/* ============================================================
   article.css — shared stylesheet for all /playbook/<slug> articles
   ahmedelflal.com · matches the site design system (tokens + nav + footer)
   Load order on every article: /css/tokens.css then /css/article.css
   ============================================================ */

:root{
  --color-bg:#080D1A; --color-surface:#0F1629; --color-surface-hi:#161F38;
  --color-teal:#00C4A7; --color-teal-dim:rgba(0,196,167,0.08); --color-teal-border:rgba(0,196,167,0.2);
  --color-gold:#E8A020; --color-gold-dim:rgba(232,160,32,0.1); --color-gold-border:rgba(232,160,32,0.2);
  --color-text:#E8EDF5; --color-text-muted:#8892A4; --color-border:#1E2D45;
  --color-article:#C2CCDB;
  --font-heading:'SK Concretica',system-ui,-apple-system,sans-serif;
  --font-body:'Inter',system-ui,-apple-system,sans-serif;
  --radius-sm:6px; --radius-md:12px; --radius-lg:20px;
  --container-max:1200px; --reading-max:760px;
  --container-pad:clamp(20px,5vw,80px);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}

.skip-link{position:absolute;top:-48px;left:16px;background:var(--color-teal);color:#000;padding:10px 20px;font-weight:700;font-size:.875rem;border-radius:0 0 var(--radius-sm) var(--radius-sm);z-index:300;transition:top .2s;}
.skip-link:focus{top:0;}

/* buttons */
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--color-teal);color:#000;font-weight:700;font-size:.9rem;padding:14px 28px;border-radius:var(--radius-sm);border:none;cursor:pointer;transition:background .2s,transform .15s,box-shadow .2s;white-space:nowrap;}
.btn-primary:hover{background:#00A896;transform:scale(1.02);box-shadow:0 6px 24px rgba(0,196,167,.25);}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--color-text);font-weight:600;font-size:.9rem;padding:13px 28px;border-radius:var(--radius-sm);border:1px solid var(--color-border);cursor:pointer;transition:border-color .2s,color .2s;white-space:nowrap;}
.btn-secondary:hover{border-color:var(--color-teal);color:var(--color-teal);}
.btn-sm{padding:10px 18px;font-size:.85rem;}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(8,13,26,.45);backdrop-filter:blur(28px) saturate(180%);-webkit-backdrop-filter:blur(28px) saturate(180%);border-bottom:1px solid rgba(255,255,255,.07);box-shadow:0 1px 0 rgba(0,196,167,.06);transition:background .35s,border-color .35s;}
.nav.scrolled{background:rgba(8,13,26,.92);border-color:var(--color-border);box-shadow:0 4px 24px rgba(0,0,0,.3);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-pad);}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1rem;color:var(--color-text);flex-shrink:0;}
.nav-logo-mark{width:36px;height:36px;border-radius:8px;overflow:hidden;}
.nav-logo-mark img{width:100%;height:100%;object-fit:contain;}
.nav-links{display:none;list-style:none;gap:32px;align-items:center;}
@media(min-width:800px){.nav-links{display:flex;}}
.nav-links a{font-size:.875rem;color:var(--color-text-muted);transition:color .2s;font-weight:500;position:relative;}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:1px;background:var(--color-teal);transition:width .2s ease;}
.nav-links a:hover{color:var(--color-teal);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--color-teal);}
.nav-links a.active::after{width:100%;}
.nav-cta{display:none;}
@media(min-width:800px){.nav-cta{display:inline-flex;}}
.nav-hamburger{display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;border-radius:var(--radius-sm);}
@media(min-width:800px){.nav-hamburger{display:none;}}
.nav-hamburger span{display:block;width:22px;height:2px;background:var(--color-text);border-radius:2px;transition:transform .25s,opacity .25s;}
.nav-hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0);}
.nav-hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-mobile{display:none;position:fixed;top:72px;left:0;right:0;bottom:0;background:var(--color-bg);z-index:99;padding:40px var(--container-pad);flex-direction:column;overflow-y:auto;}
.nav-mobile.open{display:flex;}
.nav-mobile a{display:block;font-size:1.375rem;font-weight:600;color:var(--color-text);padding:20px 0;border-bottom:1px solid var(--color-border);}
.nav-mobile a:last-of-type{border-bottom:none;}
.nav-mobile .btn-primary{margin-top:32px;width:100%;justify-content:center;font-size:1rem;padding:18px;}

