:root {
  --bg: #0a171e;
  --bg-2: #0e1f28;
  --card: #122832;
  --line: #1e3844;
  --text: #e9f5f1;
  --muted: #8fa9b3;
  --accent: #80f5d2;
  --accent-2: #4fd6b0;
  --ink: #0a171e;
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 750; margin-bottom: 14px; }
h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
p { color: var(--muted); }
strong { color: var(--text); }

.container { width: min(1160px, 100% - 40px); margin: 0 auto; }
.section { padding: 84px 0; }
.section.alt { background: var(--bg-2); border-block: 1px solid var(--line); }
.lead { font-size: 1.15rem; max-width: 680px; }
.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.head { margin-bottom: 44px; }
.head.center { text-align: center; }
.head.center .lead { margin-inline: auto; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 23, 30, .88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand img { height: 28px; width: auto; display: block; }
.menu { display: flex; align-items: center; gap: 6px; }
.menu a {
  padding: 8px 14px; border-radius: 999px;
  font-size: .95rem; font-weight: 600; color: var(--muted);
  transition: .2s;
}
.menu a:hover { color: var(--text); background: var(--card); }
.menu a[aria-current="page"] { color: var(--ink); background: var(--accent); }
.burger {
  display: none; background: none; border: 1px solid var(--line);
  width: 42px; height: 42px; border-radius: 12px; cursor: pointer; position: relative;
}
.burger span, .burger span::before, .burger span::after {
  content: ""; position: absolute; left: 11px; width: 18px; height: 2px;
  background: var(--text); border-radius: 2px; transition: .25s;
}
.burger span { top: 19px; }
.burger span::before { top: -6px; left: 0; }
.burger span::after { top: 6px; left: 0; }
.burger.open span { background: transparent; }
.burger.open span::before { top: 0; transform: rotate(45deg); }
.burger.open span::after { top: 0; transform: rotate(-45deg); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 700; font-size: 1rem; border: 1px solid transparent;
  cursor: pointer; transition: .2s; font-family: inherit;
}
.btn-primary { background: var(--accent); color: var(--ink); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* hero */
.hero { padding: 90px 0 80px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; width: 640px; height: 640px; right: -180px; top: -260px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), .18), transparent 65%);
  pointer-events: none;
}
.hero p.lead { margin-top: 20px; }
.hero h1 em { font-style: normal; color: var(--accent); }

/* cards */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  transition: .25s;
}
.card:hover { border-color: rgba(var(--accent-rgb), .5); transform: translateY(-3px); }
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.tag {
  display: inline-block; font-size: .75rem; font-weight: 700;
  padding: 4px 10px; border-radius: 999px;
  background: rgba(var(--accent-rgb), .12); color: var(--accent); margin-bottom: 14px;
}

/* table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line); font-size: .97rem; }
th { background: var(--card); color: var(--accent); font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; }
td { color: var(--muted); }
td:first-child { color: var(--text); font-weight: 650; }
tr:last-child td { border-bottom: 0; }

/* faq */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 0 22px; }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 0; font-weight: 650;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; color: var(--accent); transition: .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: 20px; }

/* cta */
.cta {
  background: linear-gradient(135deg, var(--accent), #5fe3bd);
  color: var(--ink); border-radius: 28px; padding: 56px 40px; text-align: center;
}
.cta h2 { color: var(--ink); }
.cta p { color: #17433a; max-width: 560px; margin: 0 auto; }
.cta .btn-primary { background: var(--ink); color: var(--accent); margin-top: 26px; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 56px 0 30px; margin-top: 40px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 36px; }
.foot-grid img { height: 26px; margin-bottom: 14px; }
.foot-grid h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .1em; color: var(--accent); margin-bottom: 14px; }
.foot-grid li { margin-bottom: 8px; }
.foot-grid li a { color: var(--muted); font-size: .95rem; }
.foot-grid li a:hover { color: var(--text); }
.copy { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: .88rem; color: var(--muted); }

