/* ============================================================
   UNITEGROUP — premium dark UI
   Design system: dark gray + acid green, Soft-UI Evolution
   Type: Lexend (display) / Source Sans 3 (body)
   Motion: Apple-style springs, reveal on scroll
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --bg:            #0a0c0d;
  --bg-2:          #101314;
  --surface:       rgba(255, 255, 255, 0.035);
  --surface-2:     rgba(255, 255, 255, 0.06);
  --border:        rgba(255, 255, 255, 0.09);
  --border-strong: rgba(180, 255, 90, 0.22);

  --text:          #f2f5ef;
  --text-muted:    #a7b0a3;
  --text-dim:      #6b746a;

  --accent:        #b4ff39;
  --accent-2:      #a3e635;
  --accent-deep:   #84cc16;
  --accent-soft:   rgba(180, 255, 57, 0.13);

  --grad-accent:   linear-gradient(120deg, #d4ff5a 0%, #b4ff39 45%, #84cc16 100%);
  --grad-text:     linear-gradient(120deg, #e6ff8a 0%, #b4ff39 45%, #a3e635 100%);

  --radius:   18px;
  --radius-lg:26px;
  --radius-sm:12px;

  --shadow-sm: 0 2px 8px rgba(2, 6, 23, 0.4);
  --shadow-md: 0 16px 40px -12px rgba(2, 6, 23, 0.7);
  --shadow-glow: 0 18px 50px -16px rgba(163, 230, 53, 0.45);

  --container: 1180px;
  --nav-h: 72px;

  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);

  --font-display: "Lexend", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:    "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(132, 204, 22, 0.12), transparent 60%),
    radial-gradient(900px 500px at 0% 10%, rgba(180, 255, 57, 0.07), transparent 55%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 24px; }

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  background: var(--accent); color: #05131f; padding: 10px 18px; border-radius: 10px; font-weight: 600;
}
.skip-link:focus { left: 16px; }

/* ---------- Buttons ---------- */
.btn {
  --pad: 13px 22px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: var(--pad);
  font-family: var(--font-display);
  font-weight: 600; font-size: 15.5px; letter-spacing: -0.01em;
  border: 1px solid transparent; border-radius: 999px;
  transition: transform 0.18s var(--ease-spring), box-shadow 0.25s var(--ease-out),
              background 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn--sm { --pad: 9px 16px; font-size: 14px; }
.btn--lg { --pad: 16px 30px; font-size: 16.5px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--grad-accent); color: #0a1400;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 24px 60px -16px rgba(163, 230, 53, 0.6); }

.btn--ghost {
  background: var(--surface); color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: var(--surface-2); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out), backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(11, 17, 32, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border);
}
.nav__inner { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 24px;
  display: flex; align-items: center; gap: 24px; }

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand__mark { display: grid; place-items: center; filter: drop-shadow(0 6px 14px rgba(163,230,53,0.38)); }
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: 18px; letter-spacing: 0.02em; }

.nav__links { display: flex; gap: 6px; margin-left: 12px; }
.nav__links a {
  padding: 8px 14px; border-radius: 10px; font-size: 15px; color: var(--text-muted); font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav__links a:hover { color: var(--text); background: var(--surface); }

.nav__actions { margin-left: auto; display: flex; align-items: center; gap: 16px; }

.lang { display: inline-flex; padding: 3px; gap: 2px; border: 1px solid var(--border-strong);
  border-radius: 999px; background: var(--surface); }
.lang__btn { padding: 5px 11px; font-family: var(--font-display); font-weight: 600; font-size: 12.5px;
  letter-spacing: 0.03em; color: var(--text-muted); background: none; border: 0; border-radius: 999px;
  transition: color 0.2s, background 0.2s; }
.lang__btn.is-active { color: #0a1400; background: var(--grad-accent); }
.lang__btn:not(.is-active):hover { color: var(--text); }
.lang--mobile { margin: 16px 0 6px; align-self: flex-start; }
.nav__phone { font-family: var(--font-display); font-weight: 600; font-size: 15px; color: var(--text);
  transition: color 0.2s; }
.nav__phone:hover { color: var(--accent); }

.nav__burger { display: none; background: none; border: 0; width: 42px; height: 42px; margin-left: auto;
  position: relative; }
.nav__burger span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform 0.3s var(--ease-spring), opacity 0.2s; }
.nav__burger span:nth-child(1) { top: 14px; }
.nav__burger span:nth-child(2) { top: 20px; }
.nav__burger span:nth-child(3) { top: 26px; }
.nav__burger.is-open span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 90;
  background: rgba(11, 17, 32, 0.96); backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 18px 24px 28px; display: flex; flex-direction: column; gap: 4px;
}
.mobile-menu a { padding: 14px 6px; font-size: 18px; font-weight: 500; color: var(--text-muted);
  border-bottom: 1px solid var(--border); }
.mobile-menu[hidden] { display: none; }
.mobile-menu a:last-child { border: 0; margin-top: 14px; justify-content: center; color: #0a1400; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: clamp(70px, 13vw, 150px) 0 clamp(60px, 9vw, 110px); overflow: hidden; }
.hero__content { position: relative; z-index: 2; max-width: 860px; }

