/* ============================================================
   BUILD DESIGN SOLUTIONS - builddesign.solutions
   Design system: deep blue-black canvas, blueprint cyan lines,
   an amber marker for emphasis. Archivo (display, width axis),
   Instrument Sans (body), IBM Plex Mono (figures and labels).
   Self-hosted fonts, strict CSP, no inline JS.
   ============================================================ */

/* ---------- fonts ---------- */
@font-face{font-family:'Archivo';font-style:normal;font-weight:100 900;font-stretch:62% 125%;font-display:swap;src:url('assets/fonts/archivo-var.woff2') format('woff2')}
@font-face{font-family:'Instrument Sans';font-style:normal;font-weight:400 700;font-stretch:75% 100%;font-display:swap;src:url('assets/fonts/instrument-sans-var.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url('assets/fonts/plex-mono-400.woff2') format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url('assets/fonts/plex-mono-500.woff2') format('woff2')}

/* ---------- tokens ---------- */
:root{
  --canvas:#0b1118;
  --surface:#101925;
  --surface-2:#16222f;
  --surface-3:#1e2d3c;
  --ink:#eef3f8;
  --muted:#a9b6c4;
  --subtle:#7d8b9a;
  --brand:#2ec4ff;
  --brand-hot:#5fd3ff;
  --brand-soft:#8fdfff;
  --tint:#bfecff;
  --amber:#ffb224;
  --amber-soft:#ffd27a;
  --btn:#0b7fc4;          /* deep cyan for white-on-colour badges and step numbers (4.6:1 with white) */
  --btn-hov:#0a6ead;
  --on-brand:#06121c;     /* text on the bright cyan button */
  --line:rgba(190,220,255,.10);
  --line-strong:rgba(190,220,255,.20);
  --grid:rgba(46,196,255,.07);
  --grad:linear-gradient(95deg,#5fd3ff 0%,#bfecff 52%,#ffb224 100%);
  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-xl:22px;
  --display:'Archivo',system-ui,sans-serif;
  --body:'Instrument Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular','Cascadia Mono',Menlo,Consolas,monospace;
  --shadow:0 24px 60px rgba(0,0,0,.5);
  --glow:0 8px 32px rgba(46,196,255,.28);
  --head-bg:rgba(11,17,24,.78);
  color-scheme:dark;
}
:root[data-theme="light"]{
  --canvas:#edf1f5; --surface:#ffffff; --surface-2:#f3f6f9; --surface-3:#e6ecf2;
  --ink:#0f1720; --muted:#4f5f70; --subtle:#73828f;
  --brand:#0a8fd6; --brand-hot:#0b7fc4; --brand-soft:#0866a2; --tint:#0a4d78;
  --amber:#b46d00; --amber-soft:#8a5300;
  --btn:#0b7fc4; --btn-hov:#0a6ead; --on-brand:#ffffff;
  --line:rgba(15,30,50,.12); --line-strong:rgba(15,30,50,.22); --grid:rgba(10,143,214,.10);
  --grad:linear-gradient(95deg,#0a8fd6 0%,#0b5f9e 55%,#b46d00 100%);
  --shadow:0 24px 60px rgba(20,40,60,.16); --glow:0 8px 32px rgba(10,143,214,.22);
  --head-bg:rgba(237,241,245,.82);
  color-scheme:light;
}