/* ===== HOME ===== */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.chip { border: 1px solid var(--line); background: var(--card); padding: 8px 16px; border-radius: 999px; font-size: .9rem; color: var(--muted); }
.chip b { color: var(--accent); }
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.bento .card:nth-child(1) { grid-column: span 4; }
.bento .card:nth-child(2) { grid-column: span 2; }
.bento .card:nth-child(3) { grid-column: span 2; }
.bento .card:nth-child(4) { grid-column: span 4; }
.timeline { position: relative; max-width: 780px; margin: 0 auto; padding-left: 70px; }
.timeline::before { content: ""; position: absolute; left: 22px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline li { position: relative; margin-bottom: 34px; }
.timeline li:last-child { margin-bottom: 0; }
.timeline .n {
  position: absolute; left: -70px; top: 0; width: 46px; height: 46px; border-radius: 50%;
  background: var(--accent); color: var(--ink); font-weight: 800; display: grid; place-items: center;
}
.persona { text-align: left; }
.persona .big { font-size: 2.4rem; font-weight: 800; color: var(--accent); line-height: 1; margin-bottom: 14px; }

/* ===== CHATBOT ===== */
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.console { background: #06100f; border: 1px solid var(--line); border-radius: var(--radius); font-family: var(--mono); font-size: .9rem; overflow: hidden; }
.console-bar { display: flex; gap: 7px; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.console-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--line); }
.console-bar i:first-child { background: var(--accent); }
.console-body { padding: 18px; display: grid; gap: 10px; }
.console-body p { color: var(--muted); }
.console-body .u { color: var(--accent); font-weight: 700; }
.console-body .bot { color: #ffd479; font-weight: 700; }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tab-btn { background: var(--card); border: 1px solid var(--line); color: var(--muted); padding: 10px 20px; border-radius: 999px; font-weight: 650; cursor: pointer; font-family: inherit; font-size: .95rem; }
.tab-btn.active { background: var(--accent); color: var(--ink); border-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.cmd-list { display: grid; gap: 12px; }
.cmd { display: grid; grid-template-columns: 200px 1fr; gap: 20px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; align-items: center; }
.cmd code { font-family: var(--mono); color: var(--accent); font-size: .95rem; }
.checklist { max-width: 760px; display: grid; gap: 12px; }
.checklist li { display: flex; gap: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; }
.checklist li::before { content: "✓"; flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: var(--ink); font-weight: 800; display: grid; place-items: center; }
.mods { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.mods li { background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--accent); border-radius: 12px; padding: 20px 16px; }
.mods li b { display: block; margin-bottom: 6px; }
.mods li span { font-size: .9rem; color: var(--muted); }

/* ===== ALERT BOX ===== */
.hero-center { text-align: center; }
.hero-center .lead { margin-inline: auto; }
.hero-center .btn-row { justify-content: center; }
.pills { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 36px; }
.pill { padding: 9px 18px; border-radius: 999px; font-weight: 650; font-size: .92rem; border: 1px solid var(--line); background: var(--card); }
.pill:nth-child(odd) { border-color: rgba(var(--accent-rgb), .45); color: var(--accent); }
.alert-demo { max-width: 520px; margin: 44px auto 0; background: var(--card); border: 1px solid var(--accent); border-radius: 20px; padding: 26px 30px; box-shadow: 0 0 60px rgba(var(--accent-rgb), .18); text-align: center; }
.alert-demo b { display: block; font-size: 1.5rem; color: var(--accent); }
.alert-demo span { color: var(--muted); }
.event-card .ico { width: 48px; height: 48px; border-radius: 14px; background: rgba(var(--accent-rgb), .12); color: var(--accent); display: grid; place-items: center; font-weight: 800; margin-bottom: 16px; font-size: 1.1rem; }
.anatomy { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.anatomy > div { padding: 32px 28px; border-right: 1px solid var(--line); background: var(--card); }
.anatomy > div:last-child { border-right: 0; }
.anatomy > div:nth-child(2) { background: var(--bg-2); }
.anatomy h3 span { color: var(--accent); margin-right: 8px; }
.steps-h { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: s; }
.steps-h li { padding: 28px 24px; border-top: 3px solid var(--line); counter-increment: s; position: relative; }
.steps-h li::before { content: "0" counter(s); font-size: 2.2rem; font-weight: 800; color: var(--accent); display: block; margin-bottom: 8px; }
.steps-h li:hover { border-top-color: var(--accent); }
.dodont { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.dodont h3 { display: flex; align-items: center; gap: 10px; }
.dodont .yes h3 { color: var(--accent); }
.dodont .no h3 { color: #ff8e8e; }
.dodont li { padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.dodont li:last-child { border-bottom: 0; }

