/* ===== DigitalSense — dark fintech / SaaS ebook store ===== */
:root{
  --bg:#080c16; --bg2:#0b111f; --surface:#111a2e; --surface2:#16223a;
  --line:rgba(130,160,210,.13); --line2:rgba(130,160,210,.24);
  --violet:#4d7cff; --violet-2:#82a2ff; --cyan:#34e0c4; --gold:#f5b544;   /* azul · azul claro · menta · ámbar */
  --txt:#e9eef9; --muted:#8b98b2; --muted2:#5c6982;
  --r:12px; --rs:9px;
  --maxw:1180px;
  --display:"Sora",system-ui,sans-serif; --body:"Manrope",system-ui,sans-serif; --mono:"JetBrains Mono",ui-monospace,monospace;
  --serif:"Sora",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--txt);font-family:var(--body);
  font-size:16.5px;line-height:1.62;overflow-x:hidden;letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{font-family:var(--display);font-weight:700;line-height:1.05;letter-spacing:-.03em}
.serif{font-family:var(--display);font-weight:700;font-style:normal;color:var(--violet-2);letter-spacing:-.03em}
.grad{background:linear-gradient(100deg,var(--violet-2),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);margin-bottom:18px}
section{position:relative;z-index:1}

/* ===== ambient bg: glow frío + rejilla de puntos ===== */
.ambient{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;background:
  radial-gradient(60vw 60vw at 82% -8%,rgba(77,124,255,.16),transparent 60%),
  radial-gradient(46vw 46vw at 6% 108%,rgba(52,224,196,.1),transparent 60%)}
.orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.4;mix-blend-mode:screen}
.orb--violet{width:52vw;height:52vw;left:-14vw;top:-14vw;background:radial-gradient(circle,#3a5cff,transparent 66%)}
.orb--cyan{width:40vw;height:40vw;right:-12vw;top:32vh;background:radial-gradient(circle,#1fd0b6,transparent 66%);opacity:.28}
.orb--gold{width:34vw;height:34vw;left:12vw;bottom:-12vw;background:radial-gradient(circle,#5566ff,transparent 66%);opacity:.22}
.grain{position:absolute;inset:0;opacity:.5;background-image:radial-gradient(rgba(130,160,210,.14) 1px,transparent 1px);background-size:26px 26px;-webkit-mask-image:linear-gradient(180deg,#000,transparent 70%);mask-image:linear-gradient(180deg,#000,transparent 70%)}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--body);font-weight:700;font-size:.96rem;border:none;cursor:pointer;border-radius:9px;padding:14px 26px;transition:transform .22s cubic-bezier(.2,.7,.2,1),box-shadow .22s,background .22s;white-space:nowrap;letter-spacing:-.01em}
.btn--primary{background:var(--violet);color:#fff;box-shadow:0 8px 24px -8px rgba(77,124,255,.7),inset 0 1px 0 rgba(255,255,255,.2)}
.btn--primary:hover{transform:translateY(-2px);background:#5f8aff;box-shadow:0 14px 32px -8px rgba(77,124,255,.9)}
.btn--lg{padding:17px 34px;font-size:1.04rem}
.btn--ghost{background:rgba(130,160,210,.05);color:var(--txt);border:1px solid var(--line2)}
.btn--ghost:hover{background:rgba(130,160,210,.1);transform:translateY(-1px)}
.btn--text{background:transparent;color:var(--muted);padding:14px 8px}
.btn--text:hover{color:var(--txt)}
.btn--text span{color:var(--cyan);font-weight:700}

/* ===== nav ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:18px clamp(18px,5vw,48px);transition:background .3s,backdrop-filter .3s,padding .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(8,12,22,.72);backdrop-filter:blur(18px) saturate(140%);border-color:var(--line);padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--display);font-weight:700;font-size:1.22rem;letter-spacing:-.03em}
.brand__mark{color:var(--violet);font-size:1rem;filter:drop-shadow(0 0 9px rgba(77,124,255,.8))}
.brand__ia{color:var(--cyan)}
.nav__links{display:flex;gap:30px;font-size:.93rem;font-weight:500;color:var(--muted)}
.nav__links a{transition:color .2s}.nav__links a:hover{color:var(--txt)}
.nav__cta{font-size:.9rem;padding:11px 20px}

