/* ============================================================
   TwinTech Studios — Design System
   Palette, type, and motif per brand brief.
   Edit tokens below to retheme the whole site.
   ============================================================ */
:root{
  --bg:#071019;
  --bg-2:#0C1622;
  --bg-3:#101d2c;
  --line:#1b2a3b;
  --line-soft:#142230;
  --text:#F7FAFC;
  --text-2:#A8B3C2;
  --text-3:#7c8b9e;
  --blue:#2563EB;
  --blue-bright:#3b82f6;
  --cyan:#22D3EE;
  --violet:#7C3AED;
  --ok:#34d399;
  --warn:#fbbf24;
  --radius:14px;
  --radius-sm:9px;
  --display:'Sora',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
  --body:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  --w:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--text);font-family:var(--body);font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
::selection{background:rgba(37,99,235,.45)}

/* Skip link */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--blue);color:#fff;padding:.6rem 1rem;border-radius:0 0 var(--radius-sm) 0;z-index:200}
.skip-link:focus{left:0}

/* Focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}

/* ---- Twin rail signature ---- */
.rails{display:inline-flex;gap:5px;vertical-align:middle;margin-right:10px}
.rails i{display:block;width:22px;height:3px;border-radius:2px}
.rails i:first-child{background:var(--blue-bright)}
.rails i:last-child{background:var(--cyan);width:14px}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);display:flex;align-items:center;margin-bottom:14px}

/* ---- Announcement bar ---- */
.announce{background:linear-gradient(90deg,rgba(37,99,235,.18),rgba(34,211,238,.12));border-bottom:1px solid var(--line-soft);font-size:.88rem;text-align:center;padding:.55rem 3rem .55rem 1rem;position:relative;color:var(--text-2)}
.announce a{color:var(--text);font-weight:600}
.announce button{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--text-3);font-size:1.05rem;cursor:pointer;padding:.2rem .5rem}
.announce button:hover{color:var(--text)}

/* ---- Header ---- */
header.site{position:sticky;top:0;z-index:100;background:rgba(7,16,25,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px;gap:1rem}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:700;font-size:1.13rem;color:var(--text);letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand .mark{display:flex;flex-direction:column;gap:4px}
.brand .mark i{display:block;height:4px;border-radius:2px}
.brand .mark i:first-child{width:26px;background:var(--blue-bright)}
.brand .mark i:last-child{width:17px;background:var(--cyan)}
.brand em{font-style:normal;color:var(--cyan)}
nav.primary{display:flex;align-items:center;gap:.2rem}
nav.primary>div{position:relative}
nav.primary a,nav.primary button.navlink{display:inline-block;padding:.55rem .78rem;color:var(--text-2);font-size:.95rem;font-weight:500;background:none;border:0;cursor:pointer;font-family:var(--body);border-radius:8px}
nav.primary a:hover,nav.primary button.navlink:hover{color:var(--text);text-decoration:none;background:var(--bg-2)}
nav.primary a[aria-current="page"]{color:var(--text)}
.menu-panel{position:absolute;top:calc(100% + 8px);left:0;min-width:540px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:14px;display:none;grid-template-columns:1fr 1fr;gap:2px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.menu-panel.open{display:grid}
.menu-panel a{display:block;padding:.6rem .7rem;border-radius:var(--radius-sm)}
.menu-panel a b{display:block;color:var(--text);font-weight:600;font-size:.92rem}
.menu-panel a span{display:block;color:var(--text-3);font-size:.8rem;line-height:1.4}
.menu-panel a:hover{background:var(--bg-3)}
.nav-cta{display:flex;align-items:center;gap:.6rem}
.btn{display:inline-block;font-family:var(--display);font-weight:600;font-size:.95rem;padding:.72rem 1.35rem;border-radius:10px;border:1px solid transparent;cursor:pointer;text-align:center;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(120deg,var(--blue),var(--blue-bright));color:#fff;box-shadow:0 8px 26px rgba(37,99,235,.35)}
.btn-primary:hover{box-shadow:0 10px 32px rgba(37,99,235,.5)}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-lg{padding:.95rem 1.8rem;font-size:1.02rem}
.hamburger{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:.5rem .65rem;cursor:pointer}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);margin:4px 0;border-radius:2px}
.mobile-menu{display:none;background:var(--bg-2);border-bottom:1px solid var(--line);padding:1rem 24px 1.4rem}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:.6rem 0;color:var(--text-2);font-weight:500;border-bottom:1px solid var(--line-soft)}
.mobile-menu a:hover{color:var(--text);text-decoration:none}
.mobile-menu .sub{padding-left:1rem;font-size:.92rem}
.mobile-menu .btn{margin-top:1rem;display:block}

