/* KSM Digital Systems — Apple-inspired design system.
   System SF/Segoe/Roboto font stack (no web-font dependency), blue pills,
   chevron text links, slim translucent nav, full-width showcase panels. */
:root{
  --bg:#ffffff;--bg-alt:#f5f5f7;--ink:#1d1d1f;--muted:#6e6e73;--muted-2:#86868b;
  --blue:#0071e3;--blue-hover:#0077ed;--blue-link:#0066cc;--line:#d2d2d7;--line-soft:#e8e8ed;
  --dark:#101112;--mint:#1f7a54;--coral:#e8532f;
  --radius:18px;--radius-lg:28px;--radius-pill:980px;
  --container:1024px;--container-wide:1200px;
  --font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:60px;overflow-x:clip;width:100%;max-width:100%;overscroll-behavior:none;background:var(--bg)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;width:100%;max-width:100%;overflow-x:clip;overscroll-behavior:none;background:var(--bg);color:var(--ink);font-family:var(--font-sans);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;letter-spacing:.004em}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--blue-link);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .4em;color:var(--ink);letter-spacing:-.015em;line-height:1.06;font-weight:600}
h1{font-size:clamp(2.6rem,6vw,3.75rem)}
h2{font-size:clamp(2rem,4.4vw,3rem)}
h3{font-size:clamp(1.25rem,2vw,1.6rem);letter-spacing:-.01em}
p{margin:0 0 1em}
ul{margin:0 0 1em;padding-left:1.2em}
li{margin:.35em 0}
strong{font-weight:600}
.mono{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:12px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.container{width:min(var(--container),100% - 2*clamp(20px,5vw,44px));margin-inline:auto}
.container-wide{width:min(var(--container-wide),100% - 2*clamp(20px,5vw,44px));margin-inline:auto}
.section{padding:clamp(56px,9vw,110px) 0}
.bg-alt{background:var(--bg-alt)}
.bg-dark{background:var(--dark);color:#f5f5f7}
.lead{font-size:clamp(1.15rem,1.8vw,1.45rem);color:var(--muted);font-weight:500;line-height:1.4}

/* Chevron text links (Apple "Learn more ›") */
.link-chevron{color:var(--blue-link);font-size:clamp(1rem,1.3vw,1.22rem);font-weight:400;display:inline-flex;align-items:center;gap:2px}
.link-chevron::after{content:" ›";font-weight:400}
.link-chevron:hover{text-decoration:underline}

/* Buttons — Apple pill */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:11px 22px;border-radius:var(--radius-pill);font-weight:400;font-size:1.06rem;line-height:1;cursor:pointer;border:1px solid transparent;transition:background .2s ease,color .2s ease,opacity .2s ease;text-decoration:none}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-hover);color:#fff}
.btn-ghost{background:transparent;color:var(--blue-link);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--muted-2);color:var(--blue-link)}
.btn-whatsapp{background:#25d366;color:#053a1c}
.btn-whatsapp:hover{background:#20c25c;color:#053a1c}
.btn-ondark{background:#fff;color:var(--ink)}
.btn-ondark:hover{background:#e9e9ec;color:var(--ink)}
.btn svg{width:19px;height:19px;flex:none}

/* Header — slim translucent */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.nav{display:flex;align-items:center;gap:18px;min-height:52px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:600;color:var(--ink);font-size:1.02rem;letter-spacing:-.01em}
.brand:hover{text-decoration:none}
.brand-mark{width:28px;height:28px;border-radius:7px;background:var(--ink);color:#fff;display:grid;place-items:center;font-family:var(--font-mono);font-weight:700;font-size:.9rem}
.brand b{font-weight:600}
.brand i{font-style:normal;font-weight:400;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{color:var(--ink);font-weight:400;font-size:.86rem;padding:8px 12px;border-radius:8px;min-height:38px;display:inline-flex;align-items:center;opacity:.86}
.nav-links a:hover{opacity:1;text-decoration:none}
.nav-links a[aria-current="page"]{opacity:1;color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:10px}
.lang-switch{display:inline-flex;border:1px solid var(--line);border-radius:var(--radius-pill);overflow:hidden}
.lang-switch a{padding:6px 11px;font-size:.78rem;font-weight:500;color:var(--muted);min-height:34px;display:inline-flex;align-items:center}
.lang-switch a:hover{text-decoration:none;color:var(--ink)}
.lang-switch a[aria-current="true"]{background:var(--ink);color:#fff}
.nav-cta .btn{min-height:36px;padding:7px 16px;font-size:.9rem}
.menu-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.6);cursor:pointer;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.menu-toggle span{width:19px;height:1.5px;background:var(--ink);border-radius:2px;transition:.2s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* Showcase — centered Apple hero moment */
.showcase{text-align:center;padding:clamp(64px,10vw,128px) 0}
.showcase .eyebrow-t{font-size:clamp(1rem,1.4vw,1.35rem);font-weight:600;color:var(--blue-link);margin:0 0 .35em}
.showcase h1,.showcase h2{max-width:16ch;margin-inline:auto}
.showcase h1{font-size:clamp(2.9rem,7vw,4.6rem);letter-spacing:-.02em}
.showcase .sub{font-size:clamp(1.25rem,2.6vw,1.9rem);color:var(--ink);font-weight:500;max-width:34ch;margin:.2em auto 0;line-height:1.28}
.showcase .sub.muted{color:var(--muted)}
.links{display:flex;flex-wrap:wrap;gap:14px 28px;justify-content:center;align-items:center;margin-top:26px}
.section-center{text-align:center;max-width:800px;margin:0 auto}
.page-intro{text-align:center;max-width:820px;margin:0 auto}
.eyebrow{display:inline-block;font-weight:600;color:var(--blue-link);margin-bottom:12px}