/* ===== hero ===== */
.hero{padding:clamp(120px,16vh,180px) clamp(18px,5vw,48px) 0;max-width:var(--maxw);margin:0 auto}
.hero__inner{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center}
.hero__title{font-size:clamp(2.7rem,6.4vw,5rem);font-weight:700;margin:18px 0 24px}
.hero__title span{display:block;overflow:hidden}
.hero__title em{font-family:var(--display);font-style:normal;font-weight:700;color:var(--cyan)}
.hero__sub{font-size:clamp(1.05rem,1.6vw,1.2rem);color:var(--muted);max-width:31em;margin-bottom:30px}
.hero__sub strong{color:var(--txt);font-weight:700}
.hero__cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero__trust{display:flex;align-items:center;gap:12px;font-size:.9rem;color:var(--muted);flex-wrap:wrap}
.hero__trust strong{color:var(--txt)}
.stars{color:var(--gold);letter-spacing:2px;font-size:.95rem}
.dot{color:var(--muted2)}

/* hero art */
.hero__art{display:flex;justify-content:center;perspective:1400px}
.hero__book{position:relative;transform-style:preserve-3d;transform:rotateY(-16deg) rotateX(5deg)}
.hero__glow{position:absolute;inset:-14% -10%;background:radial-gradient(circle at 60% 45%,rgba(77,124,255,.4),transparent 70%);filter:blur(46px);z-index:-1}

/* ===== bookcover component ===== */
.bookcover{position:relative;border-radius:8px;overflow:hidden;aspect-ratio:2/3;box-shadow:0 28px 56px -22px rgba(0,0,0,.85),0 0 0 1px rgba(130,160,210,.12),inset 0 1px 0 rgba(255,255,255,.1)}
.bookcover__art{position:absolute;inset:0;background-size:cover;background-position:center;background-color:#0e1626}
.bookcover__veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,.12) 0%,rgba(6,10,18,.04) 38%,rgba(6,10,18,.8) 82%,rgba(6,10,18,.96) 100%)}
.bookcover__txt{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:9% 9% 11%;gap:.35em}
.bookcover__kicker{font-family:var(--mono);font-size:.58rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
.bookcover__title{font-family:var(--display);font-weight:700;font-size:clamp(1.05rem,2.1vw,1.5rem);line-height:1.03;letter-spacing:-.02em;color:#fff;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.bookcover__brand{font-family:var(--mono);font-size:.6rem;font-weight:500;letter-spacing:.26em;color:rgba(255,255,255,.6);margin-top:.5em}
.bookcover__spine{position:absolute;left:0;top:0;bottom:0;width:9px;background:linear-gradient(90deg,rgba(0,0,0,.45),rgba(255,255,255,.06));border-right:1px solid rgba(255,255,255,.08)}
.bookcover--hero{width:clamp(240px,30vw,330px)}
.bookcover--pack{width:clamp(220px,26vw,300px)}

/* marquee */
.marquee{margin-top:92px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee__track{display:flex;gap:26px;white-space:nowrap;width:max-content;animation:scroll 32s linear infinite;padding:15px 0;font-family:var(--mono);font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}
.marquee__track span{opacity:.8}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ===== promise ===== */
.promise{max-width:var(--maxw);margin:92px auto;padding:0 clamp(18px,5vw,48px)}
.promise__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.promise__item{background:var(--surface);padding:32px 26px;display:flex;flex-direction:column;gap:8px}
.promise__num{font-family:var(--mono);font-size:2.3rem;font-weight:600;color:var(--violet-2);line-height:1;letter-spacing:-.02em}
.promise__item span:last-child{color:var(--muted);font-size:.94rem;line-height:1.45}

