/* ===== Planes Parejas — design tokens ===== */
:root{
  --ink: #1B1130;
  --ink-2: #241A3D;
  --paper: #FBF3EC;
  --paper-2: #F3E6D8;
  --gold: #D9A566;
  --gold-soft: #E8C48F;
  --rose: #C9667A;
  --text-dark: #2A2036;
  --text-dark-soft: #5B4E6E;
  --text-light: #F3EAE0;
  --lilac: #B9A9D9;
  --radius: 18px;
  --maxw: 1120px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important; transition-duration:.001ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--text-dark);
  font-family:"Literata", Georgia, serif;
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,.display{
  font-family:"Bricolage Grotesque", system-ui, sans-serif;
  font-weight:700;
  line-height:1.05;
  letter-spacing:-0.01em;
  margin:0;
}

.eyebrow{
  font-family:"JetBrains Mono", ui-monospace, monospace;
  font-size:0.72rem;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--gold);
  display:inline-flex;
  align-items:center;
  gap:.5em;
}
.eyebrow::before{
  content:"";
  width:16px; height:1px;
  background:var(--gold);
  display:inline-block;
}

a{color:inherit;}
img{max-width:100%; display:block;}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px;}

/* ---- buttons ---- */
.btn{
  font-family:"JetBrains Mono", monospace;
  font-size:.85rem;
  letter-spacing:.03em;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding:14px 26px;
  border-radius:999px;
  border:1px solid transparent;
  transition:transform .18s ease, box-shadow .18s ease;
}
.btn:focus-visible{outline:2px solid var(--gold); outline-offset:3px;}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--gold); color:var(--ink);}
.btn-primary:hover{box-shadow:0 10px 24px -8px rgba(217,165,102,.6);}
.btn-ghost{border-color:currentColor; color:inherit;}

/* ---- nav ---- */
header.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(27,17,48,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(243,234,224,.08);
}
header.nav .wrap{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:16px; padding-bottom:16px;
}
.logo{
  font-family:"Bricolage Grotesque", sans-serif;
  font-weight:700;
  font-size:1.15rem;
  color:var(--text-light);
  text-decoration:none;
  letter-spacing:-.01em;
}
.logo span{color:var(--gold);}
nav.links{display:flex; align-items:center; gap:28px;}
nav.links a{
  color:var(--lilac);
  text-decoration:none;
  font-family:"JetBrains Mono", monospace;
  font-size:.8rem;
  letter-spacing:.04em;
}
nav.links a:hover{color:var(--text-light);}
.nav-toggle{display:none; background:none; border:0; color:var(--text-light); font-size:1.5rem; cursor:pointer;}

@media (max-width:820px){
  nav.links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:flex-start;
    background:var(--ink); padding:20px 24px 28px;
    border-bottom:1px solid rgba(243,234,224,.08);
    display:none;
  }
  nav.links.open{display:flex;}
  .nav-toggle{display:block;}
}

/* ---- sections ---- */
section{padding:96px 0;}
.section-dark{background:var(--ink); color:var(--text-light);}
.section-paper{background:var(--paper);}
.section-paper-2{background:var(--paper-2);}

/* ---- hero ---- */
.hero{
  position:relative;
  background:var(--ink);
  color:var(--text-light);
  padding:80px 0 60px;
  overflow:hidden;
}
.hero .wrap{position:relative; z-index:2;}
.hero h1{
  font-size:clamp(2.4rem, 5.4vw, 4.4rem);
  max-width:16ch;
  margin-top:18px;
}
.hero h1 em{
  font-style:italic;
  color:var(--gold);
}
.hero p.lead{
  font-family:"Literata", serif;
  font-size:1.15rem;
  color:var(--lilac);
  max-width:46ch;
  margin-top:22px;
}
.hero .cta-row{display:flex; gap:16px; margin-top:36px; flex-wrap:wrap;}

.thread-svg{
  position:absolute;
  right:-6%; top:0;
  height:100%;
  width:60%;
  z-index:1;
  opacity:.9;
}
@media (max-width:900px){
  .thread-svg{display:none;}
}

.milestones{
  display:flex; gap:40px; margin-top:56px; flex-wrap:wrap;
}
.milestone{display:flex; align-items:center; gap:10px; font-family:"JetBrains Mono", monospace; font-size:.78rem; color:var(--lilac);}
.milestone .dot{width:9px; height:9px; border-radius:50%; background:var(--gold);}

/* ---- pillars ---- */
.pillars{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  margin-top:56px;
}
@media (max-width:820px){.pillars{grid-template-columns:1fr;}}
.pillar{
  background:var(--paper);
  border:1px solid rgba(42,32,54,.08);
  border-radius:var(--radius);
  padding:32px 28px;
  position:relative;
}
.pillar .mark{
  font-family:"JetBrains Mono", monospace;
  font-size:.72rem;
  color:var(--rose);
  letter-spacing:.08em;
  text-transform:uppercase;
}
.pillar h3{font-size:1.5rem; margin-top:10px;}
.pillar p{color:var(--text-dark-soft); margin-top:10px; font-size:.98rem;}

.section-head{max-width:640px;}
.section-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem); margin-top:14px;}
.section-head p{color:var(--text-dark-soft); margin-top:16px; font-size:1.05rem;}
.section-dark .section-head p{color:var(--lilac);}

