/* ============================================
   ДЕЛЬТА СОФТ ГРУПП — Dark Edition
   Вдохновлено DeFi-стилем: тёмный фон,
   синие glow-эффекты, glassmorphism
   ============================================ */

:root {
  --bg:       #080b10;
  --surface:  #0e1420;
  --surface2: #121929;
  --border:   rgba(255,255,255,0.07);
  --border2:  rgba(255,255,255,0.12);
  --white:    #ffffff;
  --muted:    rgba(255,255,255,0.42);
  --dim:      rgba(255,255,255,0.16);
  --blue:     #4d8ef0;
  --blue-dim: rgba(77,142,240,0.18);
  --blue-glow:rgba(77,142,240,0.22);
  --accent:   #7eb8ff;
  --fh: 'Syne', sans-serif;
  --fb: 'Inter', sans-serif;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { background:var(--bg); color:var(--white); font-family:var(--fb); overflow-x:hidden; }
a { color:inherit; text-decoration:none; }
button { cursor:pointer; border:none; font-family:var(--fb); }

/* ---- NAV ---- */
.nav {
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center;
  padding:0 28px; height:58px;
  background:rgba(8,11,16,0.75);
  backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  gap:16px;
}
.nav-logo {
  display:flex; align-items:center; gap:10px;
  font-family:var(--fh); font-size:14px; font-weight:700;
  letter-spacing:-0.3px; flex-shrink:0;
}
.nav-links {
  display:flex; align-items:center; gap:4px;
  padding:5px 12px;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border);
  border-radius:100px; flex:1; justify-content:center;
}
.nav-links a {
  font-size:12px; color:var(--muted); padding:4px 10px;
  border-radius:100px; transition:all 0.2s;
}
.nav-links a:hover { color:var(--white); background:rgba(255,255,255,0.06); }
.nav-cta {
  padding:8px 18px; border-radius:100px;
  background:var(--blue); color:var(--white);
  font-size:12px; font-weight:600;
  transition:all 0.2s; flex-shrink:0;
}
.nav-cta:hover { background:#6aa3f5; }

.burger {
  display:none; flex-direction:column; gap:5px;
  background:none; padding:4px; margin-left:auto;
}
.burger span { display:block; width:22px; height:2px; background:var(--white); border-radius:2px; }
.mobile-menu {
  display:none; flex-direction:column;
  position:fixed; top:58px; left:0; right:0;
  background:rgba(8,11,16,0.97); backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border); z-index:99;
  padding:8px 0;
}
.mobile-menu.open { display:flex; }
.mobile-menu a { padding:14px 28px; font-size:14px; border-bottom:1px solid var(--border); color:var(--muted); }

/* ---- HERO ---- */
.hero {
  position:relative;
  display:flex; flex-direction:column; align-items:center;
  padding:58px 0 60px; overflow:hidden;
  background:radial-gradient(ellipse 100% 80% at 50% 35%, #0d1f3a 0%, #0a1220 50%, #080b10 100%);
}

.hero-glow-center {
  position:absolute; top:0; left:50%; transform:translateX(-50%);
  width:800px; height:550px; border-radius:50%;
  background:radial-gradient(ellipse, rgba(60,110,220,0.16) 0%, transparent 70%);
  pointer-events:none;
}
.hero-glow-left {
  position:absolute; top:20%; left:-100px;
  width:400px; height:400px; border-radius:50%;
  background:radial-gradient(ellipse, rgba(40,79,160,0.10) 0%, transparent 70%);
  pointer-events:none;
}
.hero-glow-right {
  position:absolute; top:30%; right:-80px;
  width:350px; height:350px; border-radius:50%;
  background:radial-gradient(ellipse, rgba(50,90,180,0.08) 0%, transparent 70%);
  pointer-events:none;
}

.hero-lines {
  position:absolute; inset:0; width:100%; height:100%;
  pointer-events:none;
}

.node {
  position:absolute; text-align:center;
  font-size:11px; color:var(--muted);
  animation:float 7s ease-in-out infinite;
  z-index:2;
}
.node:nth-child(even) { animation-delay:3s; }
.node-icon { font-size:13px; color:var(--dim); margin-bottom:4px; }
.node-name { color:rgba(255,255,255,0.6); font-size:11px; margin-bottom:2px; }
.node-val { font-size:10px; color:var(--muted); }

@keyframes float {
  0%,100% { transform:translateY(0); }
  50% { transform:translateY(-10px); }
}