/* ===== section heads ===== */
.section-head{max-width:760px;margin:0 auto 56px;text-align:center;padding:0 clamp(18px,5vw,48px)}
.section-head h2{font-size:clamp(2rem,4.5vw,3.15rem)}
.section-head p{color:var(--muted);margin-top:18px;font-size:1.06rem}

/* ===== catalog ===== */
.catalog{max-width:var(--maxw);margin:112px auto;padding:0 clamp(18px,5vw,48px)}
.catalog__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;transition:transform .32s cubic-bezier(.2,.7,.2,1),border-color .32s,box-shadow .32s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-6px);border-color:rgba(77,124,255,.5);box-shadow:0 30px 60px -30px rgba(77,124,255,.5)}
.pcard__cover{margin-bottom:18px;transition:transform .4s;position:relative}
.pcard:hover .pcard__cover{transform:scale(1.015)}
.pcard .bookcover{width:100%}
.pcard__cat{font-family:var(--mono);font-size:.68rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:7px}
.pcard__title{font-family:var(--display);font-size:1.22rem;font-weight:700;line-height:1.12;margin-bottom:8px;letter-spacing:-.02em}
.pcard__desc{color:var(--muted);font-size:.93rem;line-height:1.5;margin-bottom:16px;flex:1}
.pcard__foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto}
.pcard__price{display:flex;align-items:baseline;gap:8px}
.pcard__now{font-family:var(--display);font-size:1.5rem;font-weight:700;color:#fff}
.pcard__old{font-size:.92rem;color:var(--muted2);text-decoration:line-through}
.pcard__buy{background:rgba(130,160,210,.06);border:1px solid var(--line2);color:var(--txt);font-family:var(--body);font-weight:700;font-size:.88rem;padding:11px 18px;border-radius:9px;cursor:pointer;transition:all .22s}
.pcard__buy:hover{background:var(--violet);border-color:var(--violet);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(77,124,255,.8)}
.pcard__badge{position:absolute;top:14px;right:14px;z-index:3;background:var(--cyan);color:#04231d;font-family:var(--mono);font-weight:700;font-size:.62rem;letter-spacing:.05em;padding:5px 11px;border-radius:7px;text-transform:uppercase}

/* ===== pack ===== */
.pack{max-width:var(--maxw);margin:120px auto;padding:0 clamp(18px,5vw,48px)}
.pack__inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:54px;align-items:center;background:radial-gradient(140% 120% at 0% 0%,rgba(77,124,255,.14),transparent 55%),var(--surface);border:1px solid var(--line2);border-radius:20px;padding:clamp(32px,4vw,56px)}
.pack__art{display:flex;justify-content:center}
.pack__copy h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin:14px 0 18px}
.pack__copy>p{color:var(--muted);margin-bottom:24px}
.pack__list{list-style:none;display:grid;gap:12px;margin-bottom:30px}
.pack__list li{position:relative;padding-left:32px;color:var(--txt);font-size:1rem}
.pack__list li::before{content:"→";position:absolute;left:0;top:0;color:var(--cyan);font-family:var(--mono)}
.pack__buy{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:16px}
.pack__price{display:flex;flex-direction:column}
.pack__old{color:var(--muted2);text-decoration:line-through;font-size:1.05rem}
.pack__now{font-family:var(--display);font-size:2.6rem;font-weight:700;color:#fff;line-height:1}
.pack__guarantee{display:block;color:var(--muted);font-size:.9rem}

/* ===== benefits ===== */
.benefits{max-width:var(--maxw);margin:120px auto;padding:0 clamp(18px,5vw,48px)}
.benefits__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:transform .3s,border-color .3s,box-shadow .3s}
.bcard:hover{transform:translateY(-4px);border-color:rgba(77,124,255,.4);box-shadow:0 24px 44px -30px rgba(77,124,255,.45)}
.bcard__ico{font-size:1.7rem;display:block;margin-bottom:16px}
.bcard h3{font-size:1.2rem;margin-bottom:10px}
.bcard p{color:var(--muted);font-size:.95rem}

