/* usaker polish layer v1: additive, motion-safe */
a.tag{font-size:14px;padding:7px 14px;margin:3px;text-decoration:none;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,color .25s ease;position:relative}
a.tag:hover,a.tag:focus-visible{transform:translateY(-2px);border-color:var(--brand);color:var(--brand);box-shadow:0 6px 18px -8px var(--brand)}
.sec-tight .tags{gap:8px;margin-top:4px}
.card.glow{transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.card.glow:hover{transform:translateY(-4px);box-shadow:0 18px 40px -22px rgba(79,70,229,.55)}
.ticks li{animation:xin .6s cubic-bezier(.2,.8,.2,1) both}
.ticks li:nth-child(2){animation-delay:.05s}.ticks li:nth-child(3){animation-delay:.1s}.ticks li:nth-child(4){animation-delay:.15s}.ticks li:nth-child(5){animation-delay:.2s}.ticks li:nth-child(6){animation-delay:.25s}.ticks li:nth-child(7){animation-delay:.3s}
.steps li{transition:transform .3s ease}
.steps li:hover{transform:translateY(-3px)}
.faq details summary{transition:color .2s ease}
.faq details[open] summary{color:var(--brand)}
.faq details[open] p{animation:xfade .35s ease both}
.prose table tbody tr{transition:background .2s ease}
.prose table tbody tr:hover{background:var(--brand-soft)}
.prose h2{scroll-margin-top:96px}
.post.glow .thumb img{transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.post.glow:hover .thumb img{transform:scale(1.04)}
.phead h1,.art-head h1{animation:xup .7s cubic-bezier(.2,.8,.2,1) both}
.phead p,.art-head .art-meta{animation:xup .7s .08s cubic-bezier(.2,.8,.2,1) both}
.hero-cta{animation:xup .7s .16s cubic-bezier(.2,.8,.2,1) both}
.btn{transition:transform .2s ease,box-shadow .25s ease,filter .25s ease}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0) scale(.98)}
.nmlink a{opacity:.9}
@keyframes xin{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:none}}
[dir=ltr] .ticks li{animation-name:xinl}
@keyframes xinl{from{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:none}}
@keyframes xup{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes xfade{from{opacity:0}to{opacity:1}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media (max-width:640px){.prose table{min-width:0;font-size:14.5px}.prose td,.prose th{word-break:normal;overflow-wrap:break-word}.prose td:first-child{min-width:96px}}
/* v2: premium polish */
.phead h1{background:linear-gradient(110deg,var(--ink) 0%,var(--ink) 55%,var(--brand) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.card.glow{position:relative;overflow:hidden}
.card.glow::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:inline-start;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.card.glow:hover::before{transform:scaleX(1)}
.card.glow h3{letter-spacing:-.01em}
.sec-head h2{letter-spacing:-.02em}
.cols .card.glow p{line-height:1.75}
.steps li h3{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.faq details{transition:border-color .25s ease,box-shadow .25s ease}
.faq details:hover{border-color:var(--line-2);box-shadow:0 10px 30px -24px rgba(79,70,229,.6)}
.svc-hero img{border-radius:22px;box-shadow:0 30px 70px -35px rgba(30,27,75,.45);animation:xfloat 7s ease-in-out infinite}
@keyframes xfloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.btn-primary{background-size:200% 100%;transition:background-position .5s ease,transform .2s ease,box-shadow .25s ease}
.btn-primary:hover{background-position:100% 0;box-shadow:0 14px 30px -14px rgba(79,70,229,.7)}
.prose blockquote{box-shadow:inset 0 0 0 1px var(--line)}
.prose h2{position:relative}
.prose h2::after{content:"";display:block;width:48px;height:3px;margin-top:10px;border-radius:3px;background:var(--grad)}
.art-cover img{transition:transform 1.2s cubic-bezier(.2,.8,.2,1)}
.art-cover:hover img{transform:scale(1.02)}
::selection{background:var(--brand);color:#fff}
@media (prefers-reduced-motion:reduce){.svc-hero img{animation:none}}
/* v3: header & footer */
.hdr::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:var(--grad);opacity:.9}
