/* ==========================================================================
   Appify — Design System v1
   Quiet editorial. Paper, ink, one warm accent. Hairlines over shadows.
   ========================================================================== */

:root{
  /* Color */
  --paper:#F5F2EC;
  --paper-2:#ECE7DE;
  --paper-3:#E3DDD1;
  --card:#FBFAF7;
  --ink:#0F1634;          /* brand navy */
  --ink-2:#2B3150;
  --ink-3:#545a74;
  --muted:#6E7083;
  --rule:#D8D1C4;
  --rule-strong:#B9B0A0;
  --accent:#E8792A;       /* brand orange — used as a mark, not a fill */
  --accent-ink:#A9520F;   /* orange that passes AA on paper */
  --indigo:#5E5E92;
  --ok:#2F6B4F;

  /* Type */
  --f-sans:"IBM Plex Sans Arabic", system-ui, -apple-system, "Segoe UI", Tahoma, sans-serif;
  --f-serif:"Noto Naskh Arabic", "IBM Plex Sans Arabic", serif;
  --f-mono:"IBM Plex Mono", "IBM Plex Sans Arabic", ui-monospace, monospace;

  --t-xs:.8125rem;   /* 13 */
  --t-sm:.9375rem;   /* 15 */
  --t-md:1.0625rem;  /* 17 */
  --t-lg:1.25rem;    /* 20 */
  --t-xl:clamp(1.5rem, 1.1rem + 1.2vw, 2rem);
  --t-2xl:clamp(1.9rem, 1.2rem + 2.4vw, 3rem);
  --t-3xl:clamp(2.3rem, 1.2rem + 4vw, 4.4rem);

  /* Space (4pt) */
  --s-1:.25rem; --s-2:.5rem; --s-3:.75rem; --s-4:1rem; --s-5:1.5rem;
  --s-6:2rem; --s-7:3rem; --s-8:4rem; --s-9:6rem; --s-10:8rem;

  --wrap:1240px;
  --gutter:clamp(1rem, .5rem + 2.5vw, 2.5rem);
  --radius:6px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* Reset ------------------------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-sans);font-size:var(--t-md);line-height:1.8;font-weight:400;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:0;text-wrap:balance}
p{margin:0 0 var(--s-4)}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0}
::selection{background:var(--ink);color:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;inset-inline-start:1rem;top:-3rem;background:var(--ink);color:var(--paper);padding:.5rem 1rem;z-index:100;border-radius:var(--radius)}
.skip:focus{top:1rem}

/* Layout ----------------------------------------------------------------- */
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(4rem, 2rem + 6vw, 8rem)}
.section--tight{padding-block:clamp(3rem, 2rem + 3vw, 5rem)}
.section + .section{border-top:1px solid var(--rule)}
.alt{background:var(--paper-2)}
.grid{display:grid;gap:var(--s-6)}
.g-12{grid-template-columns:repeat(12,minmax(0,1fr))}
@media (max-width:900px){.g-12{grid-template-columns:1fr}.g-12>*{grid-column:auto!important}}

/* Type utilities --------------------------------------------------------- */
.eyebrow{display:flex;align-items:center;gap:.75rem;font-family:var(--f-sans);font-size:var(--t-xs);letter-spacing:0;font-weight:500;color:var(--ink-3);margin-bottom:var(--s-5)}
.eyebrow b{font-weight:500;color:var(--ink)}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none}
.eyebrow--plain::before{display:none}
.num{font-family:var(--f-mono);font-feature-settings:"tnum";letter-spacing:-.01em}
.display{font-size:var(--t-3xl);font-weight:600;line-height:1.18;letter-spacing:-.01em}
.h2{font-size:var(--t-2xl);font-weight:600;line-height:1.25}
.h3{font-size:var(--t-xl);font-weight:600}
.lead{font-size:clamp(1.1rem, 1rem + .5vw, 1.3rem);line-height:1.85;color:var(--ink-2);max-width:40em}
.muted{color:var(--muted)}
.serif{font-family:var(--f-serif);font-weight:500}
.u-accent{color:var(--accent-ink)}
.measure{max-width:38em}

