:root{
  --obsidian:#0B0D14;
  --violet:#5D3EFF;
  --ivory:#F4F0E8;
  --line-dark:rgba(11,13,20,.12);
  --line-light:rgba(244,240,232,.10);
  --shell:min(1380px,calc(100% - 80px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ivory);color:var(--obsidian);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
a{text-decoration:none;color:inherit}
button{font:inherit}
.shell{width:var(--shell);margin:auto}

.site-nav{position:fixed;top:0;left:0;right:0;height:92px;z-index:1000;background:rgba(11,13,20,.95);backdrop-filter:blur(18px);border-bottom:1px solid rgba(244,240,232,.08)}
.nav-shell{width:var(--shell);height:100%;margin:auto;display:grid;grid-template-columns:220px 1fr auto;gap:30px;align-items:center}
.brand{width:205px}.brand img{display:block;width:100%}
.nav-links{display:flex;justify-content:center;gap:28px}.nav-links a{color:rgba(244,240,232,.62);font-size:13px}.nav-links a:hover,.nav-links a.active{color:var(--ivory)}
.nav-actions{display:flex;align-items:center;gap:10px}.back-home{color:rgba(244,240,232,.42);font-size:11px}.campus-link{min-height:44px;padding:0 15px;border:1px solid rgba(244,240,232,.15);display:inline-flex;align-items:center;gap:12px;color:var(--ivory);font-size:11px;font-weight:850}.campus-link span{color:var(--violet);font-size:15px}
.menu-toggle{display:none}

.hero{min-height:100svh;padding:92px 0 40px;position:relative;overflow:hidden;background:var(--obsidian);color:var(--ivory)}
.hero-grid{position:absolute;inset:0;opacity:.15;background-image:linear-gradient(to right,rgba(244,240,232,.06) 1px,transparent 1px),linear-gradient(to bottom,rgba(244,240,232,.04) 1px,transparent 1px);background-size:72px 72px;mask-image:linear-gradient(to right,transparent,#000 35%,#000)}
.hero-shell{min-height:calc(100svh - 132px);display:grid;grid-template-columns:1fr .95fr;gap:58px;align-items:center}
.eyebrow,.section-kicker{margin:0 0 22px;color:var(--violet);font-size:9px;font-weight:900;letter-spacing:.18em}
.hero h1{margin:0;max-width:870px;font-size:clamp(58px,5.7vw,92px);line-height:.92;letter-spacing:-.06em}.hero h1 span{display:block;color:rgba(244,240,232,.38);font-weight:520}
.hero-lead{max-width:680px;margin:30px 0 0;color:rgba(244,240,232,.60);font-size:17px;line-height:1.72}
.hero-actions{display:flex;gap:12px;margin-top:35px}.primary-btn,.secondary-btn{min-height:52px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;gap:22px;font-size:11px;font-weight:850}.primary-btn{background:var(--violet);color:#fff}.primary-btn span{font-size:16px}.secondary-btn{border:1px solid rgba(244,240,232,.16)}
.hero-benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:42px;background:rgba(244,240,232,.09);border:1px solid rgba(244,240,232,.09)}
.hero-benefits article{padding:17px;background:#0F131D}.hero-benefits strong{display:block;color:var(--violet);font-size:18px}.hero-benefits span{display:block;margin-top:5px;color:rgba(244,240,232,.42);font-size:8px;line-height:1.4}