.hdr.scrolled{box-shadow:0 10px 30px -20px rgba(30,27,75,.35)}
.hdr .logo{transition:transform .3s ease}
.hdr .logo:hover{transform:translateY(-1px) scale(1.02)}
.nav a{position:relative;transition:color .25s ease}
.nav a::after{content:"";position:absolute;inset-inline:14px;bottom:5px;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transition:transform .3s cubic-bezier(.2,.8,.2,1)}
.nav a:hover::after,.nav a[aria-current=page]::after,.nav a.on::after{transform:scaleX(1)}
.nav a:hover{color:var(--brand)}
.hdr .btn-cta{position:relative;overflow:hidden;box-shadow:0 10px 24px -12px rgba(79,70,229,.8)}
.hdr .btn-cta::after{content:"";position:absolute;top:0;bottom:0;width:40%;inset-inline-start:-60%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);animation:xshine 4.5s ease-in-out infinite}
@keyframes xshine{0%,70%{inset-inline-start:-60%}100%{inset-inline-start:130%}}
.icon-btn{transition:transform .2s ease,border-color .2s ease,color .2s ease}
.icon-btn:hover{transform:translateY(-1px);border-color:var(--brand);color:var(--brand)}
.ftr-cta{margin-top:96px}
.ftr-cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding:34px 38px;border-radius:26px;background:var(--grad);color:#fff;box-shadow:0 30px 60px -36px rgba(79,70,229,.8);position:relative;overflow:hidden}
.ftr-cta .wrap::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;inset-inline-end:-140px;top:-220px;background:radial-gradient(circle,rgba(255,255,255,.25),transparent 65%)}
.ftr-cta h2{color:#fff;margin:0 0 6px;font-size:clamp(22px,2.6vw,30px)}
.ftr-cta p{margin:0;color:rgba(255,255,255,.88)}
.ftr-cta .acts{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:1}
.ftr-cta .acts a{display:inline-flex;align-items:center;min-height:46px;padding:0 20px;border-radius:999px;font-weight:700;text-decoration:none;background:#fff;color:#312e81;transition:transform .2s ease}
.ftr-cta .acts a.ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.45)}
.ftr-cta .acts a:hover{transform:translateY(-2px)}
.ftr-cta+.ftr{margin-top:56px}
.ftr{background:radial-gradient(900px 300px at 85% 0%,var(--brand-soft),transparent 70%),var(--bg-2);border-top:0}
.ftr::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:var(--grad);opacity:.6}
.ftr h2{position:relative;padding-bottom:10px;font-size:15.5px}
.ftr h2::after{content:"";position:absolute;inset-inline-start:0;bottom:0;width:26px;height:2px;border-radius:2px;background:var(--grad)}
.ftr ul a{display:inline-block;transition:transform .2s ease,color .2s ease}
.ftr ul a:hover{transform:translateX(-3px)}
[dir=ltr] .ftr ul a:hover{transform:translateX(3px)}
@media (min-width:981px){.ftr-grid{grid-template-columns:1.3fr repeat(4,1fr)}}
.ftr-mk li a{font-size:14.5px}
@media (max-width:640px){.ftr-cta .wrap{padding:26px 22px;border-radius:20px}}
/* v4: global-brand polish */
.topbar{position:relative;z-index:51;font-size:13px;color:var(--muted);background:color-mix(in srgb,var(--bg-2) 85%,transparent);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:38px;flex-wrap:wrap}
.topbar a{color:var(--ink-2);text-decoration:none;transition:color .2s}
.topbar a:hover{color:var(--brand)}
.topbar .tb-l,.topbar .tb-r{display:flex;align-items:center;gap:18px}
.topbar .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#10b981;margin-inline-end:6px;box-shadow:0 0 0 4px rgba(16,185,129,.15)}
.topbar .ltr{direction:ltr;unicode-bidi:isolate}
@media (max-width:760px){.topbar{display:none}}
/* footer signature */
.ftr-sig{position:relative;margin:44px 0 0;display:flex;justify-content:center}
.ftr-sig a{display:flex;align-items:center;gap:16px;padding:16px 22px 16px 16px;border-radius:22px;text-decoration:none;color:var(--ink);background:linear-gradient(var(--bg),var(--bg)) padding-box,var(--grad) border-box;border:1.5px solid transparent;box-shadow:0 24px 50px -30px rgba(79,70,229,.6);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s}
[dir=rtl] .ftr-sig a{padding:16px 16px 16px 22px}