/* Header ----------------------------------------------------------------- */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb, var(--paper) 92%, transparent);backdrop-filter:saturate(1.2) blur(10px);-webkit-backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.site-header.is-scrolled{border-bottom-color:var(--rule)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:var(--s-5);height:72px}
.brand{display:flex;align-items:center;flex:none}
.brand img{height:30px;width:auto}
.menu{display:flex;align-items:center;gap:clamp(1rem,.5rem + 1.4vw,2.25rem);list-style:none}
.menu a{font-size:var(--t-sm);color:var(--ink-2);position:relative;padding-block:.4rem;transition:color .2s}
.menu a:hover,.menu a[aria-current="page"]{color:var(--ink)}
.menu a[aria-current="page"]::after{content:"";position:absolute;inset-inline:0;bottom:-2px;height:1.5px;background:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:var(--s-4)}
.nav-phone{font-family:var(--f-mono);font-size:var(--t-xs);color:var(--ink-3);direction:ltr}
.burger{display:none;width:44px;height:44px;border:1px solid var(--rule);border-radius:var(--radius);background:transparent;cursor:pointer;place-items:center}
.burger span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;inset-inline:0;height:1.5px;background:var(--ink);transition:transform .25s var(--ease)}
.burger span::before{top:-6px}.burger span::after{top:6px}
.nav-open .burger span{background:transparent}
.nav-open .burger span::before{transform:translateY(6px) rotate(45deg)}
.nav-open .burger span::after{transform:translateY(-6px) rotate(-45deg)}
@media (max-width:980px){
  .nav-phone{display:none}
  .burger{display:grid}
  .menu{position:fixed;inset:72px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;background:var(--paper);border-bottom:1px solid var(--rule);padding:var(--s-3) var(--gutter) var(--s-6);transform:translateY(-8px);opacity:0;visibility:hidden;transition:all .25s var(--ease)}
  .menu li{border-bottom:1px solid var(--rule)}
  .menu a{display:block;padding-block:1rem;font-size:var(--t-md)}
  .menu a[aria-current="page"]::after{display:none}
  .nav-open .menu{transform:none;opacity:1;visibility:visible}
  .nav-cta .btn{display:none}
}

/* Buttons & links -------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;min-height:48px;padding:.7rem 1.4rem;border-radius:var(--radius);font-size:var(--t-sm);font-weight:500;border:1px solid var(--ink);background:var(--ink);color:var(--paper);cursor:pointer;transition:background .2s,color .2s,border-color .2s;white-space:nowrap}
.btn:hover{background:var(--ink-2);border-color:var(--ink-2)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule-strong)}
.btn--ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn--light{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn--light:hover{background:transparent;color:var(--paper)}
.btn--sm{min-height:40px;padding:.45rem 1rem}
.arrow{display:inline-block;transition:transform .25s var(--ease)}
a:hover .arrow,button:hover .arrow{transform:translateX(-4px)}
.link{display:inline-flex;align-items:center;gap:.5rem;font-weight:500;border-bottom:1px solid var(--rule-strong);padding-bottom:2px;transition:border-color .2s}
.link:hover{border-color:var(--ink)}

/* Hero ------------------------------------------------------------------- */
.hero{padding-block:clamp(3.5rem,2rem + 6vw,7.5rem) clamp(3rem,2rem + 4vw,6rem)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:clamp(2rem,1rem + 5vw,6rem);align-items:end}
.hero h1{margin-bottom:var(--s-6)}
.hero .lead{margin-bottom:var(--s-7)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:var(--s-5)}
.spec{border-top:1px solid var(--ink);font-size:var(--t-sm)}
.spec-title{font-family:var(--f-sans);font-size:var(--t-xs);color:var(--ink-3);padding-block:.8rem;border-bottom:1px solid var(--rule)}
.spec dl{margin:0}
.spec div{display:grid;grid-template-columns:8.5rem 1fr;gap:1rem;padding-block:.85rem;border-bottom:1px solid var(--rule)}
.spec dt{color:var(--muted)}
.spec dd{margin:0;color:var(--ink)}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;align-items:start}}

/* Page head (inner pages) ----------------------------------------------- */
.page-head{padding-block:clamp(3rem,2rem + 4vw,6rem) clamp(2.5rem,1.5rem + 3vw,4.5rem);border-bottom:1px solid var(--rule)}
.page-head h1{font-size:var(--t-3xl);font-weight:600;line-height:1.2;max-width:18em;margin-bottom:var(--s-5)}
.crumbs{display:flex;flex-wrap:wrap;gap:.5rem;font-size:var(--t-xs);color:var(--muted);margin-bottom:var(--s-6);list-style:none}
.crumbs li+li::before{content:"/";margin-inline-end:.5rem;color:var(--rule-strong)}
.crumbs a:hover{color:var(--ink)}