/* layout */
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--container-pad);}
.reading{max-width:var(--reading-max);margin:0 auto;}

/* breadcrumb */
.breadcrumb{padding-top:104px;}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;font-size:.8rem;color:var(--color-text-muted);}
.breadcrumb a{color:var(--color-text-muted);transition:color .2s;}
.breadcrumb a:hover{color:var(--color-teal);}
.breadcrumb li+li::before{content:'/';margin-right:8px;color:var(--color-border);}

/* article hero */
.art-hero{padding:28px 0 8px;}
.art-eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;padding:6px 12px;border-radius:999px;margin-bottom:20px;}
.art-eyebrow.lead-gen{background:rgba(0,196,167,.12);color:var(--color-teal);}
.art-eyebrow.copywriting{background:rgba(232,160,32,.12);color:var(--color-gold);}
.art-eyebrow.media-buying{background:rgba(100,140,240,.12);color:#7BA8F0;}
.art-eyebrow.systems{background:rgba(168,85,247,.12);color:#D8B4FE;}
.art-eyebrow.strategy{background:rgba(34,197,94,.12);color:#86EFAC;}
.art-title{font-family:var(--font-heading);font-size:clamp(2rem,4.5vw,3.2rem);font-weight:700;line-height:1.14;color:var(--color-text);margin-bottom:22px;}
.art-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:.88rem;color:var(--color-text-muted);}
.art-meta .author{display:flex;align-items:center;gap:10px;color:var(--color-text);font-weight:600;}
.art-meta .author img{width:34px;height:34px;border-radius:50%;}
.art-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--color-border);}

/* takeaway / snippet box (AI-overview answer) */
.art-takeaway{background:var(--color-teal-dim);border:1px solid var(--color-teal-border);border-radius:var(--radius-md);padding:22px 26px;margin:32px 0;}
.art-takeaway strong{color:var(--color-teal);display:block;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px;}
.art-takeaway p{color:var(--color-text);font-size:1.05rem;line-height:1.7;}

/* body typography */
.art-body{padding:8px 0 40px;font-size:1.06rem;line-height:1.8;color:var(--color-article);}
.art-body h2{font-family:var(--font-heading);font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--color-text);line-height:1.25;margin:48px 0 18px;scroll-margin-top:90px;}
.art-body h3{font-size:1.25rem;font-weight:700;color:var(--color-text);margin:32px 0 12px;}
.art-body p{margin-bottom:22px;}
.art-body a{color:var(--color-teal);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.art-body a:hover{color:#00A896;}
.art-body strong{color:var(--color-text);font-weight:700;}
.art-body ul,.art-body ol{margin:0 0 22px 22px;}
.art-body li{margin-bottom:10px;}
.art-body blockquote{border-left:3px solid var(--color-teal);background:var(--color-surface);padding:18px 24px;margin:28px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--color-text);font-size:1.08rem;}
.art-body code{font-family:ui-monospace,Menlo,monospace;background:var(--color-surface-hi);padding:2px 7px;border-radius:4px;font-size:.92em;color:var(--color-teal);}
.art-divider{height:1px;background:var(--color-border);margin:44px 0;border:none;}

/* FAQ */
.faq{padding:40px 0;}
.faq h2{font-family:var(--font-heading);font-size:clamp(1.6rem,3vw,2.1rem);font-weight:700;color:var(--color-text);margin-bottom:24px;}
.faq-item{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:22px 24px;margin-bottom:14px;background:var(--color-surface);}
.faq-item h3{font-size:1.08rem;font-weight:700;color:var(--color-text);margin-bottom:10px;}
.faq-item p{font-size:1rem;line-height:1.75;color:var(--color-article);}

/* sources */
.sources{padding:32px 0;}
.sources h2{font-family:var(--font-heading);font-size:1.4rem;font-weight:700;color:var(--color-text);margin-bottom:16px;}
.sources ol{margin-left:20px;color:var(--color-text-muted);font-size:.92rem;line-height:1.8;}
.sources a{color:var(--color-teal);text-decoration:underline;text-underline-offset:2px;}