.ftr-sig a:hover{transform:translateY(-3px);box-shadow:0 30px 60px -28px rgba(79,70,229,.75)}
.ftr-sig .mk{flex:none;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;background:var(--grad);color:#fff;font:800 24px/1 var(--f);letter-spacing:-.04em;box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.ftr-sig small{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.02em}
.ftr-sig b{display:block;font-size:16.5px;margin-top:2px}
.ftr-sig .url{display:inline-flex;align-items:center;gap:6px;margin-top:6px;font-size:14px;font-weight:700;direction:ltr;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ftr-sig .arr{flex:none;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);color:var(--brand);transition:transform .3s}
.ftr-sig a:hover .arr{transform:translateX(4px)}
[dir=rtl] .ftr-sig a:hover .arr{transform:translateX(-4px) scaleX(-1)}
[dir=rtl] .ftr-sig .arr{transform:scaleX(-1)}
/* article reading experience */
.prose{font-size:17.5px;line-height:1.95}
.prose>p:first-child{font-size:1.12em;color:var(--ink)}
.prose h2{margin-top:2.2em;scroll-margin-top:110px}
.prose h3{margin-top:1.6em;color:var(--ink)}
.prose ul li::marker,.prose ol li::marker{color:var(--brand);font-weight:700}
.prose blockquote{border-inline-start:0;background:linear-gradient(var(--brand-soft),var(--brand-soft)) padding-box,var(--grad) border-box;border:1px solid transparent;border-radius:18px;padding:20px 24px}
.prose .table-wrap{border-radius:16px;box-shadow:0 18px 40px -32px rgba(30,27,75,.4)}
.prose table thead th{background:var(--brand-soft);font-weight:700}
.prose table tbody tr:nth-child(even){background:color-mix(in srgb,var(--brand-soft) 45%,transparent)}
.prose a{text-decoration-thickness:1.5px;text-underline-offset:4px}
.author{border-radius:22px;padding:22px;background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--grad) border-box;border:1px solid transparent}
.author i{background:var(--grad)!important;color:#fff!important}
.share a{border-radius:999px;transition:transform .2s,border-color .2s,color .2s}
.share a:hover{transform:translateY(-2px);border-color:var(--brand);color:var(--brand)}
.toc ol a{transition:color .2s,padding .2s}
.toc ol a:hover{color:var(--brand);padding-inline-start:4px}
.art-cover img{border-radius:24px;box-shadow:0 40px 80px -40px rgba(30,27,75,.5)}
.art-meta li a{font-weight:700}
.post.glow{border-radius:22px;overflow:hidden;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s}
.post.glow:hover{transform:translateY(-6px);box-shadow:0 30px 60px -36px rgba(79,70,229,.6)}
.post-body h3{transition:color .2s}
.post.glow:hover .post-body h3{color:var(--brand)}
.post-cat{background:var(--brand-soft);padding:3px 10px;border-radius:999px;font-size:12px}
/* page sections */
.sec-tight{padding-block:clamp(48px,6vw,84px)}
.sec-head h2{font-size:clamp(26px,3.2vw,38px)}
.card.glow{border-radius:22px;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(6px)}
.phead{padding-block:clamp(56px,8vw,110px) clamp(40px,6vw,80px)}
/* v5: app card, credit, motion (transform/opacity only) */
.ftr-app{position:relative;margin:44px 0 0;display:flex;justify-content:center}
.ftr-app a{position:relative;overflow:hidden;display:flex;align-items:center;gap:16px;padding:14px 22px 14px 14px;border-radius:20px;text-decoration:none;color:#fff;background:linear-gradient(135deg,#0b0a24,#1e1b4b 60%,#312e81);box-shadow:0 26px 50px -28px rgba(30,27,75,.85);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s;animation:xappin 6s ease-in-out infinite}
[dir=rtl] .ftr-app a{padding:14px 14px 14px 22px}
.ftr-app a::after{content:"";position:absolute;top:0;bottom:0;width:35%;inset-inline-start:-50%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.18),transparent);animation:xshine 5s ease-in-out infinite}
.ftr-app a:hover{transform:translateY(-3px) scale(1.01);box-shadow:0 32px 60px -26px rgba(49,46,129,.95)}
