/* Thiban Tech Solutions — thiban1.com
   Premium software-studio styling: white background, blue/teal gradients,
   strong typography, soft shadows, rounded cards. Mobile-first, responsive,
   accessible, and RTL-ready (Arabic). Portable static CSS — no build step. */

:root{
  --ink:#0b1f4d;
  --muted:#5e6b85;
  --primary:#165dff;
  --primary-2:#4f7cff;
  --cyan:#20c7d9;
  --soft:#f5f8ff;
  --soft-2:#f8fbff;
  --line:#e3eaf7;
  --white:#ffffff;
  --navy:#081d4b;
  --shadow-sm:0 8px 20px rgba(40,80,150,.07);
  --shadow-md:0 12px 30px rgba(37,73,135,.08);
  --shadow-lg:0 20px 50px rgba(20,55,120,.12);
  --radius:24px;
  --radius-sm:14px;
  --max:1180px;
  --grad-brand:linear-gradient(135deg,var(--cyan),var(--primary));
  --grad-btn:linear-gradient(135deg,var(--primary),var(--primary-2));
  --font:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,"Noto Sans Arabic",sans-serif;
  --font-ar:"Segoe UI","Noto Sans Arabic",Tahoma,"Geeza Pro",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:#fff;
  line-height:1.65;font-size:17px;min-height:100vh;display:flex;flex-direction:column;
}
html[dir="rtl"] body{font-family:var(--font-ar);line-height:1.9}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:none}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.15}
p{color:var(--muted);margin:0}
:focus-visible{outline:3px solid var(--primary-2);outline-offset:2px;border-radius:6px}

.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}
@media (max-width:560px){.container{width:min(100% - 24px,var(--max))}}
section{padding:78px 0}
@media (max-width:560px){section{padding:56px 0}}
.section-soft{background:var(--soft-2);border-top:1px solid #edf2fb;border-bottom:1px solid #edf2fb}
.center{text-align:center}
.muted{color:var(--muted)}
.lead{color:var(--muted);font-size:18px;line-height:1.75;max-width:640px}
.center .lead{margin-inline:auto}

/* language visibility (both languages ship in HTML; CSS shows the active one) */
html[data-lang="en"] [data-ar]{display:none}
html[data-lang="ar"] [data-en]{display:none}

/* skip link */
.skip{position:absolute;inset-inline-start:-999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:100;font-weight:700}
.skip:focus{inset-inline-start:0}

/* ---------------- header ---------------- */
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid rgba(227,234,247,.75)}
.nav{min-height:76px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.02em;font-size:19px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand img{width:40px;height:40px;border-radius:13px;box-shadow:0 10px 25px rgba(22,93,255,.22)}
.brand span{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-inline-start:auto;font-size:14.5px;font-weight:700}
.nav-links a{color:var(--ink);padding:27px 0 24px;border-bottom:3px solid transparent;white-space:nowrap}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--primary);border-bottom-color:var(--primary)}
.lang-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 15px;font-weight:800;color:var(--ink);cursor:pointer;font-size:14px}
.lang-btn:hover{border-color:var(--primary-2);color:var(--primary)}
.nav-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 11px;cursor:pointer;color:var(--ink);font-size:18px;line-height:1}
@media (max-width:920px){
  .nav-toggle{display:inline-flex;margin-inline-start:auto}
  .nav-links{display:none;position:absolute;inset-inline:0;top:76px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:6px 20px 14px;box-shadow:var(--shadow-md)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 0;border-bottom:1px solid var(--line)}
  .nav-links a:hover,.nav-links a[aria-current="page"]{border-bottom-color:var(--line)}
  .lang-btn{align-self:flex-start;margin-top:12px}
}

/* ---------------- buttons ---------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:12px;font-weight:800;border:1px solid transparent;transition:transform .2s ease,box-shadow .2s ease;cursor:pointer;font-size:15.5px}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn-primary{background:var(--grad-btn);color:#fff;box-shadow:0 14px 28px rgba(22,93,255,.24)}
.btn-secondary,.btn-ghost{background:#fff;border-color:#b8cbff;color:var(--primary)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px}
.center .btn-row{justify-content:center}

/* eyebrow pill */
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border-radius:999px;color:var(--primary);background:#eef4ff;font-size:13px;font-weight:800;margin-bottom:16px}