/* ===== how ===== */
.how{background:linear-gradient(180deg,transparent,rgba(77,124,255,.05),transparent);padding:92px 0}
.how__inner{max-width:var(--maxw);margin:0 auto;padding:0 clamp(18px,5vw,48px)}
.how__head{text-align:center;margin-bottom:54px}
.how__head h2{font-size:clamp(1.9rem,4vw,3rem)}
.how__steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:34px}
.step__n{font-family:var(--mono);font-size:2rem;font-weight:600;color:var(--violet-2);opacity:.7;display:block;margin-bottom:14px}
.step h3{font-size:1.3rem;margin-bottom:10px}
.step p{color:var(--muted)}

/* ===== testimonials ===== */
.testi{max-width:var(--maxw);margin:120px auto;padding:0 clamp(18px,5vw,48px)}
.testi__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:30px}
.tcard .stars{margin-bottom:16px}
.tcard blockquote{font-size:1.04rem;line-height:1.55;margin-bottom:18px;color:var(--txt)}
.tcard figcaption{color:var(--muted);font-size:.9rem;font-family:var(--mono);letter-spacing:.02em}

/* ===== faq ===== */
.faq{max-width:820px;margin:120px auto;padding:0 clamp(18px,5vw,48px)}
.faq__list{display:flex;flex-direction:column;gap:12px}
.faq__item{background:var(--surface);border:1px solid var(--line);border-radius:var(--rs);padding:4px 22px;transition:border-color .25s}
.faq__item[open]{border-color:var(--line2)}
.faq__item summary{font-family:var(--display);font-weight:600;font-size:1.05rem;padding:18px 0;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{content:"+";color:var(--cyan);font-size:1.4rem;font-weight:400;transition:transform .25s}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__item p{color:var(--muted);padding:0 0 20px;font-size:.97rem}

/* ===== final ===== */
.final{max-width:var(--maxw);margin:0 auto 100px;padding:0 clamp(18px,5vw,48px)}
.final__inner{text-align:center;background:radial-gradient(120% 140% at 50% 0%,rgba(77,124,255,.2),transparent 60%),var(--surface);border:1px solid var(--line2);border-radius:22px;padding:clamp(48px,7vw,90px) clamp(24px,5vw,60px)}
.final__inner h2{font-size:clamp(2rem,4.6vw,3.4rem);margin-bottom:18px}
.final__inner p{color:var(--muted);max-width:34em;margin:0 auto 32px;font-size:1.06rem}
.final__cta{display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap}

/* ===== footer ===== */
.foot{border-top:1px solid var(--line);padding:52px clamp(18px,5vw,48px);text-align:center;color:var(--muted)}
.foot__brand{font-family:var(--display);font-weight:700;font-size:1.3rem;margin-bottom:8px}
.foot p{margin-bottom:18px;font-family:var(--mono);font-size:.95rem;letter-spacing:.04em;color:var(--cyan)}
.foot__links{display:flex;gap:24px;justify-content:center;margin-bottom:20px;font-size:.94rem;font-weight:500}
.foot__links a:hover{color:var(--txt)}
.foot small{color:var(--muted2);font-size:.84rem;font-family:var(--mono);letter-spacing:.03em}