/* ---- Hero ---- */
.hero{position:relative;padding:96px 0 84px;overflow:hidden}
.hero .grid-bg{position:absolute;inset:0;background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 80% 65% at 50% 0%,black 35%,transparent 78%);opacity:.5;pointer-events:none}
.hero .glow{position:absolute;width:640px;height:640px;border-radius:50%;filter:blur(130px);opacity:.16;pointer-events:none}
.hero .glow.b{background:var(--blue);top:-260px;left:-120px}
.hero .glow.c{background:var(--cyan);top:-200px;right:-180px;opacity:.1}
.hero-inner{position:relative;text-align:center;max-width:860px;margin:0 auto}
h1{font-family:var(--display);font-weight:700;letter-spacing:-.03em;font-size:clamp(2.3rem,5.4vw,3.9rem);line-height:1.09}
h1 .accent{background:linear-gradient(92deg,var(--blue-bright),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{color:var(--text-2);font-size:clamp(1.02rem,1.6vw,1.2rem);max-width:720px;margin:1.4rem auto 0;line-height:1.7}
.hero-cta{display:flex;gap:.9rem;justify-content:center;margin-top:2.1rem;flex-wrap:wrap}
.trust-line{margin-top:1.6rem;font-family:var(--mono);font-size:.78rem;color:var(--text-3);letter-spacing:.05em}
.service-strip{margin-top:2.6rem;font-family:var(--mono);font-size:.8rem;color:var(--text-2);letter-spacing:.08em;display:flex;flex-wrap:wrap;gap:.4rem 1rem;justify-content:center}
.service-strip b{color:var(--cyan);font-weight:400}

/* Hero twin panels */
.twin-panels{position:relative;max-width:960px;margin:3.6rem auto 0;display:grid;grid-template-columns:1fr 1fr;gap:18px;perspective:1200px}
.panel{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-align:left;box-shadow:0 30px 70px rgba(0,0,0,.45)}
.panel .bar{display:flex;gap:6px;margin-bottom:12px}
.panel .bar i{width:9px;height:9px;border-radius:50%;background:var(--line)}
.panel .bar i:first-child{background:var(--blue-bright)}
.panel .bar i:nth-child(2){background:var(--cyan)}
.panel pre{font-family:var(--mono);font-size:.74rem;line-height:1.75;color:var(--text-2);overflow:hidden;white-space:pre-wrap}
.panel pre .k{color:var(--cyan)}
.panel pre .s{color:#93c5fd}
.panel pre .c{color:var(--text-3)}
.panel.design .swatches{display:flex;gap:8px;margin-bottom:12px}
.panel.design .swatches i{width:34px;height:34px;border-radius:8px}
.panel.design .blocks div{border:1px dashed var(--line);border-radius:8px;margin-bottom:8px;padding:.5rem .7rem;font-family:var(--mono);font-size:.72rem;color:var(--text-3)}
.twin-link{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:52px;height:52px;border-radius:50%;background:var(--bg);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;z-index:2}
.twin-link svg{width:26px;height:26px}

