*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

:root {
  --white: #ffffff;
  --off: #f7f8fa;
  --border: #e4e7ec;
  --border-dark: #c8cdd8;
  --text: #0d1117;
  --text-2: #3d4452;
  --text-3: #6b7385;
  --text-4: #9ba3b5;
  --brand: #1a6b3c;
  --brand-light: #edf7f1;
  --brand-mid: #c8e6d5;
  --brand-dark: #134f2d;
  --accent: #c47f17;
  --accent-light: #fdf6e7;
  --red: #c0392b;
  --red-light: #fdf0ef;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'Manrope', sans-serif;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --content-max: 1320px;
}

body {
  font-family: var(--sans);
  background: var(--white);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--content-max); margin: 0 auto; padding: 0 40px; }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--content-max); margin: 0 auto; padding: 0 40px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.logo {
  font-size: 1.2rem; font-weight: 800; color: var(--text);
  letter-spacing: -0.03em; text-decoration: none;
  display: flex; align-items: center; gap: 9px;
}
.logo-mark {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 800; color: white; letter-spacing: 0.02em;
}
.logo-word { white-space: nowrap; }
.logo-lex { color: var(--brand); font-style: normal; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 7px 13px; border-radius: 7px;
  font-size: 0.875rem; font-weight: 500; color: var(--text-2);
  text-decoration: none; transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: var(--off); color: var(--text); }
.nav-cta {
  background: var(--brand) !important; color: white !important;
  font-weight: 600 !important; border-radius: 8px !important;
}
.nav-cta:hover { background: var(--brand-dark) !important; }

/* Mobile burger */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}
.nav-burger:hover { background: var(--off); }
.nav-burger-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
body.nav-menu-open .nav-burger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
body.nav-menu-open .nav-burger-bar:nth-child(2) { opacity: 0; }
body.nav-menu-open .nav-burger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 64px 0 0;
  z-index: 150;
  background: rgba(13, 17, 23, 0.35);
  backdrop-filter: blur(2px);
}
body.nav-menu-open .nav-overlay {
  display: block;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 250;
  width: 46px;
  height: 46px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 1.25rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease, background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:not(.is-visible) {
  pointer-events: none;
}
.back-to-top:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

/* HERO */
#hero { padding: 130px 0 80px; border-bottom: 1px solid var(--border); }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }

.tag {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--brand-light); border: 1px solid var(--brand-mid);
  color: var(--brand-dark); padding: 5px 13px; border-radius: 100px;
  font-size: 0.71rem; font-weight: 700; letter-spacing: 0.07em;
  text-transform: uppercase; margin-bottom: 22px;
}
.tag-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); animation: blink 2s infinite; }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

h1 {
  font-size: clamp(2.2rem, 3.8vw, 3.2rem); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.1; color: var(--text); margin-bottom: 18px;
}
h1 strong { color: var(--brand); }

.hero-desc { font-size: 1.05rem; color: var(--text-2); line-height: 1.72; max-width: 480px; margin-bottom: 32px; }

.hero-ctas { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 11px 22px; border-radius: 8px;
  font-family: var(--sans); font-size: 0.9rem; font-weight: 600;
  text-decoration: none; cursor: pointer; border: none; transition: all 0.18s;
}
.btn-p { background: var(--brand); color: white; }
.btn-p:hover { background: var(--brand-dark); box-shadow: 0 4px 16px rgba(26,107,60,0.3); transform: translateY(-1px); }
.btn-s { background: var(--white); color: var(--text); border: 1.5px solid var(--border-dark); }
.btn-s:hover { background: var(--off); border-color: var(--text-4); }
.btn-g { background: transparent; color: var(--brand); padding: 11px 4px; font-size: 0.875rem; }
.btn-g:hover { text-decoration: underline; }

.hero-proof { display: flex; align-items: center; gap: 24px; padding-top: 28px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.pnum { font-size: 1.3rem; font-weight: 800; letter-spacing: -0.04em; color: var(--text); }
.plabel { font-size: 0.78rem; color: var(--text-4); line-height: 1.3; }
.pdiv { width: 1px; height: 30px; background: var(--border); }

/* Hero card */
.hero-card {
  background: var(--off); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow);
}
.hc-top {
  padding: 18px 22px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--white);
}
.hc-label { font-size: 0.75rem; font-weight: 700; color: var(--text-3); letter-spacing: 0.05em; text-transform: uppercase; }
.hc-badge { background: var(--brand-light); color: var(--brand-dark); font-size: 0.7rem; font-weight: 700; padding: 3px 10px; border-radius: 100px; letter-spacing: 0.04em; }

