/* ===========================
   RESET + ROOT
   =========================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --ink:    #0A0B0D;
  --ink-2:  #101216;
  --ink-3:  #15181D;
  --ink-4:  #1A1E25;
  --paper:  #E8EAED;
  --paper-2:#C4C8CF;
  --muted:  #6B7280;
  --muted-2:#9AA3AF;
  --rule:   #1F232A;
  --rule-bright:#2A3038;
  --signal: #00E5A0;
  --signal-dim:rgba(0,229,160,0.08);
  --signal-mid:rgba(0,229,160,0.15);
  --signal-glow:rgba(0,229,160,0.45);

  --font-ui:   'Inter',system-ui,sans-serif;
  --font-mono: 'JetBrains Mono',ui-monospace,monospace;
  --font-serif:'Instrument Serif',serif;

  --ease-out: cubic-bezier(0.16,1,0.3,1);
  --ease-tap: cubic-bezier(0.65,0,0.35,1);
}

html{font-size:16px;scroll-behavior:smooth;background:var(--ink)}
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-ui);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-feature-settings:'ss01','cv11','cv05','cv02';
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;background:none;border:none;color:inherit}
*:focus{outline:none}
*:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}
::selection{background:var(--signal);color:var(--ink)}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--ink)}
::-webkit-scrollbar-thumb{background:var(--rule-bright);border-radius:2px}

#scroll-progress{
  position:fixed;top:0;left:0;right:0;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  z-index:2000;
  pointer-events:none;
  will-change:transform;
}

#nav{
  position:fixed;top:0;left:0;right:0;
  z-index:1000;
  height:64px;
  padding:0 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:rgba(10,11,13,0.75);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-bottom:1px solid var(--rule);
  transition:background 0.4s var(--ease-out);
}
@media(min-width:768px){#nav{padding:0 32px}}

.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-mark{
  width:22px;height:22px;
  border:1.5px solid rgba(232,234,237,0.4);
  border-radius:4px;
  display:grid;place-items:center;
}
.logo-mark::after{
  content:'';
  width:7px;height:7px;
  background:var(--signal);
  border-radius:50%;
  box-shadow:0 0 8px var(--signal-glow);
}
.logo-wordmark{
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--paper);
  line-height:1;
}
.logo-wordmark .lw-found{color:var(--signal);text-shadow:0 0 14px var(--signal-glow)}

.nav-right{display:flex;align-items:center;gap:12px}
.nav-back{
  font-size:13px;
  color:var(--muted);
  display:none;
  align-items:center;
  gap:6px;
  transition:color 0.2s;
}
.nav-back:hover{color:var(--paper-2)}
@media(min-width:640px){.nav-back{display:flex}}
.nav-back svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

.nav-cta{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:8px 16px;
  background:var(--signal);
  color:var(--ink);
  border-radius:3px;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:transform 0.15s var(--ease-tap), box-shadow 0.25s;
  white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 6px 20px -6px var(--signal-glow)}

.article-wrap{
  max-width:760px;
  margin:0 auto;
  padding:0 20px;
}
@media(min-width:640px){.article-wrap{padding:0 32px}}
@media(min-width:900px){.article-wrap{padding:0 24px}}

.article-hero{
  padding:128px 0 72px;
  border-bottom:1px solid var(--rule);
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:32px;
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
  letter-spacing:0.05em;
}
.breadcrumb a{transition:color 0.2s}
.breadcrumb a:hover{color:var(--signal)}
.breadcrumb-sep{color:var(--rule-bright)}

.article-tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--signal);
  padding:5px 10px;
  background:var(--signal-dim);
  border:1px solid rgba(0,229,160,0.2);
  border-radius:3px;
  margin-bottom:24px;
}
.article-tag-dot{
  width:6px;height:6px;
  background:var(--signal);
  border-radius:50%;
  box-shadow:0 0 6px var(--signal-glow);
  flex-shrink:0;
}