/* ===== modal (legacy COD) ===== */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px}
.modal.open{display:flex}
.modal__overlay{position:absolute;inset:0;background:rgba(4,7,14,.72);backdrop-filter:blur(8px)}
.modal__card{position:relative;width:100%;max-width:480px;background:var(--surface);border:1px solid var(--line2);border-radius:20px;padding:34px;max-height:92vh;overflow-y:auto;box-shadow:0 40px 90px -30px rgba(0,0,0,.7);animation:pop .35s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:none}}
.modal__x{position:absolute;top:18px;right:18px;background:rgba(130,160,210,.08);border:none;color:var(--muted);width:34px;height:34px;border-radius:50%;cursor:pointer;font-size:.9rem;transition:all .2s}
.modal__x:hover{background:rgba(130,160,210,.16);color:#fff}
.co__head{display:flex;gap:16px;align-items:center;margin-bottom:22px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.co__cover{width:62px;flex-shrink:0;border-radius:6px;overflow:hidden;aspect-ratio:2/3;background-size:cover;background-position:center;box-shadow:0 8px 20px -8px rgba(0,0,0,.7)}
.co__head h3{font-size:1.15rem;line-height:1.1;margin-bottom:6px}
.co__head .co__price{font-family:var(--display);font-weight:700;font-size:1.3rem;color:var(--violet-2)}
.co__head .co__old{font-size:.9rem;color:var(--muted2);text-decoration:line-through;margin-left:8px}
.co__field{margin-bottom:14px}
.co__field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px;font-weight:500}
.co__field input{width:100%;background:var(--bg2);border:1px solid var(--line2);border-radius:10px;padding:13px 15px;color:var(--txt);font-family:var(--body);font-size:1rem;transition:border-color .2s}
.co__field input:focus{outline:none;border-color:var(--violet)}
.co__pay{width:100%;margin-top:8px;justify-content:center}
.co__note{text-align:center;color:var(--muted2);font-size:.82rem;margin-top:14px;line-height:1.5}
.co__methods{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:14px;opacity:.7;font-size:1.4rem}
.co__success{text-align:center;padding:10px 0}
.co__success .co__check{width:64px;height:64px;border-radius:50%;background:var(--violet);display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin:0 auto 20px;box-shadow:0 0 30px rgba(77,124,255,.55)}
.co__success h3{font-size:1.4rem;margin-bottom:10px}
.co__success p{color:var(--muted);margin-bottom:22px}
.spinner{width:18px;height:18px;border:2px solid rgba(130,160,210,.25);border-top-color:var(--violet);border-radius:50%;animation:spin .7s linear infinite;display:inline-block;vertical-align:middle}
.spinner--lg{width:30px;height:30px;border-width:3px}
@keyframes spin{to{transform:rotate(360deg)}}

/* stripe checkout (legacy modal helpers) */
.co__loading{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px 0;color:var(--muted)}
.co__stripe{display:flex;flex-direction:column}
.co__lbl{font-size:.85rem;color:var(--muted);margin:14px 0 7px;font-weight:500}
.co__lbl:first-child{margin-top:0}
.co__lbl span{color:var(--muted2)}
.co__err{color:#ff8a8a;font-size:.88rem;margin-top:12px;min-height:1px;text-align:center}
.co__pay{width:100%;justify-content:center;margin-top:18px}
.co__badges{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.co__badges span{font-family:var(--mono);font-size:.68rem;font-weight:500;letter-spacing:.06em;color:var(--muted);background:rgba(130,160,210,.06);border:1px solid var(--line);padding:4px 9px;border-radius:6px}

/* ===== reveal anim ===== */
.reveal{opacity:0;transform:translateY(26px)}
.reveal.in{opacity:1;transform:none;transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}

/* ===== responsive ===== */
@media(max-width:900px){
  .hero__inner{grid-template-columns:1fr;gap:50px}
  .hero__art{order:-1}
  .bookcover--hero{width:min(260px,62vw)}
  .nav__links{display:none}
  .promise__grid{grid-template-columns:repeat(2,1fr)}
  .catalog__grid,.benefits__grid,.how__steps,.testi__grid{grid-template-columns:1fr}
  .pack__inner{grid-template-columns:1fr;gap:34px;text-align:center}
  .pack__art{max-width:230px;margin:0 auto}
  .pack__list{text-align:left;max-width:340px;margin:0 auto 30px}
  .pack__buy{justify-content:center}
}
@media(max-width:560px){
  body{font-size:16px}
  .catalog__grid{grid-template-columns:1fr;max-width:340px;margin:0 auto}
  .promise__grid{grid-template-columns:1fr}
  .hero{padding-top:110px}
  .nav__cta{display:none}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}