/* ControlByte Solution — site styles */
:root {
  --navy: #0d3b80;
  --navy-deep: #071f45;
  --navy-ink: #0a1830;
  --teal: #19b5b0;
  --teal-soft: #e3f6f5;
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #13213a;
  --muted: #5a6780;
  --line: #e1e6ef;
  --ok: #128a5c;
  --warn: #b7791f;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(10, 24, 48, .06), 0 8px 24px rgba(10, 24, 48, .06);
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--navy); }
h1, h2, h3, h4 { font-family: "Rajdhani", "Inter", sans-serif; line-height: 1.15; margin: 0 0 .5em; letter-spacing: .01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 700; }
h3, .h3 { font-size: 1.3rem; font-weight: 700; }
[hidden] { display: none !important; }
p { margin: 0 0 1em; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand img { height: 42px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: var(--text); text-decoration: none; font-weight: 500; font-size: .95rem;
}
.nav-links a:hover { background: var(--teal-soft); color: var(--navy); }
.nav-links a.active { color: var(--navy); background: var(--teal-soft); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; cursor: pointer; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--navy); margin: 4px 0; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; border: 0;
  font: 600 .95rem/1 "Inter", sans-serif; text-decoration: none; cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--teal); color: #fff; box-shadow: 0 6px 18px rgba(25, 181, 176, .35); }
.btn-primary:hover { background: #14a29d; }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--navy-deep); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, .35); }
.btn-ghost:hover { background: rgba(255, 255, 255, .08); }
.btn-outline { background: #fff; color: var(--navy); border: 1px solid var(--line); }
.btn-outline:hover { border-color: var(--teal); }
.btn-sm { padding: 9px 14px; font-size: .88rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }

/* hero */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1000px 500px at 85% 10%, rgba(25, 181, 176, .25), transparent 60%),
              linear-gradient(160deg, var(--navy-deep), var(--navy) 70%);
  color: #fff;
  padding: 96px 0 110px;
}
.hero .circuit { position: absolute; inset: 0; opacity: .18; pointer-events: none; }
.hero-grid > *, .split > *, .dl-main > *, .updater > *, .contact-grid > * { min-width: 0; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--teal); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--teal); }
.hero h1 span { color: var(--teal); }
.hero p.lead { font-size: 1.15rem; color: rgba(255, 255, 255, .8); max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-stats { display: flex; gap: 36px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats b { display: block; font-family: "Rajdhani", sans-serif; font-size: 2rem; color: #fff; line-height: 1; }
.hero-stats span { font-size: .85rem; color: rgba(255, 255, 255, .65); }

/* ladder card in hero */
.ladder-card {
  background: rgba(7, 20, 45, .75); border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius); padding: 18px; box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
  font-family: var(--mono); font-size: .82rem;
}
.ladder-card .bar { display: flex; gap: 6px; margin-bottom: 14px; align-items: center; }
.ladder-card .bar i { width: 10px; height: 10px; border-radius: 50%; background: #ffffff30; }
.ladder-card .bar small { margin-left: auto; color: #ffffff80; }
.ladder-card svg { width: 100%; height: auto; }
.ladder-card .il { margin-top: 12px; padding-top: 12px; border-top: 1px dashed #ffffff25; color: #9fe8e5; white-space: pre; overflow-x: auto; }

/* sections */
section { padding: 88px 0; }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow { color: var(--teal); }
.section-alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* service cards */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s;
}
.card:hover { transform: translateY(-3px); border-color: rgba(25, 181, 176, .55); }
.icon-box {
  width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center;
  background: var(--teal-soft); color: var(--navy); margin-bottom: 18px;
}
.icon-box svg { width: 26px; height: 26px; }
.card ul { padding-left: 18px; margin: 12px 0 0; color: var(--muted); font-size: .93rem; }
.card ul li { margin-bottom: 4px; }
.card p { color: var(--muted); font-size: .95rem; }

/* brands strip */
.brands { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 36px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--line);
  font-size: .86rem; font-weight: 500; color: var(--navy);
}
.chip.teal { background: var(--teal-soft); border-color: transparent; }

/* feature split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.check-list { list-style: none; padding: 0; margin: 20px 0 28px; }
.check-list li { position: relative; padding-left: 30px; margin-bottom: 12px; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--teal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center/11px no-repeat;
}
.editor-shot {
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff;
}
.editor-shot .top { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--navy-deep); color: #fff; font-size: .82rem; }
.editor-shot .top img { height: 18px; filter: brightness(10); }
.editor-shot .body { display: grid; grid-template-columns: 150px 1fr; min-height: 260px; }
.editor-shot .tree { background: #f2f5fa; border-right: 1px solid var(--line); padding: 12px; font-size: .8rem; color: var(--muted); }
.editor-shot .tree div { padding: 3px 0; }
.editor-shot .tree .on { color: var(--navy); font-weight: 600; }
.editor-shot .canvas { padding: 14px; }

/* process */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding: 24px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: "Rajdhani", sans-serif; font-weight: 700; font-size: 2rem; color: var(--teal); display: block; line-height: 1; margin-bottom: 10px;
}
.step p { color: var(--muted); font-size: .93rem; margin: 0; }

/* CTA band */
.cta-band {
  background: linear-gradient(120deg, var(--navy), var(--navy-deep)); color: #fff;
  border-radius: 20px; padding: 48px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
}
.cta-band p { color: rgba(255, 255, 255, .75); margin: 0; }