/* ---------- base ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:92px}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-smooth [data-lenis-prevent]{overscroll-behavior:contain}
.lenis.lenis-stopped{overflow:hidden}
.lenis.lenis-smooth iframe{pointer-events:none}
body{font-family:var(--body);font-size:16.5px;line-height:1.62;color:var(--ink);background:var(--canvas);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
::selection{background:var(--brand);color:var(--on-brand)}
a{color:var(--ink);text-decoration:none}
img,svg,video{max-width:100%;vertical-align:middle}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--btn);color:#fff;font-weight:700;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.shell{max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:104px 0;position:relative}
.sec.tight{padding:72px 0}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* ---------- header ---------- */
.site-head{position:fixed;inset:0 0 auto 0;z-index:100;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);background:var(--head-bg);border-bottom:1px solid var(--line);transition:transform .35s ease,background .25s}
.site-head.is-hidden{transform:translateY(-100%)}
.site-head .bar{display:flex;align-items:center;gap:22px;height:68px}
.brand-lock{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--ink)}
.brand-lock .bmark{width:36px;height:36px;flex:none;transition:transform .35s cubic-bezier(.2,.8,.2,1)}
.brand-lock:hover .bmark{transform:translateY(-2px) rotate(-6deg)}
.bword{display:grid;line-height:1.02}
.bword b{font-family:var(--display);font-weight:700;font-size:1.02rem;letter-spacing:-.012em;font-stretch:104%}
.bword span{font-family:var(--mono);font-weight:500;font-size:.6rem;letter-spacing:.3em;text-transform:uppercase;color:var(--brand-soft);margin-top:3px}
.brand-lock.lg .bmark{width:46px;height:46px}
.brand-lock.lg .bword b{font-size:1.3rem}
.brand-lock.lg .bword span{font-size:.7rem}
.nav{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav a{color:var(--muted);font-size:.92rem;font-weight:500;transition:color .18s;white-space:nowrap;position:relative}
.nav a:not(.btn)::after{content:'';position:absolute;left:0;right:100%;bottom:-6px;height:1px;background:var(--brand);transition:right .22s ease}
.nav a:not(.btn):hover::after,.nav a[aria-current="page"]::after{right:0}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}
.nav .nav-cta{color:var(--on-brand)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line-strong);border-radius:9px;width:42px;height:38px;cursor:pointer;position:relative}
.burger span,.burger span::before,.burger span::after{content:'';position:absolute;left:10px;right:10px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s}
.burger span{top:50%;margin-top:-1px}
.burger span::before{left:0;right:0;top:-6px}
.burger span::after{left:0;right:0;top:6px}
.nav-open .burger span{transform:rotate(45deg)}
.nav-open .burger span::before{transform:rotate(-90deg) translateX(-6px)}
.nav-open .burger span::after{opacity:0}
.theme-toggle{display:inline-grid;place-items:center;width:38px;height:38px;flex:none;border:1px solid var(--line-strong);border-radius:9px;background:none;color:var(--ink);cursor:pointer;transition:color .15s,border-color .15s}
.theme-toggle:hover{color:var(--brand-hot);border-color:var(--brand-hot)}
.tt-ic{display:block}
.tt-ic .ic-moon{display:none}
:root[data-theme="light"] .tt-ic .ic-moon{display:block}
:root[data-theme="light"] .tt-ic .ic-sun{display:none}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--body);font-weight:650;font-size:.95rem;border-radius:var(--r-sm);padding:12px 22px;border:1px solid transparent;cursor:pointer;transition:transform .18s,box-shadow .18s,border-color .18s,background .18s,color .18s;white-space:nowrap;line-height:1.2}
.btn-primary{background:var(--brand);color:var(--on-brand)}
.btn-primary:hover{background:var(--brand-hot);transform:translateY(-2px);box-shadow:var(--glow)}
:root[data-theme="light"] .btn-primary:hover{background:var(--brand-hot)}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--brand);transform:translateY(-2px)}
.btn-lg{padding:15px 28px;font-size:1.02rem}
.btn.btn-sm{padding:6px 10px;font-size:.8rem}
.btn .arr{transition:transform .18s;display:inline-block}
.btn:hover .arr{transform:translateX(3px)}
.btn:disabled{opacity:.6;cursor:default}

/* ---------- type helpers ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.74rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--amber)}
.eyebrow::before{content:'';width:22px;height:2px;background:var(--brand);flex:none}
h1,h2,h3,h4{font-family:var(--display);letter-spacing:-.022em;line-height:1.12;font-weight:700}
h2{font-size:clamp(1.85rem,3.4vw,2.6rem);letter-spacing:-.028em;text-wrap:balance}
h3{font-size:1.15rem}
.display{font-size:clamp(2.6rem,6vw,4.7rem);font-weight:760;letter-spacing:-.04em;line-height:1.0;font-stretch:103%;text-wrap:balance}
.lead{color:var(--muted);font-size:1.13rem;max-width:660px}
.grad-text,.grad-text div{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
/* SplitText lines clip the rising words; the gradient repeats per word because a clipped background cannot span the wrappers */
.split-line{overflow:hidden;padding-bottom:.06em;margin-bottom:-.06em}
.sec-head{margin-bottom:52px;display:grid;gap:16px}
.sec-head.center,.center{text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.center .lead{margin:0 auto}
.num-tag{font-family:var(--mono);font-size:.78rem;color:var(--subtle);letter-spacing:.08em}

