/* =========================================================
   CII — CONVERSATIONAL INTELLIGENCE INFRASTRUCTURE
   DESIGN TOKENS
   Ink/Paper base · Signal (indigo, intelligence) · Pulse (teal, signature)
   Display: Sora · Body: Inter · Data/Code: JetBrains Mono
   ========================================================= */
:root{
  --ink:        #0B1220;
  --ink-2:      #131C30;
  --paper:      #FFFFFF;
  --bg:         #F6F7FA;
  --surface:    #FFFFFF;
  --border:     #E4E7EE;
  --border-2:   #DBDFE8;

  --text:       #10182B;
  --text-soft:  #56607A;
  --text-faint: #8891A6;

  --signal:      #3651D4;   /* Signal blue — intelligence, primary action */
  --signal-2:    #2C42B0;
  --signal-soft: #EAEDFB;

  --pulse:       #0EA5A0;   /* Pulse teal — the brand signature */
  --pulse-2:     #0B8783;
  --pulse-soft:  #E3F7F5;

  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(11,18,32,.05), 0 1px 1px rgba(11,18,32,.04);
  --shadow-md: 0 10px 28px rgba(11,18,32,.08);
  --shadow-lg: 0 24px 60px rgba(11,18,32,.14);

  --max: 1240px;
}

html[data-theme="dark"]{
  --bg: #070B14; --surface:#0F1626; --border:#1D2740; --border-2:#26314D;
  --text:#EAEEF7; --text-soft:#A6B0C6; --text-faint:#6C7690;
  --signal-soft:#141C39; --pulse-soft:#0B211F;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);
  -webkit-font-smoothing:antialiased;transition:background .3s,color .3s;
}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
.container{max-width:var(--max);margin:0 auto;padding:0 24px;}
h1,h2,h3{font-family:var(--font-display);font-weight:600;color:var(--text);margin:0;letter-spacing:-.01em;}
p{line-height:1.65;}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;}
::selection{background:var(--pulse);color:#fff;}
:focus-visible{outline:2.5px solid var(--signal);outline-offset:2px;border-radius:4px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* =================== TYPE UTILITIES =================== */
.eyebrow{
  font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.1em;font-size:.72rem;
  color:var(--pulse-2);font-weight:600;margin:0 0 14px;display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:14px;height:1.5px;background:var(--pulse);display:inline-block;}
.eyebrow--onDark{color:#5FE0D6;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:34px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);}
.section-head p{color:var(--text-soft);max-width:560px;margin-top:10px;}

/* =================== BUTTONS =================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-weight:600;
  font-size:.94rem;padding:12px 22px;border-radius:10px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .15s, box-shadow .15s, background .15s, border-color .15s, color .15s;white-space:nowrap;}
.btn:hover{transform:translateY(-1px);}
.btn--primary{background:var(--signal);color:#fff;box-shadow:var(--shadow-sm);}
.btn--primary:hover{background:var(--signal-2);box-shadow:var(--shadow-md);}
.btn--pulse{background:var(--pulse);color:#fff;}
.btn--pulse:hover{background:var(--pulse-2);box-shadow:var(--shadow-md);}
.btn--outline{background:transparent;border-color:var(--border-2);color:var(--text);}
.btn--outline:hover{border-color:var(--signal);color:var(--signal);}
.btn--outline.btn--onDark{border-color:rgba(255,255,255,.28);color:#fff;}
.btn--outline.btn--onDark:hover{border-color:#fff;}
.btn--ghost{background:transparent;color:var(--text-soft);padding:10px 6px;}
.btn--ghost:hover{color:var(--signal);}
.btn--lg{padding:15px 26px;font-size:1rem;border-radius:12px;}
.btn--block{width:100%;}

/* =================== HEADER / NAV =================== */
.site-header{position:sticky;top:0;z-index:80;background:color-mix(in srgb, var(--surface) 90%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);}
.header__inner{display:flex;align-items:center;gap:8px;height:74px;}
.brand{display:flex;align-items:center;gap:10px;margin-right:20px;}
.brand__mark{width:34px;height:34px;border-radius:9px;background:var(--ink);position:relative;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.brand__mark svg{width:19px;height:19px;stroke:var(--pulse);}
.brand__name{font-family:var(--font-display);font-weight:600;font-size:1.02rem;letter-spacing:-.01em;}
.brand__name b{color:var(--signal);}