.article-title{
  font-family:var(--font-serif);
  font-style:italic;
  font-size:clamp(2rem,5vw,3.25rem);
  line-height:1.15;
  letter-spacing:-0.01em;
  color:var(--paper);
  margin-bottom:24px;
}

.article-meta{
  display:flex;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
}
.article-author{
  display:flex;
  align-items:center;
  gap:10px;
}
.author-avatar{
  width:36px;height:36px;
  border-radius:50%;
  background:var(--ink-4);
  border:1.5px solid var(--rule-bright);
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  color:var(--signal);
  flex-shrink:0;
}
.author-info{display:flex;flex-direction:column;gap:1px}
.author-name{font-size:13px;font-weight:600;color:var(--paper)}
.author-role{font-size:11.5px;color:var(--muted)}

.meta-divider{width:1px;height:28px;background:var(--rule-bright)}

.meta-item{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--muted);
  font-family:var(--font-mono);
}
.meta-item svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

.stat-band{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--rule);
  border:1px solid var(--rule);
  border-radius:8px;
  overflow:hidden;
  margin:48px 0;
}
@media(min-width:540px){.stat-band{grid-template-columns:repeat(4,1fr)}}
.stat-cell{
  background:var(--ink-2);
  padding:20px 18px;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.stat-value{
  font-family:var(--font-mono);
  font-size:clamp(1.35rem,3vw,1.75rem);
  font-weight:700;
  color:var(--signal);
  letter-spacing:-0.02em;
  line-height:1;
}
.stat-label{
  font-size:11px;
  color:var(--muted);
  line-height:1.4;
}

.article-body{
  padding:64px 0;
}

.article-intro{
  font-size:1.125rem;
  line-height:1.75;
  color:var(--paper-2);
  margin-bottom:56px;
  padding-bottom:40px;
  border-bottom:1px solid var(--rule);
}
.article-intro strong{color:var(--paper);font-weight:600}

.article-section{margin-bottom:64px}

.section-header{
  display:flex;
  align-items:flex-start;
  gap:16px;
  margin-bottom:28px;
}
.section-num{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--signal);
  background:var(--signal-dim);
  border:1px solid rgba(0,229,160,0.18);
  border-radius:3px;
  padding:4px 8px;
  margin-top:4px;
  white-space:nowrap;
  flex-shrink:0;
}
.section-title-wrap{display:flex;flex-direction:column;gap:4px}
.section-step-label{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.section-title{
  font-size:clamp(1.25rem,2.5vw,1.625rem);
  font-weight:600;
  letter-spacing:-0.02em;
  color:var(--paper);
  line-height:1.25;
}

.prose p{
  font-size:1rem;
  line-height:1.75;
  color:var(--paper-2);
  margin-bottom:20px;
}
.prose p:last-child{margin-bottom:0}
.prose strong{color:var(--paper);font-weight:600}
.prose a{color:var(--signal);text-decoration:underline;text-decoration-color:rgba(0,229,160,0.3);text-underline-offset:3px;transition:text-decoration-color 0.2s}
.prose a:hover{text-decoration-color:var(--signal)}
.prose code{
  font-family:var(--font-mono);
  font-size:0.85em;
  color:var(--paper-2);
  background:var(--ink-4);
  border:1px solid var(--rule-bright);
  padding:1px 6px;
  border-radius:3px;
}

.answer-block{
  background:var(--ink-2);
  border:1px solid var(--rule-bright);
  border-left:3px solid var(--signal);
  border-radius:0 6px 6px 0;
  padding:20px 24px;
  margin:28px 0;
}
.answer-block p{
  font-size:0.9375rem;
  line-height:1.7;
  color:var(--paper-2);
  margin:0 0 12px 0;
}
.answer-block p:last-child{margin-bottom:0}
.answer-block strong{color:var(--paper);font-weight:600}

.stat-inline{
  font-family:var(--font-mono);
  font-weight:700;
  color:var(--signal);
  font-size:0.95em;
}