/* ---------- blueprint grid helper ---------- */
.gridbg{position:relative;isolation:isolate}
.gridbg::before{content:'';position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:48px 48px;
  -webkit-mask:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 100%);mask:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 100%)}

/* ---------- home hero ---------- */
.hero{position:relative;padding:168px 0 80px;overflow:hidden}
.hero::before,.hero::after{content:'';position:absolute;border-radius:50%;filter:blur(130px);pointer-events:none;z-index:-1}
.hero::before{width:620px;height:620px;right:-200px;top:-220px;background:rgba(46,196,255,.14)}
.hero::after{width:460px;height:460px;left:-200px;bottom:-240px;background:rgba(255,178,36,.10)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
.hero-copy{display:grid;gap:24px;justify-items:start}
.hero-copy .sub{color:var(--muted);font-size:1.16rem;max-width:560px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;flex-wrap:wrap;gap:6px 10px;font-size:.85rem;color:var(--subtle);font-family:var(--mono)}
.hero-trust b{color:var(--muted);font-weight:500}
.hero-trust .d{color:var(--brand)}
.hero-beta{font-size:.96rem;color:var(--muted)}
.hero-beta a{color:var(--brand-soft);font-weight:600}
.hero-beta a:hover{color:var(--ink)}
.hero-iso{position:absolute;right:-6%;top:6%;width:min(62vw,900px);opacity:.42;pointer-events:none;z-index:-1}
.hero-iso path,.hero-iso line,.hero-iso polyline,.hero-iso polygon{fill:none;stroke:var(--brand);stroke-width:1;vector-effect:non-scaling-stroke;stroke-linejoin:round;stroke-linecap:round}
.hero-iso .site{stroke:var(--amber);stroke-dasharray:6 5}
.hero-iso .ground{stroke-opacity:.35}
.hero-iso .fill{fill:rgba(46,196,255,.06)}
.hero-iso .top{fill:rgba(46,196,255,.14)}
html.js:not(.no-motion) .hero-reveal{visibility:hidden}

/* browser frame around app screenshots */
.frame{position:relative;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r-lg);box-shadow:var(--shadow),0 0 0 1px rgba(46,196,255,.08);overflow:hidden}
.frame-head{display:flex;align-items:center;gap:8px;padding:11px 14px;border-bottom:1px solid var(--line);background:var(--surface-2)}
.frame-head .dot{width:9px;height:9px;border-radius:50%;background:var(--surface-3);border:1px solid var(--line-strong)}
.frame-head .url{margin-left:10px;font-family:var(--mono);font-size:.74rem;color:var(--subtle);background:var(--canvas);border:1px solid var(--line);border-radius:6px;padding:4px 10px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.frame-head .url b{color:var(--brand-soft);font-weight:500}
.frame img,.frame video{display:block;width:100%;height:auto;background:#0d151e}
.hero-shot{position:relative}
.hero-shot .frame{transform:perspective(1600px) rotateY(-6deg) rotateX(2deg);transform-origin:left center;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.hero-shot:hover .frame{transform:perspective(1600px) rotateY(-2deg) rotateX(0deg)}
.chip-float{position:absolute;display:grid;gap:2px;background:var(--surface);border:1px solid var(--line-strong);border-radius:10px;padding:10px 14px;box-shadow:var(--shadow);min-width:132px}
.chip-float .k{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--subtle)}
.chip-float .v{font-family:var(--display);font-weight:700;font-size:1.15rem;letter-spacing:-.02em}
.chip-float .v i{font-style:normal;color:var(--brand-soft);font-size:.8rem;font-family:var(--mono);margin-left:3px}
.chip-float.a{left:-34px;bottom:46px}
.chip-float.b{right:-22px;top:40px}
.chip-float.c{right:28px;bottom:-26px}
.chip-float.c .v{color:var(--amber-soft)}