/* contact */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; }
.contact-info .row { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-info .row .icon-box { margin: 0; flex-shrink: 0; }
.contact-info b { display: block; }
form .field { margin-bottom: 16px; }
label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text); }
input, select, textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font: inherit; color: var(--text); background: #fff;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(25, 181, 176, .18); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* page header (inner pages) */
.page-hero {
  background: linear-gradient(160deg, var(--navy-deep), var(--navy)); color: #fff; padding: 64px 0 56px; position: relative; overflow: hidden;
}
.page-hero .circuit { position: absolute; inset: 0; opacity: .14; }
.page-hero .wrap { position: relative; }
.page-hero p { color: rgba(255, 255, 255, .78); max-width: 640px; font-size: 1.08rem; }

/* downloads */
.dl-main { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; margin-top: -40px; position: relative; }
.dl-hero-card { padding: 32px; }
.version-badge {
  display: inline-block; padding: 4px 10px; border-radius: 6px; background: var(--teal-soft); color: var(--navy);
  font: 600 .8rem var(--mono);
}
.os-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 22px 0 10px; }
.os-btn {
  display: flex; flex-direction: column; gap: 4px; padding: 16px; border-radius: 12px; border: 1px solid var(--line);
  text-decoration: none; color: var(--text); background: #fff; transition: border-color .15s, background .15s;
}
.os-btn:hover { border-color: var(--teal); background: var(--teal-soft); }
.os-btn.rec { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(25, 181, 176, .15); }
.os-btn b { font-size: .98rem; }
.os-btn small { color: var(--muted); font-size: .78rem; }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; background: #f8fafc; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.hash { font: .75rem var(--mono); color: var(--muted); word-break: break-all; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: .74rem; font-weight: 600; }
.tag.stable { background: #e2f5ec; color: var(--ok); }
.tag.beta { background: #fdf3e1; color: var(--warn); }
.tag.lts { background: #e4ecfa; color: var(--navy); }

/* update portal */
.updater { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: -40px; position: relative; }
.result { display: none; }
.result.show { display: block; }
.status {
  display: flex; gap: 14px; align-items: flex-start; padding: 16px; border-radius: 12px; margin-bottom: 18px;
}
.status.ok { background: #e2f5ec; color: #0c5c3e; }
.status.new { background: var(--teal-soft); color: var(--navy); }
.status.err { background: #fdeaea; color: #8a1c1c; }
.status b { display: block; }
.ver-compare { display: flex; align-items: center; gap: 14px; margin: 14px 0 20px; font-family: var(--mono); }
.ver-compare .v { padding: 10px 14px; border-radius: 10px; background: #f2f5fa; border: 1px solid var(--line); }
.ver-compare .v.latest { background: var(--teal-soft); border-color: var(--teal); }
.ver-compare small { display: block; font-family: "Inter", sans-serif; font-size: .72rem; color: var(--muted); }
.changelog { list-style: none; padding: 0; margin: 0 0 20px; }
.changelog li { padding: 8px 0 8px 22px; border-bottom: 1px dashed var(--line); position: relative; font-size: .92rem; }
.changelog li::before { content: "›"; position: absolute; left: 4px; color: var(--teal); font-weight: 700; }
.flash-steps { counter-reset: fs; list-style: none; padding: 0; margin: 0; }
.flash-steps li { counter-increment: fs; position: relative; padding: 0 0 18px 44px; }
.flash-steps li::before {
  content: counter(fs); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%;
  background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 600; font-size: .85rem;
}
.flash-steps li b { display: block; }
.flash-steps li span { color: var(--muted); font-size: .92rem; }
.progress { height: 8px; background: #eef2f7; border-radius: 99px; overflow: hidden; margin: 10px 0 6px; }
.progress div { height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--navy)); transition: width .25s; }
.console {
  background: var(--navy-ink); color: #a9f0ec; font: .8rem/1.6 var(--mono); padding: 14px; border-radius: 10px;
  height: 160px; overflow-y: auto; white-space: pre-wrap;
}
.note { font-size: .85rem; color: var(--muted); border-left: 3px solid var(--teal); padding: 6px 12px; background: #f8fafc; border-radius: 0 8px 8px 0; }

/* footer */
.site-footer { background: var(--navy-ink); color: rgba(255, 255, 255, .7); padding: 60px 0 28px; font-size: .92rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer .footer-title { color: #fff; font-size: 1.05rem; margin-bottom: 14px; }
.site-footer address { font-style: normal; }
.site-footer a { color: rgba(255, 255, 255, .7); text-decoration: none; display: block; margin-bottom: 8px; }
.site-footer a:hover { color: var(--teal); }
.footer-logo { background: #fff; display: inline-block; padding: 10px 14px; border-radius: 10px; margin-bottom: 14px; }
.footer-logo img { height: 34px; width: auto; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 40px; padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .84rem; }

.wa-float {
  position: fixed; right: 20px; bottom: 20px; width: 54px; height: 54px; border-radius: 50%;
  background: #25d366; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(0, 0, 0, .2); z-index: 60;
}
.wa-float svg { width: 28px; height: 28px; fill: #fff; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: none; }

/* responsive */
@media (max-width: 1000px) {
  .grid-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .hero-grid, .split, .contact-grid, .dl-main, .updater { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px; display: none;
  }
  .nav-links.open { display: flex; }
  .brand img { height: 34px; }
  section { padding: 64px 0; }
  .wrap { padding: 0 16px; }
  .grid-4, .grid-3, .grid-2, .steps, .form-row, .os-buttons { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 32px 24px; }
  .hero { padding: 64px 0 80px; }
  .editor-shot .body { grid-template-columns: 1fr; }
  .editor-shot .tree { display: none; }
}