/* ============================================================
   The Clean Sheet — shared article stylesheet
   Matches the main Sparkobot site (brand tokens, nav, footer).
   Used by every article page in /the-clean-sheet/.
   ============================================================ */

:root{
  --navy:#1A6BBF; --navy-dark:#060D1A; --navy-mid:#0E1F3D;
  --amber:#00A896; --amber-dk:#007A6C;
  --cta:#F5A623; --cta-dk:#D4880A;
  --white:#FFFFFF; --grey-lt:#F0F4F8; --grey-md:#CBD5E0; --grey-dk:#4A5568;
  --text:#0D1117; --green:#1D9E75;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}

/* ---- top navigation (identical to site) ---- */
nav{position:fixed;top:0;left:0;right:0;height:64px;background:rgba(6,13,26,0.97);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:space-between;padding:0 40px;z-index:100}
.nav-logo{display:flex;align-items:center;gap:10px;cursor:pointer;text-decoration:none}
.nav-wordmark{font-size:20px;font-weight:500;color:#fff;letter-spacing:-0.3px}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{text-decoration:none;color:rgba(255,255,255,0.6);font-size:14px;cursor:pointer;transition:color .2s}
.nav-links a:hover{color:var(--amber)}
.nav-right{display:flex;gap:12px;align-items:center}
.nav-phone{font-size:13px;color:rgba(255,255,255,0.5);font-weight:500;text-decoration:none}
.nav-cta{background:var(--cta);color:var(--white);border:none;padding:9px 20px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;font-family:var(--font);transition:background .2s;text-decoration:none;display:inline-block}
.nav-cta:hover{background:var(--cta-dk)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 26px;border-radius:7px;font-size:15px;font-weight:500;cursor:pointer;border:none;font-family:var(--font);text-decoration:none;transition:all .2s;gap:6px}
.btn-primary{background:var(--navy);color:var(--white)}
.btn-primary:hover{background:var(--navy-dark)}
.btn-ghost{background:none;border:1.5px solid var(--grey-md);color:var(--navy-dark)}
.btn-ghost:hover{border-color:var(--navy)}

/* ---- article header ---- */
.article-head{padding:104px 24px 0;background:linear-gradient(180deg,#0A1628,#060D1A)}
.article-head-inner{max-width:760px;margin:0 auto;padding-bottom:48px;text-align:center}
.a-tag{display:inline-block;font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--navy-dark);background:var(--amber);padding:5px 12px;border-radius:100px;margin-bottom:20px}
.a-tag.blue{background:#5BA8E8}
.a-tag.grey{background:var(--grey-md)}
.article-head h1{font-size:40px;font-weight:500;color:#fff;letter-spacing:-1.2px;line-height:1.15;margin-bottom:18px}
.a-meta{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,0.55)}
.a-meta time{color:rgba(255,255,255,0.55)}

/* ---- hero image ---- */
.article-hero-img{max-width:960px;margin:-32px auto 0;padding:0 24px}
.article-hero-img img{width:100%;border-radius:14px;border:1px solid var(--grey-md);box-shadow:0 18px 50px rgba(6,13,26,0.18)}

/* ---- article body (prose) ---- */
.article-body{max-width:680px;margin:48px auto 0;padding:0 24px 72px;font-size:17px;line-height:1.8;color:#1C2733}
.article-body > p{margin-bottom:24px}
.article-body h2{font-size:26px;font-weight:500;color:var(--navy-dark);letter-spacing:-0.5px;margin:44px 0 16px;line-height:1.25}
.article-body h3{font-size:20px;font-weight:500;color:var(--navy-dark);margin:32px 0 12px}
.article-body ul,.article-body ol{margin:0 0 24px 22px}
.article-body li{margin-bottom:10px}
.article-body a{color:var(--amber-dk);text-decoration:underline;text-underline-offset:2px}
.article-body a:hover{color:var(--amber)}
.article-body blockquote{border-left:3px solid var(--amber);background:var(--grey-lt);padding:18px 22px;border-radius:0 8px 8px 0;margin:0 0 24px;font-size:18px;color:var(--navy-dark)}
.article-body strong{font-weight:600;color:var(--navy-dark)}
.article-lead{font-size:20px;line-height:1.7;color:var(--grey-dk);margin-bottom:32px}

/* ---- key spec / callout box ---- */
.a-callout{background:var(--navy-mid);color:#fff;border-radius:12px;padding:26px 28px;margin:0 0 28px}
.a-callout h3{color:#fff;margin:0 0 10px;font-size:18px}
.a-callout p{color:rgba(255,255,255,0.8);font-size:15px;margin:0}

/* ---- end CTA ---- */
.article-cta{max-width:680px;margin:0 auto 72px;padding:0 24px}
.article-cta-card{background:var(--grey-lt);border:1px solid var(--grey-md);border-radius:14px;padding:32px;text-align:center}
.article-cta-card h3{font-size:22px;font-weight:500;color:var(--navy-dark);margin-bottom:10px}
.article-cta-card p{color:var(--grey-dk);font-size:15px;margin-bottom:20px}
.article-cta-card .btn{margin:5px}

/* ---- back link ---- */
.article-back{max-width:680px;margin:0 auto;padding:90px 24px 0}
.article-back a{font-size:14px;color:var(--amber-dk);text-decoration:none;font-weight:500}
.article-back a:hover{color:var(--amber)}