/* ---------- ticker ---------- */
.ticker{overflow:hidden;border-block:1px solid var(--line);padding:16px 0;background:var(--surface);
  -webkit-mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.ticker-track{display:flex;gap:0;width:max-content;will-change:transform}
html.no-motion .ticker-track{animation:slide 48s linear infinite}
@keyframes slide{to{transform:translateX(-50%)}}
.ticker-track span{flex:0 0 auto;font-family:var(--mono);font-size:.82rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:0 26px;display:inline-flex;align-items:center;gap:26px}
.ticker-track span::after{content:'';width:6px;height:6px;background:var(--amber);transform:rotate(45deg);flex:none}

/* ---------- how it works: sticky media + steps ---------- */
.how{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.how-media{position:sticky;top:104px}
.how-media .frame{aspect-ratio:16/10}
.how-media .frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top left;opacity:0;transition:opacity .5s ease}
.how-media .frame .fbody{position:relative;height:calc(100% - 41px)}
.how-media .frame img.on{opacity:1}
.how-steps{display:grid;gap:14px}
.how-step{position:relative;padding:26px 26px 26px 78px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);transition:border-color .3s,background .3s;cursor:default}
.how-step .n{position:absolute;left:24px;top:26px;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-family:var(--mono);font-weight:500;font-size:.9rem;color:var(--muted);border:1px solid var(--line-strong);transition:all .3s}
.how-step h3{font-size:1.12rem;margin-bottom:8px}
.how-step p{color:var(--muted);font-size:.95rem}
.how-step.on{border-color:rgba(46,196,255,.45);background:var(--surface-2)}
.how-step.on .n{background:var(--brand);color:var(--on-brand);border-color:var(--brand)}
.how-step .tip{display:none;margin-top:14px;border-radius:10px;overflow:hidden;border:1px solid var(--line-strong)}
.how-step .tip img{display:block;width:100%;height:auto}

/* ---------- gallery of views ---------- */
.views{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.view{display:grid;gap:12px;color:inherit}
.view .frame{overflow:hidden}
.view .frame img{transition:transform .8s cubic-bezier(.2,.8,.2,1)}
.view:hover .frame img{transform:scale(1.03)}
.view h3{font-size:1.08rem;display:flex;align-items:baseline;gap:12px}
.view h3 .num-tag{color:var(--amber)}
.view p{color:var(--muted);font-size:.94rem}

/* ---------- cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;display:grid;gap:12px;align-content:start;transition:transform .25s,border-color .25s,background .25s}
.card::after{content:'';position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);opacity:0;transition:opacity .25s;border-radius:var(--r-lg) var(--r-lg) 0 0}
.card:hover{border-color:var(--line-strong);background:var(--surface-2)}
.card:hover::after{opacity:1}
a.card:hover{transform:translateY(-4px)}
.card h3{font-size:1.1rem}
.card p{color:var(--muted);font-size:.94rem}
.card .more{font-size:.9rem;font-weight:600;color:var(--brand-soft);display:inline-flex;gap:6px;align-items:center}
.card .more .arr{display:inline-block;transition:transform .18s}
.card:hover .more .arr{transform:translateX(4px)}
.card .idx{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;color:var(--subtle)}
.card .ico{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--line-strong);color:var(--brand)}
.card .ico svg{width:22px;height:22px}