.main-nav{display:flex;align-items:center;gap:4px;margin-right:auto;position:relative;}
.nav-item{position:relative;}
.nav-item > button, .nav-item > a{
  display:flex;align-items:center;gap:5px;background:none;border:none;font-family:var(--font-body);font-weight:500;
  font-size:.9rem;color:var(--text-soft);padding:10px 12px;border-radius:8px;cursor:pointer;
}
.nav-item > button:hover, .nav-item > a:hover, .nav-item.open > button{color:var(--text);background:var(--bg);}
.nav-item svg{width:14px;height:14px;transition:transform .15s;}
.nav-item.open svg{transform:rotate(180deg);}
.mega{
  display:none;position:absolute;top:calc(100% + 8px);left:0;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:18px;min-width:280px;grid-template-columns:1fr;gap:2px;
}
.nav-item.open .mega{display:grid;}
.mega a{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:8px;font-size:.88rem;color:var(--text);}
.mega a:hover{background:var(--signal-soft);}
.mega a span{font-size:.76rem;color:var(--text-faint);font-weight:400;}
.mega--wide{grid-template-columns:repeat(2,1fr);min-width:460px;}

.header__actions{display:flex;align-items:center;gap:10px;}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.hamburger span{width:22px;height:2px;background:var(--text);border-radius:2px;}

/* =================== HERO =================== */
.hero{position:relative;padding:88px 0 40px;overflow:hidden;}
.hero__bg{position:absolute;inset:0;z-index:-1;
  background:radial-gradient(55% 45% at 85% -10%, rgba(14,165,160,.14), transparent 60%),
             radial-gradient(45% 40% at 5% 100%, rgba(54,81,212,.10), transparent 60%);
}
.hero__inner{max-width:820px;}
.hero__headline{font-size:clamp(2.1rem,4.6vw,3.4rem);line-height:1.1;margin-bottom:20px;}
.hero__headline .hl{color:var(--signal);}
.hero__sub{font-size:1.08rem;color:var(--text-soft);max-width:620px;margin-bottom:32px;}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:56px;}

/* Pulse line signature */
.pulse-line{width:100%;height:64px;margin:0 0 8px;}
.pulse-line path{fill:none;stroke:var(--pulse);stroke-width:2;stroke-linecap:round;}
.pulse-line .glow{stroke:var(--pulse);opacity:.18;stroke-width:8;filter:blur(2px);}
.pulse-line-dot{r:4;fill:var(--pulse);}

.hero__trust{display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:var(--text-faint);font-size:.8rem;font-family:var(--font-mono);}
.hero__trust span{padding:5px 10px;border:1px solid var(--border);border-radius:999px;}

/* =================== VALUE PROPS =================== */
.value-props{padding:24px 0 70px;}
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.value-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px 22px;}
.value-card__icon{width:42px;height:42px;border-radius:11px;background:var(--pulse-soft);color:var(--pulse-2);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.value-card h3{font-size:1.02rem;margin-bottom:8px;}
.value-card p{color:var(--text-soft);font-size:.9rem;margin:0;}

/* =================== LIFECYCLE LOOP =================== */
.lifecycle{background:var(--ink);color:#fff;padding:80px 0;}
.lifecycle h2, .lifecycle .section-head p{color:#fff;}
.lifecycle .section-head p{color:#AEB8D4;}
.lifecycle-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.loop-svg{width:100%;height:auto;}
.loop-node{fill:#141C33;stroke:#28345A;stroke-width:1;cursor:pointer;transition:.15s;}
.loop-node.active{fill:var(--pulse);stroke:var(--pulse);}
.loop-label{font-family:var(--font-body);font-size:9.5px;fill:#C6CEE5;pointer-events:none;}
.loop-label.active{fill:#08161A;font-weight:600;}
.loop-detail{background:#101A30;border:1px solid #232F52;border-radius:var(--radius-lg);padding:26px;min-height:220px;}
.loop-detail .step-num{font-family:var(--font-mono);color:#5FE0D6;font-size:.78rem;}
.loop-detail h4{color:#fff;font-family:var(--font-display);font-size:1.25rem;margin:8px 0 10px;}
.loop-detail p{color:#AEB8D4;font-size:.92rem;margin:0;}

/* =================== PULSE ECOSYSTEM =================== */
.ecosystem{padding:76px 0;}
.pulse-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.pulse-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:.18s;position:relative;overflow:hidden;}
.pulse-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:transparent;}
.pulse-card__icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.15rem;margin-bottom:14px;}
.pulse-card__name{font-family:var(--font-display);font-weight:600;font-size:1.08rem;margin-bottom:6px;}
.pulse-card__domain{font-size:.82rem;color:var(--text-faint);text-transform:uppercase;letter-spacing:.05em;font-family:var(--font-mono);margin-bottom:10px;}
.pulse-card p{font-size:.88rem;color:var(--text-soft);margin:0 0 14px;}
.pulse-card a{font-size:.85rem;font-weight:600;color:var(--signal);}
.ecosystem__note{text-align:center;margin-top:30px;color:var(--text-soft);font-size:.92rem;}
.ecosystem__note strong{color:var(--text);}