/* section head */
.section-head{margin-bottom:30px}
.section-head h2{font-size:clamp(28px,3.5vw,34px)}
.section-head p{margin-top:10px;max-width:680px;line-height:1.7}
.section-head.center{display:flex;flex-direction:column;align-items:center;text-align:center}
.section-head.center p{margin-inline:auto}

h1{font-size:clamp(40px,6vw,68px);line-height:1.03;letter-spacing:-.045em}
h2{font-size:clamp(26px,3.5vw,34px);letter-spacing:-.03em}
h3{font-size:22px}

/* ---------------- hero ---------------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid #edf2fb;
  background:
    radial-gradient(circle at 82% 28%,rgba(32,199,217,.18),transparent 26%),
    radial-gradient(circle at 66% 66%,rgba(22,93,255,.13),transparent 30%),
    linear-gradient(180deg,#fff,#f8fbff);}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:56px;padding:86px 0 92px}
.hero .lead{margin:22px 0 30px;font-size:18px}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr;padding:60px 0}}
@media (max-width:560px){.hero-grid{padding:44px 0 52px;gap:30px}}

/* device stage */
.device-stage{min-height:430px;position:relative;display:grid;place-items:center}
@media (max-width:920px){.device-stage{min-height:360px}}
@media (max-width:560px){.device-stage{min-height:320px}}
.glow{position:absolute;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(22,93,255,.20),rgba(32,199,217,.07) 55%,transparent 72%);filter:blur(2px)}
.laptop{width:min(520px,100%);position:relative;z-index:2;transform:perspective(1000px) rotateY(-7deg) rotateX(2deg)}
html[dir="rtl"] .laptop{transform:perspective(1000px) rotateY(7deg) rotateX(2deg)}
.screen{border:10px solid #1d2f5a;border-bottom-width:16px;background:#f7faff;border-radius:20px 20px 12px 12px;box-shadow:var(--shadow-lg);padding:18px;aspect-ratio:16/10}
.screen-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.mini-logo{width:70px;height:10px;border-radius:999px;background:#d7e3ff}
.dots{display:flex;gap:6px}
.dots i{display:block;width:8px;height:8px;border-radius:50%;background:#cfdbf5}
.dash{display:grid;grid-template-columns:.8fr 1.2fr;gap:14px;height:calc(100% - 30px)}
.panel{border-radius:14px;background:#fff;border:1px solid #e6edfa;box-shadow:var(--shadow-sm);padding:14px}
.bars{height:100%;display:flex;align-items:end;justify-content:space-around;gap:10px}
.bars span{width:18%;border-radius:8px 8px 3px 3px;background:linear-gradient(180deg,var(--cyan),var(--primary))}
.bars span:nth-child(1){height:36%}.bars span:nth-child(2){height:68%}.bars span:nth-child(3){height:48%}.bars span:nth-child(4){height:82%}
.rowline{height:22px;background:#eff4fb;border-radius:8px;margin:10px 0}
.rowline:nth-child(2){width:85%}.rowline:nth-child(3){width:72%}.rowline:nth-child(4){width:92%}
/* phone with real screenshot */
.phone{position:absolute;z-index:4;inset-inline-end:2%;bottom:6px;width:150px;border:8px solid #1b2f5c;border-radius:30px;background:#fff;box-shadow:0 22px 35px rgba(17,45,100,.26);overflow:hidden;transform:rotate(5deg)}
html[dir="rtl"] .phone{inset-inline-end:auto;inset-inline-start:2%;transform:rotate(-5deg)}
.phone img{width:100%;height:auto;display:block;border-radius:22px}
@media (max-width:560px){.phone{width:118px}}
/* floating badges */
.fbadge{position:absolute;z-index:6;display:flex;align-items:center;gap:8px;padding:10px 13px;border:1px solid #dfe8f7;background:rgba(255,255,255,.96);border-radius:14px;box-shadow:0 14px 32px rgba(27,55,110,.11);font-size:12.5px;font-weight:800;color:var(--ink)}
.fbadge span{width:28px;height:28px;display:grid;place-items:center;border-radius:9px;color:var(--primary);background:#edf4ff}
.fbadge.web{top:30px;inset-inline-start:2%}
.fbadge.mobile{top:150px;inset-inline-start:-3%}
html[dir="rtl"] .fbadge.web{inset-inline-start:auto;inset-inline-end:2%}
html[dir="rtl"] .fbadge.mobile{inset-inline-start:auto;inset-inline-end:-3%}
@media (max-width:560px){.fbadge{display:none}}

