamp(2rem, 4.6vw, 3rem); max-width: 14ch; }
.page-hero .lead { margin-top: 1rem; max-width: 640px; }

/* ---------- Solutions list ---------- */
.service { display: grid; grid-template-columns: 240px 1fr; gap: 2rem; padding: 2rem 0; border-bottom: 1px solid var(--border-soft); }
.service:last-child { border-bottom: none; }
.service h3 { font-size: 1.35rem; margin-bottom: .5rem; }
.service .tag { display:inline-block; font-family: var(--mono); font-size: .78rem; color: var(--accent); margin-bottom: .6rem; }
.service ul.checks { margin-top: .9rem; display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.service ul.checks li { position: relative; padding-left: 1.5rem; color: var(--muted); font-size: .92rem; }
.service ul.checks li::before { content: ""; position: absolute; left: 0; top: .45em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

/* ---------- APIs page ---------- */
.product { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: clamp(1.6rem,3vw,2.4rem); }
.product .badge-early { display:inline-flex; align-items:center; gap:.45rem; padding:.4rem .85rem; border-radius:999px; font-size:.78rem; font-weight:600; background: rgba(251,191,36,.12); border:1px solid rgba(251,191,36,.3); color: var(--warning); }
.fields-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.fields-table th, .fields-table td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--border-soft); font-size: .92rem; }
.fields-table th { color: var(--muted-2); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
.fields-table td code { font-family: var(--mono); color: var(--accent); font-size: .86rem; }
.fields-table tr:last-child td { border-bottom: none; }
.code-block { background: #060a14; border: 1px solid var(--border-soft); border-radius: var(--radius); overflow: hidden; margin-top: 1.2rem; }
.code-head { display: flex; align-items: center; gap: .5rem; padding: .7rem 1rem; border-bottom: 1px solid var(--border-soft); font-family: var(--mono); font-size: .8rem; color: var(--muted-2); }
.code-head .d { width: 11px; height: 11px; border-radius: 50%; background: var(--border); }
.code-block pre { padding: 1.2rem; overflow-x: auto; font-family: var(--mono); font-size: .85rem; line-height: 1.6; color: #c9d6f0; }
.code-block .k { color: #f78c6c; }
.code-block .s { color: #c3e88d; }
.code-block .n { color: #82aaff; }
.code-block .c { color: #5c6b94; font-style: italic; }

/* ---------- Case studies ---------- */
.case { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 2rem; }
.case .case-tag { font-family: var(--mono); font-size: .76rem; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; }
.case h3 { font-size: 1.4rem; margin: .5rem 0 1.4rem; }
.case-block { margin-bottom: 1.1rem; }
.case-block h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted-2); margin-bottom: .35rem; }
.case-block p { font-size: .95rem; }
.case-tech { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .4rem; }
.case-tech span { font-family: var(--mono); font-size: .78rem; padding: .3rem .7rem; border-radius: 6px; background: var(--bg-soft); border: 1px solid var(--border-soft); color: var(--muted); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; align-items: start; }
.principles { display: grid; gap: .8rem; }
.principle { display: flex; gap: .9rem; align-items: flex-start; padding: 1rem; border: 1px solid var(--border-soft); border-radius: var(--radius-sm); background: var(--surface); }
.principle .pi { flex: none; width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; color: var(--accent); background: var(--accent-grad-soft); border: 1px solid var(--border); }
.principle strong { display: block; margin-bottom: .15rem; }
.principle span { font-size: .9rem; color: var(--muted); }

/* ---------- Contact form ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 3rem; align-items: start; }
.form-card { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.field { margin-bottom: 1.1rem; }
.field.full { grid-column: 1 / -1; }
.field label { display: block; font-size: .86rem; font-weight: 600; margin-bottom: .4rem; }
.field label .opt { color: var(--muted-2); font-weight: 400; font-size: .8rem; }
.field input, .field select, .field textarea {
  width: 100%; padding: .8rem .95rem; border-radius: var(--radius-sm); background: var(--bg-soft);
  border: 1px solid var(--border); color: var(--text); font: inherit; font-size: .95rem; transition: border-color .15s, box-shadow .15s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34,211,238,.14); }
.field .err { color: #f87171; font-size: .8rem; margin-top: .35rem; display: none; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: #f87171; }
.field.invalid .err { display: block; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239aa7c7' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .9rem center; padding-right: 2.2rem; }
.form-note { font-size: .82rem; color: var(--muted-2); margin-top: .6rem; }
.form-success { display: none; text-align: center; padding: 2rem 1rem; }
.form-success.show { display: block; }
.form-success .check-ico { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 1.2rem; display: grid; place-items: center; background: rgba(52,211,153,.12); border: 1px solid rgba(52,211,153,.35); color: var(--success); }
.contact-info p { margin-bottom: 1rem; }
.contact-info .info-item { display: flex; gap: .8rem; align-items: center; padding: .8rem 0; border-bottom: 1px solid var(--border-soft); }
.contact-info .info-item:last-child { border-bottom: none; }
.contact-info .info-item .ii { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; color: var(--accent); background: var(--accent-grad-soft); border: 1px solid var(--border); }

/* ---------- 404 ---------- */
.notfound { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.notfound .code { font-family: var(--mono); font-size: clamp(4rem, 16vw, 9rem); font-weight: 800; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } .btn:hover { transform: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .service { grid-template-columns: 1fr; gap: 1rem; }
}
@media (max-width: 760px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: stretch; position: absolute; top: 70px; left: 0; right: 0;
    background: rgba(10,15,28,.98); border-bottom: 1px solid var(--border); padding: .8rem 1.4rem 1.2rem; gap: .2rem;
  }
  .nav-links.open a { padding: .8rem .9rem; font-size: 1rem; }
  .nav-links.open .nav-cta-mobile { display: block; margin-top: .6rem; }
  .grid-2, .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .service ul.checks { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

/* ---------- WhatsApp floating button ---------- */
.wa-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 6px 20px -4px rgba(37, 211, 102, 0.5);
  transition: transform .2s ease, box-shadow .2s ease;
}
.wa-float:hover {
  transform: scale(1.08);
  box-shadow: 0 8px 28px -4px rgba(37, 211, 102, 0.65);
}
.wa-float svg { width: 32px; height: 32px; }
.wa-float::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25D366;
  z-index: -1;
  animation: wa-ring 2.5s ease-out infinite;
}
@keyframes wa-ring {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.7); opacity: 0; }
}
@media (max-width: 760px) {
  .wa-float { width: 54px; height: 54px; bottom: 16px; right: 16px; }
  .wa-float svg { width: 28px; height: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  .wa-float::before { animation: none; opacity: 0; }
}