.hero-pill {
  display:inline-flex; align-items:center; gap:8px;
  padding:7px 18px;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:100px; font-size:12px; color:rgba(255,255,255,0.65);
  margin-top:56px; position:relative; z-index:2;
  animation:fadeUp 0.5s ease 0.1s both;
}
.pill-dot {
  width:6px; height:6px; border-radius:50%;
  background:var(--blue); box-shadow:0 0 8px var(--blue); flex-shrink:0;
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; box-shadow:0 0 8px var(--blue); }
  50% { opacity:0.7; box-shadow:0 0 16px var(--blue); }
}

.hero-body {
  position:relative; z-index:2; text-align:center;
  max-width:760px; padding:0 24px; margin-top:28px;
  animation:fadeUp 0.6s ease 0.2s both;
}
.hero-body h1 {
  font-family:var(--fh);
  font-size:clamp(2.6rem, 6vw, 4.2rem);
  font-weight:800; line-height:1.08; letter-spacing:-1.5px;
}
.hero-body .accent {
  background:linear-gradient(90deg, var(--blue), var(--accent));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-body p {
  font-size:16px; color:var(--muted); margin-top:20px; line-height:1.7;
}
.hero-actions {
  display:flex; gap:12px; justify-content:center; margin-top:32px;
  flex-wrap:wrap;
}
.btn-open {
  padding:12px 26px; border-radius:100px;
  background:var(--blue); color:var(--white);
  font-size:14px; font-weight:600;
  transition:all 0.2s;
}
.btn-open:hover { background:#6aa3f5; transform:translateY(-2px); box-shadow:0 8px 24px rgba(77,142,240,0.3); }
.btn-discover {
  padding:12px 26px; border-radius:100px;
  background:rgba(255,255,255,0.07);
  border:1px solid var(--border2);
  color:var(--white); font-size:14px; font-weight:500;
  transition:all 0.2s;
}
.btn-discover:hover { background:rgba(255,255,255,0.12); }

/* Hero stats */
.hero-stats {
  display:flex; align-items:center; gap:0;
  margin-top:28px; position:relative; z-index:2;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border); border-radius:16px;
  overflow:hidden;
  animation:fadeUp 0.6s ease 0.3s both;
}
.hs-item {
  display:flex; flex-direction:column; align-items:center;
  padding:20px 36px; gap:4px;
}
.hs-num {
  font-family:var(--fh); font-size:26px; font-weight:800;
  color:var(--accent);
}
.hs-lbl { font-size:11px; color:var(--muted); }
.hs-sep { width:1px; height:40px; background:var(--border); }

.hero-footer-row {
  display:none;
}
.scroll-hint { display:flex; align-items:center; gap:10px; }
.scroll-btn {
  width:30px; height:30px; border-radius:50%;
  border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,0.04);
}
.scroll-hint span { font-size:11px; color:var(--muted); }
.defi-tag { font-size:11px; color:var(--muted); text-align:right; }
.defi-bar { width:36px; height:2px; background:rgba(77,142,240,0.4); margin-top:6px; margin-left:auto; }

@keyframes fadeUp {
  from { opacity:0; transform:translateY(20px); }
  to   { opacity:1; transform:translateY(0); }
}



/* ---- SECTIONS ---- */
.section { padding:96px 40px; max-width:1160px; margin:0 auto; }
#services { padding-top:48px; }
.section-dark-full { padding:96px 40px; max-width:100%; background:var(--surface); }
.section-dark-full .container { max-width:1160px; margin:0 auto; padding:0 40px; }

.section-label {
  font-size:10px; font-weight:600; letter-spacing:2.5px; text-transform:uppercase;
  color:var(--blue); margin-bottom:12px;
  display:inline-flex; align-items:center; gap:8px;
}
.section-label::before { content:''; width:20px; height:1px; background:var(--blue); }
.section-label.light { color:var(--accent); }
.section-label.light::before { background:var(--accent); }

.section-title {
  font-family:var(--fh);
  font-size:clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight:800; line-height:1.1; letter-spacing:-0.5px;
  margin-bottom:48px;
}
#about .section-title { margin-bottom:24px; }
.section-sub { color:var(--muted); font-size:15px; margin-top:-32px; margin-bottom:48px; }

