:root{
  color-scheme:light;
  --text:28,42,34;
  --head:22,36,28;
  --label:30,110,72;
  --border:40,130,85;
  --surface:255,255,255;
  --edge:255,255,255;
  --shadow:40,130,90;
  --veil:228,244,232;
  --chip:#eef5ee;
  --head-from:#10231a;
  --bg-grad:linear-gradient(160deg,#fcfdfb 0%,#f3f8f3 28%,#eef5ec 52%,#e9f3ea 72%,#e6f2ec 100%);
}
html[data-theme="dark"]{
  color-scheme:dark;
  --text:235,235,235;
  --head:255,255,255;
  --label:30,215,96;
  --border:120,120,120;
  --surface:24,24,24;
  --edge:70,70,70;
  --shadow:0,0,0;
  --veil:0,0,0;
  --chip:#1a1a1a;
  --head-from:#ffffff;
  --bg-grad:#121212;
}
body{transition:color .35s ease;}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
[data-screen-label]{color:rgba(var(--text),1);}
h1,h2,h3,h4,h5,h6{color:rgba(var(--head),1);}
[data-screen-label]{min-height:100vh;}
html:not([data-theme="dark"]) [data-screen-label]{background:linear-gradient(160deg,#fcfdfb 0%,#f3f8f3 28%,#eef5ec 52%,#e9f3ea 72%,#e6f2ec 100%);}
html[data-theme="dark"] [data-screen-label]{background:#121212;}
html:not([data-theme="dark"]) body{background:#fcfdfb;}
html[data-theme="dark"] body{background:#121212;}
body{margin:0;color:rgba(var(--text),1);font-family:'Manrope',system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
::selection{background:#c7ecd6;color:#12231a;}
::-webkit-scrollbar{width:9px;}
::-webkit-scrollbar-track{background:var(--chip);}
::-webkit-scrollbar-thumb{background:rgba(40,150,95,0.4);border-radius:8px;}
input,select,textarea{font-family:'Manrope',sans-serif;}
input::placeholder,textarea::placeholder{color:rgba(90,72,120,0.5);}
input:focus,select:focus,textarea:focus{outline:none;border-color:rgba(var(--border),0.6)!important;}
a{ -webkit-tap-highlight-color:transparent; }
@keyframes ai-wave{0%,100%{transform:scaleY(0.22);}50%{transform:scaleY(1);}}
@keyframes ai-rise{from{opacity:0;transform:translateY(28px);}to{opacity:1;transform:translateY(0);}}
@keyframes ai-pulse{0%,100%{opacity:0.5;}50%{opacity:1;}}
@keyframes ai-caret{0%,49%{opacity:1;}50%,100%{opacity:0;}}
@keyframes ai-dot{0%,60%,100%{transform:translateY(0);opacity:0.4;}30%{transform:translateY(-5px);opacity:1;}}
@keyframes ai-ring{0%{transform:scale(0.55);opacity:0.65;}100%{transform:scale(2.3);opacity:0;}}
@keyframes ai-float{0%,100%{transform:translateY(0);}50%{transform:translateY(-6px);}}
@keyframes ai-spin{to{transform:rotate(360deg);}}

/* nav hover + button hover (replaces the runtime's style-hover attribute) */
nav a.nav-link{transition:color .2s ease;}
nav a.nav-link:hover{color:rgba(var(--head),1)!important;}
.ai-card{transition:box-shadow .32s cubic-bezier(.2,.8,.2,1),border-color .32s;}
.ai-card:hover{box-shadow:0 40px 78px -26px rgba(var(--shadow),0.46),inset 0 1px 0 rgba(var(--edge),0.95)!important;border-color:rgba(var(--border),0.55)!important;}
.theme-toggle{transition:transform .2s ease,border-color .3s ease;}
.theme-toggle:hover{transform:scale(1.08);border-color:rgba(var(--border),0.6);}

/* ---------- Mobile navigation (hamburger) ---------- */
.nav-toggle{display:none;background:rgba(var(--surface),0.6);border:1px solid rgba(var(--border),0.32);border-radius:50%;width:38px;height:38px;cursor:pointer;color:rgba(var(--head),1);align-items:center;justify-content:center;flex:none;}
@media(max-width:860px){
  .nav-toggle{display:inline-flex;}
  nav .nav-cta{display:none!important;}
  .nav-menu{position:absolute;top:100%;left:0;right:0;flex-direction:column!important;align-items:stretch!important;gap:0!important;
    background:rgba(var(--surface),0.98);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(var(--border),0.18);box-shadow:0 26px 54px -20px rgba(var(--shadow),0.5);
    padding:8px 0;display:none!important;max-height:80vh;overflow:auto;}
  .nav-menu.open{display:flex!important;}
  .nav-menu a{padding:14px 26px!important;font-size:15px!important;width:100%;}
  .nav-menu .nav-cta{margin:10px 26px!important;justify-content:center;text-align:center;}
}

/* ---------- Responsive grids / spacing ---------- */
@media(max-width:1024px){
  .ai-grid-4{grid-template-columns:repeat(2,1fr)!important;}
  .ai-grid-3{grid-template-columns:1fr!important;}
  .ai-voices-grid{grid-template-columns:1fr!important;}
  .ai-industries-grid{grid-template-columns:1fr!important;}
  .ai-process-grid{grid-template-columns:repeat(3,1fr)!important;gap:28px 0!important;}
  .ai-process-rail{display:none!important;}  /* single horizontal rail can't connect a wrapped multi-row grid */
  .ai-footer-grid{grid-template-columns:1fr 1fr!important;}
  section{padding-left:40px!important;padding-right:40px!important;}
  footer{padding-left:40px!important;padding-right:40px!important;}
  #artintele-scroll-rail{display:none!important;}
}
@media(max-width:680px){
  nav{padding:13px 18px!important;}
  section{padding-left:20px!important;padding-right:20px!important;padding-top:90px!important;}
  footer{padding-left:20px!important;padding-right:20px!important;}
  .ai-grid-4{grid-template-columns:1fr!important;}
  .ai-process-grid{grid-template-columns:repeat(2,1fr)!important;gap:30px 0!important;}
  .ai-footer-grid{grid-template-columns:1fr!important;}
  .ai-form-2{grid-template-columns:1fr!important;}
  #artintele-scroll-rail{display:none!important;}
}
@media(max-width:420px){
  .ai-process-grid{grid-template-columns:1fr!important;}
}

/* ---------- Mobile overflow guards & polish ---------- */
/* App-wide safety net: nothing should scroll the page sideways on a phone. */
html, body { overflow-x: hidden; }
/* Stop flex/grid children (e.g. the voice waveform) from forcing a column
   wider than the screen, which previously clipped the Custom AI Voices copy. */
.ai-voices-grid > div, .ai-industries-grid > div, .ai-grid-4 > *, .ai-grid-3 > * { min-width: 0; }
#artintele-voicewave { overflow: hidden; }

@media(max-width:680px){
  #voices > div { padding: 26px !important; }      /* was 52px — too tight on phones */
  .ai-voices-grid { gap: 26px !important; }
  #artintele-voicewave { height: 92px !important; }
  .ai-cta-card { padding: 40px 22px !important; }   /* big centred CTA cards */
  .ai-pad-lg { padding: 28px !important; }          /* large glass cards (forms, panels) */
}