/* Section heading -------------------------------------------------------- */
.sh{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:var(--s-6);align-items:end;margin-bottom:clamp(2.5rem,1.5rem + 3vw,4.5rem)}
.sh .lead{font-size:var(--t-md);color:var(--ink-3)}
@media (max-width:900px){.sh{grid-template-columns:1fr}}

/* Brand strip ------------------------------------------------------------ */
.brands{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.brands a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;padding:1.75rem 1rem;border-inline-start:1px solid var(--rule);min-height:150px;transition:background .2s}
.brands a:first-child{border-inline-start:0}
.brands a:hover{background:var(--card)}
.brands img{height:52px;width:auto;object-fit:contain;filter:grayscale(1) contrast(1.05);opacity:.82;transition:filter .3s,opacity .3s}
.brands a:hover img{filter:none;opacity:1}
.brands span{font-size:var(--t-xs);color:var(--muted)}
@media (max-width:820px){.brands{grid-template-columns:repeat(2,1fr)}.brands a{border-top:1px solid var(--rule)}.brands a:nth-child(odd){border-inline-start:0}.brands a:nth-child(-n+2){border-top:0}.brands a:last-child{grid-column:1/-1}}

/* Index list (services) -------------------------------------------------- */
.index{list-style:none;border-top:1px solid var(--ink)}
.index li{border-bottom:1px solid var(--rule)}
.index a{display:grid;grid-template-columns:4rem minmax(0,1.1fr) minmax(0,1.6fr) 2rem;gap:var(--s-5);align-items:baseline;padding-block:1.6rem;transition:background .2s,padding .3s var(--ease)}
.index a:hover{background:var(--card);padding-inline:1rem}
.index .n{font-family:var(--f-mono);font-size:var(--t-xs);color:var(--muted)}
.index h3{font-size:var(--t-lg);font-weight:600}
.index p{color:var(--ink-3);font-size:var(--t-sm);margin:0}
.index .arrow{color:var(--ink-3);justify-self:end}
@media (max-width:760px){.index a{grid-template-columns:2.5rem 1fr;row-gap:.35rem}.index p{grid-column:2}.index .arrow{display:none}}

/* Cards ------------------------------------------------------------------ */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.cards--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cards--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--paper);padding:clamp(1.5rem,1rem + 1.5vw,2.25rem);display:flex;flex-direction:column;gap:var(--s-3)}
.alt .card{background:var(--paper-2)}
.card h3{font-size:var(--t-lg)}
.card p{color:var(--ink-3);font-size:var(--t-sm)}
.card .n{font-family:var(--f-mono);font-size:var(--t-xs);color:var(--accent-ink)}
@media (max-width:980px){.cards--4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:820px){.cards,.cards--2{grid-template-columns:1fr}}
@media (max-width:560px){.cards--4{grid-template-columns:1fr}}

/* Case studies ----------------------------------------------------------- */
.case{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:clamp(2rem,1rem + 4vw,5rem);align-items:center;padding-block:clamp(2.5rem,1.5rem + 3vw,4rem);border-top:1px solid var(--rule)}
.case:first-of-type{border-top:1px solid var(--ink)}
.case-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;font-family:var(--f-sans);font-size:var(--t-xs);color:var(--muted);margin-bottom:var(--s-4)}
.case h3{font-size:var(--t-2xl);margin-bottom:var(--s-4)}
.case p{color:var(--ink-2)}
.case-figure{background:var(--paper-2);border:1px solid var(--rule);border-radius:var(--radius);aspect-ratio:4/3;display:grid;place-items:center;overflow:hidden;position:relative}
.case-figure img.logo{max-width:52%;max-height:42%;object-fit:contain}
.phones{position:absolute;inset:0;display:flex;gap:4%;justify-content:center;align-items:flex-end;padding:8% 6% 0}
.phones img{width:30%;border-radius:14px 14px 0 0;border:1px solid var(--rule-strong);border-bottom:0;box-shadow:0 1px 0 var(--rule)}
.phones img:nth-child(2){transform:translateY(-8%)}
.stats{display:flex;flex-wrap:wrap;gap:var(--s-6);margin-block:var(--s-5);padding-block:var(--s-4);border-block:1px solid var(--rule)}
.stats div{display:flex;flex-direction:column}
.stats b{font-family:var(--f-mono);font-weight:500;font-size:var(--t-lg);direction:ltr;text-align:right}
.stats span{font-size:var(--t-xs);color:var(--muted)}
.case.flip .case-figure{order:-1}
@media (max-width:900px){.case{grid-template-columns:1fr}.case.flip .case-figure{order:0}}