/* ---------------- services ---------------- */
.services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
@media (max-width:920px){.services{grid-template-columns:1fr}}
.service-card{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:linear-gradient(180deg,#fff,#fbfdff);box-shadow:var(--shadow-md)}
.service-icon{width:56px;height:56px;display:grid;place-items:center;border-radius:16px;margin-bottom:20px;font-size:24px;color:var(--primary);background:linear-gradient(135deg,#edf4ff,#eafcff)}
.service-card h3{margin-bottom:10px;font-size:23px}
.service-card p{line-height:1.75}
.service-card ul{margin:14px 0 0;padding-inline-start:1.1em;color:var(--muted)}
.service-card li{margin:6px 0}

/* ---------------- generic cards / grids ---------------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-md)}
.card h3{margin-bottom:8px}

/* app card (apps overview + home compact) */
.app-card{display:flex;flex-direction:column;gap:16px}
.app-card .app-head{display:flex;align-items:center;gap:16px}
.app-card .app-head img{width:66px;height:66px;border-radius:16px;box-shadow:var(--shadow-sm)}
.app-card .app-head h3{margin:0;font-size:1.3rem}
.badge{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.04em;text-transform:uppercase;padding:4px 11px;border-radius:999px}
.badge-live{background:#e3f9ee;color:#0a7d43}
.badge-soon{background:#eef4ff;color:var(--primary)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:.85rem;background:var(--soft);color:var(--muted);padding:6px 12px;border-radius:999px;border:1px solid var(--line)}
.linkrow{display:flex;flex-wrap:wrap;gap:8px 18px;font-weight:700;font-size:.95rem}

/* featured apps (home, reference-style large cards) */
.apps-section{background:var(--soft-2);border-top:1px solid #edf2fb;border-bottom:1px solid #edf2fb}
.app-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
@media (max-width:920px){.app-grid{grid-template-columns:1fr}}
.app-card-large{overflow:hidden;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:0 16px 38px rgba(34,72,135,.08);display:flex;flex-direction:column}
.app-visual{min-height:250px;padding:26px;display:grid;place-items:center;background:radial-gradient(circle at 80% 20%,rgba(32,199,217,.22),transparent 32%),linear-gradient(135deg,#eef4ff,#f8fbff)}
.app-visual .device{display:flex;align-items:center;gap:16px}
.app-visual .app-icon{width:76px;height:76px;border-radius:18px;box-shadow:var(--shadow-md)}
.app-visual .app-shot{width:150px;border-radius:22px;border:6px solid #1b2f5c;box-shadow:0 20px 40px rgba(31,70,140,.2)}
.app-body{padding:26px;display:flex;flex-direction:column;gap:14px;flex:1}
.app-body h3{font-size:23px}
.app-body>p{line-height:1.7}
.text-link{color:var(--primary);font-weight:800}
.text-link:hover{text-decoration:none}

/* store buttons */
.stores{display:flex;flex-wrap:wrap;gap:12px}
.store-btn{display:inline-flex;align-items:center;gap:10px;background:var(--navy);color:#fff;border-radius:12px;padding:10px 18px;font-weight:600;line-height:1.1}
.store-btn:hover{opacity:.92;text-decoration:none;transform:translateY(-1px)}
.store-btn small{display:block;font-size:.7rem;opacity:.8;font-weight:500}
.store-btn strong{font-size:1rem}
.store-btn svg{width:22px;height:22px;flex:none;fill:currentColor}
html[data-lang="ar"] .store-btn{direction:rtl}

/* screenshots row */
.shots{display:flex;gap:16px;overflow-x:auto;padding-block:6px;scroll-snap-type:x mandatory}
.shots img{width:220px;flex:none;border-radius:20px;border:1px solid var(--line);box-shadow:var(--shadow-md);scroll-snap-align:start;background:var(--soft)}

/* features / why */
.features{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.feature{display:flex;gap:12px;align-items:flex-start}
.feature .dot{flex:none;width:30px;height:30px;border-radius:9px;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-size:.9rem;box-shadow:var(--shadow-sm)}
.feature h4{margin:0 0 2px;font-size:1.02rem}
.feature p{font-size:.95rem;margin:0}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:920px){.why-grid{grid-template-columns:1fr}}
.why-card{padding:26px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow-sm)}
.why-card .service-icon{width:46px;height:46px;font-size:20px;margin-bottom:16px}
.why-card strong{display:block;margin-bottom:8px;font-size:18px;color:var(--ink)}
.why-card p{line-height:1.65}