.step-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:0;
  margin:28px 0;
  border:1px solid var(--rule-bright);
  border-radius:8px;
  overflow:hidden;
}
.step-item{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 20px;
  background:var(--ink-2);
  border-bottom:1px solid var(--rule);
  transition:background 0.2s;
}
.step-item:last-child{border-bottom:none}
.step-item:hover{background:var(--ink-3)}
.step-num{
  width:28px;height:28px;
  border-radius:50%;
  background:var(--signal-dim);
  border:1px solid rgba(0,229,160,0.25);
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:700;
  color:var(--signal);
  flex-shrink:0;
  margin-top:1px;
  text-align:center;
  line-height:1;
  padding:0 2px;
}
.step-content{display:flex;flex-direction:column;gap:4px}
.step-label{font-size:14px;font-weight:600;color:var(--paper);line-height:1.3}
.step-desc{font-size:13px;color:var(--muted);line-height:1.6}
.step-desc a{color:var(--signal);text-decoration:underline;text-decoration-color:rgba(0,229,160,0.3);text-underline-offset:2px}
.step-desc code{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--paper-2);
  background:var(--ink-4);
  border:1px solid var(--rule-bright);
  padding:1px 6px;
  border-radius:3px;
}

/* Reasons list — numbered detailed cards */
.reasons-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin:28px 0;
}
.reason-card{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 20px;
  background:var(--ink-2);
  border:1px solid var(--rule);
  border-radius:8px;
  transition:border-color 0.2s,background 0.2s;
}
.reason-card:hover{border-color:rgba(0,229,160,0.2);background:var(--ink-3)}
.reason-letter{
  width:28px;height:28px;
  border-radius:6px;
  background:var(--signal-dim);
  border:1px solid rgba(0,229,160,0.25);
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  color:var(--signal);
  flex-shrink:0;
  margin-top:1px;
}
.reason-content{display:flex;flex-direction:column;gap:6px}
.reason-title{font-size:14.5px;font-weight:600;color:var(--paper);line-height:1.35}
.reason-desc{font-size:13.5px;color:var(--muted-2);line-height:1.65}

.faq-section{
  margin-bottom:64px;
  padding-top:48px;
  border-top:1px solid var(--rule);
}
.faq-section-header{margin-bottom:32px}
.faq-label{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:8px;
}
.faq-title{
  font-size:clamp(1.25rem,2.5vw,1.625rem);
  font-weight:600;
  letter-spacing:-0.02em;
  color:var(--paper);
}

.faq-list{display:flex;flex-direction:column;gap:0;border:1px solid var(--rule-bright);border-radius:8px;overflow:hidden}

.faq-item{border-bottom:1px solid var(--rule)}
.faq-item:last-child{border-bottom:none}

.faq-question{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  padding:20px 22px;
  text-align:left;
  cursor:pointer;
  background:var(--ink-2);
  transition:background 0.2s;
}
.faq-question:hover{background:var(--ink-3)}
.faq-q-text{font-size:14.5px;font-weight:600;color:var(--paper);line-height:1.45;padding-top:1px}
.faq-chevron{
  width:20px;height:20px;
  border-radius:50%;
  background:var(--ink-4);
  border:1px solid var(--rule-bright);
  display:grid;place-items:center;
  flex-shrink:0;
  transition:transform 0.3s var(--ease-out),background 0.2s,border-color 0.2s;
}
.faq-chevron svg{
  width:10px;height:10px;
  stroke:var(--muted);
  fill:none;
  stroke-width:2.5;
  stroke-linecap:round;
  stroke-linejoin:round;
  transition:stroke 0.2s;
}
.faq-item.open .faq-chevron{
  transform:rotate(180deg);
  background:var(--signal-dim);
  border-color:rgba(0,229,160,0.25);
}
.faq-item.open .faq-chevron svg{stroke:var(--signal)}