.check-row {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 22px; border-bottom: 1px solid var(--border); background: var(--white);
}
.check-row.invalid-row { background: var(--red-light); }
.check-row.valid-row { background: var(--brand-light); }
.cw-name { font-size: 0.95rem; font-weight: 700; color: var(--text); flex: 1; }
.cw-name.wavy { text-decoration: underline wavy var(--red); }
.cw-sub { font-size: 0.72rem; color: var(--text-4); margin-top: 1px; }
.cw-status {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.7rem; font-weight: 700; padding: 4px 10px;
  border-radius: 100px; white-space: nowrap; flex-shrink: 0;
}
.s-bad { background: rgba(192,57,43,0.12); color: var(--red); }
.s-good { background: var(--brand-mid); color: var(--brand-dark); }
.sdot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

.hc-code {
  background: #0d1117; padding: 18px 22px;
  font-family: var(--mono); font-size: 0.74rem; line-height: 1.9; color: #7d8590;
}
.hc-code .k { color: #7ee787; } .hc-code .v { color: #a5d6ff; } .hc-code .s { color: #79c0ff; }

/* CLIENTS */
#clients { background: var(--off); border-bottom: 1px solid var(--border); padding: 28px 0; }
.clients-row { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.clients-lbl { font-size: 0.72rem; font-weight: 700; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.08em; white-space: nowrap; }
.clients-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { font-size: 0.78rem; color: var(--text-3); font-weight: 500; padding: 5px 14px; border-radius: 100px; border: 1px solid var(--border); background: var(--white); }

/* SECTION SHARED */
section { padding: 88px 0; }
section.alt { background: var(--off); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.sec-label {
  display: flex; align-items: center; gap: 9px;
  font-size: 0.71rem; font-weight: 700; color: var(--brand);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 14px;
}
.sec-label::before { content:''; width:18px; height:2px; background:var(--brand); border-radius:2px; }

h2 {
  font-size: clamp(1.75rem, 2.8vw, 2.4rem); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.13; color: var(--text); margin-bottom: 14px;
}
.sec-desc { font-size: 1rem; color: var(--text-2); line-height: 1.72; max-width: 540px; }

/* PROBLEM */
.prob-header { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; margin-bottom: 48px; }
.prob-cards { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.prob-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}
.prob-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: var(--border-dark); }
.word-demo {
  display: flex; align-items: center; gap: 8px;
  background: var(--red-light); border: 1px solid rgba(192,57,43,0.15);
  border-radius: 8px; padding: 9px 13px; margin-bottom: 14px;
}
.wt { font-size: 0.9rem; font-weight: 700; color: var(--text); text-decoration: underline wavy var(--red); }
.wx { font-size: 0.85rem; color: var(--red); font-weight: 700; }
.prob-card h3 { font-size: 0.875rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.prob-card p { font-size: 0.8rem; color: var(--text-3); line-height: 1.6; }
.card-lang { margin-top: 14px; font-size: 0.68rem; color: var(--text-4); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }

.prob-stats { margin-top: 40px; display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--border); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); }
.stat-c { background: var(--white); padding: 32px 28px; }
.stat-n { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.04em; color: var(--brand); margin-bottom: 6px; }
.stat-l { font-size: 0.82rem; color: var(--text-3); line-height: 1.5; }

/* SOLUTION */
.sol-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; }
.sol-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-sm); transition: all 0.2s;
}
.sol-card:hover { box-shadow: var(--shadow); border-color: var(--brand-mid); transform: translateY(-2px); }
.sol-card.featured {
  grid-column: span 2; display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: center;
  background: var(--brand); border-color: var(--brand);
}
.sol-card.featured h3 { color: white; }
.sol-card.featured p { color: rgba(255,255,255,0.72); }
.sol-card.featured .sol-icon { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); color: white; }
.sol-icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--brand-light); border: 1px solid var(--brand-mid);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem; margin-bottom: 18px;
}
.sol-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.sol-card p { font-size: 0.83rem; color: var(--text-3); line-height: 1.65; }

.code-block {
  background: #0d1117; border-radius: var(--radius-lg); padding: 22px;
  font-family: var(--mono); font-size: 0.76rem; line-height: 2; color: #7d8590;
}
.cb-bar { display: flex; align-items: center; gap: 6px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.cd { width: 10px; height: 10px; border-radius: 50%; }
.cdr { background: #ff5f57; } .cdy { background: #febc2e; } .cdg { background: #28c840; }
.cp { font-family: var(--sans); font-size: 0.7rem; color: rgba(255,255,255,0.25); margin-left: 4px; }
.ck { color: #7ee787; } .cv { color: #a5d6ff; } .cs { color: #79c0ff; } .cn { color: #ffa657; }

/* USE CASES */
.uc-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 48px; }
.uc-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 26px; box-shadow: var(--shadow-sm); transition: all 0.2s;
}
.uc-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: var(--border-dark); }
.uc-icon { font-size: 1.5rem; margin-bottom: 12px; display: block; }
.uc-card h3 { font-size: 0.875rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.uc-card p { font-size: 0.8rem; color: var(--text-3); line-height: 1.6; }