/* ---- footer (identical to site) ---- */
footer{background:var(--navy-dark);padding:60px 48px 28px}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,0.08);margin-bottom:28px}
.footer-logo{display:flex;align-items:center;gap:8px}
.footer-brand .nav-wordmark,.footer-logo span{color:#fff;font-size:19px;font-weight:500}
.footer-brand p{color:rgba(255,255,255,0.5);font-size:14px;line-height:1.7;margin:14px 0}
.footer-brand a{color:rgba(255,255,255,0.7);font-size:14px;text-decoration:none}
.footer-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.07);border:1px solid rgba(255,255,255,0.12);border-radius:100px;padding:6px 14px;font-size:12px;color:rgba(255,255,255,0.6);margin-top:14px}
.footer-col h4{font-size:11px;font-weight:500;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,0.3);margin-bottom:16px;margin-top:0}
.footer-col h4+ul{margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:14px;color:rgba(255,255,255,0.6);text-decoration:none;cursor:pointer;transition:color .2s}
.footer-col a:hover{color:var(--white)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom p{color:rgba(255,255,255,0.35);font-size:13px}
.footer-bottom>div{display:flex;gap:18px}
.footer-bottom a{color:rgba(255,255,255,0.45);font-size:13px;text-decoration:none}
.footer-bottom a:hover{color:#fff}

/* ---- responsive ---- */
@media(max-width:768px){
  nav{padding:0 20px}
  .nav-links{display:none}
  .nav-cta,.nav-phone{display:none}
  .article-head h1{font-size:28px;letter-spacing:-0.5px}
  .article-body{font-size:16px}
  .article-body h2{font-size:22px}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}

/* keep demo CTA reachable on phones for content pages */
@media(max-width:768px){
  .nav-cta{display:inline-block !important;padding:7px 14px;font-size:13px}
  [style*="grid-template-columns"]{grid-template-columns:1fr !important}
  .article-head{padding-top:96px}
}

/* ---- mobile menu (content pages) ---- */
.nav-burger{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-burger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:transform .25s,opacity .25s}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{position:fixed;top:64px;left:0;right:0;background:rgba(6,13,26,0.98);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,0.1);display:none;flex-direction:column;padding:10px 0 18px;z-index:99}
.mobile-menu.open{display:flex}
.mobile-menu a{color:rgba(255,255,255,0.85);text-decoration:none;font-size:16px;padding:15px 24px;border-bottom:1px solid rgba(255,255,255,0.06)}
.mobile-menu a:hover{background:rgba(255,255,255,0.06);color:var(--amber)}
.mobile-menu .mm-cta{background:var(--cta);color:#fff;margin:14px 24px 0;padding:14px;border-radius:7px;text-align:center;font-weight:500}
@media(min-width:769px){.mobile-menu{display:none !important}.nav-burger{display:none}}
@media(max-width:768px){.nav-burger{display:flex}html,body{overflow-x:hidden}}

/* Quick answer box — concise, extractable summary for AI search engines and featured snippets */
.a-answer{background:var(--grey-lt);border-left:4px solid var(--amber,#00A896);border-radius:8px;padding:18px 22px;margin:0 0 30px;font-size:16px;line-height:1.65;color:var(--text,#0D1117)}
.a-answer strong{color:var(--navy-dark,#060D1A)}

/* ---- cookie consent banner (copied from main styles.css so it renders correctly on article pages) ---- */
.cookie-banner {position:fixed;left:0;right:0;bottom:0;z-index:1000;background:#060D1A;color:rgba(255,255,255,0.95);padding:18px 22px;box-shadow:0 -4px 24px rgba(0,0,0,0.25);transform:translateY(110%);transition:transform 0.3s ease;}
.cookie-banner.show {transform:translateY(0);}
.cookie-inner {max-width:1160px;margin:0 auto;display:flex;align-items:center;gap:20px;flex-wrap:wrap;justify-content:space-between;}
.cookie-text {font-size:13.5px;line-height:1.6;flex:1 1 460px;min-width:260px;}
.cookie-text a {color:#F5A623;text-decoration:underline;}
.cookie-text strong {display:block;margin-bottom:4px;}
.cookie-actions {display:flex;gap:10px;flex-wrap:wrap;}
.ck-btn {font-family:inherit;font-size:13.5px;font-weight:500;border-radius:7px;padding:11px 20px;cursor:pointer;border:1px solid rgba(255,255,255,0.85);background:transparent;color:#fff;min-width:170px;text-align:center;}
.ck-btn:hover {background:rgba(255,255,255,0.08);}
.ck-btn.ck-accept {background:transparent;color:#fff;border-color:rgba(255,255,255,0.85);}
.ck-btn.ck-reject {background:transparent;color:#fff;border-color:rgba(255,255,255,0.85);}
.ck-link {background:none;border:none;color:#F5A623;text-decoration:underline;cursor:pointer;font:inherit;padding:0;}
@media(max-width:640px){.cookie-inner{flex-direction:column;align-items:stretch;}.ck-btn{flex:1;min-width:0;}}
.footer-cookie-settings {background:none;border:none;color:rgba(255,255,255,0.7);cursor:pointer;font-size:13px;padding:0;text-decoration:underline;}
.footer-cookie-settings:hover {color:#fff;}