/* ============================================================
   vortroid — light, vibrant "engineering × AI" identity
   ============================================================ */
:root{
  --bg:#FBFBFE; --bg-2:#F3F4FB; --panel:#FFFFFF; --panel-2:#F7F8FE;
  --ink:#14141F; --muted:#54546B; --faint:#86869E;
  --line:rgba(20,20,45,.10); --line-2:rgba(20,20,45,.16);
  --indigo:#6D5BFF; --indigo-ink:#4B39E0; --cyan:#0FB6D6; --cyan-2:#22D3EE; --magenta:#FF4D9D;
  --grad: linear-gradient(115deg,#6D5BFF 0%,#22D3EE 55%,#FF4D9D 110%);
  --grad-2: linear-gradient(120deg,#7C6BFF,#22D3EE);
  --grad-soft: linear-gradient(120deg,rgba(109,91,255,.10),rgba(34,211,238,.08));
  --radius:18px; --radius-sm:12px; --radius-lg:26px; --maxw:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow:0 24px 60px -28px rgba(50,40,120,.30);
  --shadow-sm:0 10px 30px -18px rgba(50,40,120,.30);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"Inter",system-ui,sans-serif;line-height:1.62;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:"JetBrains Mono",monospace;font-weight:500}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ambient backgrounds (light) */
.bg-grid{position:fixed;inset:0;z-index:-2;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,#000 30%,transparent 95%);opacity:.55}
.bg-glow{position:fixed;inset:0;z-index:-3;pointer-events:none;
  background:
    radial-gradient(40% 32% at 12% 6%,rgba(124,107,255,.22),transparent 70%),
    radial-gradient(36% 30% at 88% 10%,rgba(34,211,238,.20),transparent 72%),
    radial-gradient(50% 42% at 50% 108%,rgba(255,77,157,.14),transparent 72%)}

/* type */
h1,h2,h3,h4,.section__title,.hero__title,.brand__word{font-family:"Space Grotesk",sans-serif;line-height:1.05;letter-spacing:-.02em}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.05em;color:var(--indigo-ink);text-transform:uppercase;font-weight:600}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--grad);box-shadow:0 0 10px rgba(109,91,255,.7)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;border-radius:var(--radius-sm);font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:15px;padding:13px 20px;cursor:pointer;border:1px solid transparent;transition:transform .15s var(--ease),box-shadow .2s,background .2s,border-color .2s;will-change:transform}
.btn i{width:18px;height:18px}
.btn--sm{padding:9px 15px;font-size:14px}
.btn--full{width:100%;justify-content:center;padding:16px}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 14px 30px -10px rgba(109,91,255,.55)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 20px 44px -12px rgba(34,211,238,.5)}
.btn--ghost{background:#fff;border-color:var(--line-2);color:var(--ink);box-shadow:var(--shadow-sm)}
.btn--ghost:hover{border-color:var(--indigo);background:#fff;transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.985)}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,border-color .3s,box-shadow .3s;border-bottom:1px solid transparent}
.nav.is-stuck{background:rgba(251,251,254,.82);backdrop-filter:blur(14px);border-color:var(--line);box-shadow:0 8px 30px -22px rgba(50,40,120,.5)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:inline-flex;align-items:center;gap:11px;font-weight:700}
.brand__word{font-size:21px;letter-spacing:-.03em}
.brand__mark{width:22px;height:22px;border-radius:7px;background:var(--grad);box-shadow:0 6px 16px -4px rgba(109,91,255,.6);position:relative}
.brand__mark::after{content:"";position:absolute;inset:5px;border-radius:4px;background:var(--bg)}
.nav__links{display:flex;align-items:center;gap:28px;font-size:15px;color:var(--muted);font-weight:500}
.nav__links a:not(.btn):hover{color:var(--ink)}
.nav__burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__burger span{width:24px;height:2px;background:var(--ink);transition:.25s;border-radius:2px}
.nav__mobile{display:none;flex-direction:column;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line)}
.nav__mobile a{padding:16px 24px;border-top:1px solid var(--line);color:var(--muted)}

/* hero */
.hero{padding:150px 0 64px;position:relative}
.hero__inner{display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center}
.hero__title{font-size:clamp(42px,6vw,76px);font-weight:700;margin:22px 0 20px;color:var(--ink)}
.hero__lede{font-size:18.5px;color:var(--muted);max-width:560px}
.hero__cta{display:flex;gap:14px;margin:34px 0 26px;flex-wrap:wrap}
.hero__chips{display:flex;gap:10px;flex-wrap:wrap;color:var(--faint);font-size:13px}
.hero__chips span{padding:6px 12px;border:1px solid var(--line);border-radius:99px;background:#fff}
.hero__visual{position:relative;display:flex;flex-direction:column;align-items:center}
.hero__visual::before{content:"";position:absolute;inset:6% 4%;border-radius:50%;background:var(--grad);filter:blur(70px);opacity:.20;z-index:-1}
#motif{max-width:100%;height:auto}
.hero__visual-caption{margin-top:6px;color:var(--faint);font-size:12px;letter-spacing:.1em}

