/* ============================================================
   Nuno Costa; Blog engine shared stylesheet (hub + articles)
   Single source of truth for the blog design system.
   ============================================================ */
:root{
  --paper:#FAFAF8; --ink:#0A0A0A; --acc:#FF4D00; --line:#E5E5DF; --mute:#6E6E67;
  --f-disp:'Clash Display',sans-serif; --f-serif:'Instrument Serif',serif; --f-mono:'JetBrains Mono',monospace;
  --pad:clamp(1.25rem,4vw,2.5rem);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
body{background:var(--paper);color:var(--ink);font-family:var(--f-disp);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--acc);color:var(--paper)}
::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--paper)}::-webkit-scrollbar-thumb{background:var(--line);border-radius:5px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
.noise{position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.05;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E")}
.serif-em{font-family:var(--f-serif);font-style:italic;font-weight:400;letter-spacing:-.01em}
.dot-acc{color:var(--acc)}
main{position:relative;z-index:2}
#progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--acc);z-index:60;transition:width .1s linear}

/* ---------- header ---------- */
.hdr{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
.hdr.scrolled{background:rgba(250,250,248,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-color:var(--line)}
.hdr-in{max-width:1200px;margin:0 auto;padding:1rem var(--pad);display:flex;align-items:center;justify-content:space-between;gap:1rem}
.logo{font-family:var(--f-disp);font-weight:600;font-size:1.15rem;letter-spacing:-.01em;z-index:2}
.logo span{color:var(--acc)}
.hdr-right{display:flex;align-items:center;gap:.75rem}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang a{display:block;background:transparent;color:var(--mute);font-family:var(--f-mono);font-size:.65rem;letter-spacing:.08em;padding:.45rem .7rem;transition:color .2s,background .2s}
.lang a.active{background:var(--ink);color:var(--paper)}
.lang a:not(.active):hover{color:var(--ink)}
.lang a:focus-visible{outline:2px solid var(--acc);outline-offset:-2px}
.nav-cta{background:var(--acc);color:var(--paper);border:1px solid var(--acc);border-radius:999px;padding:.55rem 1.1rem;font-family:var(--f-mono);font-size:.625rem;letter-spacing:.12em;text-transform:uppercase;transition:background .25s,border-color .25s;white-space:nowrap}
.nav-cta:hover{background:var(--ink);border-color:var(--ink)}

/* ---------- hero (hub) ---------- */
.hero{position:relative;min-height:72vh;display:flex;align-items:center;padding:8.5rem var(--pad) 4.5rem}
.hero-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:calc(100%/6) 100%;opacity:.5}
.hero-in{max-width:1200px;margin:0 auto;position:relative;width:100%}
.hero-label{font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.15em;text-transform:uppercase;color:var(--acc);display:flex;align-items:center;gap:.75rem;margin-bottom:1.75rem}
.hero-label::after{content:"";height:1px;width:64px;background:var(--acc)}
h1.hero-title{font-size:clamp(2.6rem,6.5vw,5rem);font-weight:500;letter-spacing:-.025em;line-height:1.04;max-width:16ch}
.hero-sub{margin-top:2rem;max-width:56ch;font-size:clamp(1rem,1.4vw,1.15rem);color:var(--mute);line-height:1.65}
.hero-ctas{margin-top:3rem;display:flex;align-items:center;gap:1.25rem;flex-wrap:wrap}
.btn-hero{position:relative;display:inline-flex;align-items:center;gap:.65rem;background:var(--ink);color:var(--paper);border:1px solid var(--ink);border-radius:999px;padding:1.15rem 2rem;font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.15em;text-transform:uppercase;transition:background .25s,border-color .25s,transform .2s;white-space:nowrap}
.btn-hero svg{transition:transform .25s}
.btn-hero:hover{background:var(--acc);border-color:var(--acc)}
.btn-hero:hover svg{transform:translateX(4px)}
.btn-ghost{position:relative;display:inline-flex;align-items:center;gap:.65rem;background:transparent;color:var(--ink);border:1px solid rgba(10,10,10,.28);border-radius:999px;padding:1.15rem 2rem;font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.15em;text-transform:uppercase;transition:all .25s;white-space:nowrap}
.btn-ghost:hover{border-color:var(--acc);color:var(--acc)}
.trust{margin-top:1.25rem;font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.05em;color:var(--mute);display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}
.trust .sep{color:var(--acc)}