/* =================== ARCHITECTURE =================== */
.architecture{padding:76px 0;background:var(--bg);}
.arch-wrap{display:grid;grid-template-columns:1fr 1fr;gap:30px;}
.arch-stack{display:flex;flex-direction:column;gap:10px;}
.arch-layer{
  background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-md);padding:16px 20px;
  cursor:pointer;transition:.15s;
}
.arch-layer:hover, .arch-layer.active{border-color:var(--signal);box-shadow:var(--shadow-sm);}
.arch-layer__top{display:flex;justify-content:space-between;align-items:center;}
.arch-layer__name{font-weight:600;font-size:.95rem;}
.arch-layer__tag{font-family:var(--font-mono);font-size:.72rem;color:var(--pulse-2);background:var(--pulse-soft);padding:3px 9px;border-radius:999px;}
.arch-detail{background:var(--ink);color:#fff;border-radius:var(--radius-lg);padding:28px;min-height:280px;}
.arch-detail h4{color:#fff;font-family:var(--font-display);font-size:1.3rem;margin-bottom:12px;}
.arch-detail p{color:#AEB8D4;font-size:.92rem;margin-bottom:16px;}
.arch-detail__tech{display:flex;flex-wrap:wrap;gap:8px;}
.arch-detail__tech span{font-family:var(--font-mono);font-size:.75rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);padding:5px 10px;border-radius:8px;color:#DDEAFF;}

/* =================== INDUSTRY SOLUTIONS =================== */
.solutions{padding:76px 0;}
.solutions-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.solution-chip{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:18px 14px;text-align:center;font-size:.86rem;font-weight:600;}
.solution-chip span{display:block;font-family:var(--font-mono);font-size:.7rem;color:var(--pulse-2);font-weight:600;margin-top:6px;text-transform:uppercase;letter-spacing:.04em;}

/* =================== METRICS =================== */
.metrics{background:var(--signal);color:#fff;padding:56px 0;}
.metrics-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;}
.metric{text-align:center;}
.metric__value{font-family:var(--font-mono);font-weight:600;font-size:1.9rem;display:block;}
.metric__label{font-size:.78rem;color:#D3DBFA;margin-top:6px;text-transform:uppercase;letter-spacing:.05em;}

/* =================== TESTIMONIALS =================== */
.testimonials{padding:76px 0;background:var(--bg);}
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.testimonial{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;display:flex;flex-direction:column;gap:16px;}
.testimonial__quote{font-family:var(--font-display);font-size:1.02rem;font-weight:500;line-height:1.5;}
.testimonial__who{display:flex;align-items:center;gap:10px;margin-top:auto;}
.testimonial__avatar{width:38px;height:38px;border-radius:50%;background:var(--signal-soft);color:var(--signal-2);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:.85rem;}
.testimonial__name{font-size:.86rem;font-weight:600;}
.testimonial__role{font-size:.78rem;color:var(--text-faint);}
.testimonials__disclaimer{text-align:center;color:var(--text-faint);font-size:.78rem;margin-top:24px;}

/* =================== RESOURCES =================== */
.resources{padding:76px 0;}
.resources-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.resource-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;}
.resource-card__icon{width:38px;height:38px;border-radius:10px;background:var(--signal-soft);color:var(--signal);display:flex;align-items:center;justify-content:center;margin-bottom:14px;}
.resource-card h3{font-size:.98rem;margin-bottom:8px;}
.resource-card p{font-size:.86rem;color:var(--text-soft);margin:0 0 14px;}
.resource-card a{font-size:.84rem;font-weight:600;color:var(--signal);}

/* =================== FINAL CTA =================== */
.final-cta{background:linear-gradient(135deg,var(--ink),#152047);padding:80px 0;color:#fff;text-align:center;}
.final-cta__inner{max-width:720px;margin:0 auto;}
.final-cta h2{color:#fff;font-size:clamp(1.6rem,3.4vw,2.3rem);margin-bottom:16px;}
.final-cta p{color:#AEB8D4;margin-bottom:30px;font-size:1.05rem;}
.final-cta__actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* =================== FOOTER =================== */
.site-footer{background:var(--ink);color:#AEB8D4;padding:56px 0 0;}
.footer__grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:30px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08);}
.footer__brand p{font-size:.85rem;line-height:1.5;margin-top:14px;color:#7C88AC;max-width:240px;}
.footer__brand .brand__name{color:#fff;}
.footer__grid h4{color:#fff;font-family:var(--font-body);font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;}
.footer__grid a{display:block;font-size:.86rem;margin-bottom:10px;color:#AEB8D4;}
.footer__grid a:hover{color:#fff;}
.footer__bottom{padding:20px 0;font-size:.76rem;color:#5B6785;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