/* ---- SERVICES ---- */
.services-grid {
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:14px;
}
.scard {
  background:var(--surface); border:1px solid var(--border);
  border-radius:18px; padding:28px 24px;
  position:relative; overflow:hidden;
  transition:all 0.25s;
}
.scard:hover { border-color:rgba(77,142,240,0.3); transform:translateY(-3px); }
.scard-wide { grid-column:span 1; }
.scard-dark-accent { background:var(--surface2); }
.scard-glow {
  position:absolute; top:-30px; right:-30px;
  width:150px; height:150px; border-radius:50%;
  background:radial-gradient(ellipse, rgba(77,142,240,0.15) 0%, transparent 70%);
  pointer-events:none;
}
.scard::before {
  content:''; position:absolute; top:0; left:0; right:0; height:2px;
  background:linear-gradient(90deg, var(--blue), transparent);
  opacity:0; transition:opacity 0.3s;
}
.scard:hover::before { opacity:1; }
.scard-num {
  font-family:var(--fh); font-size:10px; font-weight:700;
  color:var(--blue); letter-spacing:1.5px; margin-bottom:14px;
}
.scard h3 { font-family:var(--fh); font-size:16px; font-weight:700; margin-bottom:10px; }
.scard p { font-size:13px; color:var(--muted); line-height:1.65; margin-bottom:16px; }
.scard-tags { display:flex; flex-wrap:wrap; gap:6px; }
.scard-tags span {
  padding:4px 10px; border-radius:100px;
  background:rgba(77,142,240,0.10); border:1px solid rgba(77,142,240,0.2);
  font-size:11px; color:var(--accent);
}

/* ---- QA ---- */
.qa-grid {
  display:grid; grid-template-columns:repeat(4,1fr); gap:14px;
  margin-bottom:40px;
}
.qa-card {
  background:var(--surface2); border:1px solid var(--border);
  border-radius:16px; padding:24px 20px;
  transition:all 0.25s;
}
.qa-card:hover { border-color:rgba(77,142,240,0.25); }
.qa-icon { font-size:20px; color:var(--blue); margin-bottom:12px; }
.qa-card h4 { font-family:var(--fh); font-size:14px; font-weight:700; margin-bottom:8px; }
.qa-card p { font-size:12px; color:var(--muted); line-height:1.6; }

.qa-stats {
  display:flex; align-items:center; gap:32px;
  background:var(--surface2); border:1px solid var(--border);
  border-radius:16px; padding:28px 32px;
}
.qs-big { font-family:var(--fh); font-size:40px; font-weight:800; color:var(--white); display:block; }
.qs-lbl { font-size:12px; color:var(--muted); display:block; margin-top:4px; }
.qa-chart {
  flex:1; display:flex; align-items:flex-end; gap:5px; height:72px;
}
.qbar { flex:1; background:rgba(255,255,255,0.09); border-radius:3px 3px 0 0; }
.qbar-hi { background:rgba(77,142,240,0.6); }

/* ---- STACK ---- */
.stack-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
}
.stack-group {
  background:var(--surface); border:1px solid var(--border);
  border-radius:16px; padding:24px 22px;
}
.sg-label {
  font-size:10px; font-weight:600; letter-spacing:2px; text-transform:uppercase;
  color:var(--muted); margin-bottom:14px;
}
.tags { display:flex; flex-wrap:wrap; gap:7px; }
.tags span {
  padding:5px 12px; border-radius:100px;
  background:rgba(255,255,255,0.05); border:1px solid var(--border);
  font-size:12px; color:rgba(255,255,255,0.75);
  transition:all 0.2s;
}
.tags span:hover { background:var(--blue-dim); border-color:rgba(77,142,240,0.3); color:var(--accent); }

/* ---- PRICING ---- */
.pricing-grid {
  display:grid; grid-template-columns:repeat(4,1fr); gap:12px;
}
.pcard {
  background:var(--surface2); border:1.5px solid var(--border);
  border-radius:14px; padding:22px 18px;
  transition:all 0.2s; cursor:pointer;
}
.pcard:hover { border-color:rgba(77,142,240,0.35); background:rgba(77,142,240,0.05); }
.pcard.active { background:var(--blue); border-color:var(--blue); transform:translateY(-2px); box-shadow:0 8px 24px rgba(77,142,240,0.3); }
.pcard.active .pc-role { color:rgba(255,255,255,0.65); }
.pcard.active .pc-price { color:var(--white); }
.pcard.active .pc-price span { color:rgba(255,255,255,0.5); }
.pcard-accent { background:var(--blue); border-color:var(--blue); }
.pcard-accent .pc-role { color:rgba(255,255,255,0.65); }
.pcard-accent .pc-price { color:var(--white); }
.pcard-accent .pc-price span { color:rgba(255,255,255,0.5); }
.pc-role { font-size:12px; color:var(--muted); margin-bottom:10px; }
.pc-price { font-family:var(--fh); font-size:16px; font-weight:700; }
.pc-price span { font-size:11px; font-weight:400; color:var(--muted); }