/* ===== CHAT BOX ===== */
.chat-mock { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: grid; gap: 12px; }
.msg { display: flex; gap: 12px; align-items: flex-start; }
.msg .av { flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: var(--ink); font-weight: 800; display: grid; place-items: center; font-size: .85rem; }
.msg:nth-child(2) .av { background: #ffd479; }
.msg:nth-child(3) .av { background: #9ab6ff; }
.msg:nth-child(4) .av { background: #ff9ac8; }
.msg .bubble { background: var(--bg-2); border-radius: 4px 14px 14px 14px; padding: 9px 14px; font-size: .92rem; color: var(--text); }
.msg .bubble b { color: var(--accent); margin-right: 6px; }
.layouts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.layouts > div { padding: 34px 28px; border: 1px solid var(--line); margin-left: -1px; background: var(--card); }
.layouts > div:first-child { border-radius: var(--radius) 0 0 var(--radius); margin-left: 0; }
.layouts > div:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.layouts .num { font-size: 3rem; font-weight: 800; color: var(--line); line-height: 1; }
.layouts > div:hover .num { color: var(--accent); }
.code-box { background: #06100f; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.code-top { display: flex; justify-content: space-between; align-items: center; padding: 12px 18px; background: var(--card); border-bottom: 1px solid var(--line); font-size: .85rem; color: var(--muted); }
.copy-btn { background: var(--accent); color: var(--ink); border: 0; padding: 6px 14px; border-radius: 999px; font-weight: 700; cursor: pointer; font-family: inherit; font-size: .82rem; }
pre { padding: 22px; overflow-x: auto; font-family: var(--mono); font-size: .88rem; color: #bfe9dc; line-height: 1.7; }
.side-by-side { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.side-by-side .sticky { position: sticky; top: 100px; }
.stack { display: grid; gap: 12px; }
.stack details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 0 22px; }
.stack summary { list-style: none; cursor: pointer; padding: 18px 0; font-weight: 650; display: flex; justify-content: space-between; }
.stack summary::-webkit-details-marker { display: none; }
.stack summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; }
.stack details[open] summary::after { content: "–"; }
.stack details p { padding-bottom: 18px; }
.obs-row { display: grid; gap: 14px; counter-reset: o; }
.obs-row li { display: grid; grid-template-columns: 56px 1fr; gap: 18px; align-items: start; padding: 20px 24px; background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; counter-increment: o; }
.obs-row li::before { content: counter(o); width: 44px; height: 44px; border-radius: 12px; background: var(--accent); color: var(--ink); font-weight: 800; display: grid; place-items: center; font-size: 1.15rem; }

/* responsive */
@media (max-width: 960px) {
  .g3, .g4, .mods, .steps-h { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: 1fr; }
  .bento .card:nth-child(n) { grid-column: auto; }
  .split, .side-by-side { grid-template-columns: 1fr; gap: 36px; }
  .side-by-side .sticky { position: static; }
  .anatomy, .layouts { grid-template-columns: 1fr; }
  .anatomy > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .layouts > div, .layouts > div:first-child, .layouts > div:last-child { border-radius: 0; margin: 0 0 -1px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 60px 0; }
  .burger { display: block; }
  .menu {
    position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px 20px 20px; display: none;
  }
  .menu.open { display: flex; }
  .menu a { padding: 14px; }
  .g2, .g3, .g4, .mods, .steps-h, .dodont { grid-template-columns: 1fr; }
  .cmd { grid-template-columns: 1fr; gap: 6px; }
  .cta { padding: 40px 22px; }
  .foot-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 58px; }
  .timeline .n { left: -58px; }
}

