@font-face{font-family:'Instrument Serif';src:url(/libro/fonts/instrument-serif.woff2) format('woff2');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:'Instrument Serif';src:url(/libro/fonts/instrument-serif-italic.woff2) format('woff2');font-style:italic;font-weight:400;font-display:swap}
@font-face{font-family:'DM Sans';src:url(/libro/fonts/dm-sans.woff2) format('woff2');font-style:normal;font-weight:100 1000;font-display:swap}
@font-face{font-family:'DM Mono';src:url(/libro/fonts/dm-mono.woff2) format('woff2');font-style:normal;font-weight:400;font-display:swap}
:root{--ink:#1A1A1A;--soft:#5E5953;--line:#D4CFC8;--cream:#F5F2ED;--paper:#FEFCFA;--green:#2D5A4B;--green-d:#234639;--mono:'DM Mono',monospace;--serif:'Instrument Serif',serif;--sans:'DM Sans',sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-weight:350;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--green)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.label{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--green)}
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.05;margin:0}
h2{font-style:italic;font-size:clamp(34px,5vw,52px);margin:10px 0 18px}
h3{font-size:24px;margin-bottom:8px}
p{margin:0 0 14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:14px 26px;font-family:var(--sans);font-weight:500;font-size:16px;text-decoration:none;border:1.5px solid var(--green);transition:background .2s,color .2s}
.btn-primary{background:var(--green);color:#FEFCFA}
.btn-primary:hover{background:var(--green-d);border-color:var(--green-d)}
.btn-ghost{background:transparent;color:var(--green)}
.btn-ghost:hover{background:var(--green);color:#FEFCFA}
section{padding:88px 0}
.cream{background:var(--cream)}
.rule{width:64px;height:2px;background:var(--green);margin:18px 0 22px}

/* header */
header{position:sticky;top:0;z-index:10;background:rgba(254,252,250,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{font-family:var(--mono);font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--green);text-decoration:none}
.nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav ul a{color:var(--soft);text-decoration:none;font-size:15px}
.nav ul a:hover{color:var(--ink)}

/* hero */
.hero{padding:72px 0 88px;background:var(--cream);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero h1{font-style:italic;font-size:clamp(52px,8vw,96px);letter-spacing:-.01em;margin:16px 0 6px}
.hero .lead{font-size:21px;font-weight:300;color:#3E3A35;max-width:560px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0 18px}
.trust{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--soft)}
.book{box-shadow:0 30px 60px -20px rgba(26,26,26,.35),0 12px 24px -12px rgba(26,26,26,.2);border:1px solid var(--line);max-width:380px;margin:0 auto}

/* problem */
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:36px}
.card{background:#FFFFFF;border:1px solid var(--line);border-top:3px solid var(--green);padding:26px}
.card .num{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--green);margin-bottom:10px}
.narrow{max-width:760px}

/* program table */
.weeks{width:100%;border-collapse:collapse;margin-top:28px;background:#FFFFFF;border:1px solid var(--line)}
.weeks th,.weeks td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top}
.weeks th{font-family:var(--mono);font-weight:400;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--green)}
.weeks tr:last-child td{border-bottom:none}

.months{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:32px}
.month{background:#FFFFFF;border:1px solid var(--line);border-top:3px solid var(--green);padding:24px}
.month .num{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--green);margin-bottom:12px}
.month ol{list-style:none;margin:0;padding:0}
.month li{display:grid;grid-template-columns:38px 1fr;gap:6px;padding:9px 0;border-top:1px solid #ECE8E2;font-size:16px;line-height:1.4}
.month li:first-child{border-top:none}
.month li span{font-family:var(--mono);font-size:12px;color:var(--soft);padding-top:2px}
/* includes */
.two{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.checks{list-style:none;padding:0;margin:0}
.checks li{position:relative;padding-left:34px;margin-bottom:14px}
.checks li svg{position:absolute;left:0;top:4px;width:20px;height:20px;color:var(--green)}
.anatomy{background:#FFFFFF;border:1px solid var(--line);padding:28px}
.anatomy ol{margin:0;padding-left:22px}
.anatomy li{margin-bottom:8px}
.anatomy li strong{font-weight:600}