/* CTA band */
.cta-band{margin:0 auto;border-radius:30px;padding:44px;color:#fff;
  background:radial-gradient(circle at 85% 20%,rgba(32,199,217,.32),transparent 30%),linear-gradient(135deg,#0b2a71,#124cc8);
  display:flex;align-items:center;justify-content:space-between;gap:24px;box-shadow:0 25px 55px rgba(17,64,160,.25)}
.cta-band h2{margin:0 0 8px;font-size:30px;color:#fff}
.cta-band p{margin:0;color:rgba(255,255,255,.85)}
.cta-band .btn-secondary{border-color:rgba(255,255,255,.3);color:#fff;background:rgba(255,255,255,.12)}
@media (max-width:920px){.cta-band{flex-direction:column;align-items:flex-start}}
@media (max-width:560px){.cta-band{padding:28px}}

/* prose (privacy, tutorials, contact, about text) */
.prose{max-width:780px;margin-inline:auto}
.prose h2{margin-top:1.7em;font-size:26px}
.prose h3{margin-top:1.3em;margin-bottom:.3em}
.prose p,.prose li{color:var(--muted)}
.prose p{margin:.7em 0}
.prose ul,.prose ol{padding-inline-start:1.3em;margin:.6em 0}
.prose li{margin:.35em 0}
.prose a{font-weight:700}
.prose .updated{color:var(--muted);font-size:.95rem;border:1px solid var(--line);background:var(--soft);padding:8px 14px;border-radius:10px;display:inline-block;margin-top:6px}
.callout{background:var(--soft);border:1px solid var(--line);border-inline-start:4px solid var(--primary);border-radius:12px;padding:16px 20px;margin:1.3em 0}
.callout p{margin:0}
.toc{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 24px;margin:1.4em 0}
.toc strong{display:block;margin-bottom:8px;color:var(--ink)}
.toc ul{list-style:none;padding:0;margin:0;columns:2;gap:24px}
.toc li{margin:.3em 0}
.toc a{font-weight:700}
@media (max-width:560px){.toc ul{columns:1}}

/* steps */
.steps{counter-reset:step;list-style:none;padding:0;display:grid;gap:14px;margin:1em 0}
.steps li{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px 18px 62px;box-shadow:var(--shadow-sm)}
html[dir="rtl"] .steps li{padding:18px 62px 18px 20px}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;inset-inline-start:18px;top:18px;width:30px;height:30px;border-radius:50%;background:var(--grad-btn);color:#fff;font-weight:800;display:grid;place-items:center;font-size:.95rem}
.steps li h4{margin:0 0 3px}
.steps li p{margin:0}

/* faq */
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:2px 20px;margin:10px 0;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:800;padding:15px 0;list-style:none;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:inline-end;color:var(--primary);font-weight:800;font-size:1.35rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{padding-bottom:15px;margin:0}

/* breadcrumb */
.crumbs{font-size:.9rem;color:var(--muted);padding:18px 0}
.crumbs a{color:var(--muted);font-weight:600}
.crumbs a:hover{color:var(--primary)}
.crumbs span{margin-inline:7px;color:#b9c4db}

/* app detail head */
.app-detail-head{display:flex;align-items:center;gap:18px;margin-bottom:18px}
.app-detail-head img{width:84px;height:84px;border-radius:20px;box-shadow:var(--shadow-md)}

