/* ============ TOKENS ============ */
:root{
  --bg:#0a0c11;
  --bg-2:#0e1118;
  --surface:rgba(255,255,255,.035);
  --surface-hover:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.09);
  --border-hover:rgba(255,255,255,.22);
  --text:#e9edf6;
  --muted:#8b93a7;
  --accent-1:#5eead4;
  --accent-2:#818cf8;
  --accent-3:#f0abfc;
  --a1:94,234,212;
  --a2:129,140,248;
  --shadow:0 18px 50px -18px rgba(0,0,0,.75);
  --radius:20px;
  --ease:cubic-bezier(.22,1,.36,1);
}
html[data-theme="light"]{
  --bg:#f6f7fb;
  --bg-2:#eef0f7;
  --surface:rgba(255,255,255,.72);
  --surface-hover:rgba(255,255,255,.95);
  --border:rgba(16,20,32,.09);
  --border-hover:rgba(16,20,32,.22);
  --text:#10131c;
  --muted:#5d6579;
  --accent-1:#0d9488;
  --accent-2:#4f46e5;
  --accent-3:#a21caf;
  --a1:13,148,136;
  --a2:79,70,229;
  --shadow:0 20px 45px -22px rgba(20,25,50,.35);
}

/* ============ BASE ============ */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background .5s var(--ease), color .5s var(--ease);
}
a{color:inherit}

.orb{
  position:fixed;
  border-radius:50%;
  filter:blur(90px);
  opacity:.35;
  pointer-events:none;
  z-index:0;
  will-change:transform;
}
.orb.o1{width:44vw;height:44vw;background:radial-gradient(circle,rgba(var(--a1),.55),transparent 70%);top:-12vw;left:-10vw;animation:float1 22s ease-in-out infinite}
.orb.o2{width:38vw;height:38vw;background:radial-gradient(circle,rgba(var(--a2),.5),transparent 70%);top:35vh;right:-14vw;animation:float2 26s ease-in-out infinite}
.orb.o3{width:30vw;height:30vw;background:radial-gradient(circle,rgba(240,171,252,.35),transparent 70%);bottom:-10vw;left:25vw;animation:float1 30s ease-in-out infinite reverse}
@keyframes float1{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(4vw,3vh,0) scale(1.12)}}
@keyframes float2{0%,100%{transform:translate3d(0,0,0) scale(1.05)}50%{transform:translate3d(-5vw,-4vh,0) scale(.92)}}

.wrap{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:0 22px}

/* ============ NAV ============ */
header.nav{
  position:sticky;top:0;z-index:20;
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  background:rgba(10,12,17,.72);
  border-bottom:1px solid var(--border);
}
html[data-theme="light"] header.nav{background:rgba(246,247,251,.72)}
.nav-inner{
  max-width:1080px;margin:0 auto;padding:12px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  display:flex;align-items:center;gap:9px;
  font-weight:700;letter-spacing:-.02em;font-size:.95rem;
  text-decoration:none;
}
.brand .dot{
  width:9px;height:9px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent-1),var(--accent-2));
  box-shadow:0 0 0 0 rgba(var(--a1),.6);
  animation:pulse 2.6s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(var(--a1),.55)}
  70%{box-shadow:0 0 0 12px rgba(var(--a1),0)}
  100%{box-shadow:0 0 0 0 rgba(var(--a1),0)}
}
.toggle{
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  width:40px;height:40px;border-radius:12px;
  display:grid;place-items:center;cursor:pointer;font-size:1rem;
  transition:transform .3s var(--ease), border-color .3s, background .3s;
}
.toggle:hover{transform:translateY(-2px) rotate(-8deg);border-color:var(--border-hover);background:var(--surface-hover)}
.toggle:active{transform:scale(.92)}

/* ============ HERO (index) ============ */
.hero{padding:88px 0 34px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);font-weight:600;
  border:1px solid var(--border);background:var(--surface);
  padding:7px 15px;border-radius:999px;
  opacity:0;animation:riseIn .8s var(--ease) .05s forwards;
}
.eyebrow b{color:var(--text);font-weight:700;letter-spacing:.16em}
h1{
  font-size:clamp(2.3rem,6.4vw,4.35rem);
  line-height:1.03;
  letter-spacing:-.035em;
  margin:22px 0 0;
  font-weight:800;
  opacity:0;animation:riseIn .9s var(--ease) .15s forwards;
}
h1 .grad{
  background:linear-gradient(100deg,var(--accent-1),var(--accent-2),var(--accent-3),var(--accent-1));
  background-size:300% 100%;
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
  animation:shine 9s linear infinite;
}
@keyframes shine{to{background-position:300% 0}}
.lede{
  max-width:620px;margin:22px auto 0;color:var(--muted);
  font-size:1.06rem;
  opacity:0;animation:riseIn .9s var(--ease) .28s forwards;
}
@keyframes riseIn{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}