/* ---------- sections ---------- */
.sec{max-width:1200px;margin:0 auto;padding:clamp(4rem,8vw,7rem) var(--pad)}
.sec-label{font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.15em;text-transform:uppercase;color:var(--mute);display:flex;align-items:center;gap:.75rem;margin-bottom:2.5rem}
.sec-label .num{color:var(--acc)}
.sec-label::after{content:"";height:1px;flex:1;background:var(--line)}
.sec-title{font-size:clamp(1.9rem,3.6vw,3rem);font-weight:500;letter-spacing:-.02em;line-height:1.1;margin-bottom:1.25rem;max-width:24ch}
.sec-intro{color:var(--mute);max-width:56ch;font-size:1rem;line-height:1.65;margin-bottom:3rem}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- chips ---------- */
.chip{display:inline-block;border:1px solid rgba(10,10,10,.3);border-radius:999px;padding:.4rem .85rem;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);transition:color .25s,border-color .25s}
.p-card:hover .chip,.rel-card:hover .chip{color:var(--acc);border-color:var(--acc)}
.p-card > .chip{align-self:flex-start}
.rel-card .chip{align-self:flex-start}

/* ---------- post cards (hub) ---------- */
.post-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:1.25rem}
.feat-wrap{margin-bottom:1.25rem}
.p-card{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:12px;padding:2rem 1.75rem;transition:transform .25s,border-color .25s,box-shadow .25s;height:100%}
.p-card:hover{transform:translateY(-4px);border-top-color:var(--acc);box-shadow:0 12px 32px rgba(10,10,10,.07)}
.p-card h3{font-size:clamp(1.25rem,2vw,1.6rem);font-weight:600;letter-spacing:-.015em;line-height:1.2;margin:1.1rem 0 .75rem;transition:color .25s}
.p-card.feat h3{font-size:clamp(1.5rem,2.6vw,2.1rem);max-width:24ch}
.p-card:hover h3{color:var(--acc)}
.p-card .p-exc{font-size:.925rem;color:#5C5C55;line-height:1.65;flex:1;max-width:60ch;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.p-card.feat .p-exc{-webkit-line-clamp:3}
.p-card .p-meta{display:flex;align-items:center;gap:.75rem;margin-top:1.5rem;font-family:var(--f-mono);font-size:.625rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);flex-wrap:wrap}
.p-card .p-meta .sep{color:var(--acc)}
.p-card .p-go,.rel-card .p-go{display:inline-flex;align-items:center;gap:.5rem;margin-top:1.25rem;font-family:var(--f-mono);font-size:.65rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);transition:color .25s}
.p-card .p-go svg,.rel-card .p-go svg{transition:transform .25s}
.p-card:hover .p-go,.rel-card:hover .p-go{color:var(--acc)}
.p-card:hover .p-go svg,.rel-card:hover .p-go svg{transform:translateX(4px)}
.feat-num{font-family:var(--f-mono);font-size:.625rem;letter-spacing:.15em;color:var(--acc)}

/* ---------- why cards (hub) ---------- */
.get-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.25rem}
.get-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:12px;padding:1.9rem 1.6rem;transition:transform .25s,border-color .25s,box-shadow .25s}
.get-card:hover{transform:translateY(-4px);border-top-color:var(--acc);box-shadow:0 12px 32px rgba(10,10,10,.07)}
.get-card .g-num{font-family:var(--f-mono);font-size:.625rem;letter-spacing:.15em;color:var(--acc)}
.get-card h3{font-size:1.15rem;font-weight:500;margin:.9rem 0 .5rem;letter-spacing:-.01em}
.get-card p{font-size:.875rem;color:var(--mute);line-height:1.6}

/* ---------- breadcrumb + article header ---------- */
.crumb{max-width:768px;margin:0 auto;padding:7.5rem var(--pad) 0;font-family:var(--f-mono);font-size:.625rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.crumb a:hover{color:var(--acc)}
.crumb .sep{color:var(--acc)}
.crumb [aria-current]{color:var(--ink)}
.ah{max-width:768px;margin:0 auto;padding:2.25rem var(--pad) 0}
.ah .chip{display:inline-block;border:1px solid var(--acc);color:var(--acc);border-radius:999px;padding:.4rem .85rem;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1.5rem}
h1.ah-title{font-size:clamp(2.3rem,5.5vw,3.9rem);font-weight:500;letter-spacing:-.025em;line-height:1.06}
.ah-dek{margin-top:1.5rem;font-size:clamp(1rem,1.4vw,1.15rem);color:var(--mute);line-height:1.7;max-width:60ch}
.ah-cta{margin-top:1.5rem}
.ah-meta{display:flex;align-items:center;gap:.85rem;margin-top:2.25rem;padding-top:1.5rem;border-top:1px solid var(--line);font-family:var(--f-mono);font-size:.65rem;letter-spacing:.08em;color:var(--mute);flex-wrap:wrap}
.ah-meta .ava{width:40px;height:40px;border-radius:10px;background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;font-family:var(--f-serif);font-style:italic;font-size:1.15rem;flex-shrink:0}
.ah-meta b{color:var(--ink);font-weight:500}
.ah-meta .sep{color:var(--acc)}