/* API */
.api-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.api-feats { margin-top: 32px; display: flex; flex-direction: column; gap: 2px; }
.api-feat {
  display: flex; align-items: flex-start; gap: 13px;
  padding: 14px; border-radius: 9px; border: 1px solid transparent; transition: all 0.18s;
}
.api-feat:hover { background: var(--off); border-color: var(--border); }
.af-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.api-feat h4 { font-size: 0.875rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.api-feat p { font-size: 0.8rem; color: var(--text-3); line-height: 1.55; }

.code-window {
  background: #0d1117; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,0.06);
}
.code-tabs-bar { background: #161b22; border-bottom: 1px solid rgba(255,255,255,0.07); display: flex; padding: 0 16px; }
.ctab {
  padding: 11px 15px; font-size: 0.75rem; font-family: var(--sans);
  color: rgba(255,255,255,0.3); border-bottom: 2px solid transparent; cursor: pointer; transition: all 0.18s;
}
.ctab.active { color: #58a6ff; border-bottom-color: #58a6ff; }
.code-inner { padding: 24px; font-family: var(--mono); font-size: 0.77rem; line-height: 2; color: #7d8590; }
.cl { display: block; }
.cli { padding-left: 18px; }

/* VISION */
#vision { background: var(--brand); border: none; }
#vision .sec-label { color: rgba(255,255,255,0.55); }
#vision .sec-label::before { background: rgba(255,255,255,0.35); }
#vision h2 { color: white; max-width: 680px; }
#vision .sec-desc { color: rgba(255,255,255,0.72); max-width: 580px; margin-top: 4px; }
.lang-grid { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 9px; }
.lpill {
  padding: 7px 16px; border-radius: 100px;
  border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.08);
  font-size: 0.8rem; color: rgba(255,255,255,0.78); font-weight: 500; transition: all 0.18s;
}
.lpill:hover { background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.4); color: white; }

/* INTEGRATIONS */
#integrations { background: var(--off); }
.intg-head { max-width: 700px; margin-bottom: 56px; }
.intg-head h2 { margin-bottom: 12px; }
.intg-group { margin-bottom: 48px; }
.intg-group-label {
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--text-4); margin-bottom: 20px;
}
.intg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 16px;
}
.intg-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; padding: 24px 16px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s, transform 0.18s;
  text-align: center; position: relative;
}
.intg-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.intg-card-logo {
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
}
.intg-card-logo img { max-width: 72px; max-height: 72px; width: auto; height: auto; object-fit: contain; }
.intg-card-logo--empty {
  background: var(--brand-light); border-radius: 14px;
  font-size: 1.2rem; font-weight: 800; color: var(--brand);
}
.intg-card-label {
  font-size: 0.82rem; font-weight: 600; color: var(--text-2); line-height: 1.3;
}
.intg-card-badge {
  font-size: 0.68rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--accent); background: var(--accent-light);
  border: 1px solid rgba(196,127,23,0.25); border-radius: 20px;
  padding: 2px 8px; white-space: nowrap;
}
.intg-footnote {
  text-align: center; font-size: 0.82rem; color: var(--text-4);
  margin-top: 8px;
}

/* FOOTER */
footer { background: var(--off); border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.footer-copy { font-size: 0.78rem; color: var(--text-4); }
.footer-nav { display: flex; gap: 20px; }
.footer-nav a { font-size: 0.78rem; color: var(--text-3); text-decoration: none; transition: color 0.15s; }
.footer-nav a:hover { color: var(--text); }

/* ANIMATIONS */
.anim { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.anim.in { opacity: 1; transform: none; }

/* RESPONSIVE */
@media (max-width: 980px) {
  .wrap, .nav-inner { padding: 0 24px; }
  .hero-inner, .prob-header, .sol-grid, .api-layout { grid-template-columns: 1fr; }
  .intg-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 12px; }
  .hero-inner { gap: 48px; }
  .sol-card.featured { grid-column: span 1; grid-template-columns: 1fr; }
  .prob-cards, .uc-grid { grid-template-columns: 1fr 1fr; }
  .prob-stats { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .form-group.full { grid-column: span 1; }

  .nav-burger { display: flex; }
  .nav-inner { position: relative; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 200;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 20px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.35s ease, opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
  }
  body.nav-menu-open .nav-links {
    max-height: min(70vh, 420px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 12px 14px;
    border-radius: 8px;
    text-align: left;
  }
  .nav-links .nav-cta { text-align: center; margin-top: 6px; }

  body.nav-menu-open { overflow: hidden; }
}
@media (max-width: 580px) {
  .prob-cards, .uc-grid { grid-template-columns: 1fr; }
  .hero-proof { gap: 16px; }
  h1 { font-size: 2rem; }
  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
}