/* Black & White Studio — shared styles for service pages
 * (/business-automation/, /android-app-development/, …).
 * Dark editorial look matching /case-studies/ and /blog/.
 */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:#0a0a0a;color:#d1d5db;line-height:1.7;-webkit-font-smoothing:antialiased;font-size:16.5px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.narrow{max-width:760px}

/* Header */
header.top{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:rgba(10,10,10,.85);border-bottom:1px solid #1f1f1f}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-family:'Sora',sans-serif;font-weight:800;font-size:17px;color:#fff;white-space:nowrap}
.brand img{width:32px;height:32px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:22px;font-size:14px;color:#9ca3af}
.nav-links a:hover{color:#fff}
.nav-links .nav-cta{background:#fff;color:#0a0a0a;font-weight:600;padding:8px 14px;border-radius:9px}
.nav-links .nav-cta:hover{background:#e5e7eb;color:#0a0a0a}
@media(max-width:760px){.nav-links a:not(.nav-cta){display:none}.brand span{display:none}}

/* Hero */
.hero{position:relative;padding:84px 0 64px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% -10% auto;height:640px;background:radial-gradient(ellipse at center,rgba(255,255,255,.08),transparent 62%);pointer-events:none}
.crumbs{font-size:13px;color:#6b7280;margin-bottom:22px}
.crumbs a:hover{color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:#9ca3af;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:999px;padding:6px 14px;margin-bottom:24px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:#25D366}
.hero h1{font-family:'Sora',sans-serif;font-size:clamp(34px,5.4vw,60px);font-weight:800;color:#fff;letter-spacing:-.025em;line-height:1.08;max-width:900px;margin:0 auto}
.hero h1 .soft{background:linear-gradient(135deg,#fff 0%,#9ca3af 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .lede{margin:22px auto 0;max-width:700px;color:#9ca3af;font-size:clamp(16px,2vw,19px);line-height:1.65}
.ctas{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.trust{margin-top:30px;font-size:13.5px;color:#6b7280}
.trust strong{color:#d1d5db;font-weight:600}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:15px;padding:14px 24px;border-radius:13px;transition:background .2s,transform .2s,border-color .2s}
.btn:hover{transform:translateY(-1px)}
.btn-wa{background:#25D366;color:#fff;box-shadow:0 6px 22px rgba(37,211,102,.25)}
.btn-wa:hover{background:#1ebe5b}
.btn-light{background:#fff;color:#0a0a0a}
.btn-light:hover{background:#e5e7eb}
.btn-ghost{background:rgba(255,255,255,.04);color:#fff;border:1px solid rgba(255,255,255,.15)}
.btn-ghost:hover{background:rgba(255,255,255,.09)}
.btn svg{flex-shrink:0}
@media(max-width:520px){.ctas .btn{width:100%}}

/* Sections */
section.block{padding:84px 0;border-top:1px solid #161616}
section.alt{background:#0d0d0d}
.kicker{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:#6b7280;margin-bottom:12px}
h2.title{font-family:'Sora',sans-serif;font-size:clamp(26px,3.6vw,40px);font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.15;max-width:760px}
.intro{margin-top:16px;color:#9ca3af;max-width:700px;font-size:17px}
.center{text-align:center}
.center h2.title,.center .intro{margin-left:auto;margin-right:auto}
.prose p{margin:0 0 18px}
.prose strong{color:#fff;font-weight:600}
.prose a,.inline-link{color:#fff;text-decoration:underline;text-underline-offset:3px;text-decoration-color:#4b5563}
.prose a:hover,.inline-link:hover{text-decoration-color:#fff}

/* Cards */
.grid{display:grid;gap:16px;margin-top:44px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g2,.g3{grid-template-columns:1fr}}
.card{background:#111;border:1px solid #222;border-radius:16px;padding:24px;transition:border-color .2s,background .2s}
a.card:hover{border-color:#3a3a3a;background:#141414}
.card .label{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:#6b7280;margin-bottom:8px}
.card h3{font-family:'Sora',sans-serif;font-size:18px;font-weight:700;color:#fff;line-height:1.35;margin-bottom:8px}
.card p{color:#9ca3af;font-size:15px;line-height:1.65}
.card .more{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:#fff}
.card .icon{width:40px;height:40px;border-radius:11px;background:rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:20px}
.card ul{margin:10px 0 0 18px;color:#9ca3af;font-size:14.5px}
.card li{margin-bottom:5px}