/* ---- Sections ---- */
section.block{padding:78px 0}
section.block.alt{background:var(--bg-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
h2{font-family:var(--display);font-weight:700;letter-spacing:-.02em;font-size:clamp(1.6rem,3.2vw,2.35rem);line-height:1.18;max-width:760px}
h3{font-family:var(--display);font-weight:600;font-size:1.16rem;letter-spacing:-.01em}
.section-head{margin-bottom:2.4rem}
.section-head p{color:var(--text-2);max-width:680px;margin-top:.9rem}
.center{text-align:center}
.center h2,.center p{margin-left:auto;margin-right:auto}
.center .eyebrow{justify-content:center}

/* ---- Cards / grids ---- */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g5{grid-template-columns:repeat(5,1fr)}
.card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;position:relative;transition:border-color .18s ease,transform .18s ease;display:flex;flex-direction:column}
section.alt .card{background:var(--bg)}
.card::before{content:"";position:absolute;top:-1px;left:1.4rem;width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--blue-bright)}
.card::after{content:"";position:absolute;top:-1px;left:calc(1.4rem + 32px);width:15px;height:3px;border-radius:0 0 3px 3px;background:var(--cyan)}
a.card:hover{border-color:var(--blue);transform:translateY(-3px);text-decoration:none}
.card h3{color:var(--text);margin-bottom:.5rem}
.card p{color:var(--text-2);font-size:.94rem;flex:1}
.card .more{margin-top:1rem;font-family:var(--mono);font-size:.76rem;color:var(--cyan);letter-spacing:.06em}
.card .icon{width:42px;height:42px;border-radius:10px;background:var(--bg-3);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--cyan);font-family:var(--mono);font-size:.85rem}

/* value / plain cards without top rails */
.card.plain::before,.card.plain::after{display:none}

/* ---- Process ---- */
.process{counter-reset:step}
.process .card b.step{font-family:var(--mono);color:var(--blue-bright);font-size:.78rem;letter-spacing:.1em;display:block;margin-bottom:.55rem}

/* ---- Work / case cards ---- */
.work-card{display:grid;grid-template-columns:1.15fr 1fr;gap:0;overflow:hidden;padding:0}
.work-card .shot{background:linear-gradient(140deg,var(--bg-3),var(--bg-2));min-height:260px;border-right:1px solid var(--line);display:flex;align-items:center;justify-content:center;position:relative}
.work-card .shot .ph{font-family:var(--mono);font-size:.75rem;color:var(--text-3);border:1px dashed var(--line);padding:.6rem 1rem;border-radius:8px}
.work-card .meta{padding:1.6rem}
.tag{display:inline-block;font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);border:1px solid var(--line);border-radius:99px;padding:.22rem .7rem;margin:0 .35rem .5rem 0;background:var(--bg-3)}
.tag.status{color:var(--warn);border-color:rgba(251,191,36,.3)}
.tag.live{color:var(--ok);border-color:rgba(52,211,153,.3)}

/* ---- Media / tier ladder ---- */
.tier-ladder{display:flex;flex-wrap:wrap;gap:6px;margin-top:1.4rem}
.tier-ladder span{font-family:var(--mono);font-size:.72rem;padding:.3rem .55rem;border-radius:6px;border:1px solid var(--line);color:var(--text-2);background:var(--bg-2)}
.tier-ladder span.s{color:#071019;background:linear-gradient(90deg,var(--cyan),var(--blue-bright));border:0;font-weight:700}
.tier-ladder span.enough{color:#fda4af;border-color:rgba(253,164,175,.35)}