/* Tiles */
.tiles-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.tile{background:var(--bg-alt);border-radius:var(--radius-lg);padding:clamp(32px,5vw,56px);text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px;min-height:340px;justify-content:center}
.tile.tile-dark{background:var(--dark);color:#f5f5f7}
.tile.tile-dark h3,.tile.tile-dark h2{color:#fff}
.tile h3{font-size:clamp(1.5rem,2.6vw,2rem)}
.tile p{color:var(--muted);max-width:30ch;margin:.2em 0 0}
.tile.tile-dark p{color:#b8b8be}

/* Cards / grids */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{background:var(--bg);border:1px solid var(--line-soft);border-radius:var(--radius);padding:clamp(24px,3vw,32px);display:flex;flex-direction:column;gap:10px;height:100%}
.bg-alt .card{background:#fff}
.card .num{font-family:var(--font-mono);color:var(--muted-2);font-weight:700;font-size:.82rem}
.card h3{margin:0}
.card p{margin:0;color:var(--muted)}
.card-link{color:var(--blue-link);font-weight:400;margin-top:auto;display:inline-flex;align-items:center;gap:4px}

/* Work cards */
.work-card{overflow:hidden;padding:0}
.work-thumb{aspect-ratio:16/10;background:linear-gradient(150deg,#e8eefc,#f3e9ff 55%,#ffeee7);display:grid;place-items:center;position:relative}
.work-thumb .mono{color:#5b6270;opacity:.8}
.work-body{padding:clamp(22px,3vw,28px);display:flex;flex-direction:column;gap:9px}
.badge{align-self:flex-start;font-family:var(--font-mono);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;padding:5px 10px;border-radius:var(--radius-pill);font-weight:700}
.badge-live{background:#e3f5ec;color:#1f7a54}
.badge-dev{background:#fbe9e2;color:#b5361f}
.badge-soon{background:#e7effb;color:#0c447c}

.step .num{font-family:var(--font-mono);color:var(--blue-link);font-weight:700}

/* Dark contact panel */
.panel{background:var(--dark);color:#f5f5f7;border-radius:var(--radius-lg);padding:clamp(44px,7vw,88px) clamp(24px,5vw,48px);text-align:center}
.panel h2{color:#fff;max-width:18ch;margin-inline:auto}
.panel .lead{color:#b8b8be;max-width:40ch;margin:.4em auto 0}
.panel .links,.panel .contact-actions{justify-content:center;margin-top:26px}

/* Trust strip */
.trust{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.trust-row{display:flex;flex-wrap:wrap;gap:8px 26px;align-items:center;justify-content:center;padding:20px 0;color:var(--muted);font-weight:400;font-size:.92rem;text-align:center}
.trust-row span{display:inline-flex;align-items:center;gap:8px}
.trust-row .dot{width:5px;height:5px;border-radius:50%;background:var(--muted-2)}

.contact-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:10px}
.contact-list{list-style:none;padding:0;margin:20px 0 0}
.contact-list li{display:flex;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--line-soft)}
.contact-list li:first-child{border-top:0}
.contact-list a{font-weight:500}
.hero-card{background:var(--bg-alt);border-radius:var(--radius-lg);padding:clamp(26px,4vw,40px)}
.hero-card h2{font-size:1.3rem;margin-bottom:10px}
.hero-card ul{list-style:none;padding:0;margin:0}
.hero-card li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--line);color:var(--ink)}
.hero-card li:first-child{border-top:0}
.tick{color:var(--mint);font-weight:700;flex:none}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,56px);align-items:center}

/* Article */
.article{max-width:720px;margin-inline:auto}
.article h1{font-size:clamp(2.2rem,4.4vw,3rem)}
.article h2{margin-top:1.6em;font-size:clamp(1.4rem,2.4vw,1.9rem)}
.article h3{margin-top:1.3em}
.note{background:var(--bg-alt);border:1px solid var(--line);border-radius:14px;padding:16px 18px;color:var(--muted);font-size:.98rem}

/* Footer — Apple small print */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:clamp(36px,5vw,52px) 0 28px;font-size:.8rem;color:var(--muted-2)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.footer-brand .brand{font-size:.95rem}
.footer-brand p{color:var(--muted-2);max-width:36ch;margin-top:10px;font-size:.8rem;line-height:1.5}
.footer-col h4{font-size:.78rem;font-weight:600;color:var(--ink);margin:0 0 10px}
.footer-col a{display:block;color:var(--muted);padding:5px 0;font-weight:400;font-size:.8rem}
.footer-col a:hover{color:var(--ink)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:space-between;align-items:center;margin-top:18px;color:var(--muted-2);font-size:.78rem}
.footer-bottom a{color:var(--muted-2)}
.credit a{color:var(--coral);font-weight:500;text-decoration:underline}

/* Reveal (enhancement only) */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}}

@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .tiles-2{grid-template-columns:1fr}
}
@media (max-width:680px){
  .nav-links,.nav .lang-switch,.nav-cta .btn{display:none}
  .menu-toggle{display:flex}
  .nav-menu-open .nav-links{display:flex;position:absolute;left:0;right:0;top:52px;flex-direction:column;align-items:stretch;background:rgba(255,255,255,.96);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);padding:10px 5vw 18px;gap:2px}
  .nav-menu-open .nav-links a{padding:14px 12px;font-size:1rem;opacity:1}
  .nav-menu-open .lang-switch{display:inline-flex;margin:10px 5vw 0}
  .grid-2{grid-template-columns:1fr}
  .links .btn{width:100%}
}