.ftr-app .ic{flex:none;width:50px;height:50px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#22c55e,#06b6d4 50%,#6366f1);animation:xbob 3.2s ease-in-out infinite}
.ftr-app small{display:block;font-size:12px;opacity:.75;letter-spacing:.02em}
.ftr-app b{display:block;font-size:16px;margin-top:2px}
.ftr-app .gp{display:inline-flex;align-items:center;gap:6px;margin-top:6px;padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.12);font-size:12.5px;font-weight:700;direction:ltr}
.ftr-app .st{color:#facc15;letter-spacing:1px}
@keyframes xbob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@keyframes xappin{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}
.ftr-credit{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.ftr-credit a{font-weight:700;text-decoration:none;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200% 100%;animation:xgrad 6s linear infinite}
.ftr-credit .m{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:6px;background:var(--grad);color:#fff;font:800 11px/1 var(--f)}
@keyframes xgrad{0%{background-position:0 0}100%{background-position:200% 0}}
.ftr{content-visibility:auto;contain-intrinsic-size:auto 900px}
/* reveal polish for generated sections */
.sec-head.rv,.card.rv,.post.rv{will-change:auto}
.phead .crumbs,.art-head .crumbs{animation:xup .6s cubic-bezier(.2,.8,.2,1) both}
.hdr .logo svg{transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.hdr .logo:hover svg{transform:rotate(-6deg) scale(1.05)}
.btn-wa{transition:transform .2s ease,box-shadow .25s ease}
.btn-wa:hover{transform:translateY(-2px);box-shadow:0 14px 30px -14px rgba(16,185,129,.7)}
@media (prefers-reduced-motion:reduce){.ftr-app a,.ftr-app .ic,.ftr-credit a,.ftr-app a::after{animation:none!important}}
.msk-note{margin:14px 0 0;font-size:14px;color:var(--muted)}.msk-note a{font-weight:700;color:var(--brand)}
/* portfolio */
.wk-f{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.wk-f input{position:absolute;opacity:0;pointer-events:none}
.wk-f label{cursor:pointer;padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-weight:700;font-size:14px;transition:all .25s}
.wk-f label:hover{border-color:var(--brand);color:var(--brand)}
.wk-f input:checked+label{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 12px 24px -14px rgba(79,70,229,.8)}
.wk-f input:focus-visible+label{outline:2px solid var(--brand);outline-offset:2px}
.wk-g{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.wk-c{border-radius:22px;overflow:hidden;background:var(--surface);border:1px solid var(--line);display:flex;flex-direction:column;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s}
.wk-c:hover{transform:translateY(-6px);box-shadow:0 30px 60px -36px rgba(79,70,229,.6)}
.wk-i{position:relative;aspect-ratio:40/21;overflow:hidden;background:var(--bg-2)}
.wk-i img{width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.wk-c:hover .wk-i img{transform:scale(1.05)}
.wk-mock{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(400px 200px at 80% 0%,rgba(168,85,247,.35),transparent 60%),linear-gradient(135deg,#0b0a24,#1e1b4b)}
.wk-mock span{direction:ltr;color:#fff;font:700 22px/1 var(--f);padding:12px 18px;border-radius:14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18)}
.wk-t{position:absolute;inset-block-start:12px;inset-inline-start:12px;padding:5px 12px;border-radius:999px;background:rgba(11,10,36,.75);color:#fff;font-size:12px;font-weight:700;backdrop-filter:blur(6px)}
.wk-b{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.wk-b h3{margin:0;font-size:18px}
.wk-b p{margin:0;color:var(--muted);line-height:1.75}
.wk-go{margin-top:auto;align-self:flex-start;display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--brand);text-decoration:none}
.wk-go::after{content:"↗";transition:transform .25s}
.wk-go:hover::after{transform:translate(2px,-2px)}
.wk-go.off{color:var(--muted)}.wk-go.off::after{content:""}
.wk:has(#wk-app:checked) .wk-c:not(.t-app),.wk:has(#wk-web:checked) .wk-c:not(.t-web),.wk:has(#wk-sys:checked) .wk-c:not(.t-sys){display:none}