/* video */
.video-wrap{position:relative;padding-top:56.25%;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line)}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* footer */
.site-footer{margin-top:auto;background:var(--navy);color:#fff;padding:44px 0}
.site-footer a{color:#e2e8f0}
.footer-grid{display:grid;gap:28px;grid-template-columns:1.5fr repeat(3,1fr)}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:460px){.footer-grid{grid-template-columns:1fr}}
.footer-grid h4{color:#fff;font-size:.9rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.08em}
html[dir="rtl"] .footer-grid h4{letter-spacing:0}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:7px 0}
.footer-grid a{color:rgba(255,255,255,.75);font-size:.95rem}
.footer-grid a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:800;font-size:18px;margin-bottom:10px}
.footer-brand img{width:36px;height:36px;border-radius:11px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:20px;font-size:.88rem;color:rgba(255,255,255,.7);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------------- localized privacy policy ---------------- */
.policy-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-md);margin-bottom:28px}
.policy-head{display:flex;align-items:center;gap:18px;margin-bottom:16px}
.policy-icon{width:76px;height:76px;border-radius:19px;box-shadow:var(--shadow-md);flex:none}
.policy-heading{min-width:0}
.policy-heading .eyebrow{margin-bottom:8px}
.policy-title{font-size:clamp(23px,3.2vw,31px);margin:0;line-height:1.15}
.lang-select{display:flex;flex-wrap:wrap;align-items:center;gap:10px 12px;padding-top:6px;border-top:1px solid var(--line);margin-top:8px}
.lang-select-label{font-weight:800;color:var(--ink);font-size:.95rem}
.lang-pills{display:flex;flex-wrap:wrap;gap:8px}
.lang-pill{display:inline-flex;align-items:center;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:700;font-size:.9rem}
.lang-pill:hover{border-color:var(--primary-2);color:var(--primary);text-decoration:none}
.lang-pill.active{background:var(--grad-btn);color:#fff;border-color:transparent;box-shadow:0 8px 18px rgba(22,93,255,.22)}
.lang-pill.static{background:var(--soft);cursor:default;color:var(--muted)}
.policy-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:16px}
.policy.prose{max-width:820px;margin-inline:auto}
.policy.prose h2{scroll-margin-top:100px;font-size:22px}
.policy.prose .toc{scroll-margin-top:100px}

/* available languages (app pages) */
.avail{max-width:780px;margin:26px auto 0;display:grid;gap:14px}
.avail-row{display:flex;gap:14px 20px;align-items:center;justify-content:space-between;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 20px;box-shadow:var(--shadow-sm)}
.avail-label{font-weight:800;color:var(--ink)}

/* ---------------- standalone privacy document ---------------- */
body.doc{background:#f8fbff}
.doc-wrap{width:100%;max-width:840px;margin-inline:auto;padding:48px 22px 64px}
.doc-head{border-bottom:1px solid var(--line);padding-bottom:22px;margin-bottom:6px;display:flex;flex-direction:column;align-items:flex-start;gap:4px}
.doc-icon{width:72px;height:72px;border-radius:18px;box-shadow:var(--shadow-md);margin-bottom:10px}
.doc-app{font-weight:700;color:var(--muted);font-size:.95rem}
.doc-title{font-size:clamp(23px,3.4vw,32px);margin:0;line-height:1.2}
.doc-date{color:var(--muted);font-size:.95rem;margin:2px 0 0}
.doc .policy.prose{max-width:none;margin:0}
.doc .policy.prose h2{font-size:22px;margin-top:1.6em}
.doc-foot{margin-top:38px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}
/* language switcher on the standalone privacy doc */
.doc-topbar{display:flex;justify-content:flex-end;width:100%;margin-bottom:10px}
.lang-dd{position:relative;display:inline-block}
.lang-dd>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-weight:700;color:var(--ink);font-size:.9rem}
.lang-dd>summary::-webkit-details-marker{display:none}
.lang-dd>summary:hover{border-color:var(--primary-2);color:var(--primary)}
.lang-dd>summary svg{width:16px;height:16px}
.lang-dd .chev{color:var(--muted);font-size:.8em}
.lang-dd[open] .chev{transform:rotate(180deg)}
.lang-dd-menu{position:absolute;inset-inline-end:0;top:calc(100% + 8px);z-index:20;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;min-width:190px;display:grid;gap:2px;max-height:60vh;overflow:auto}
.lang-opt{display:block;padding:9px 12px;border-radius:9px;color:var(--ink);font-weight:600;font-size:.92rem}
.lang-opt:hover{background:var(--soft);text-decoration:none}
.lang-opt.active{background:var(--grad-btn);color:#fff}

/* WhatsApp button */
.wa-btn{display:inline-flex;align-items:center;gap:10px;background:#25d366;color:#fff;border-radius:12px;padding:11px 18px;font-weight:700;line-height:1.1}
.wa-btn:hover{opacity:.92;text-decoration:none;transform:translateY(-1px)}
.wa-btn svg{flex:none}

/* 404 */
.center-screen{flex:1;display:grid;place-items:center;text-align:center;padding:70px 20px}