.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.4s var(--ease-out);
  background:var(--ink-2);
}
.faq-answer-inner{
  padding:0 22px 20px;
  font-size:14px;
  line-height:1.75;
  color:var(--muted-2);
  border-top:1px solid var(--rule);
}
.faq-item.open .faq-answer{max-height:400px}

.cta-box{
  background:var(--ink-2);
  border:1px solid var(--rule-bright);
  border-radius:12px;
  padding:40px 32px;
  text-align:center;
  margin-bottom:64px;
  position:relative;
  overflow:hidden;
}
.cta-box::before{
  content:'';
  position:absolute;
  top:-80px;left:50%;transform:translateX(-50%);
  width:320px;height:160px;
  background:radial-gradient(ellipse,rgba(0,229,160,0.1) 0%,transparent 70%);
  pointer-events:none;
}
.cta-box-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--signal);
  margin-bottom:14px;
}
.cta-box-title{
  font-size:clamp(1.25rem,2.5vw,1.75rem);
  font-weight:700;
  letter-spacing:-0.02em;
  color:var(--paper);
  margin-bottom:12px;
  line-height:1.2;
}
.cta-box-desc{
  font-size:14.5px;
  line-height:1.7;
  color:var(--muted-2);
  margin-bottom:28px;
  max-width:480px;
  margin-left:auto;
  margin-right:auto;
}
.cta-btn-row{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
}
.cta-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:14px 24px;
  background:var(--signal);
  color:var(--ink);
  border-radius:4px;
  cursor:pointer;
  transition:transform 0.15s var(--ease-tap),box-shadow 0.25s;
}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 28px -8px var(--signal-glow)}
.cta-btn.cta-btn-ghost{
  background:transparent;
  color:var(--paper);
  border:1px solid var(--rule-bright);
}
.cta-btn.cta-btn-ghost:hover{
  border-color:rgba(0,229,160,0.35);
  background:var(--signal-dim);
  color:var(--signal);
  box-shadow:none;
}
.cta-note{
  margin-top:14px;
  font-size:12px;
  color:var(--muted);
  font-family:var(--font-mono);
}

.article-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  padding:32px 0 48px;
  border-top:1px solid var(--rule);
}
.article-nav-card{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 20px;
  background:var(--ink-2);
  border:1px solid var(--rule);
  border-radius:8px;
  transition:border-color 0.2s,background 0.2s,transform 0.2s var(--ease-out);
}
.article-nav-card:hover{
  border-color:rgba(0,229,160,0.25);
  background:var(--ink-3);
  transform:translateY(-2px);
}
.article-nav-card.next{text-align:right}
.nav-card-dir{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--muted);
  display:flex;
  align-items:center;
  gap:5px;
}
.article-nav-card.next .nav-card-dir{justify-content:flex-end}
.nav-card-dir svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nav-card-title{font-size:13.5px;font-weight:600;color:var(--paper);line-height:1.35}

footer{
  border-top:1px solid var(--rule);
  padding:40px 20px;
}
@media(min-width:640px){footer{padding:40px 32px}}
.footer-inner{
  max-width:760px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  text-align:center;
}
.footer-logo{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--paper);
}
.footer-logo span{color:var(--signal)}
.footer-links{
  display:flex;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
  justify-content:center;
}
.footer-link{font-size:12.5px;color:var(--muted);transition:color 0.2s}
.footer-link:hover{color:var(--paper-2)}
.footer-copy{font-size:11.5px;color:var(--muted);font-family:var(--font-mono)}

@keyframes fadeUp{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:translateY(0)}
}
.fade-up{opacity:0;animation:fadeUp 0.7s var(--ease-out) forwards}
.fade-up-1{animation-delay:0.05s}
.fade-up-2{animation-delay:0.12s}
.fade-up-3{animation-delay:0.2s}
.fade-up-4{animation-delay:0.28s}
.fade-up-5{animation-delay:0.36s}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms !important;transition-duration:0.01ms !important}
}