/* ---- Lists ---- */
ul.checks{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem 1.4rem}
ul.checks li{color:var(--text-2);font-size:.95rem;padding-left:1.5rem;position:relative}
ul.checks li::before{content:"";position:absolute;left:0;top:.52em;width:12px;height:2.5px;background:var(--blue-bright);border-radius:2px}
ul.checks li::after{content:"";position:absolute;left:0;top:calc(.52em + 5px);width:7px;height:2.5px;background:var(--cyan);border-radius:2px}
.prose{max-width:760px}
.prose p{color:var(--text-2);margin-bottom:1.05rem}
.prose h2{margin:2.2rem 0 .9rem}
.prose h3{margin:1.8rem 0 .6rem;color:var(--text)}
.prose ul,.prose ol{color:var(--text-2);margin:0 0 1.05rem 1.3rem}
.prose li{margin-bottom:.35rem}
.prose strong{color:var(--text)}
.note{border:1px solid var(--line);border-left:3px solid var(--warn);background:var(--bg-2);border-radius:var(--radius-sm);padding:.9rem 1.1rem;color:var(--text-2);font-size:.92rem;margin:1.4rem 0}
.note.info{border-left-color:var(--cyan)}

/* ---- FAQ ---- */
details.faq{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-2);margin-bottom:.7rem}
details.faq summary{cursor:pointer;padding:1rem 1.2rem;font-weight:600;font-family:var(--display);font-size:.98rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-family:var(--mono);color:var(--cyan);font-size:1.1rem;flex-shrink:0}
details.faq[open] summary::after{content:"–"}
details.faq .a{padding:0 1.2rem 1.1rem;color:var(--text-2);font-size:.94rem}

/* ---- Forms ---- */
form .field{margin-bottom:1.15rem}
label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.4rem}
label .req{color:var(--cyan)}
input,select,textarea{width:100%;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--text);padding:.75rem .9rem;font-family:var(--body);font-size:.95rem}
input:focus,select:focus,textarea:focus{border-color:var(--blue)}
textarea{min-height:130px;resize:vertical}
.field .err{display:none;color:#fda4af;font-size:.82rem;margin-top:.3rem}
.field.invalid .err{display:block}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#f87171}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 1.2rem}
.check-row{display:flex;gap:.7rem;align-items:flex-start}
.check-row input{width:auto;margin-top:.3rem}
.check-row label{font-weight:400;color:var(--text-2);font-size:.88rem;margin:0}
.steps-bar{display:flex;gap:8px;margin-bottom:1.8rem}
.steps-bar span{flex:1;height:4px;border-radius:2px;background:var(--line)}
.steps-bar span.on{background:linear-gradient(90deg,var(--blue-bright),var(--cyan))}
.form-step{display:none}
.form-step.on{display:block}
.form-nav{display:flex;justify-content:space-between;margin-top:1.6rem;gap:1rem}
.form-msg{display:none;border-radius:var(--radius-sm);padding:1rem 1.2rem;margin-top:1.2rem;font-size:.93rem}
.form-msg.ok{display:block;border:1px solid rgba(52,211,153,.4);color:var(--ok);background:rgba(52,211,153,.06)}
.form-msg.bad{display:block;border:1px solid rgba(248,113,113,.4);color:#fda4af;background:rgba(248,113,113,.06)}

/* ---- Founder cards ---- */
.founder{display:grid;grid-template-columns:200px 1fr;gap:1.6rem;align-items:start}
.avatar-ph{aspect-ratio:4/5;border-radius:var(--radius);background:linear-gradient(155deg,var(--bg-3),var(--bg-2));border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:.72rem;color:var(--text-3);text-align:center;padding:1rem}

/* ---- Timeline ---- */
.timeline{border-left:2px solid var(--line);margin-left:8px;padding-left:1.6rem}
.timeline .t-item{position:relative;margin-bottom:1.5rem}
.timeline .t-item::before{content:"";position:absolute;left:calc(-1.6rem - 7px);top:.45em;width:12px;height:12px;border-radius:50%;background:var(--bg);border:2.5px solid var(--blue-bright)}
.timeline .t-item:nth-child(even)::before{border-color:var(--cyan)}
.timeline b{font-family:var(--mono);font-size:.76rem;color:var(--cyan);letter-spacing:.08em;display:block;margin-bottom:.2rem}
.timeline p{color:var(--text-2);font-size:.95rem}