/* ---------- engineering tiles ---------- */
.eng-band{background:linear-gradient(180deg,var(--surface) 0%,var(--canvas) 100%);border-block:1px solid var(--line)}
.eng-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.eng{position:relative;background:var(--canvas);border:1px solid var(--line);border-radius:var(--r-md);padding:22px 22px 22px 22px;display:grid;gap:8px;align-content:start;transition:border-color .25s,transform .25s}
.eng:hover{border-color:rgba(46,196,255,.45);transform:translateY(-3px)}
.eng .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber)}
.eng h3{font-size:1.05rem}
.eng p{color:var(--muted);font-size:.9rem}
.eng-foot{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px;align-items:center}
.eng-foot .note{color:var(--subtle);font-size:.9rem;max-width:640px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;display:grid;gap:6px}
.stat .n{font-family:var(--display);font-weight:760;font-size:2.6rem;letter-spacing:-.04em;line-height:1;color:var(--ink)}
.stat .n i{font-style:normal;color:var(--brand);font-size:1.4rem;margin-left:2px}
.stat p{color:var(--muted);font-size:.9rem}

/* ---------- exports ---------- */
.exports{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.exports>div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;display:grid;gap:8px;align-content:start;position:relative}
.exports b{font-family:var(--mono);font-size:1.05rem;color:var(--brand-hot);letter-spacing:.04em}
.exports span{color:var(--muted);font-size:.93rem}

/* ---------- tutorial strip ---------- */
.tuts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.tut{display:grid;gap:10px;color:inherit;align-content:start}
.tut .thumb{position:relative;aspect-ratio:16/9;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line-strong);background:#0d151e}
.tut .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .7s cubic-bezier(.2,.8,.2,1)}
.tut:hover .thumb img{transform:scale(1.05)}
.tut .thumb::after{content:'';position:absolute;left:50%;top:50%;width:48px;height:48px;margin:-24px 0 0 -24px;border-radius:50%;background:rgba(11,17,24,.66) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M9 6.5v11l9-5.5z' fill='%23fff'/%3E%3C/svg%3E") center/26px no-repeat;border:2px solid rgba(255,255,255,.85);transition:transform .2s}
.tut:hover .thumb::after{transform:scale(1.1)}
.tut .dur{position:absolute;right:8px;bottom:8px;font-family:var(--mono);font-size:.72rem;background:rgba(11,17,24,.8);color:#fff;padding:2px 7px;border-radius:5px}
.tut h3{font-size:.98rem}
.tut p{color:var(--subtle);font-size:.84rem;font-family:var(--mono)}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center}
.split.rev{grid-template-columns:.9fr 1.1fr}
.split .copy{display:grid;gap:18px;justify-items:start}
.tick-list{list-style:none;display:grid;gap:10px;margin-top:16px}
.tick-list li{position:relative;padding-left:30px;color:var(--muted)}
.tick-list li::before{content:'';position:absolute;left:0;top:4px;width:18px;height:18px;border-radius:5px;background:rgba(46,196,255,.14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2l2.3 2.3 4.7-5' stroke='%235fd3ff' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") center/12px no-repeat}
.pricing-card{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r-lg);padding:28px;display:grid;gap:10px;align-content:start;box-shadow:var(--shadow);position:relative;overflow:hidden}
.pricing-card::before{content:'';position:absolute;inset:0 auto auto 0;width:100%;height:3px;background:var(--grad)}
.pricing-card .pc-title{font-size:1.05rem;margin:0 0 6px}
.pricing-card .tick-list{margin-top:6px}

/* ---------- CTA band ---------- */
.band{position:relative;border-radius:var(--r-xl);padding:1px;background:linear-gradient(135deg,rgba(46,196,255,.6),rgba(46,196,255,.08) 40%,rgba(255,178,36,.5))}
.band-inner{background:var(--surface);border-radius:calc(var(--r-xl) - 1px);padding:62px 48px;display:grid;gap:20px;justify-items:center;text-align:center;position:relative;overflow:hidden}
.band-inner::before{content:'';position:absolute;inset:0;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:40px 40px;-webkit-mask:radial-gradient(ellipse 70% 90% at 50% 50%,#000,transparent);mask:radial-gradient(ellipse 70% 90% at 50% 50%,#000,transparent);pointer-events:none}
.band-inner>*{position:relative}
.band-inner h2{max-width:680px}
.band-inner p{color:var(--muted);max-width:560px}