/* author box */
.author-box{display:flex;gap:20px;align-items:flex-start;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:28px;margin:40px 0;}
.author-box img{width:64px;height:64px;border-radius:50%;flex-shrink:0;}
.author-box .name{font-weight:700;color:var(--color-text);font-size:1.05rem;margin-bottom:6px;}
.author-box .bio{font-size:.95rem;color:var(--color-text-muted);line-height:1.7;}
.author-box .bio a{color:var(--color-teal);}

/* related */
.related{padding:40px 0;}
.related h2{font-family:var(--font-heading);font-size:1.4rem;font-weight:700;color:var(--color-text);margin-bottom:20px;}
.related-grid{display:grid;grid-template-columns:1fr;gap:16px;}
@media(min-width:700px){.related-grid{grid-template-columns:repeat(3,1fr);}}
.related-card{display:block;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;background:var(--color-surface);transition:border-color .2s,transform .2s;}
.related-card:hover{border-color:var(--color-teal);transform:translateY(-2px);}
.related-card .tag{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);font-weight:700;}
.related-card .t{font-weight:700;color:var(--color-text);margin-top:8px;line-height:1.4;font-size:.98rem;}

/* CTA */
.art-cta{background:linear-gradient(145deg,var(--color-surface),var(--color-bg));border:1px solid var(--color-teal-border);border-radius:var(--radius-lg);padding:clamp(32px,5vw,56px);margin:48px 0;text-align:center;}
.art-cta h2{font-family:var(--font-heading);font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;color:var(--color-text);margin-bottom:14px;}
.art-cta p{color:var(--color-text-muted);max-width:520px;margin:0 auto 28px;line-height:1.7;}
.art-cta .btn-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* footer */
.footer{background:linear-gradient(145deg,rgba(12,18,36,.8),var(--color-bg));border-top:1px solid var(--color-border);padding:80px 0 40px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:60px;margin-bottom:60px;}
@media(min-width:900px){.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:80px;}}
.footer-logo-row{display:flex;align-items:center;gap:12px;margin-bottom:20px;font-weight:700;font-size:1rem;color:var(--color-text);}
.footer-tagline{font-size:.95rem;color:var(--color-text-muted);line-height:1.7;max-width:300px;margin-bottom:24px;}
.footer-social{display:flex;gap:16px;}
.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-muted);font-size:.85rem;font-weight:700;transition:border-color .2s,color .2s;}
.footer-social a:hover{border-color:var(--color-teal);color:var(--color-teal);}
.footer-col-label{font-family:var(--font-heading);font-size:.9rem;font-weight:700;color:var(--color-text);text-transform:uppercase;letter-spacing:.05em;margin-bottom:20px;}
.footer-links{list-style:none;}
.footer-links li{margin-bottom:14px;}
.footer-links a{font-size:.95rem;color:var(--color-text-muted);transition:color .2s;}
.footer-links a:hover{color:var(--color-teal);}
.footer-bottom{border-top:1px solid var(--color-border);padding-top:40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;}
.footer-copy,.footer-proof{font-size:.85rem;color:var(--color-text-muted);}

/* whatsapp float */
.wa-float{position:fixed;bottom:32px;right:32px;width:56px;height:56px;background:#25D366;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 24px rgba(37,211,102,.3);transition:transform .2s,box-shadow .2s;z-index:50;}
.wa-float:hover{transform:scale(1.1);box-shadow:0 8px 32px rgba(37,211,102,.4);}
.wa-float svg{width:28px;height:28px;fill:#fff;}
@media(max-width:640px){.wa-float{width:48px;height:48px;bottom:24px;right:24px;}.wa-float svg{width:24px;height:24px;}}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;}}

.related-card .teaser{font-size:.82rem;color:var(--color-text-muted);margin-top:6px;line-height:1.5;}
.footer-logo-row img{height:30px;width:auto;}

/* framework diagram figure */
.art-figure{margin:34px 0;border:1px solid var(--color-border);border-radius:14px;overflow:hidden;background:var(--color-surface);}
.art-figure img{display:block;width:100%;height:auto;}
.art-figure figcaption{padding:10px 16px;font-size:.82rem;color:var(--color-text-muted);text-align:center;line-height:1.5;}