.chat-demo{min-height:640px;display:grid;grid-template-rows:auto 1fr auto;background:#0E121B;border:1px solid rgba(244,240,232,.10);box-shadow:0 30px 80px rgba(0,0,0,.25)}
.chat-head{display:grid;grid-template-columns:42px 1fr auto;gap:12px;align-items:center;padding:18px;border-bottom:1px solid rgba(244,240,232,.08)}.avatar{width:42px;height:42px;background:linear-gradient(135deg,#5D3EFF,#826CFF);position:relative}.avatar:before{content:"";position:absolute;inset:8px;border:1px solid rgba(255,255,255,.45)}
.chat-head small{display:block;color:rgba(244,240,232,.28);font-size:7px;font-weight:900;letter-spacing:.15em}.chat-head strong{display:block;margin-top:4px;font-size:14px}.status{display:flex;gap:7px;align-items:center;color:rgba(244,240,232,.45);font-size:7px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.status i{width:7px;height:7px;border-radius:50%;background:var(--violet);box-shadow:0 0 0 5px rgba(93,62,255,.08)}
.chat-window{padding:18px;display:grid;align-content:start;gap:12px;overflow:auto;min-height:470px}.msg{max-width:86%;padding:14px;border:1px solid rgba(244,240,232,.08);display:none}.msg.visible{display:block;animation:reveal .35s ease both}.msg small{display:block;font-size:7px;font-weight:900;letter-spacing:.15em}.msg p{margin:8px 0 0;font-size:12px;line-height:1.58}.msg.student{justify-self:end;background:#1A1F2B}.msg.student small{color:rgba(244,240,232,.28)}.msg.student p{color:rgba(244,240,232,.70)}.msg.ai{justify-self:start;background:rgba(93,62,255,.12)}.msg.ai small{color:var(--violet)}.msg.ai p{color:rgba(244,240,232,.80)}
.typing-indicator{display:none;gap:6px;width:max-content;padding:10px 12px;border:1px solid rgba(244,240,232,.08);background:#161B26}.typing-indicator.visible{display:flex}.typing-indicator i{width:6px;height:6px;border-radius:50%;background:rgba(244,240,232,.32);animation:typing 1.2s ease-in-out infinite}.typing-indicator i:nth-child(2){animation-delay:.15s}.typing-indicator i:nth-child(3){animation-delay:.3s}
.chat-input{display:flex;justify-content:space-between;gap:15px;align-items:center;padding:14px 18px;border-top:1px solid rgba(244,240,232,.08);background:#0A0D14}.chat-input>span{color:rgba(244,240,232,.28);font-size:11px}.chat-input button{min-height:38px;padding:0 14px;border:0;background:var(--violet);color:#fff;font-size:10px;font-weight:850}.chat-input button span{margin-left:8px}

.section-head{display:grid;grid-template-columns:1.08fr .72fr;gap:74px;align-items:end;padding-bottom:56px;border-bottom:1px solid var(--line-dark)}.section-head h2{margin:0;font-size:clamp(50px,5.1vw,82px);line-height:.94;letter-spacing:-.055em}.section-head h2 span{color:#6E717A;font-weight:520}.section-head>p{margin:0;color:#666973;font-size:16px;line-height:1.72}.section-head.light{border-color:var(--line-light)}.section-head.light h2{color:var(--ivory)}.section-head.light h2 span{color:rgba(244,240,232,.37)}.section-head.light>p{color:rgba(244,240,232,.55)}

.benefits-section{padding:128px 0 112px;background:#E9E6DF}.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:28px;background:var(--line-dark);border:1px solid var(--line-dark)}.benefit-grid article{position:relative;min-height:310px;padding:24px 22px;background:#F1EEE7}.benefit-grid article>span{position:absolute;right:20px;top:20px;color:#A1A3AA;font-size:9px;font-weight:900}.benefit-grid small{color:var(--violet);font-size:8px;font-weight:900;letter-spacing:.15em}.benefit-grid h3{margin:54px 0 0;font-size:31px;line-height:1;letter-spacing:-.045em}.benefit-grid p{margin:13px 0 0;color:#71737A;font-size:12px;line-height:1.6}

.difference-section{padding:128px 0 112px;background:var(--obsidian);color:var(--ivory)}.difference-grid{display:grid;grid-template-columns:1fr 120px 1fr;gap:1px;margin-top:28px;background:rgba(244,240,232,.09);border:1px solid rgba(244,240,232,.09)}.difference-grid article{min-height:370px;padding:26px;background:#0F131D}.difference-grid small{color:rgba(244,240,232,.28);font-size:8px;font-weight:900;letter-spacing:.15em}.difference-grid h3{margin:60px 0 0;font-size:40px;line-height:.96;letter-spacing:-.05em}.difference-grid p{margin:16px 0 0;color:rgba(244,240,232,.48);font-size:12px;line-height:1.6}.difference-grid .conetbit{background:linear-gradient(180deg,rgba(93,62,255,.16),#0F131D 38%)}.difference-grid .conetbit small{color:var(--violet)}.difference-grid .vs{display:grid;place-items:center;min-height:370px}.difference-grid .vs span{color:var(--violet);font-size:16px;font-weight:900}

.usecases-section{padding:128px 0 112px;background:#E9E6DF}.usecases-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px;align-items:start}.usecases-grid h2{margin:0;font-size:clamp(48px,5vw,80px);line-height:.94;letter-spacing:-.055em}.usecases-lead{max-width:540px;margin:24px 0 0;color:#666973;font-size:15px;line-height:1.7}.question-list{display:grid;gap:1px;background:var(--line-dark);border:1px solid var(--line-dark)}.question-list article{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;padding:17px;background:#F1EEE7}.question-list span{color:var(--violet);font-size:24px;line-height:.8}.question-list p{margin:0;font-size:14px;line-height:1.5;color:#3D4048}