/* Process ---------------------------------------------------------------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:s;border-top:1px solid var(--ink)}
.step{padding:1.75rem 1.5rem 0 0;border-inline-start:1px solid var(--rule);padding-inline:1.5rem}
.step:first-child{border-inline-start:0;padding-inline-start:0}
.step .n{font-family:var(--f-mono);font-size:var(--t-xs);color:var(--accent-ink);display:block;margin-bottom:var(--s-4)}
.step h3{font-size:var(--t-lg);margin-bottom:var(--s-3)}
.step p{font-size:var(--t-sm);color:var(--ink-3)}
.step .dur{display:block;margin-top:var(--s-4);font-family:var(--f-sans);font-size:var(--t-xs);color:var(--muted)}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr;row-gap:2rem}.step:nth-child(3){border-inline-start:0;padding-inline-start:0}}
@media (max-width:560px){.steps{grid-template-columns:1fr}.step{border-inline-start:0;padding-inline:0;border-top:1px solid var(--rule)}.step:first-child{border-top:0}}

/* Figures row ------------------------------------------------------------ */
.figures{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--rule)}
.figures div{padding:1.75rem 1.25rem 0 0;padding-inline:1.25rem;border-inline-start:1px solid var(--rule)}
.figures div:first-child{border-inline-start:0;padding-inline-start:0}
.figures b{display:block;font-family:var(--f-mono);font-weight:400;font-size:clamp(1.8rem,1.2rem + 2vw,2.8rem);line-height:1.1;direction:ltr;text-align:right;letter-spacing:-.02em}
.figures span{display:block;margin-top:.6rem;font-size:var(--t-sm);color:var(--ink-3)}
@media (max-width:760px){.figures{grid-template-columns:1fr 1fr;row-gap:1.5rem}.figures div:nth-child(3){border-inline-start:0;padding-inline-start:0}}

/* Quote ------------------------------------------------------------------ */
.pull{font-family:var(--f-serif);font-size:clamp(1.5rem,1.1rem + 1.6vw,2.4rem);line-height:1.6;font-weight:500;max-width:24em;color:var(--ink)}
.pull::before{content:"";display:block;width:3rem;height:2px;background:var(--accent);margin-bottom:var(--s-5)}

/* Articles list ---------------------------------------------------------- */
.posts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1.5rem,1rem + 2vw,3rem)}
.post{display:flex;flex-direction:column;gap:var(--s-3);padding-top:var(--s-5);border-top:1px solid var(--ink)}
.post .meta{display:flex;gap:1rem;font-family:var(--f-sans);font-size:var(--t-xs);color:var(--muted)}
.post .tag{color:var(--accent-ink)}
.post h3{font-size:var(--t-lg);line-height:1.5}
.post h3 a{background:linear-gradient(currentColor,currentColor) 100% 100%/0 1px no-repeat;transition:background-size .35s var(--ease)}
.post:hover h3 a{background-size:100% 1px}
.post p{color:var(--ink-3);font-size:var(--t-sm)}
.post--lg{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:var(--s-6);padding-top:var(--s-6)}
.post--lg h3{font-size:var(--t-2xl);line-height:1.35}
@media (max-width:900px){.posts{grid-template-columns:1fr 1fr}.post--lg{grid-template-columns:1fr}}
@media (max-width:620px){.posts{grid-template-columns:1fr}}