/* marquee */
.marquee{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;margin:26px 0;mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee__track{display:flex;gap:26px;align-items:center;white-space:nowrap;width:max-content;animation:scroll 40s linear infinite;font-family:"Space Grotesk";font-weight:600;font-size:15px;letter-spacing:.06em;color:var(--faint)}
.marquee__track b{color:var(--indigo)}
@keyframes scroll{to{transform:translateX(-50%)}}

/* sections */
.section{padding:90px 0;position:relative}
.section--alt{background:linear-gradient(180deg,transparent,var(--bg-2),transparent)}
.section__head{margin-bottom:46px;max-width:700px}
.section__head--center{margin-inline:auto;text-align:center}
.section__title{font-size:clamp(30px,4vw,48px);font-weight:700;margin-top:14px;color:var(--ink)}
.section__sub{color:var(--muted);font-size:17px;margin-top:16px}

/* bento services */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.card{grid-column:span 2;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;position:relative;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.card--lg{grid-column:span 3}
.card::after{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--grad);opacity:0;transition:opacity .35s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card:hover::after{opacity:1}
.card__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.card__icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid var(--line);color:var(--indigo-ink)}
.card__icon i{width:22px;height:22px}
.card__kicker{font-size:11.5px;color:var(--faint);letter-spacing:.04em}
.card__title{font-size:21px;font-weight:600;margin-bottom:10px;color:var(--ink)}
.card--lg .card__title{font-size:25px}
.card__body{color:var(--muted);font-size:15px;flex:1}
.card__tags{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0 16px}
.tag{font-size:11.5px;color:var(--indigo-ink);padding:4px 10px;border:1px solid var(--line);border-radius:99px;background:var(--panel-2)}
.card__link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--indigo-ink);font-weight:600}
.card__link i{width:15px;height:15px;transition:transform .2s}
.card__link:hover i{transform:translate(2px,-2px)}

/* portfolio / work */
.work{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.work-card{grid-column:span 1;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),box-shadow .3s;display:flex;flex-direction:column}
.work-card--feat{grid-column:span 2}
.work-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}
.work-card__banner{height:120px;position:relative;display:flex;align-items:flex-end;padding:16px 20px;overflow:hidden}
.work-card__banner.indigo{background:linear-gradient(120deg,#6D5BFF,#9B7BFF)}
.work-card__banner.cyan{background:linear-gradient(120deg,#0FB6D6,#22D3EE)}
.work-card__banner.magenta{background:linear-gradient(120deg,#FF4D9D,#FF8AC4)}
.work-card__banner::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.16) 1px,transparent 1px);background-size:26px 26px;mask-image:radial-gradient(120% 120% at 80% -20%,#000,transparent)}
.work-card__url{position:relative;color:#fff;font-family:"JetBrains Mono";font-size:13px;background:rgba(0,0,0,.18);padding:5px 10px;border-radius:99px;backdrop-filter:blur(4px)}
.work-card__body{padding:22px;display:flex;flex-direction:column;flex:1}
.work-card__cat{font-family:"JetBrains Mono";font-size:11.5px;color:var(--faint);letter-spacing:.04em;text-transform:uppercase}
.work-card__name{font-size:22px;font-weight:700;margin:8px 0 8px;color:var(--ink)}
.work-card__name .live{font-size:10px;vertical-align:middle;color:#10B981;border:1px solid rgba(16,185,129,.4);background:rgba(16,185,129,.10);padding:2px 7px;border-radius:99px;margin-left:8px;font-family:"JetBrains Mono"}
.work-card__desc{color:var(--muted);font-size:14.5px;flex:1}
.work-card__foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;gap:10px;flex-wrap:wrap}
.work-card__tags{display:flex;gap:6px;flex-wrap:wrap}
.work-card__visit{display:inline-flex;align-items:center;gap:5px;font-size:13.5px;font-weight:600;color:var(--indigo-ink)}
.work-card__visit i{width:15px;height:15px}
.work-card__private{font-size:12.5px;color:var(--faint);font-family:"JetBrains Mono"}