/* ---------- forms ---------- */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:34px;display:grid;gap:20px;position:relative}
.form-card h3{margin-bottom:4px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:grid;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:.86rem;font-weight:600;color:var(--ink)}
.field label .opt{color:var(--subtle);font-weight:400}
.field .fhint{font-size:.8rem;color:var(--subtle)}
.field input,.field select,.field textarea{width:100%;background:var(--canvas);border:1px solid var(--line-strong);border-radius:var(--r-sm);color:var(--ink);font:inherit;font-size:.95rem;padding:12px 14px;transition:border-color .18s,box-shadow .18s}
.field textarea{min-height:124px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(46,196,255,.16)}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a9b6c4' stroke-width='2' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.hp{position:absolute!important;left:-9999px!important;opacity:0!important;height:0!important;overflow:hidden!important}
.form-note{font-size:.83rem;color:var(--subtle)}
.form-note a{color:var(--brand-soft)}
.form-ok,.form-err{display:none;border-radius:var(--r-sm);padding:14px 16px;font-size:.93rem;font-weight:500}
.form-ok{background:rgba(61,220,151,.1);border:1px solid rgba(61,220,151,.35);color:#7fe6b6}
.form-err{background:rgba(255,107,107,.08);border:1px solid rgba(255,107,107,.3);color:#ff9b9b}
.form-ok.show,.form-err.show{display:block}
:root[data-theme="light"] .form-ok{background:rgba(31,122,77,.1);border-color:rgba(31,122,77,.35);color:#1f7a4d}
:root[data-theme="light"] .form-err{background:rgba(180,35,24,.08);border-color:rgba(180,35,24,.3);color:#b42318}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:10px;max-width:840px;margin:0 auto}
.faq-list details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:border-color .2s}
.faq-list details[open]{border-color:rgba(46,196,255,.35)}
.faq-list summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:16px;padding:19px 24px;font-family:var(--display);font-weight:600;font-size:1.02rem}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";margin-left:auto;font-size:1.4rem;font-weight:300;color:var(--brand-hot);transition:transform .2s;line-height:1;font-family:var(--mono)}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list .a{padding:0 24px 22px;color:var(--muted);font-size:.96rem;max-width:740px}
.faq-list .a a{color:var(--brand-soft);font-weight:500}

/* ---------- prose (legal, guide, articles) ---------- */
.prose{max-width:800px;margin:0 auto;display:grid;gap:18px}
.prose h2{font-size:1.4rem;margin-top:22px}
.prose h3{font-size:1.08rem;margin-top:8px}
.prose p,.prose li{color:var(--muted);font-size:.97rem}
.prose ul{padding-left:22px;display:grid;gap:8px}
.prose ol{padding-left:22px;display:grid;gap:8px}
.prose a{color:var(--brand-soft)}
.prose b{color:var(--ink);font-weight:600}
.prose .updated{font-size:.84rem;color:var(--subtle);font-family:var(--mono)}
.prose .callout{background:var(--surface);border:1px solid var(--line-strong);border-left:3px solid var(--brand);border-radius:10px;padding:14px 16px;color:var(--muted)}
.prose kbd{font-family:var(--mono);font-size:.82em;background:var(--surface-2);border:1px solid var(--line-strong);border-radius:5px;padding:1px 6px;color:var(--ink)}