/* Article ---------------------------------------------------------------- */
.article-head{padding-block:clamp(3rem,2rem + 4vw,6rem) clamp(2rem,1rem + 2vw,3rem)}
.article-head h1{font-size:clamp(2rem,1.3rem + 2.8vw,3.4rem);line-height:1.3;max-width:20em;margin-bottom:var(--s-5)}
.byline{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;font-size:var(--t-xs);color:var(--muted);font-family:var(--f-sans);padding-top:var(--s-5);border-top:1px solid var(--rule)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 16rem;gap:clamp(2rem,1rem + 5vw,6rem);align-items:start;padding-bottom:var(--s-9)}
.toc{position:sticky;top:96px;font-size:var(--t-sm);border-top:1px solid var(--ink);padding-top:var(--s-4)}
.toc b{display:block;font-family:var(--f-sans);font-size:var(--t-xs);font-weight:400;color:var(--muted);margin-bottom:var(--s-3)}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t;padding-block:.4rem;border-bottom:1px solid var(--rule)}
.toc li a{display:flex;gap:.6rem;color:var(--ink-3)}
.toc li a::before{content:counter(t,decimal-leading-zero);font-family:var(--f-mono);font-size:var(--t-xs);color:var(--muted);padding-top:.2rem}
.toc li a:hover{color:var(--ink)}
@media (max-width:980px){.article-layout{grid-template-columns:1fr}.toc{position:static;order:-1}}

.prose{font-size:1.125rem;line-height:2;color:var(--ink-2);max-width:42rem}
.prose>*+*{margin-top:1.25em}
.prose h2{font-size:clamp(1.4rem,1.15rem + .9vw,1.85rem);color:var(--ink);margin-top:2.4em;padding-top:1.2em;border-top:1px solid var(--rule);scroll-margin-top:96px}
.prose h3{font-size:1.25rem;color:var(--ink);margin-top:1.8em}
.prose p{margin:0}
.prose ul,.prose ol{padding-inline-start:1.4em}
.prose li{margin-block:.5em}
.prose li::marker{color:var(--accent-ink)}
.prose strong{color:var(--ink);font-weight:600}
.prose a{color:var(--ink);border-bottom:1px solid var(--accent);}
.prose a:hover{background:var(--paper-2)}
.prose blockquote{margin:2em 0;padding:0 1.25em;border-inline-start:2px solid var(--accent);font-family:var(--f-serif);font-size:1.25rem;color:var(--ink)}
.prose table{width:100%;border-collapse:collapse;font-size:var(--t-sm);margin-block:1.5em}
.prose th,.prose td{text-align:start;padding:.75rem .9rem;border-bottom:1px solid var(--rule);vertical-align:top}
.prose th{font-weight:600;color:var(--ink);border-bottom:1px solid var(--ink);background:transparent}
.table-wrap{overflow-x:auto}
.note{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:1.25rem 1.5rem;font-size:var(--t-sm)}
.note b{display:block;font-family:var(--f-sans);font-weight:500;font-size:var(--t-xs);color:var(--accent-ink);margin-bottom:.4rem}
.lede{font-size:1.3rem;line-height:1.9;color:var(--ink)}

/* FAQ -------------------------------------------------------------------- */
.faq{border-top:1px solid var(--ink)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:1rem;align-items:center;padding-block:1.35rem;font-size:var(--t-lg);font-weight:500}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:12px;height:12px;flex:none;background:linear-gradient(var(--ink),var(--ink)) center/100% 1.5px no-repeat,linear-gradient(var(--ink),var(--ink)) center/1.5px 100% no-repeat;transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding-bottom:1.5rem;color:var(--ink-3);max-width:46em}

/* Forms ------------------------------------------------------------------ */
.form{display:grid;gap:var(--s-5)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-5)}
@media (max-width:640px){.form .row{grid-template-columns:1fr}}
.field label,.field legend{display:block;font-size:var(--t-sm);font-weight:500;margin-bottom:.5rem;color:var(--ink)}
.field .hint{font-size:var(--t-xs);color:var(--muted);font-weight:400}
.input,.textarea,.select{width:100%;min-height:50px;padding:.75rem 1rem;background:var(--card);border:1px solid var(--rule-strong);border-radius:var(--radius);transition:border-color .2s,box-shadow .2s}
.textarea{min-height:140px;resize:vertical;line-height:1.7}
.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 3px color-mix(in srgb,var(--ink) 12%,transparent)}
fieldset{border:0;margin:0;padding:0}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{position:relative}
.chip input{position:absolute;opacity:0;inset:0;cursor:pointer}
.chip span{display:inline-flex;align-items:center;min-height:42px;padding:.45rem 1rem;border:1px solid var(--rule-strong);border-radius:var(--radius);font-size:var(--t-sm);background:var(--card);transition:all .2s;cursor:pointer}
.chip input:checked+span{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.chip input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
.form-status{font-size:var(--t-sm);padding:1rem 1.25rem;border-radius:var(--radius);display:none}
.form-status.ok{display:block;background:#E7EFE9;color:var(--ok);border:1px solid #C5D8CB}
.form-status.err{display:block;background:#F6E6DC;color:var(--accent-ink);border:1px solid #E8C7B2}