/* =================== GENERIC PAGE HERO (subpages) =================== */
.page-hero{padding:64px 0 50px;background:linear-gradient(180deg, var(--signal-soft), var(--bg) 75%);}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);margin-bottom:16px;max-width:760px;}
.page-hero p{color:var(--text-soft);max-width:640px;font-size:1.05rem;}
.breadcrumb{font-family:var(--font-mono);font-size:.76rem;color:var(--text-faint);margin-bottom:16px;}
.breadcrumb a{color:var(--signal);}

/* =================== GENERIC CONTENT BLOCKS =================== */
.content-section{padding:56px 0;}
.content-section--alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.check-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;}
.check-list li{display:flex;gap:10px;font-size:.94rem;color:var(--text-soft);}
.check-list li::before{content:"✓";color:var(--pulse-2);font-weight:700;flex-shrink:0;}
.faq{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);padding:18px 0;}
.faq-item summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:1.3rem;color:var(--text-faint);}
.faq-item[open] summary::after{content:"–";}
.faq-item p{color:var(--text-soft);margin-top:12px;font-size:.92rem;}

/* Pricing */
.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:stretch;}
.price-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:28px 22px;display:flex;flex-direction:column;}
.price-card--featured{border-color:var(--signal);box-shadow:var(--shadow-md);position:relative;}
.price-card--featured::before{content:"Most popular";position:absolute;top:-12px;left:22px;background:var(--signal);color:#fff;font-size:.7rem;font-weight:700;padding:4px 10px;border-radius:999px;font-family:var(--font-mono);}
.price-card__name{font-family:var(--font-display);font-weight:600;font-size:1.15rem;margin-bottom:6px;}
.price-card__price{font-family:var(--font-mono);font-size:1.7rem;font-weight:600;margin-bottom:4px;}
.price-card__unit{font-size:.78rem;color:var(--text-faint);margin-bottom:18px;}
.price-card p.desc{font-size:.85rem;color:var(--text-soft);margin-bottom:18px;}
.price-card .check-list{margin-bottom:22px;flex:1;}
.price-card .check-list li{font-size:.85rem;}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.contact-form{display:flex;flex-direction:column;gap:14px;}
.field{display:flex;flex-direction:column;gap:6px;font-size:.82rem;font-weight:600;color:var(--text-soft);}
.field input, .field select, .field textarea{
  font-family:var(--font-body);font-size:.95rem;padding:11px 13px;border-radius:var(--radius-sm);
  border:1.5px solid var(--border-2);background:var(--surface);color:var(--text);
}
.contact-info{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px;}
.contact-info h3{font-size:1rem;margin-bottom:14px;}
.contact-info__item{display:flex;gap:12px;margin-bottom:16px;font-size:.9rem;color:var(--text-soft);}
.contact-info__item strong{display:block;color:var(--text);font-size:.9rem;}

/* API / Developers */
.code-block{background:var(--ink);color:#DDEAFF;font-family:var(--font-mono);font-size:.8rem;border-radius:var(--radius-md);padding:18px 20px;overflow-x:auto;line-height:1.6;}
.code-block .k{color:#5FE0D6;}
.code-block .s{color:#F5C97B;}
.endpoint-table{width:100%;border-collapse:collapse;font-size:.86rem;}
.endpoint-table th{text-align:left;font-family:var(--font-mono);font-size:.72rem;text-transform:uppercase;color:var(--text-faint);border-bottom:1px solid var(--border);padding:10px 12px;}
.endpoint-table td{padding:12px;border-bottom:1px solid var(--border);}
.endpoint-table code{font-family:var(--font-mono);font-size:.82rem;background:var(--bg);padding:2px 6px;border-radius:5px;}
.method{font-family:var(--font-mono);font-weight:700;font-size:.72rem;padding:2px 8px;border-radius:5px;}
.method--get{background:var(--pulse-soft);color:var(--pulse-2);}
.method--post{background:var(--signal-soft);color:var(--signal);}

/* =================== RESPONSIVE =================== */
@media (max-width:1080px){
  .value-grid{grid-template-columns:repeat(2,1fr);}
  .pulse-grid{grid-template-columns:repeat(2,1fr);}
  .solutions-grid{grid-template-columns:repeat(3,1fr);}
  .metrics-grid{grid-template-columns:repeat(3,1fr);}
  .testimonial-grid{grid-template-columns:1fr;}
  .resources-grid{grid-template-columns:repeat(2,1fr);}
  .pricing-grid{grid-template-columns:repeat(2,1fr);}
  .lifecycle-wrap, .arch-wrap, .two-col, .contact-grid{grid-template-columns:1fr;}
  .footer__grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:720px){
  .main-nav{display:none;}
  .hamburger{display:flex;}
  .value-grid,.pulse-grid,.solutions-grid,.metrics-grid,.resources-grid,.pricing-grid{grid-template-columns:1fr;}
  .footer__grid{grid-template-columns:1fr;}
}