/* ===== PAGE THEMES ===== */
:root { --accent-rgb: 128, 245, 210; }
.theme-sky { --accent: #8fd3ff; --accent-2: #62b9f0; --accent-rgb: 143, 211, 255; }
.theme-amber { --accent: #ffd479; --accent-2: #f2b84a; --accent-rgb: 255, 212, 121; }
.btn-primary:hover { background: var(--accent); filter: brightness(1.12); }

/* section heads */
.head.bar { border-left: 4px solid var(--accent); padding-left: 22px; }

/* FAQ variants */
.faq-split { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.faq-split .sticky { position: sticky; top: 100px; margin-bottom: 0; }
.faq-split .faq { max-width: none; margin: 0; }
.faq-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.faq-cards .card h3 { color: var(--accent); }
.faq-num { display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; counter-reset: q; }
.faq-num li { counter-increment: q; padding: 26px 0; border-top: 1px solid var(--line); }
.faq-num li::before { content: "Q" counter(q); display: block; color: var(--accent); font-weight: 800; font-size: .82rem; letter-spacing: .12em; margin-bottom: 8px; }
.faq.faq-two { max-width: none; grid-template-columns: 1fr 1fr; align-items: start; }

/* CTA variants */
.cta-strip { display: flex; justify-content: space-between; align-items: center; gap: 30px; background: var(--card); border: 1px solid rgba(var(--accent-rgb), .5); border-radius: 22px; padding: 34px 40px; }
.cta-strip h2 { margin-bottom: 6px; font-size: 1.7rem; }
.cta-strip .btn { flex: none; }
.cta-split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; background: var(--card); border-left: 6px solid var(--accent); border-radius: 24px; padding: 52px 48px; }
.cta-split h2 { margin: 0; font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.cta-split .btn { margin-top: 22px; }
.cta-bleed { background: var(--accent); color: var(--ink); padding: 70px 0; text-align: center; margin-top: 30px; }
.cta-bleed h2 { color: var(--ink); font-size: clamp(2rem, 4.5vw, 3.2rem); }
.cta-bleed p { color: rgba(10, 23, 30, .75); max-width: 560px; margin: 0 auto; }
.cta-bleed .btn { background: var(--ink); color: var(--accent); margin-top: 26px; }
.cta { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.cta p { color: rgba(10, 23, 30, .75); }

/* footer variants */
.foot-center { text-align: center; }
.foot-center img, .foot-line img { height: 26px; margin-bottom: 12px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 22px; }
.foot-center .foot-links { justify-content: center; }
.foot-links a { color: var(--muted); font-size: .95rem; }
.foot-links a:hover { color: var(--accent); }
.foot-line { display: flex; justify-content: space-between; gap: 40px; align-items: flex-start; }
.foot-line .foot-links { margin-top: 0; max-width: 520px; justify-content: flex-end; }

/* home: persona rows */
.persona-list { border-bottom: 1px solid var(--line); }
.persona-row { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 30px 0; border-top: 1px solid var(--line); align-items: start; }
.persona-row .big { font-size: 3.2rem; font-weight: 800; color: var(--accent); line-height: 1; }
.persona-row p { max-width: 640px; }

/* chatbot: permission cards */
.perm h3 { color: var(--accent); font-size: 1.05rem; }

/* alert box: stat tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
.tile { border: 1px solid var(--line); border-radius: 16px; padding: 24px; background: var(--card); }
.tile span { font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.tile b { display: block; font-size: 1.9rem; color: var(--accent); margin: 8px 0 10px; line-height: 1.1; }
.tile p { font-size: .9rem; }

@media (max-width: 960px) {
  .faq-split, .cta-split, .faq-num, .faq.faq-two { grid-template-columns: 1fr; }
  .faq-split .sticky { position: static; margin-bottom: 30px; }
  .cta-strip { flex-direction: column; align-items: flex-start; }
  .foot-line { flex-direction: column; }
  .foot-line .foot-links { justify-content: flex-start; }
}
@media (max-width: 720px) {
  .faq-cards { grid-template-columns: 1fr; }
  .persona-row { grid-template-columns: 70px 1fr; }
  .cta-split { padding: 34px 24px; }
  .cta-strip { padding: 28px 24px; }
}