/* ---------- breadcrumbs + page hero ---------- */
.crumbs{display:flex;gap:8px;align-items:center;font-size:.82rem;color:var(--subtle);flex-wrap:wrap;font-family:var(--mono)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.crumbs .sep{opacity:.5}
.page-hero{position:relative;padding:150px 0 56px;overflow:hidden}
.page-hero::before{content:'';position:absolute;width:520px;height:520px;border-radius:50%;filter:blur(130px);background:rgba(46,196,255,.10);right:-160px;top:-180px;pointer-events:none}
.page-hero::after{content:'';position:absolute;inset:0;z-index:-1;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:48px 48px;-webkit-mask:radial-gradient(ellipse 70% 80% at 30% 30%,#000 20%,transparent 100%);mask:radial-gradient(ellipse 70% 80% at 30% 30%,#000 20%,transparent 100%);pointer-events:none;opacity:.8}
.page-hero .inner{position:relative;display:grid;gap:18px;justify-items:start}
.page-hero h1{font-size:clamp(2.1rem,4.4vw,3.3rem);font-weight:740;letter-spacing:-.035em;text-wrap:balance}
.page-hero .lead{font-size:1.08rem}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);padding:64px 0 40px;margin-top:40px;background:var(--surface)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;margin-bottom:44px}
.foot .fh{font-family:var(--mono);font-size:.74rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--subtle);margin-bottom:14px}
.foot ul{list-style:none;display:grid;gap:9px}
.foot a{color:var(--muted);font-size:.92rem}
.foot a:hover{color:var(--ink)}
.foot .blurb{color:var(--muted);font-size:.92rem;max-width:340px;margin-top:14px}
.foot-legal{border-top:1px solid var(--line);padding-top:26px;display:flex;gap:18px;flex-wrap:wrap;align-items:center;font-size:.82rem;color:var(--subtle)}
.foot-legal .sp{margin-left:auto;display:flex;gap:18px}
.foot-legal a{color:var(--subtle)}
.foot-legal a:hover{color:var(--muted)}

/* ---------- 404 ---------- */
.err-hero{min-height:72vh;display:grid;place-items:center;text-align:center;padding:140px 0 80px}
.err-hero .code{font-family:var(--mono);font-weight:500;font-size:clamp(4rem,14vw,8rem);letter-spacing:-.04em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.err-hero .inner{display:grid;gap:18px;justify-items:center}

/* ---------- reveal (inner pages: IntersectionObserver in app.js) ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
html.no-motion .reveal{opacity:1;transform:none}
/* reveal (landing: GSAP batch on .rv; stays visible without JS or motion) */
html.js:not(.no-motion) .rv{opacity:0}

/* ---------- scrollbar ---------- */
::-webkit-scrollbar{width:11px}
::-webkit-scrollbar-thumb{background:var(--surface-3);border-radius:99px;border:3px solid var(--canvas)}
::-webkit-scrollbar-track{background:var(--canvas)}

/* ---------- responsive ---------- */
@media(max-width:1100px){
  .stats{grid-template-columns:repeat(3,1fr)}
  .eng-grid{grid-template-columns:repeat(2,1fr)}
  .tuts{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:1020px){
  .site-head .bar{gap:16px}
  .nav{gap:16px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .hero-grid,.split,.split.rev{grid-template-columns:1fr}
  .hero{padding-top:140px}
  .hero-shot .frame{transform:none}
  .hero-iso{opacity:.2;width:90vw;right:-30%}
  .how{grid-template-columns:1fr}
  .how-media{display:none}
  .how-step .tip{display:block}
  .foot-grid{grid-template-columns:1fr 1fr}
  .exports{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  .nav{position:fixed;inset:68px 0 auto 0;background:var(--canvas);flex-direction:column;align-items:stretch;gap:0;padding:10px 24px 26px;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:transform .28s ease;margin-left:0;max-height:calc(100vh - 68px);overflow:auto}
  .nav a{padding:13px 4px;font-size:1.05rem;border-bottom:1px solid var(--line)}
  .nav a:not(.btn)::after{display:none}
  .nav .nav-cta{margin-top:14px;text-align:center;border-bottom:0}
  .nav-open .nav{transform:none}
  .burger{display:block}
}
@media(max-width:760px){
  .shell{padding:0 18px}
  .grid-3,.grid-2,.grid-4,.views,.eng-grid,.exports,.tuts{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .form-grid{grid-template-columns:1fr}
  .sec{padding:68px 0}
  .sec.tight{padding:56px 0}
  .band-inner{padding:44px 24px}
  .form-card{padding:24px 18px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-legal{flex-direction:column;align-items:flex-start}
  .foot-legal .sp{margin-left:0}
  .chip-float{display:none}
  .hero{padding:124px 0 56px}
  .hero-copy .sub{font-size:1.05rem}
  .display{font-size:clamp(2.3rem,10vw,3.2rem)}
  .brand-lock .bmark{width:32px;height:32px}
  .bword b{font-size:.95rem}
  .stat .n{font-size:2.1rem}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal,.rv{opacity:1!important;transform:none!important}
}