/* ============================================
   Kortex — Design tokens
   ============================================ */
:root{
  --bg:            #0a0a12;
  --bg-elevated:   #11111c;
  --bg-card:       #14141f;
  --bg-card-2:     #16151f;
  --border:        #24242f;
  --border-soft:   #1c1c28;

  --text:          #f5f5f7;
  --text-dim:      #a8a8b8;
  --text-muted:    #7a7a8c;

  --violet:        #7c5cff;
  --violet-2:      #5b3df0;
  --indigo:        #4f46e5;
  --blue:          #3b82f6;
  --green:         #22c55e;
  --purple:        #a855f7;
  --orange:        #fb7a2f;

  --grad-primary:  linear-gradient(135deg, #7c5cff 0%, #4f46e5 100%);
  --grad-text:     linear-gradient(135deg, #a78bfa 0%, #818cf8 100%);
  --grad-glow:     radial-gradient(circle, rgba(124,92,255,0.35) 0%, rgba(124,92,255,0) 70%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4,h5,p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

.container{
  max-width:1650px;
  margin:0 auto;
  padding:0 24px;
}
.muted{ color:var(--text-muted); }
.grad-text{
  background:var(--grad-text);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--violet);
  outline-offset:2px;
  border-radius:4px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}

/* ============================================
   Buttons
   ============================================ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border-radius:10px;
  font-weight:600;
  font-size:14.5px;
  white-space:nowrap;
  transition:transform .15s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.btn .arrow{ transition:transform .15s ease; }
.btn:hover .arrow{ transform:translateX(3px); }

.btn--primary{
  background:var(--grad-primary);
  color:#fff;
  padding:11px 20px;
  box-shadow:0 4px 20px rgba(124,92,255,0.35);
}
.btn--primary:hover{ transform:translateY(-1px); box-shadow:0 6px 26px rgba(124,92,255,0.5); }

.btn--outline{
  background:transparent;
  color:var(--text);
  border:1px solid var(--border);
  padding:11px 20px;
}
.btn--outline:hover{ border-color:#3a3a4a; background:rgba(255,255,255,0.03); }

.btn--ghost{
  background:transparent;
  color:var(--text-dim);
  border:1px solid var(--border);
  padding:8px 16px;
  font-size:14px;
}
.btn--ghost:hover{ color:var(--text); border-color:#3a3a4a; }

.btn--sm{ padding:8px 16px; font-size:14px; }
.btn--lg{ padding:13px 24px; font-size:15px; }
.icon-ext{ font-size:13px; opacity:.7; }

/* ============================================
   Navbar
   ============================================ */
.nav{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(10,10,18,0.75);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-soft);
}
.nav__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:68px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:18px;
  letter-spacing:-0.01em;
}
.brand__mark{
  display:flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:8px;
  background:var(--grad-primary);
}
.brand__logo{
  height:58px;
  width:auto;
  object-fit:contain;
}
.nav__links{
  display:flex;
  align-items:center;
  gap:32px;
}
.nav__links a{
  font-size:14.5px;
  color:var(--text-dim);
  transition:color .15s ease;
}
.nav__links a:hover{ color:var(--text); }
.nav__actions{ display:flex; align-items:center; gap:12px; }

@media (max-width:900px){
  .nav__links{ display:none; }
}

/* ============================================
   Hero
   ============================================ */
.hero{
  position:relative;
  padding:80px 0 0;
  overflow:hidden;
}
.hero__glow{
  position:absolute;
  top:-100px;
  right:-100px;
  width:700px;
  height:700px;
  background:var(--grad-glow);
  pointer-events:none;
  z-index:0;
}
.hero__grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border:1px solid var(--border);
  border-radius:999px;
  font-size:13px;
  color:var(--text-dim);
  background:rgba(124,92,255,0.06);
  margin-bottom:24px;
}
.eyebrow__dot{ color:var(--violet); }

.hero__title{
  font-size:52px;
  font-weight:800;
  letter-spacing:-0.025em;
  line-height:1.08;
  margin-bottom:22px;
}
.hero__subtitle{
  font-size:17px;
  color:var(--text-dim);
  max-width:480px;
  line-height:1.65;
  margin-bottom:32px;
}
.hero__cta{
  display:flex;
  gap:14px;
  margin-bottom:28px;
  flex-wrap:wrap;
}
.hero__checks{
  display:flex;
  gap:24px;
  flex-wrap:wrap;
}
.hero__checks li{
  display:flex;
  align-items:center;
  gap:7px;
  font-size:13.5px;
  color:var(--text-muted);
}
.check{ width:15px; height:15px; color:var(--violet); flex-shrink:0; }