.hero__aurora { position: absolute; inset: -20% -10% auto -10%; height: 120%; z-index: 0; filter: blur(60px); opacity: 0.8; }
.blob { position: absolute; border-radius: 50%; }
.blob--1 { width: 520px; height: 520px; top: -140px; left: -60px;
  background: radial-gradient(circle, rgba(180,255,57,0.42), transparent 68%); animation: drift1 20s ease-in-out infinite; }
.blob--2 { width: 460px; height: 460px; top: -60px; right: -40px;
  background: radial-gradient(circle, rgba(132,204,22,0.4), transparent 68%); animation: drift2 24s ease-in-out infinite; }
.blob--3 { width: 380px; height: 380px; top: 180px; left: 40%;
  background: radial-gradient(circle, rgba(163,230,53,0.3), transparent 70%); animation: drift3 28s ease-in-out infinite; }

@keyframes drift1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(40px, 30px); } }
@keyframes drift2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-50px, 20px); } }
@keyframes drift3 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(30px,-30px) scale(1.08); } }

.hero__grid { position: absolute; inset: 0; z-index: 1; opacity: 0.4;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 78%); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 13.5px;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent);
  padding: 7px 14px; border: 1px solid var(--border-strong); border-radius: 999px;
  background: var(--accent-soft); margin-bottom: 22px;
}
.section__head .eyebrow { margin-bottom: 18px; }

.hero__title {
  font-size: clamp(2.6rem, 6.4vw, 4.6rem);
  line-height: 1.02; letter-spacing: -0.035em; font-weight: 800;
  margin-bottom: 22px;
}
.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero__lead { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--text-muted); max-width: 620px; line-height: 1.55; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero__badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 46px; }
.hero__badges li {
  font-family: var(--font-display); font-size: 14px; font-weight: 500; color: var(--text-muted);
  padding: 8px 16px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface);
}

.scroll-cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 2;
  width: 26px; height: 42px; border: 2px solid var(--border-strong); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; border-radius: 2px;
  background: var(--accent); transform: translateX(-50%); animation: cue 1.8s var(--ease-out) infinite; }
@keyframes cue { 0% { opacity: 0; transform: translate(-50%, 0); } 40% { opacity: 1; } 80%,100% { opacity: 0; transform: translate(-50%, 14px); } }

/* ---------- Stats ---------- */
.stats { padding: 8px 0 4px; }
.stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  padding: 34px; border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), transparent);
  backdrop-filter: blur(10px);
}
.stat { text-align: center; }
.stat__num { font-family: var(--font-display); font-weight: 800; font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1; letter-spacing: -0.03em; background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }
.stat__label { margin-top: 10px; font-size: 14.5px; color: var(--text-muted); }

/* ---------- Sections ---------- */
.section { padding: clamp(72px, 11vw, 130px) 0; position: relative; }
.section--alt { background:
  radial-gradient(900px 500px at 90% 0%, rgba(132,204,22,0.07), transparent 60%), var(--bg-2); }
.section__head { max-width: 680px; margin-bottom: 56px; }
.section__title { font-size: clamp(1.9rem, 3.8vw, 2.85rem); line-height: 1.1; letter-spacing: -0.03em; }
.section__sub { margin-top: 16px; font-size: 1.12rem; color: var(--text-muted); line-height: 1.55; }

/* ---------- Solutions cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  position: relative; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); overflow: hidden;
  transition: transform 0.35s var(--ease-spring), border-color 0.3s, background 0.3s;
}
.card::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad-accent); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity 0.35s; pointer-events: none; }
.card:hover { transform: translateY(-6px); background: var(--surface-2); }
.card:hover::before { opacity: 1; }
.card__icon { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 14px;
  background: var(--accent-soft); border: 1px solid var(--border-strong); margin-bottom: 20px; }
.card__icon svg { width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 1.8; }
.card__title { font-size: 1.35rem; letter-spacing: -0.02em; }
.card__tag { margin-top: 4px; font-size: 13.5px; font-weight: 600; color: var(--accent); font-family: var(--font-display); }
.card__text { margin-top: 14px; font-size: 15.5px; color: var(--text-muted); line-height: 1.55; }
.card__link { display: inline-flex; align-items: center; gap: 6px; margin-top: 20px;
  font-family: var(--font-display); font-weight: 600; font-size: 14.5px; color: var(--text); }
.card__link i { transition: transform 0.25s var(--ease-spring); font-style: normal; }
.card:hover .card__link i { transform: translateX(5px); }

/* ---------- Advantages ---------- */
.adv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv__item { padding: 32px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); transition: transform 0.35s var(--ease-spring), border-color 0.3s; }
.adv__item:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.adv__num { font-family: var(--font-display); font-weight: 800; font-size: 2.4rem; letter-spacing: -0.04em;
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.adv__item h3 { font-size: 1.3rem; margin: 14px 0 10px; letter-spacing: -0.02em; }
.adv__item p { color: var(--text-muted); font-size: 15.5px; line-height: 1.55; }