/* ---- CTA band ---- */
.cta-band{border:1px solid var(--line);border-radius:20px;background:radial-gradient(120% 160% at 15% 0%,rgba(37,99,235,.2),transparent 55%),radial-gradient(110% 150% at 90% 100%,rgba(124,58,237,.16),transparent 55%),var(--bg-2);padding:3.4rem 2.4rem;text-align:center;position:relative;overflow:hidden}
.cta-band h2{margin:0 auto}
.cta-band p{color:var(--text-2);max-width:640px;margin:1rem auto 1.8rem}
.cta-band .hero-cta{margin-top:0}

/* ---- Video cards ---- */
.video-ph{aspect-ratio:16/9;border-radius:var(--radius-sm);background:linear-gradient(140deg,var(--bg-3),var(--bg-2));border:1px solid var(--line);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;position:relative}
.video-ph .play{width:52px;height:52px;border-radius:50%;background:rgba(37,99,235,.85);display:flex;align-items:center;justify-content:center}
.video-ph .play::after{content:"";border-style:solid;border-width:9px 0 9px 15px;border-color:transparent transparent transparent #fff;margin-left:3px}

/* ---- Breadcrumbs ---- */
.crumbs{font-family:var(--mono);font-size:.75rem;color:var(--text-3);padding:1.2rem 0 0;letter-spacing:.04em}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--cyan)}

/* ---- Page hero (interior) ---- */
.page-hero{padding:64px 0 52px;border-bottom:1px solid var(--line-soft);background:radial-gradient(90% 120% at 50% -20%,rgba(37,99,235,.14),transparent 60%)}
.page-hero .lede{margin:1.2rem 0 0;text-align:left}
.page-hero h1{font-size:clamp(2rem,4.4vw,3rem)}

/* ---- Footer ---- */
footer.site{border-top:1px solid var(--line-soft);background:var(--bg-2);padding:64px 0 32px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:2rem}
.foot-grid h4{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-3);margin-bottom:1rem}
.foot-grid a{display:block;color:var(--text-2);font-size:.9rem;padding:.24rem 0}
.foot-grid a:hover{color:var(--cyan);text-decoration:none}
.foot-desc{color:var(--text-2);font-size:.9rem;margin:1rem 0 1.2rem;max-width:320px}
.foot-contact{font-size:.92rem;color:var(--text-2)}
.foot-contact a{display:inline;color:var(--text)}
.foot-bottom{border-top:1px solid var(--line-soft);margin-top:3rem;padding-top:1.6rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.82rem;color:var(--text-3)}
.foot-bottom a{color:var(--text-3);margin-right:1.1rem}
.foot-bottom a:hover{color:var(--cyan)}

/* ---- Reveal animation ---- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .btn,.card{transition:none}
}

/* ---- Responsive ---- */
@media (max-width:980px){
  .g4,.g5{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  nav.primary{display:none}
  .hamburger{display:block}
  .nav-cta .btn{display:none}
  .nav-cta .phone-mobile{display:inline-block}
  .work-card{grid-template-columns:1fr}
  .work-card .shot{border-right:0;border-bottom:1px solid var(--line)}
  .founder{grid-template-columns:1fr}
  .avatar-ph{max-width:240px}
}
@media (max-width:640px){
  .g2,.g3,.g4,.g5{grid-template-columns:1fr}
  ul.checks{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .twin-panels{grid-template-columns:1fr}
  .twin-link{display:none}
  section.block{padding:56px 0}
  .hero{padding:64px 0 56px}
  .foot-grid{grid-template-columns:1fr}
  .cta-band{padding:2.4rem 1.4rem}
}
.phone-mobile{display:none;font-family:var(--mono);font-size:.85rem;color:var(--cyan);border:1px solid var(--line);border-radius:8px;padding:.5rem .8rem}
@media (min-width:981px){.phone-mobile{display:none!important}}