/* sample */
.sample{background:var(--green);color:#F5F2ED}
.sample .label{color:#CFE0D8}
.sample h2{color:#FEFCFA}
.sample-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:center}
.sample .book{max-width:320px;box-shadow:0 30px 60px -20px rgba(0,0,0,.5)}
form{display:grid;gap:14px;margin-top:22px;max-width:520px}
label{display:grid;gap:6px;font-size:14px;color:#E4EEE9}
input[type=text],input[type=email]{min-height:50px;padding:12px 14px;border:1px solid rgba(254,252,250,.4);background:rgba(254,252,250,.08);color:#FEFCFA;font:inherit;font-size:16px}
input::placeholder{color:rgba(254,252,250,.55)}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:#D6E3DD}
.consent input{margin-top:4px;width:18px;height:18px;accent-color:#F5F2ED}
.sample .btn-primary{background:#F5F2ED;color:var(--green);border-color:#F5F2ED}
.sample .btn-primary:hover{background:#FFFFFF}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 6px}
.chips span{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;border:1px solid rgba(245,242,237,.45);padding:5px 9px;color:#E4EEE9}

/* author */
.author-grid{display:grid;grid-template-columns:260px 1fr;gap:48px;align-items:center}
.author-grid img{width:260px;height:260px;object-fit:cover;border-radius:50%}
.creds{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.creds span{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;background:var(--cream);border:1px solid var(--line);padding:6px 10px;color:var(--soft)}

/* science */
.science{display:grid;grid-template-columns:auto 1fr;gap:40px;align-items:center}
.big-num{font-family:var(--serif);font-style:italic;font-size:clamp(90px,14vw,150px);line-height:.9;color:var(--green)}

/* pricing */
.price-box{background:#FFFFFF;border:1px solid var(--line);border-top:4px solid var(--green);padding:40px;text-align:center;max-width:560px;margin:30px auto 0}
.price{font-family:var(--serif);font-style:italic;font-size:76px;line-height:1;margin:10px 0}
.small{font-size:14px;color:var(--soft)}

/* faq */
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-weight:500;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);color:var(--green);font-size:20px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:12px 0 0;color:#3E3A35}

/* program cta */
.program{background:var(--ink);color:#F5F2ED}
.program .label{color:#B5A98A}
.program h2{color:#FEFCFA}
.program .btn-primary{background:#F5F2ED;color:var(--ink);border-color:#F5F2ED}
.program .btn-ghost{color:#F5F2ED;border-color:#F5F2ED}
.program .btn-ghost:hover{background:#F5F2ED;color:var(--ink)}
.program p{color:#E4DED4}

footer{padding:40px 0;border-top:1px solid var(--line);font-size:14px;color:var(--soft)}
.foot{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.foot a{color:var(--soft)}

@media (max-width:860px){
  section{padding:64px 0}
  .hero-grid,.two,.sample-grid,.author-grid,.science{grid-template-columns:1fr;gap:36px}
  .grid3,.months{grid-template-columns:1fr}
  .hero .book{max-width:300px}
  .author-grid img{width:200px;height:200px}
  .nav ul{display:none}
  .nav{flex-wrap:nowrap;min-height:58px}
  .brand{font-size:11px;letter-spacing:.16em}
  header .btn{min-height:42px;padding:9px 14px;font-size:14px;white-space:nowrap}
  .weeks th,.weeks td{padding:12px}
}
/* subpáginas */
.page{padding:72px 0 96px}
.page .wrap{max-width:820px}
.page h1{font-style:italic;font-size:clamp(40px,6vw,64px);margin:12px 0 18px}
.page h2{font-size:clamp(26px,3.4vw,34px);margin:40px 0 12px}
.page p,.page li{color:#2F2C28}
.page ul,.page ol{padding-left:22px;margin:0 0 14px}
.page li{margin-bottom:8px}
.dl{display:grid;grid-template-columns:200px 1fr;gap:36px;align-items:center;background:var(--cream);border:1px solid var(--line);border-top:4px solid var(--green);padding:32px;margin:28px 0}
.dl img{box-shadow:0 18px 36px -14px rgba(26,26,26,.35);border:1px solid var(--line)}
.steps{counter-reset:s;list-style:none;padding:0!important}
.steps li{counter-increment:s;position:relative;padding:14px 0 14px 52px;border-top:1px solid var(--line);margin:0}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:15px;font-family:var(--mono);font-size:13px;color:var(--green)}
.note{font-size:14px;color:var(--soft)}
.legal-doc h2{font-style:normal;font-family:var(--sans);font-weight:600;font-size:19px;margin:32px 0 8px}
.legal-doc p,.legal-doc li{font-size:16px}
.disclaimer{font-size:13px;line-height:1.5;color:#B9B3A9;margin-top:18px;max-width:520px}
.hp{position:absolute;left:-9999px}
@media (max-width:860px){.dl{grid-template-columns:1fr;padding:24px}.dl img{max-width:180px}}
@media (max-width:380px){.hide-xs{display:none}}
img{height:auto}
@media (max-width:860px){.hero-grid,.two,.sample-grid,.author-grid,.science{grid-template-columns:minmax(0,1fr)}.book{width:100%}}