.bio{
  display:inline-flex;align-items:center;gap:14px;
  margin-top:30px;padding:14px 22px 14px 14px;
  border:1px solid var(--border);border-radius:999px;
  background:var(--surface);
  text-align:left;
  opacity:0;animation:riseIn .9s var(--ease) .4s forwards;
  transition:border-color .4s var(--ease), transform .4s var(--ease), background .4s;
}
.bio:hover{border-color:var(--border-hover);transform:translateY(-3px);background:var(--surface-hover)}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 44px;
  display:grid;place-items:center;font-size:1.35rem;
  background:linear-gradient(135deg,rgba(var(--a1),.25),rgba(var(--a2),.28));
  border:1px solid var(--border);
}
.bio p{margin:0;font-size:.9rem;line-height:1.45}
.bio strong{font-weight:700}
.bio span{color:var(--muted);font-size:.82rem}

.rail{
  position:relative;height:26px;margin:52px 0 10px;
  opacity:0;animation:riseIn 1s var(--ease) .5s forwards;
}
.rail::before{
  content:"";position:absolute;top:50%;left:0;right:0;height:2px;
  background:repeating-linear-gradient(90deg,var(--border) 0 10px,transparent 10px 18px);
}
.train{
  position:absolute;top:50%;left:0;transform:translateY(-58%);
  font-size:1.15rem;
  animation:choo 20s linear infinite;
  filter:saturate(.85);
}
@keyframes choo{
  0%{left:-4%;opacity:0}
  8%{opacity:.85}
  92%{opacity:.85}
  100%{left:104%;opacity:0}
}

/* ============ GRID / CARDS ============ */
.grid{
  display:grid;gap:20px;
  grid-template-columns:repeat(auto-fit,minmax(310px,1fr));
  padding:26px 0 10px;
}
.card{
  position:relative;
  padding:28px 26px 24px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surface);
  overflow:hidden;
  isolation:isolate;
  transition:opacity .8s var(--ease), transform .8s var(--ease),
             border-color .4s var(--ease), box-shadow .5s var(--ease),
             background .4s var(--ease);
}
.js .card:not(.visible),
.js .outro:not(.visible){
  opacity:0;
  transform:translateY(30px);
}
.card:hover{
  border-color:var(--border-hover);
  background:var(--surface-hover);
  transform:translateY(-7px);
  box-shadow:var(--shadow);
}
.card::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(340px circle at var(--mx,50%) var(--my,0%),
             rgba(var(--a1),.16), transparent 62%);
  opacity:0;transition:opacity .45s var(--ease);
}
.card:hover::before{opacity:1}
.card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--accent-1),var(--accent-2),var(--accent-3));
  transform:scaleX(0);transform-origin:left;
  transition:transform .55s var(--ease);
}
.card:hover::after{transform:scaleX(1)}

.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.num{
  font-size:.7rem;font-weight:700;letter-spacing:.12em;
  color:var(--muted);
  border:1px solid var(--border);border-radius:8px;
  padding:3px 8px;flex:0 0 auto;
  transition:color .3s,border-color .3s;
}
.card:hover .num{color:var(--text);border-color:var(--border-hover)}

.tag{
  font-size:.66rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;white-space:nowrap;
  border:1px solid rgba(var(--a1),.4);
  color:var(--accent-1);
  background:rgba(var(--a1),.09);
}
.tag.warn{
  border-color:rgba(251,191,36,.45);
  color:#fbbf24;background:rgba(251,191,36,.1);
}

.card h2{
  font-size:1.32rem;letter-spacing:-.025em;margin:18px 0 4px;font-weight:750;
  line-height:1.25;
}
.card h2 a{
  text-decoration:none;
  background-image:linear-gradient(var(--accent-1),var(--accent-1));
  background-size:0% 1.5px;background-repeat:no-repeat;background-position:0 100%;
  transition:background-size .45s var(--ease);
}
.card:hover h2 a{background-size:100% 1.5px}

.domain{
  display:inline-block;font-size:.8rem;color:var(--muted);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  letter-spacing:-.01em;
}
.card p{margin:14px 0 0;color:var(--muted);font-size:.945rem}
.card p em{color:var(--text);font-style:normal;font-weight:600}

.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}
.tags span{
  font-size:.72rem;color:var(--muted);
  border:1px solid var(--border);border-radius:999px;
  padding:4px 11px;
  transition:color .3s,border-color .3s,transform .3s var(--ease);
}
.card:hover .tags span{color:var(--text);border-color:var(--border-hover)}
.tags span:hover{transform:translateY(-2px)}

.visit{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:22px;
  font-size:.87rem;font-weight:650;text-decoration:none;
  padding:10px 18px;border-radius:12px;
  border:1px solid var(--border);
  background:linear-gradient(135deg,rgba(var(--a1),.14),rgba(var(--a2),.16));
  transition:transform .35s var(--ease), border-color .35s, box-shadow .35s, gap .35s var(--ease);
}
.visit .arrow{transition:transform .35s var(--ease)}
.visit:hover{
  transform:translateY(-2px);
  border-color:rgba(var(--a1),.5);
  box-shadow:0 10px 28px -14px rgba(var(--a1),.7);
  gap:12px;
}
.visit:hover .arrow{transform:translateX(4px)}
.visit:active{transform:translateY(0) scale(.98)}