/* Hero art */
.hero__art{
  position:relative;
  height:420px;
}
.art__platform{
  position:absolute;
  top:50%; left:50%;
  transform:translate(-50%,-50%);
  width:180px; height:180px;
  display:flex; align-items:center; justify-content:center;
}
.art__ring{
  position:absolute;
  border-radius:50%;
  border:1px solid rgba(124,92,255,0.25);
}
.art__ring--1{ width:340px; height:340px; }
.art__ring--2{ width:250px; height:250px; border-color:rgba(124,92,255,0.35); }
.art__cube{
  position:relative;
  z-index:2;
  width:88px; height:88px;
  border-radius:22px;
  background:linear-gradient(160deg,#3a2f6e 0%, #1a1330 100%);
  border:1px solid rgba(124,92,255,0.4);
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 0 60px rgba(124,92,255,0.45), inset 0 1px 0 rgba(255,255,255,0.08);
}

.chip{
  position:absolute;
  display:flex;
  align-items:center;
  gap:10px;
  background:rgba(20,20,31,0.9);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  backdrop-filter:blur(6px);
  box-shadow:0 8px 24px rgba(0,0,0,0.35);
  max-width:210px;
}
.chip__icon{
  flex-shrink:0;
  width:32px; height:32px;
  border-radius:9px;
  display:flex; align-items:center; justify-content:center;
}
.chip__icon--blue{ background:linear-gradient(135deg,#3b82f6,#2563eb); }
.chip__icon--green{ background:linear-gradient(135deg,#22c55e,#16a34a); }
.chip__icon--purple{ background:linear-gradient(135deg,#a855f7,#7c3aed); }
.chip__text{ display:flex; flex-direction:column; gap:2px; }
.chip__text strong{ font-size:13.5px; font-weight:600; }
.chip__text em{ font-style:normal; font-size:11.5px; color:var(--text-muted); line-height:1.3; }

.chip--rag{ top:6%; left:2%; }
.chip--pg{ top:2%; right:0%; }
.chip--vector{ bottom:28%; left:-4%; }
.chip--memory{ bottom:10%; right:-2%; }

@media (max-width:1050px){
  .hero__grid{ grid-template-columns:1fr; }
  .hero__art{ display:none; }
  .hero__title{ font-size:40px; }
}

/* Logos strip */
.logos{
  margin-top:64px;
  padding:32px 0 56px;
  text-align:center;
  position:relative;
  z-index:1;
}
.logos__label{
  font-size:12px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin-bottom:26px;
}
.logos__row{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:48px;
  flex-wrap:wrap;
}
.logo-item{
  font-size:16px;
  font-weight:600;
  color:#5a5a6c;
  letter-spacing:-0.01em;
}

/* ============================================
   Features
   ============================================ */
.features{
  background:var(--bg-elevated);
  border-top:1px solid var(--border-soft);
  border-bottom:1px solid var(--border-soft);
  padding:88px 0;
}
.section-title{
  text-align:center;
  font-size:34px;
  font-weight:800;
  letter-spacing:-0.02em;
  margin-bottom:56px;
}

.feature-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--border-soft);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-lg);
  overflow:hidden;
  margin-bottom:64px;
}
.feature{
  background:var(--bg-elevated);
  padding:36px 32px;
}
.feature__icon{
  width:44px; height:44px;
  border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:20px;
  background:rgba(255,255,255,0.04);
}
.feature__icon--blue{ color:var(--blue); }
.feature__icon--green{ color:var(--green); }
.feature__icon--purple{ color:var(--purple); }
.feature__icon--purple2{ color:#c084fc; }
.feature__icon--orange{ color:var(--orange); }
.feature__icon--blue2{ color:#38bdf8; }
.feature h3{
  font-size:16.5px;
  font-weight:600;
  margin-bottom:10px;
}
.feature p{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.55;
}