/* Contact blocks --------------------------------------------------------- */
.contact-list{list-style:none;border-top:1px solid var(--ink)}
.contact-list li{display:grid;grid-template-columns:7rem 1fr;gap:1rem;padding-block:1rem;border-bottom:1px solid var(--rule);font-size:var(--t-sm)}
.contact-list span{color:var(--muted)}
.contact-list a{border-bottom:1px solid var(--rule-strong)}
.contact-list a:hover{border-color:var(--ink)}
.ltr{direction:ltr;unicode-bidi:isolate;display:inline-block}

/* CTA band --------------------------------------------------------------- */
.cta{background:var(--ink);color:var(--paper);padding-block:clamp(4rem,2rem + 6vw,7rem)}
.cta .grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:end;gap:var(--s-7)}
.cta h2{font-size:var(--t-2xl);line-height:1.3}
.cta p{color:#C9CBD6}
.cta .eyebrow{color:#A9ABBC}
.cta .eyebrow b{color:var(--paper)}
.cta-actions{display:flex;flex-wrap:wrap;gap:var(--s-4)}
.cta .btn--ghost{color:var(--paper);border-color:#4A5070}
.cta .btn--ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
@media (max-width:900px){.cta .grid{grid-template-columns:1fr}}

/* Footer ----------------------------------------------------------------- */
.site-footer{background:var(--paper);padding-block:var(--s-8) var(--s-6);font-size:var(--t-sm);border-top:1px solid var(--rule)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:var(--s-6)}
.foot-grid h2{font-size:var(--t-xs);font-family:var(--f-sans);font-weight:400;color:var(--muted);margin-bottom:var(--s-4)}
.foot-grid ul{list-style:none;display:grid;gap:.55rem}
.foot-grid a{color:var(--ink-2)}
.foot-grid a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.foot-about img{height:30px;width:auto;margin-bottom:var(--s-4)}
.foot-about p{color:var(--ink-3);max-width:24em}
.legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;margin-top:var(--s-8);padding-top:var(--s-5);border-top:1px solid var(--rule);font-size:var(--t-xs);color:var(--muted)}
.legal a:hover{color:var(--ink)}
@media (max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}.foot-about{grid-column:1/-1}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* Misc ------------------------------------------------------------------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:clamp(2rem,1rem + 5vw,6rem)}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.sticky{position:sticky;top:110px;align-self:start}
@media (max-width:900px){.sticky{position:static}}
.checklist{list-style:none;display:grid;gap:.85rem}
.checklist li{display:grid;grid-template-columns:1.25rem 1fr;gap:.75rem;color:var(--ink-2)}
.checklist li::before{content:"";width:.6rem;height:.6rem;margin-top:.7rem;border:1.5px solid var(--ink);border-radius:50%}
.tags{display:flex;flex-wrap:wrap;gap:.4rem}
.tags span{font-family:var(--f-mono);font-size:var(--t-xs);padding:.2rem .6rem;border:1px solid var(--rule-strong);border-radius:3px;color:var(--ink-3);direction:ltr}
.rule{height:1px;background:var(--rule);border:0;margin:0}
.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}
.err-page{min-height:60vh;display:grid;align-content:center}
.err-page .code{font-family:var(--f-mono);font-size:clamp(4rem,2rem + 8vw,8rem);line-height:1;color:var(--paper-3);direction:ltr}
.wa-float{position:fixed;inset-inline-start:1.25rem;bottom:1.25rem;z-index:40;display:flex;align-items:center;gap:.5rem;background:var(--card);border:1px solid var(--rule-strong);border-radius:999px;padding:.55rem 1rem .55rem .8rem;font-size:var(--t-xs);font-weight:500;color:var(--ink);box-shadow:0 6px 20px -10px rgba(15,22,52,.35);transition:transform .2s}
.wa-float:hover{transform:translateY(-2px)}
.wa-float i{width:8px;height:8px;border-radius:50%;background:#25A366;display:block}
@media print{.site-header,.site-footer,.cta,.wa-float,.toc{display:none}}