/* legacy */
.legacy-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:44px;align-items:center}
.legacy-list{display:grid;gap:14px}
.legacy-item{display:flex;gap:16px;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s}
.legacy-item:hover{transform:translateX(4px);box-shadow:var(--shadow)}
.legacy-item__icon{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--grad-soft);border:1px solid var(--line);color:var(--indigo-ink)}
.legacy-item__icon i{width:21px;height:21px}
.legacy-item__title{font-family:"Space Grotesk";font-size:17px;font-weight:600;margin-bottom:4px}
.legacy-item__body{color:var(--muted);font-size:14px}
.legacy-flow{padding:6px}
.legacy-flow__title{font-family:"Space Grotesk";font-weight:600;font-size:18px;margin-bottom:18px;color:var(--ink)}
.flow-steps{display:flex;flex-wrap:wrap;gap:10px}
.flow-pill{font-family:"JetBrains Mono";font-size:13px;padding:9px 14px;border-radius:99px;border:1px solid var(--line);background:#fff;color:var(--ink)}
.flow-pill.on{background:var(--grad);color:#fff;border-color:transparent}

/* steps (process) */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step{padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow-sm);position:relative}
.step__n{font-family:"Space Grotesk";font-weight:700;font-size:22px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.step__title{font-size:20px;font-weight:600;margin:12px 0 8px}
.step__body{color:var(--muted);font-size:14.5px}

/* why */
.why{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.why__lede{color:var(--muted);font-size:17px;margin-top:20px;max-width:520px}
.why__stats{display:flex;flex-direction:column;gap:16px}
.stat{padding:24px 26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow-sm)}
.stat__k{font-family:"Space Grotesk";font-size:24px;font-weight:700}
.stat__v{color:var(--muted);font-size:15px;margin-top:4px}

/* contact */
.section--contact{padding-bottom:110px}
.contact{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.contact__mail{display:inline-flex;align-items:center;gap:9px;margin-top:26px;color:var(--indigo-ink);font-size:15px;font-weight:600}
.contact__mail i{width:18px;height:18px}
.contact__form{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.field span{font-size:13.5px;color:var(--muted);font-weight:500}
.field em{color:var(--faint);font-style:normal}
.field input,.field select,.field textarea{background:var(--bg);border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:13px 14px;color:var(--ink);font-family:inherit;font-size:15px;transition:border-color .2s,box-shadow .2s}
.field textarea{resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--indigo);box-shadow:0 0 0 3px rgba(109,91,255,.16)}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.alert{padding:12px 14px;border-radius:var(--radius-sm);font-size:14px;margin-bottom:16px}
.alert--ok{background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.4);color:#0a7a57}
.alert--err{background:rgba(255,77,157,.12);border:1px solid rgba(255,77,157,.45);color:#b32568}

/* footer */
.footer{border-top:1px solid var(--line);padding:60px 0 30px;margin-top:20px;background:linear-gradient(180deg,transparent,rgba(109,91,255,.05))}
.footer__inner{display:grid;grid-template-columns:1.3fr 2fr;gap:40px}
.footer__tag{color:var(--muted);margin-top:14px;max-width:280px}
.footer__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer__cols h4{font-size:13px;color:var(--faint);text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;font-family:"JetBrains Mono"}
.footer__cols a{display:block;color:var(--muted);font-size:14.5px;padding:5px 0}
.footer__cols a:hover{color:var(--ink)}
.footer__bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:40px;padding-top:24px;color:var(--faint);font-size:13px;flex-wrap:wrap;gap:10px}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.bento .card.reveal,.work .work-card.reveal{transition-delay:calc(var(--i,0)*55ms)}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.marquee__track{animation:none}}

/* responsive */
@media (max-width:980px){
  .hero__inner,.why,.contact,.footer__inner,.legacy-wrap{grid-template-columns:1fr}
  .hero__visual{order:-1;max-width:380px;margin:0 auto}
  .bento{grid-template-columns:repeat(2,1fr)}
  .card,.card--lg{grid-column:span 1}
  .work{grid-template-columns:repeat(2,1fr)}
  .work-card--feat{grid-column:span 2}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .nav__links{display:none}.nav__burger{display:flex}
  .nav.is-open .nav__mobile{display:flex}
  .nav.is-open .nav__burger span:first-child{transform:translateY(3.5px) rotate(45deg)}
  .nav.is-open .nav__burger span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
  .hero{padding-top:118px}
  .bento,.steps,.work,.field-row,.footer__cols{grid-template-columns:1fr}
  .work-card,.work-card--feat{grid-column:span 1}
  .contact__form{padding:22px}
}