@media (max-width:900px){
  .feature-grid{ grid-template-columns:1fr; }
}

/* API panel */
.api-panel{
  display:grid;
  grid-template-columns: 0.9fr 1.15fr 0.75fr;
  gap:0;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.api-panel__left{
  padding:32px 36px 40px;
  border-right:1px solid var(--border-soft);
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  min-height:0;
}
.api-panel__left h3{
  font-size:24px;
  font-weight:800;
  letter-spacing:-0.015em;
  margin-bottom:14px;
}
.api-panel__lead{
  font-size:14.5px;
  color:var(--text-muted);
  line-height:1.6;
  margin-bottom:28px;
}
.api-list{ display:flex; flex-direction:column; gap:20px; margin-bottom:28px; }
.api-list li{ display:flex; gap:12px; align-items:flex-start; }
.api-list__icon{
  flex-shrink:0;
  width:30px; height:30px;
  border-radius:8px;
  background:rgba(124,92,255,0.12);
  color:var(--violet);
  display:flex; align-items:center; justify-content:center;
  font-size:13px;
}
.api-list strong{ font-size:14px; font-weight:600; display:block; margin-bottom:2px; }
.api-list span span{ font-size:13px; color:var(--text-muted); }
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--violet);
  font-size:14px;
  font-weight:600;
}
.link-arrow .arrow{ transition:transform .15s ease; }
.link-arrow:hover .arrow{ transform:translateX(3px); }

.api-panel__mid{
  padding:32px 28px;
  border-right:1px solid var(--border-soft);
  display:flex;
  flex-direction:column;
}
.code-window{
  position:relative;
  width:100%;
  height:100%;
  display:flex;
  flex-direction:column;
  background:#0d0d16;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-md);
  overflow:hidden;
}
.code-window__tabs{
  display:flex;
  gap:4px;
  padding:10px 14px;
  border-bottom:1px solid var(--border-soft);
  flex-shrink:0;
}
.tab{
  font-size:12.5px;
  padding:6px 12px;
  border-radius:6px;
  color:var(--text-muted);
  background:transparent;
  border:none;
  font-family:inherit;
  transition:background .15s ease, color .15s ease;
}
.tab:hover{ color:var(--text-dim); }
.tab--active{ background:var(--bg-card); color:var(--text); }
.tab--active:hover{ color:var(--text); }
.code-window__body{
  margin:0;
  padding:20px;
  padding-bottom:52px; /* keep last code line clear of the floating copy button */
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.8;
  color:#c8c8dc;
  flex:1;
  min-height:0;
  overflow:auto;
  position:relative;
}
.tok-fn{ color:#7dd3fc; }
.tok-flag{ color:#a78bfa; }
.tok-str{ color:#86efac; }
.tok-key{ color:#93c5fd; }
.tok-num{ color:#fca5a5; }

.copy-btn{
  position:absolute;
  bottom:14px;
  right:16px;
  background:var(--bg-card);
  border:1px solid var(--border);
  color:var(--text-dim);
  font-size:11.5px;
  padding:6px 10px;
  border-radius:6px;
}
.copy-btn:hover{ color:var(--text); border-color:#3a3a4a; }

.api-panel__right{
  padding:32px 30px;
  display:flex;
  flex-direction:column;
}
.api-panel__right h4{ font-size:15px; font-weight:600; margin-bottom:4px; flex-shrink:0; }
.api-panel__right p{ font-size:13px; margin-bottom:16px; flex-shrink:0; }
.response-window{
  margin:0;
  background:#0d0d16;
  border:1px solid var(--border-soft);
  border-radius:var(--radius-md);
  padding:16px;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.75;
  color:#c8c8dc;
  flex:1;
  min-height:0;
  overflow:auto;
  white-space:pre-wrap;
  word-break:break-word;
}

/* Fixed panel height on desktop so switching code tabs never resizes
   the surrounding columns — each column fills it and scrolls
   internally if its own content ever runs longer than the space. */
@media (min-width:1051px){
  .api-panel{ height:600px; }
}

@media (max-width:1050px){
  .api-panel{ grid-template-columns:1fr; }
  .api-panel__left, .api-panel__mid{ border-right:none; border-bottom:1px solid var(--border-soft); }
}

/* ============================================
   How it works
   ============================================ */
.how{ padding:96px 0; }
.steps{
  position:relative;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:4px;
  margin-top:8px;
}
/* Continuous dashed line running through every icon's vertical center.
   Icons sit on top with a matching background so the line visually
   "connects" one icon to the next, exactly like the reference design.
   left/right are set in % so the line always lines up with the icon
   centers no matter the container width (5 equal-width flex items:
   center of item k = (k-0.5)/5 of the row width -> first=10%, last=90%). */
.steps::before{
  content:'';
  position:absolute;
  top:28px;
  left:10%;
  right:10%;
  height:0;
  border-top:1px dashed #3a3a4e;
  z-index:0;
}
.step{
  position:relative;
  z-index:1;
  flex:1;
  min-width:0;
  text-align:center;
  padding:0 8px;
}
.step__icon{
  width:56px; height:56px;
  margin:0 auto 18px;
  border-radius:50%;
  background:var(--bg);
  border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  font-size:19px;
}
.step h4{ font-size:15px; font-weight:600; margin-bottom:8px; }
.step p{ font-size:13px; color:var(--text-muted); line-height:1.55; }