/* ---- topic chips (ejercicios) ---- */
.topics{
  display:flex; flex-wrap:wrap; gap:12px;
  margin-top:44px;
}
.topic{
  border:1px solid rgba(243,234,224,.22);
  border-radius:999px;
  padding:10px 20px;
  font-family:"JetBrains Mono", monospace;
  font-size:.82rem;
  color:var(--text-light);
  display:flex; align-items:center; gap:8px;
}
.topic .n{color:var(--gold);}

.exercise-card{
  margin-top:44px;
  background:var(--ink-2);
  border:1px solid rgba(243,234,224,.1);
  border-radius:var(--radius);
  padding:32px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:24px;
  align-items:center;
}
@media (max-width:700px){.exercise-card{grid-template-columns:1fr;}}
.exercise-card h3{font-size:1.3rem; color:var(--text-light);}
.exercise-card p{color:var(--lilac); margin-top:8px;}

/* ---- polaroids (historia) ---- */
.historia-grid{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:56px;
  align-items:center;
  margin-top:48px;
}
@media (max-width:860px){.historia-grid{grid-template-columns:1fr;}}
.polaroid-stack{position:relative; height:380px;}
.polaroid{
  position:absolute;
  width:200px;
  background:#fff;
  padding:12px 12px 40px;
  border-radius:4px;
  box-shadow:0 18px 30px -12px rgba(42,32,54,.35);
  font-family:"JetBrains Mono", monospace;
  font-size:.7rem;
  color:var(--text-dark-soft);
}
.polaroid .photo{
  height:150px; border-radius:2px;
  background:linear-gradient(135deg, var(--gold-soft), var(--rose));
}
.polaroid.p1{top:0; left:10%; transform:rotate(-7deg); z-index:2;}
.polaroid.p2{top:70px; left:42%; transform:rotate(5deg); z-index:3;}
.polaroid.p3{top:190px; left:6%; transform:rotate(4deg); z-index:1;}
.polaroid .caption{margin-top:10px;}

/* ---- blog teaser ---- */
.blog-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:48px;
}
@media (max-width:860px){.blog-grid{grid-template-columns:1fr;}}
.post-card{
  text-decoration:none; color:inherit;
  display:block;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--paper);
  border:1px solid rgba(42,32,54,.08);
  transition:transform .18s ease;
}
.post-card:hover{transform:translateY(-4px);}
.post-card .thumb{height:150px; background:linear-gradient(135deg, var(--rose), var(--ink));}
.post-card .body{padding:22px 22px 26px;}
.post-card .date{font-family:"JetBrains Mono", monospace; font-size:.72rem; color:var(--rose); letter-spacing:.04em;}
.post-card h3{font-size:1.15rem; margin-top:10px;}
.post-card p{font-size:.92rem; color:var(--text-dark-soft); margin-top:8px;}

/* ---- CTA band ---- */
.cta-band{
  background:linear-gradient(120deg, var(--gold) 0%, var(--rose) 100%);
  color:var(--ink);
  text-align:center;
  padding:80px 0;
}
.cta-band h2{font-size:clamp(1.8rem,3.6vw,2.8rem); max-width:20ch; margin:0 auto;}
.cta-band .cta-row{justify-content:center; margin-top:32px;}
.cta-band .btn-primary{background:var(--ink); color:var(--text-light);}
.cta-band .btn-ghost{border-color:var(--ink);}

/* ---- footer ---- */
footer{background:var(--ink); color:var(--lilac); padding:56px 0 32px;}
footer .foot-top{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:32px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(243,234,224,.08);
}
footer .foot-links{display:flex; gap:48px; flex-wrap:wrap;}
footer .foot-links h4{
  font-family:"JetBrains Mono", monospace;
  font-size:.72rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--gold); margin-bottom:12px;
}
footer .foot-links a{display:block; color:var(--lilac); text-decoration:none; font-size:.9rem; margin-bottom:8px;}
footer .foot-links a:hover{color:var(--text-light);}
footer .foot-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  padding-top:24px;
  font-family:"JetBrains Mono", monospace; font-size:.72rem; color:rgba(185,169,217,.6);
}

/* ---- blog listing / post page ---- */
.blog-header{background:var(--ink); color:var(--text-light); padding:80px 0 56px;}
.blog-header h1{font-size:clamp(2rem,4vw,3rem);}
.blog-header p{color:var(--lilac); margin-top:14px; max-width:50ch;}

.post-list{display:grid; grid-template-columns:repeat(2,1fr); gap:28px; padding:64px 0;}
@media (max-width:760px){.post-list{grid-template-columns:1fr;}}

.post-article{max-width:680px; margin:0 auto; padding:72px 24px 100px;}
.post-article .date{font-family:"JetBrains Mono", monospace; font-size:.78rem; color:var(--rose);}
.post-article h1{font-size:clamp(1.8rem,4vw,2.6rem); margin-top:14px;}
.post-article .lede{color:var(--text-dark-soft); font-size:1.1rem; margin-top:18px;}
.post-article .content{margin-top:36px; font-size:1.08rem;}
.post-article .content h2{font-size:1.4rem; margin-top:40px; margin-bottom:14px; font-family:"Bricolage Grotesque",sans-serif;}
.post-article .content p{margin:0 0 18px;}
.post-article .back{
  display:inline-block; margin-bottom:32px;
  font-family:"JetBrains Mono", monospace; font-size:.8rem; color:var(--rose); text-decoration:none;
}