/* ==========================================================================
   Mobile refinement (v2)
   ========================================================================== */
.promo{margin-block:2.2em!important;padding:1.5rem 1.6rem;background:var(--card);border:1px solid var(--rule);border-inline-start:3px solid var(--ink);border-radius:var(--radius);font-size:1rem;line-height:1.85;color:var(--ink-2)}
.promo .k{display:flex;align-items:center;gap:.6rem;font-size:var(--t-xs);font-weight:600;color:var(--ink);margin-bottom:.6rem}
.promo .k::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.promo p{margin:0}
.promo .go{display:inline-flex;margin-top:.9rem;font-weight:500;color:var(--ink);border-bottom:1px solid var(--accent)}
.prose .promo a{border-bottom-color:var(--accent)}
.toc-m{display:none}
.mbar{display:none}
.menu-extra{display:none}

@media (max-width:980px){
  .menu{inset:64px 0 0 0;height:calc(100dvh - 64px);overflow-y:auto;padding-top:var(--s-4)}
  .menu a{font-size:1.35rem;font-weight:500;padding-block:1.05rem}
  .menu-extra{display:block;border-bottom:0!important;padding-top:var(--s-6)}
  .menu-extra .btn{display:flex;width:100%;font-size:var(--t-md);min-height:54px}
  .menu-extra p{margin-top:var(--s-5);font-size:var(--t-sm);color:var(--muted);line-height:2}
  .menu-extra p a{display:inline;font-size:inherit;padding:0;color:var(--ink);font-weight:500}
  .nav{height:64px}
  .nav-open body{overflow:hidden}
}

@media (max-width:760px){
  :root{--t-md:1rem}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
  .section{padding-block:3.25rem}
  .section--tight{padding-block:2.25rem}
  .hero{padding-block:2.5rem 2.75rem}
  .hero h1{margin-bottom:var(--s-5)}
  .hero .lead{margin-bottom:var(--s-6);font-size:1.075rem}
  .hero-actions .btn{flex:1 1 auto}
  .hero-actions{gap:var(--s-4) var(--s-5)}
  .page-head{padding-block:2.25rem 2.25rem}
  .page-head h1{font-size:clamp(1.9rem,1.2rem + 3.6vw,2.4rem)}
  .crumbs{margin-bottom:var(--s-5)}
  .sh{margin-bottom:2rem;gap:var(--s-4)}
  .spec div{grid-template-columns:7.5rem 1fr;padding-block:.7rem}
  .brand img{height:26px}

  /* brand strip: compact */
  .brands a{min-height:112px;padding:1.1rem .75rem;gap:.5rem}
  .brands img{height:40px}

  /* cases */
  .case{padding-block:2.25rem;gap:1.5rem}
  .case h3,.case h2{font-size:1.75rem!important}
  .case-figure{aspect-ratio:16/10}
  .case.flip .case-figure,.case .case-figure{order:-1}
  .stats{gap:1.5rem;margin-block:1.25rem}

  /* horizontal rails */
  .rail{display:grid!important;grid-auto-flow:column;grid-template-columns:none!important;grid-auto-columns:minmax(78%,1fr);gap:0!important;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none;margin-inline:calc(var(--gutter)*-1);padding-inline:var(--gutter);scroll-padding-inline:var(--gutter);background:none!important;border:0!important}
  .rail::-webkit-scrollbar{display:none}
  .rail>*{scroll-snap-align:start;border-top:1px solid var(--ink)!important;border-inline-start:0!important;padding-inline:0 1.25rem!important;margin-inline-end:1rem}
  .rail>.card{background:transparent!important;padding-top:1.25rem}
  .rail>.step{padding-top:1.25rem}
  .posts.rail>.post{padding-top:1.25rem}
  .rail-hint{display:flex!important}
  .steps.rail{border-top:0}