/* ============ OUTRO + FOOTER ============ */
.outro{
  margin:70px 0 0;padding:38px 32px;text-align:center;
  border:1px dashed var(--border);border-radius:var(--radius);
  background:var(--surface);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
.outro h3{margin:0 0 10px;font-size:1.35rem;letter-spacing:-.02em}
.outro p{margin:0 auto;color:var(--muted);max-width:560px;font-size:.95rem}

footer{
  margin-top:60px;padding:30px 0 46px;
  border-top:1px solid var(--border);
  text-align:center;color:var(--muted);font-size:.82rem;
}
footer .links{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;margin-bottom:14px}
footer .links a{
  text-decoration:none;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.78rem;position:relative;transition:color .3s;
}
footer .links a::after{
  content:"";position:absolute;left:0;bottom:-3px;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:right;
  transition:transform .4s var(--ease);
}
footer .links a:hover{color:var(--text)}
footer .links a:hover::after{transform:scaleX(1);transform-origin:left}

/* ============ PÁGINAS DE DETALLE ============ */
.detail{padding-bottom:20px}

.back{
  display:inline-flex;align-items:center;gap:8px;
  margin:34px 0 0;
  font-size:.82rem;font-weight:600;text-decoration:none;
  color:var(--muted);
  transition:color .3s, gap .3s var(--ease);
}
.back:hover{color:var(--text);gap:12px}

.detail-hero{padding:24px 0 4px;max-width:760px}
.detail-hero .eyebrow{opacity:1;animation:none}
.detail-hero h1{
  font-size:clamp(2rem,5.5vw,3.4rem);
  margin:16px 0 6px;opacity:1;animation:none;
}
.detail-hero .domain{
  font-size:.9rem;margin:0 0 20px;
  text-decoration:none;
  border-bottom:1px dashed transparent;
  transition:border-color .3s,color .3s;
}
.detail-hero .domain:hover{color:var(--text);border-color:var(--border-hover)}
.detail-hero .lede{
  margin:0 0 26px;max-width:640px;
  opacity:1;animation:none;
}
.detail-hero .visit{margin-top:0}

.prose{max-width:720px;margin:8px 0 40px}
.prose h2{
  font-size:1.22rem;letter-spacing:-.02em;
  margin:42px 0 12px;font-weight:750;color:var(--text);
}
.prose h2:first-child{margin-top:20px}
.prose h3{
  font-size:1.02rem;letter-spacing:-.01em;
  margin:26px 0 8px;font-weight:700;color:var(--text);
}
.prose p{margin:0 0 16px;color:var(--muted);font-size:1rem}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px;color:var(--muted)}
.prose li{margin-bottom:8px}
.prose strong{color:var(--text);font-weight:650}
.prose em{color:var(--text);font-style:normal;font-weight:600}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:var(--surface);border:1px solid var(--border);
  padding:2px 6px;border-radius:6px;font-size:.86em;color:var(--text);
}

.callout{
  margin:22px 0;padding:16px 18px;
  border:1px solid var(--border);border-left:3px solid var(--accent-1);
  border-radius:12px;background:var(--surface);
  color:var(--muted);font-size:.94rem;
}
.callout strong{color:var(--text)}
.callout.warn{border-left-color:#fbbf24}

.features{
  display:grid;gap:14px;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  margin:22px 0 10px;
}
.feature{
  padding:18px 18px 16px;border:1px solid var(--border);border-radius:14px;
  background:var(--surface);
  transition:border-color .35s,transform .35s var(--ease),background .35s;
}
.feature:hover{border-color:var(--border-hover);transform:translateY(-3px);background:var(--surface-hover)}
.feature h3{margin:0 0 6px;font-size:.98rem;font-weight:700;letter-spacing:-.01em;color:var(--text)}
.feature p{margin:0;font-size:.88rem;color:var(--muted)}

.pager{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin:60px 0 0;padding-top:28px;
  border-top:1px solid var(--border);
}
.pager a{
  display:flex;flex-direction:column;gap:3px;
  text-decoration:none;font-size:.9rem;font-weight:650;
  padding:14px 20px;border:1px solid var(--border);border-radius:14px;
  background:var(--surface);min-width:200px;
  transition:transform .35s var(--ease),border-color .35s,background .35s;
}
.pager a:hover{transform:translateY(-3px);border-color:var(--border-hover);background:var(--surface-hover)}
.pager a span{font-size:.72rem;color:var(--muted);font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.pager a.next{margin-left:auto;text-align:right}

/* ============ RESPONSIVE / A11Y ============ */
@media (max-width:600px){
  .hero{padding:60px 0 22px}
  .bio{border-radius:22px;padding:14px 18px}
  .card{padding:24px 20px 20px}
  .outro{padding:30px 20px}
  .pager a{min-width:0;flex:1 1 100%}
  .pager a.next{margin-left:0;text-align:left}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .js .card:not(.visible),
  .js .outro:not(.visible){opacity:1!important;transform:none!important}
  .train{display:none}
}
::selection{background:rgba(var(--a2),.35)}