/* ---------- Process ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; position: relative; }
.process::before { content: ""; position: absolute; top: 6px; left: 6%; right: 6%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-strong) 15%, var(--border-strong) 85%, transparent); }
.process__step { position: relative; padding-top: 34px; }
.process__dot { position: absolute; top: 0; left: 0; width: 14px; height: 14px; border-radius: 50%;
  background: var(--grad-accent); box-shadow: 0 0 0 5px rgba(180,255,57,0.14); }
.process__idx { font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--accent); letter-spacing: 0.04em; }
.process__step h3 { font-size: 1.18rem; margin: 8px 0 8px; letter-spacing: -0.02em; }
.process__step p { color: var(--text-muted); font-size: 15px; line-height: 1.5; }

/* ---------- CTA ---------- */
.cta__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: start; }
.cta .section__title { max-width: 520px; }
.contacts { margin-top: 34px; display: flex; flex-direction: column; gap: 18px; }
.contacts li { display: flex; align-items: center; gap: 14px; font-size: 16px; color: var(--text); }
.contacts a:hover { color: var(--accent); }
.contacts__ic { flex: none; width: 42px; height: 42px; display: grid; place-items: center; border-radius: 11px;
  background: var(--accent-soft); border: 1px solid var(--border); }
.contacts__ic svg { width: 20px; height: 20px; fill: none; stroke: var(--accent); stroke-width: 1.7; }

.cta__form { padding: 34px; border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface)); backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md); }
.field { margin-bottom: 20px; }
.field label { display: block; font-family: var(--font-display); font-weight: 600; font-size: 14.5px; margin-bottom: 8px; }
.field label span { color: var(--accent); }
.field input {
  width: 100%; padding: 14px 16px; font-size: 16px; font-family: var(--font-body); color: var(--text);
  background: rgba(2,6,23,0.4); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input::placeholder { color: var(--text-dim); }
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); background: rgba(2,6,23,0.6); }
.field.is-invalid input { border-color: #f87171; box-shadow: 0 0 0 4px rgba(248,113,113,0.14); }
.field__err { min-height: 0; font-size: 13px; color: #fca5a5; margin-top: 6px; }
.field.is-invalid .field__err::before { content: attr(data-msg); }
.cta__note { margin-top: 16px; font-size: 12.5px; color: var(--text-dim); text-align: center; line-height: 1.5; }
.cta__success { margin-top: 16px; padding: 14px; text-align: center; font-weight: 600;
  color: #6ee7b7; background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.3); border-radius: var(--radius-sm); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 60px 0 30px; }
.footer__inner { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer__brand p { margin-top: 16px; color: var(--text-muted); font-size: 15px; line-height: 1.55; max-width: 320px; }
.footer__col h4 { font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 16px; }
.footer__col a { display: block; color: var(--text-muted); font-size: 15px; padding: 5px 0; transition: color 0.2s; }
.footer__col a:hover { color: var(--accent); }
.footer__bottom { margin-top: 46px; padding-top: 24px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--text-dim); font-size: 13.5px; }

/* ---------- Reveal animations (per-section) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease-out), transform 0.8s var(--ease-spring), filter 0.75s var(--ease-out);
  will-change: opacity, transform, filter;
}

/* Hero — rise up */
#hero .reveal { transform: translateY(30px); }

/* Stats — pop / scale in */
.stats .reveal { transform: scale(0.86); }

/* Solutions — 3D flip up (cards), header rises */
#solutions .section__head.reveal { transform: translateY(24px); }
#solutions .cards .reveal { transform: perspective(900px) rotateX(-18deg) translateY(24px); transform-origin: 50% 0%; }

/* Advantages — focus / blur in */
#advantages .reveal { filter: blur(12px); transform: translateY(14px) scale(0.98); }

/* Process — slide in from the left */
#process .reveal { transform: translateX(-42px); }

/* Contact — split: info from left, form from right */
#contact .cta__info.reveal { transform: translateX(-44px); }
#contact .cta__form.reveal { transform: translateX(44px); }

.reveal.is-visible { opacity: 1 !important; transform: none !important; filter: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .process::before { display: none; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav__links, .nav__actions { display: none; }
  .nav__burger { display: block; }
  .adv { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 28px 18px; padding: 28px; }
  .cta__grid { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .container { padding-inline: 18px; }
  .cards { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 30px; }
  .btn--lg { --pad: 15px 24px; }
  .hero__cta .btn { width: 100%; }
}

/* ---------- Reduced motion / transparency ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; filter: none !important; transition: none; }
  .blob, .scroll-cue span { animation: none; }
  .btn, .card, .adv__item { transition: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .nav.is-scrolled, .mobile-menu, .stats__grid, .cta__form { backdrop-filter: none; }
}