/* ---------- article body ---------- */
.art{max-width:768px;margin:0 auto;padding:1rem var(--pad) 0}
.art p{font-size:1.02rem;line-height:1.75;margin:0 0 1.35rem}
.art strong{font-weight:500}
.art a.int{text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(255,77,0,.5);transition:color .2s}
.art a.int:hover{color:var(--acc)}
.answer{background:#fff;border:1px solid var(--line);border-left:3px solid var(--acc);border-radius:12px;padding:1.5rem 1.6rem;margin:2.5rem 0}
.answer .a-label{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--acc);margin-bottom:.75rem;display:block}
.answer p{margin:0;font-size:.98rem;line-height:1.7}
.toc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1.5rem 1.6rem;margin:0 0 2.75rem}
.toc .t-label{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--mute);margin-bottom:.9rem;display:block}
.toc ol{list-style:none;columns:2;column-gap:2rem}
.toc li{margin-bottom:.55rem;break-inside:avoid}
.toc a{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.03em;color:var(--mute);transition:color .2s}
.toc a:hover{color:var(--acc)}
.h2-block{margin-top:4.25rem}
.h2-block .k{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:var(--acc);display:block;margin-bottom:.9rem}
.art h2{font-size:clamp(1.55rem,3vw,2.15rem);font-weight:500;letter-spacing:-.02em;line-height:1.12;margin-bottom:1.35rem}
.art h3{font-size:1.2rem;font-weight:500;letter-spacing:-.01em;margin:2.25rem 0 .6rem}
.art ul,.art ol{margin:0 0 1.5rem;padding-left:0;list-style:none}
.art ul li,.art ol li{position:relative;font-size:1rem;line-height:1.7;padding:.45rem 0 .45rem 1.75rem;color:var(--ink)}
.art ul li::before{content:"·";position:absolute;left:0;color:var(--acc)}
.art ol{counter-reset:step}
.art ol li{counter-increment:step;padding-left:2.5rem}
.art ol li::before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:.65rem;font-family:var(--f-mono);font-size:.68rem;color:var(--acc);letter-spacing:.05em}

/* ---------- tables ---------- */
.t-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff;margin:1.75rem 0 1rem;-webkit-overflow-scrolling:touch}
table.t{width:100%;min-width:560px;border-collapse:collapse;font-size:.9rem}
.t th,.t td{text-align:left;padding:1rem 1.2rem;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55}
.t thead th{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);font-weight:500;border-bottom:1px solid var(--ink)}
.t tbody th{font-family:var(--f-mono);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);font-weight:500}
.t td{color:var(--mute)}
.t tbody tr:last-child th,.t tbody tr:last-child td{border-bottom:0}
.t td b,.t td strong{color:var(--ink);font-weight:500;white-space:nowrap}
.t-note{font-family:var(--f-mono);font-size:.62rem;letter-spacing:.06em;color:var(--mute);line-height:1.8;margin-bottom:1.5rem}
.t-hint{display:none;font-family:var(--f-mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);margin:-0.4rem 0 1rem}
@media (max-width:768px){
  .t-hint{display:block}
  .t th,.t td{padding:.85rem .9rem}
}

/* ---------- note + inline CTA ---------- */
.note{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1.35rem 1.5rem;margin:1.75rem 0;font-size:.95rem;line-height:1.7;color:var(--ink)}
.note b,.note strong{font-weight:500}
.cta-box{background:var(--ink);color:var(--paper);border-radius:12px;padding:2rem 1.9rem;margin:3rem 0;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(250,250,248,.07) 1px,transparent 1px);background-size:calc(100%/6) 100%;pointer-events:none}
.cta-box h2{position:relative;font-size:1.35rem;font-weight:500;letter-spacing:-.015em;line-height:1.25}
.cta-box p{position:relative;color:rgba(250,250,248,.65);font-size:.9rem;margin:.6rem 0 1.4rem}
.cta-box .btn-hero{position:relative;display:inline-flex;align-items:center;gap:.6rem;background:var(--paper);color:var(--ink);border:1px solid var(--paper);border-radius:999px;padding:.85rem 1.5rem;font-family:var(--f-mono);font-size:.65rem;letter-spacing:.13em;text-transform:uppercase;transition:all .25s}
.cta-box .btn-hero:hover{background:var(--acc);color:var(--paper);border-color:var(--acc)}