  /* cards stacked tighter */
  .card{padding:1.35rem 1.25rem}

  /* figures */
  .figures b{font-size:2rem}

  /* FAQ */
  .faq summary{font-size:1.05rem;padding-block:1.1rem}

  /* article */
  .article-head{padding-block:2.25rem 1.5rem}
  .article-head h1{font-size:clamp(1.65rem,1.1rem + 3vw,2.2rem)}
  .prose{font-size:1.0625rem;line-height:1.95}
  .lede{font-size:1.15rem}
  .prose h2{margin-top:2em;padding-top:1em}
  .prose table{font-size:.875rem;min-width:540px}
  .table-wrap{margin-inline:calc(var(--gutter)*-1);padding-inline:var(--gutter)}
  .toc{display:none}
  .toc-m{display:block;margin-bottom:2rem;border-block:1px solid var(--ink);}
  .toc-m summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding-block:.9rem;font-weight:600;font-size:var(--t-sm)}
  .toc-m summary::-webkit-details-marker{display:none}
  .toc-m summary::after{content:"+";font-family:var(--f-mono);font-size:1.2rem;font-weight:400}
  .toc-m[open] summary::after{content:"−"}
  .toc-m ol{list-style:none;counter-reset:t;padding-bottom:.75rem}
  .toc-m li{counter-increment:t;border-top:1px solid var(--rule)}
  .toc-m a{display:flex;gap:.6rem;padding-block:.65rem;font-size:var(--t-sm);color:var(--ink-2)}
  .toc-m a::before{content:counter(t,decimal-leading-zero);font-family:var(--f-mono);font-size:var(--t-xs);color:var(--muted);padding-top:.15rem}
  .byline{gap:.25rem 1rem}
  .promo{padding:1.25rem 1.2rem}

  /* forms */
  .chip span{min-height:44px}
  .input,.select{min-height:52px;font-size:16px}
  .textarea{font-size:16px}
  .form .btn{width:100%}

  /* contact list */
  .contact-list li{grid-template-columns:5.5rem 1fr}

  /* CTA + footer */
  .cta{padding-block:3.5rem}
  .cta-actions .btn{flex:1 1 auto}
  .site-footer{padding-block:3rem 1.5rem}
  .foot-grid ul{gap:.15rem}
  .foot-grid a{display:inline-block;padding-block:.4rem}
  .legal{margin-top:2.5rem;flex-direction:column}

  /* bottom action bar replaces floating button */
  .wa-float{display:none}
  .mbar{display:grid;grid-template-columns:1fr 1fr 1.6fr;position:fixed;inset-inline:0;bottom:0;z-index:45;background:color-mix(in srgb,var(--paper) 96%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-top:1px solid var(--rule-strong);padding:.5rem .6rem calc(.5rem + env(safe-area-inset-bottom));gap:.5rem}
  .mbar a{display:flex;align-items:center;justify-content:center;gap:.45rem;min-height:46px;border-radius:var(--radius);font-size:var(--t-sm);font-weight:500;border:1px solid var(--rule-strong);color:var(--ink)}
  .mbar a.primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}
  .mbar svg{width:17px;height:17px}
  .nav-open .mbar{display:none}
}
.rail-hint{display:none;align-items:center;gap:.5rem;font-size:var(--t-xs);color:var(--muted);margin-top:1rem}
@media (max-width:380px){.mbar{grid-template-columns:1fr 1fr 1.3fr}.mbar a{font-size:.85rem}}
.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2.5rem}
.filters button{display:inline-flex;align-items:center;gap:.45rem;min-height:40px;padding:.35rem .95rem;border:1px solid var(--rule-strong);border-radius:var(--radius);background:transparent;font-size:var(--t-sm);cursor:pointer;color:var(--ink-2);transition:all .2s}
.filters button .num{font-size:var(--t-xs);color:var(--muted)}
.filters button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.filters button[aria-pressed="true"] .num{color:#A9ABBC}
.post[hidden]{display:none!important}
@media (max-width:760px){.filters{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-inline:calc(var(--gutter)*-1);padding-inline:var(--gutter);margin-bottom:1.75rem}.filters::-webkit-scrollbar{display:none}.filters button{flex:none}}
.split>*,.hero-grid>*,.sh>*,.case>*,.article-layout>*,.cta .grid>*{min-width:0}
@media (max-width:900px){.split,.hero-grid,.case,.sh{grid-template-columns:minmax(0,1fr)}}