/* ---- ABOUT ---- */
.about-layout { display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:stretch; }
.about-left { display:flex; flex-direction:column; }
.about-left .about-req { flex:1; }
.about-left p { font-size:14px; color:var(--muted); line-height:1.8; margin-bottom:16px; text-align:justify; }
.about-req {
  margin-top:28px; padding:22px;
  background:var(--surface); border:1px solid var(--border); border-radius:14px;
}
.req-title { font-size:10px; letter-spacing:2px; text-transform:uppercase; color:var(--dim); margin-bottom:14px; }
.req-list { display:flex; flex-direction:column; gap:10px; }
.req-row { display:flex; flex-direction:column; gap:2px; }
.req-row span { font-size:10px; color:var(--dim); text-transform:uppercase; letter-spacing:0.5px; }
.req-row strong { font-size:12px; color:rgba(255,255,255,0.8); font-weight:500; }
.about-right { display:grid; grid-template-rows:repeat(4, 1fr); gap:12px; }
.acard {
  background:var(--surface); border:1px solid var(--border);
  border-radius:14px; padding:22px 20px; transition:all 0.2s;
  display:flex; flex-direction:column; justify-content:center;
}
.acard:hover { border-color:rgba(77,142,240,0.25); }
.acard-num { font-family:var(--fh); font-size:10px; font-weight:700; color:var(--blue); letter-spacing:1px; margin-bottom:8px; }
.acard h4 { font-size:14px; font-weight:600; margin-bottom:6px; }
.acard p { font-size:12px; color:var(--muted); line-height:1.55; }

/* ---- CONTACTS ---- */
.contacts-layout { display:grid; grid-template-columns:1fr 1.5fr; gap:56px; align-items:start; }
.contacts-left { display:flex; flex-direction:column; gap:24px; }
.cinfo-item { display:flex; align-items:flex-start; gap:14px; }
.ci-icon { font-size:18px; color:var(--blue); flex-shrink:0; margin-top:2px; }
.cinfo-item > div { display:flex; flex-direction:column; gap:3px; }
.cinfo-item span { font-size:10px; text-transform:uppercase; letter-spacing:1px; color:var(--muted); }
.cinfo-item a, .cinfo-item strong { font-size:14px; font-weight:500; color:var(--white); }
.cinfo-item a:hover { color:var(--accent); }

.cform { display:flex; flex-direction:column; gap:16px; }
.cf-group { display:flex; flex-direction:column; gap:6px; }
.cf-group label { font-size:12px; color:var(--muted); }
.cf-group input, .cf-group textarea {
  padding:12px 16px;
  background:var(--surface2); border:1px solid var(--border);
  border-radius:10px; color:var(--white); font-family:var(--fb); font-size:14px;
  transition:all 0.2s; resize:vertical;
}
.cf-group input:focus, .cf-group textarea:focus {
  outline:none; border-color:rgba(77,142,240,0.5);
  box-shadow:0 0 0 3px rgba(77,142,240,0.10);
}
.cf-group input::placeholder, .cf-group textarea::placeholder { color:var(--dim); }
.cf-submit {
  padding:13px 28px; border-radius:100px;
  background:var(--blue); color:var(--white);
  font-size:14px; font-weight:600; transition:all 0.2s;
}
.cf-submit:hover { background:#6aa3f5; transform:translateY(-2px); box-shadow:0 8px 24px rgba(77,142,240,0.3); }
.cf-success {
  display:none; padding:12px 16px;
  background:rgba(77,142,240,0.12); color:var(--accent);
  border:1px solid rgba(77,142,240,0.2);
  border-radius:10px; font-size:13px; font-weight:500;
}

/* ---- FOOTER ---- */
.footer { background:#050709; border-top:1px solid var(--border); padding:40px 40px 28px; }
.footer .container { max-width:1160px; margin:0 auto; }
.ft-top {
  display:flex; justify-content:space-between; align-items:center;
  padding-bottom:28px; border-bottom:1px solid var(--border); margin-bottom:20px;
  flex-wrap:wrap; gap:20px;
}
.ft-nav { display:flex; gap:24px; flex-wrap:wrap; }
.ft-nav a { font-size:13px; color:var(--muted); transition:color 0.2s; }
.ft-nav a:hover { color:var(--white); }
.ft-bottom p { font-size:11px; color:var(--dim); line-height:1.7; margin-bottom:3px; }
.ft-copy { margin-top:14px !important; color:rgba(255,255,255,0.15) !important; }