/* Proof feature */
.proof{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center;margin-top:44px;background:#101010;border:1px solid #232323;border-radius:20px;padding:36px}
.proof img{border-radius:12px;border:1px solid #2a2a2a}
.proof .badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:#fbbf24;margin-bottom:12px}
.proof h3{font-family:'Sora',sans-serif;font-size:24px;font-weight:800;color:#fff;line-height:1.25;margin-bottom:12px}
.proof p{color:#9ca3af;margin-bottom:14px}
.proof ul{margin:0 0 18px 18px;color:#d1d5db;font-size:15px}
.proof li{margin-bottom:6px}
@media(max-width:860px){.proof{grid-template-columns:1fr;padding:24px}}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px}
.stat{background:#111;border:1px solid #222;border-radius:14px;padding:22px 14px;text-align:center}
.stat .v{font-family:'Sora',sans-serif;font-size:28px;font-weight:800;color:#fff;line-height:1.1}
.stat .k{font-size:13px;color:#9ca3af;margin-top:6px}
@media(max-width:700px){.stats{grid-template-columns:1fr 1fr}}

/* Steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.steps{grid-template-columns:1fr}}
.step{position:relative;background:#111;border:1px solid #222;border-radius:16px;padding:24px 24px 24px 72px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:22px;width:34px;height:34px;border-radius:50%;background:#fff;color:#0a0a0a;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
.step h3{font-family:'Sora',sans-serif;font-size:17px;font-weight:700;color:#fff;margin-bottom:6px}
.step p{color:#9ca3af;font-size:15px}

/* Chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{font-size:13px;color:#d1d5db;background:#151515;border:1px solid #262626;border-radius:999px;padding:6px 12px}

/* FAQ */
.faq{margin-top:36px;border-top:1px solid #222}
.faq details{border-bottom:1px solid #222;padding:4px 0}
.faq summary{cursor:pointer;list-style:none;padding:18px 36px 18px 0;position:relative;font-weight:600;color:#fff;font-size:17px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:14px;font-size:24px;font-weight:400;color:#6b7280;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 0 20px;color:#9ca3af}
.faq .a p{margin-bottom:10px}

/* Final CTA */
.final{margin-top:0;text-align:center;background:radial-gradient(ellipse at top,rgba(37,211,102,.10),transparent 60%),#0d0d0d;border:1px solid #1f1f1f;border-radius:24px;padding:56px 24px}
.final h2{font-family:'Sora',sans-serif;font-size:clamp(26px,3.6vw,38px);font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.15}
.final p{color:#9ca3af;margin:14px auto 0;max-width:560px}
.final .small{font-size:13.5px;color:#6b7280;margin-top:18px}

/* Related + footer */
.related{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}
.related a{padding:10px 18px;border:1px solid #2a2a2a;border-radius:999px;font-size:14px;color:#e5e7eb;background:#111}
.related a:hover{border-color:#555}
footer.foot{border-top:1px solid #1f1f1f;padding:36px 0 96px;text-align:center;color:#6b7280;font-size:13.5px}
footer.foot a{color:#9ca3af}
footer.foot a:hover{color:#fff}
footer.foot .links{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;margin-bottom:12px}

/* Floating WhatsApp */
.wa-float{position:fixed;right:20px;bottom:20px;z-index:60;display:inline-flex;align-items:center;gap:10px;background:#25D366;color:#fff;font-weight:600;font-size:15px;padding:14px;border-radius:999px;box-shadow:0 8px 28px rgba(0,0,0,.35);transition:background .2s,transform .2s}
.wa-float:hover{background:#1ebe5b;transform:translateY(-2px)}
.wa-float span{display:none;padding-right:6px}
@media(min-width:768px){.wa-float{right:28px;bottom:28px;padding:14px 20px 14px 16px}.wa-float span{display:inline}}
@media print{.wa-float,header.top{display:none}}