@media (max-width:1000px){
  .step p{ display:none; }
  .step h4{ font-size:13px; }
  .step__icon{ width:46px; height:46px; font-size:16px; margin-bottom:10px; }
  .steps::before{ top:23px; }
}

@media (max-width:620px){
  .steps{ flex-direction:column; align-items:flex-start; gap:28px; }
  .steps::before{ display:none; }
  .step{ display:flex; align-items:center; gap:14px; text-align:left; padding:0; }
  .step__icon{ margin:0; flex-shrink:0; }
  .step p{ display:block; }
}

/* ============================================
   Testimonial
   ============================================ */
.testimonial{ padding:0 0 96px; }
.testimonial-card{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:44px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.testimonial-card__quote{
  font-family:Georgia, serif;
  font-size:64px;
  color:var(--violet);
  opacity:0.5;
  line-height:1;
  flex-shrink:0;
}
.testimonial-card__body p{
  font-size:16.5px;
  line-height:1.6;
  color:var(--text-dim);
  margin-bottom:20px;
  max-width:640px;
}
.testimonial-card__author{ display:flex; align-items:center; gap:12px; }
.avatar{
  width:42px; height:42px;
  border-radius:50%;
  background:linear-gradient(135deg,#f59e0b,#ef4444);
  flex-shrink:0;
}
.testimonial-card__author strong{ display:block; font-size:14px; }
.testimonial-card__author .muted{ font-size:13px; }
.testimonial-card__stars{
  flex-shrink:0;
  color:#facc15;
  letter-spacing:2px;
  font-size:16px;
}

@media (max-width:800px){
  .testimonial-card{ flex-direction:column; align-items:flex-start; }
}

/* ============================================
   CTA
   ============================================ */
.cta{ padding-bottom:96px; }
.cta-card{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  background:linear-gradient(120deg, rgba(124,92,255,0.12), rgba(79,70,229,0.06));
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:40px 48px;
  overflow:hidden;
}
.cta-card__cube{
  position:absolute;
  left:24px; top:50%;
  transform:translateY(-50%);
  width:64px; height:64px;
  border-radius:16px;
  background:var(--grad-primary);
  display:flex; align-items:center; justify-content:center;
  opacity:0.15;
}
.cta-card__text{ position:relative; z-index:1; }
.cta-card__text h3{ font-size:26px; font-weight:800; margin-bottom:6px; letter-spacing:-0.015em; }
.cta-card__text p{ font-size:14.5px; color:var(--text-muted); }
.cta-card__actions{ position:relative; z-index:1; display:flex; gap:14px; flex-shrink:0; }

@media (max-width:800px){
  .cta-card{ flex-direction:column; text-align:center; }
  .cta-card__cube{ display:none; }
}

/* ============================================
   Footer
   ============================================ */
.footer{
  border-top:1px solid var(--border-soft);
  padding:64px 0 32px;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:48px;
}
.footer__brand p{
  font-size:13.5px;
  color:var(--text-muted);
  line-height:1.6;
  margin:16px 0 20px;
}
.footer__socials{ display:flex; gap:14px; }
.footer__socials a{
  color:var(--text-muted);
  transition:color .15s ease;
}
.footer__socials a:hover{ color:var(--text); }

.footer__col h5{
  font-size:13px;
  font-weight:600;
  margin-bottom:16px;
  color:var(--text);
}
.footer__col{ display:flex; flex-direction:column; gap:12px; }
.footer__col a{
  font-size:13.5px;
  color:var(--text-muted);
  transition:color .15s ease;
}
.footer__col a:hover{ color:var(--text); }

.footer__bottom{
  border-top:1px solid var(--border-soft);
  padding-top:24px;
  text-align:center;
}
.footer__bottom p{ font-size:12.5px; color:var(--text-muted); }

@media (max-width:900px){
  .footer__grid{ grid-template-columns:1fr 1fr; }
}