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns:1fr 1fr; }
  .qa-grid { grid-template-columns:1fr 1fr; }
  .pricing-grid { grid-template-columns:1fr 1fr; }
  .stack-grid { grid-template-columns:1fr 1fr; }
}
/* Nav collapses to burger earlier than layout breakpoint to avoid cramped links */
@media (max-width: 900px) {
  .nav-links { display:none; }
  .nav-right { display:none; }
  .burger { display:flex; }
}
@media (max-width: 768px) {
  .section { padding:64px 20px; }
  .section-dark-full { padding:64px 20px; }
  /* Remove inner container padding — section already pads 20px on each side */
  .section-dark-full .container { padding:0; }
  /* Prevent hero-body from overflowing viewport on narrow screens */
  .hero-body { width:100%; }
  .services-grid { grid-template-columns:1fr; }
  .qa-grid { grid-template-columns:1fr; }
  .stack-grid { grid-template-columns:1fr; }
  .pricing-grid { grid-template-columns:1fr 1fr; }
  .about-layout { grid-template-columns:1fr; }
  .contacts-layout { grid-template-columns:1fr; }
  .node { display:none; }
  .hero-stats { flex-wrap:wrap; justify-content:center; }
  .hs-sep { display:none; }
  .hs-item { padding:16px 20px; }
  .hero-footer-row { padding:0 20px; }
  .ft-top { flex-direction:column; align-items:flex-start; }
  .footer { padding:32px 20px 20px; }
  .qa-stats { flex-direction:column; align-items:flex-start; gap:16px; }
}

/* ---- SERVICES BACKGROUND IMAGE ---- */
.section-bg-img {
  position: relative;
}
.section-bg-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('hero-bg.png') center/cover no-repeat;
  filter: blur(1px) brightness(0.22) saturate(0.8);
  z-index: 0;
  border-radius: 0;
}
.section-bg-img > * {
  position: relative;
  z-index: 1;
}

/* Single stat hero-stats - center it */
.hero-stats:has(.hs-item:only-child) {
  padding: 16px 40px;
}

/* ---- CONTACTS SIMPLE (no form) ---- */
.contacts-simple {
  max-width: 640px;
  display: flex; flex-direction: column; gap: 32px;
}
.contacts-desc {
  font-size: 16px; color: var(--muted); line-height: 1.7;
}
.email-cta {
  display: flex; align-items: center; gap: 20px;
  padding: 24px 28px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 16px;
  transition: all 0.25s;
  cursor: pointer;
}
.email-cta:hover {
  border-color: rgba(77,142,240,0.5);
  background: rgba(77,142,240,0.07);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(77,142,240,0.15);
}
.email-icon {
  font-size: 24px; color: var(--blue);
  width: 48px; height: 48px;
  background: rgba(77,142,240,0.12);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.email-text {
  display: flex; flex-direction: column; gap: 4px; flex: 1;
}
.email-label {
  font-size: 12px; color: var(--muted); text-transform: uppercase;
  letter-spacing: 1px; font-weight: 500;
}
.email-addr {
  font-family: var(--fh); font-size: 20px; font-weight: 700;
  color: var(--white);
}
.email-arrow {
  font-size: 22px; color: var(--blue); flex-shrink: 0;
}
.contacts-extra {
  display: flex; gap: 40px; flex-wrap: wrap;
}
.ce-item {
  display: flex; flex-direction: column; gap: 5px;
}
.ce-item span {
  font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--dim);
}
.ce-item strong {
  font-size: 13px; color: rgba(255,255,255,0.75); font-weight: 500;
}

/* ---- HERO PILL SUB ---- */
.hero-pill-sub {
  font-size: 15px;
  color: rgba(255,255,255,0.55);
  margin-top: 10px;
  position: relative; z-index: 2;
  letter-spacing: 0.2px;
  animation: fadeUp 0.5s ease 0.15s both;
}

/* Single-column pricing and readable email on narrow phones */
@media (max-width: 480px) {
  .pricing-grid { grid-template-columns:1fr; }
  .email-addr { font-size:15px; word-break:break-all; }
}

/* Proportional font scaling for very narrow screens (Galaxy Fold, 280px) */
@media (max-width: 360px) {
  .hero-body h1 { font-size: clamp(1.3rem, 9vw, 1.9rem); letter-spacing:-0.5px; }
  .section-title { font-size: clamp(1.1rem, 7.5vw, 1.7rem); }
}