/* ---------- FAQ ---------- */
.faq{margin-top:1rem}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1.4rem 0;font-size:1.05rem;font-weight:500;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-mono);color:var(--acc);font-size:1.25rem;transition:transform .25s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-a{padding:0 2.5rem 1.4rem 0;color:var(--mute);font-size:.925rem;line-height:1.65}
.faq .faq-a a.int{text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(255,77,0,.5);transition:color .2s}
.faq .faq-a a.int:hover{color:var(--acc)}

/* ---------- author ---------- */
.author{display:flex;gap:1.4rem;background:#fff;border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:12px;padding:1.9rem 1.75rem;margin:3.5rem 0 1rem;transition:border-color .25s,box-shadow .25s,transform .25s}
.author:hover{border-top-color:var(--acc);transform:translateY(-3px);box-shadow:0 12px 32px rgba(10,10,10,.07)}
.author .a-ava{width:60px;height:60px;border-radius:14px;background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;font-family:var(--f-serif);font-style:italic;font-size:1.7rem;flex-shrink:0}
.author .a-role{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;color:var(--acc);margin-bottom:.4rem}
.author h2{font-size:1.2rem;font-weight:500;margin-bottom:.5rem}
.author p{font-size:.88rem;color:var(--mute);line-height:1.65;margin:0}
.author .a-links{margin-top:.9rem;display:flex;gap:1.25rem;flex-wrap:wrap;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase}
.author .a-links a{color:var(--ink);transition:color .2s}
.author .a-links a:hover{color:var(--acc)}

/* ---------- related posts ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-top:1.75rem}
.rel-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:12px;padding:1.9rem 1.75rem;transition:transform .25s,border-color .25s,box-shadow .25s;height:100%}
.rel-card:hover{transform:translateY(-4px);border-top-color:var(--acc);box-shadow:0 12px 32px rgba(10,10,10,.07)}
.rel-card h3{font-size:1.2rem;font-weight:500;letter-spacing:-.01em;line-height:1.25;margin:1rem 0 .6rem}
.rel-card p{font-size:.88rem;color:var(--mute);line-height:1.6;flex:1}

/* ---------- final CTA ---------- */
.final{background:var(--ink);color:var(--paper);border-radius:20px;padding:clamp(3rem,6vw,5rem);text-align:center;position:relative;overflow:hidden;margin-top:4.5rem}
.final::before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(250,250,248,.08) 1px,transparent 1px);background-size:calc(100%/6) 100%;pointer-events:none}
.final h2{font-size:clamp(1.9rem,3.8vw,3.2rem);font-weight:500;letter-spacing:-.02em;line-height:1.08;position:relative}
.final p{color:rgba(250,250,248,.65);margin:1.25rem auto 2.5rem;max-width:48ch;position:relative;font-size:1rem}
.final .btn-hero{background:var(--paper);color:var(--ink);border-color:var(--paper);position:relative;display:inline-flex;align-items:center;gap:.65rem;border:1px solid;border-radius:999px;padding:1.15rem 2rem;font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.15em;text-transform:uppercase;transition:background .25s,border-color .25s}
.final .btn-hero:hover{background:var(--acc);color:var(--paper);border-color:var(--acc)}

/* ---------- footer ---------- */
.ftr{border-top:1px solid var(--line);margin-top:clamp(3rem,6vw,5rem)}
.ftr-in{max-width:1200px;margin:0 auto;padding:2rem var(--pad);display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-family:var(--f-mono);font-size:.65rem;letter-spacing:.08em;color:var(--mute)}
.ftr-in a:hover{color:var(--acc)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .nav-cta{display:none}
}
@media (max-width:640px){
  .hero{min-height:82vh;padding-top:7rem}
  .hero-ctas .btn-hero,.hero-ctas .btn-ghost{width:100%;justify-content:center}
  .p-card .p-meta .sep{display:none}
  .crumb{padding-top:6.5rem}
  .toc ol{columns:1}
  .author{flex-direction:column}
  .cta-box{padding:1.6rem 1.4rem}
  .final .btn-hero{padding:.9rem 1.4rem;font-size:.62rem}
}