.campus-section{padding:128px 0 112px;background:var(--ivory)}.campus-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.campus-visual{min-height:540px;padding:26px;background:#10141E;color:var(--ivory)}.campus-top small{color:var(--violet);font-size:8px;font-weight:900;letter-spacing:.15em}.campus-top strong{display:block;margin-top:7px;font-size:31px;letter-spacing:-.04em}.campus-cards{display:grid;gap:10px;margin-top:34px}.campus-cards article{position:relative;padding:20px;border:1px solid rgba(244,240,232,.08);background:#0B0E15;min-height:110px}.campus-cards small{color:rgba(244,240,232,.27);font-size:7px;font-weight:900;letter-spacing:.13em}.campus-cards strong{display:block;margin-top:10px;font-size:16px}.bar{height:5px;margin-top:17px;background:rgba(244,240,232,.08)}.bar span{display:block;width:68%;height:100%;background:var(--violet)}.campus-cards .ai small{color:var(--violet)}.campus-cards .ai>span{position:absolute;right:18px;bottom:18px;width:9px;height:9px;background:var(--violet);box-shadow:0 0 0 7px rgba(93,62,255,.07);animation:pulse 2.8s ease-in-out infinite}
.campus-copy h2{margin:0;font-size:clamp(48px,5vw,78px);line-height:.94;letter-spacing:-.055em}.campus-copy>p{max-width:610px;margin:24px 0 0;color:#656872;font-size:15px;line-height:1.7}.campus-copy>a{display:inline-flex;align-items:center;gap:16px;margin-top:26px;min-height:48px;padding:0 16px;border:1px solid var(--line-dark);font-size:11px;font-weight:850}.campus-copy>a span{color:var(--violet);font-size:15px}

.why-section{padding:128px 0 112px;background:var(--obsidian);color:var(--ivory)}.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:28px;background:rgba(244,240,232,.09);border:1px solid rgba(244,240,232,.09)}.why-grid article{position:relative;min-height:290px;padding:24px 22px;background:#0F131D}.why-grid article>span{position:absolute;right:20px;top:20px;color:rgba(244,240,232,.20);font-size:9px;font-weight:900}.why-grid h3{margin:54px 0 0;font-size:30px;line-height:1;letter-spacing:-.045em}.why-grid p{margin:13px 0 0;color:rgba(244,240,232,.46);font-size:11px;line-height:1.55}

.closing-section{padding:78px 0;background:#E9E6DF}.closing-inner{display:grid;grid-template-columns:14px 1fr auto;gap:22px;align-items:center}.closing-bit{width:12px;height:12px;background:var(--violet);box-shadow:0 0 0 8px rgba(93,62,255,.07)}.closing-inner p{margin:0;color:var(--violet);font-size:8px;font-weight:900;letter-spacing:.16em}.closing-inner h2{margin:9px 0 0;max-width:900px;font-size:clamp(32px,3.6vw,54px);line-height:1;letter-spacing:-.045em}.closing-inner>a{min-height:50px;padding:0 18px;background:var(--obsidian);color:var(--ivory);display:inline-flex;align-items:center;gap:20px;font-size:11px;font-weight:850}.closing-inner>a span{color:var(--violet);font-size:16px}

.site-footer{padding:52px 0 22px;background:#080A10;color:var(--ivory)}.footer-inner{display:flex;justify-content:space-between;gap:60px}.footer-inner img{width:190px}.footer-inner p{margin:14px 0 0;color:rgba(244,240,232,.35);font-size:10px}.footer-links{display:flex;gap:24px;flex-wrap:wrap}.footer-links a{color:rgba(244,240,232,.48);font-size:10px}.footer-links a:hover{color:var(--ivory)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:18px;border-top:1px solid rgba(244,240,232,.07)}.footer-bottom span{color:rgba(244,240,232,.20);font-size:7px;font-weight:850;letter-spacing:.13em}

@keyframes typing{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-4px);opacity:1}}
@keyframes reveal{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{transform:scale(1);box-shadow:0 0 0 7px rgba(93,62,255,.07)}50%{transform:scale(1.08);box-shadow:0 0 0 13px rgba(93,62,255,.02)}}

@media(max-width:1120px){
  :root{--shell:calc(100% - 48px)}
  .nav-shell{grid-template-columns:190px 1fr auto;gap:18px}.brand{width:185px}.nav-links{gap:17px}.back-home{display:none}
  .hero-shell{grid-template-columns:1fr 430px}
}
@media(max-width:900px){
  :root{--shell:calc(100% - 36px)}
  .site-nav{height:78px}.nav-shell{grid-template-columns:1fr auto}.brand{width:180px}
  .nav-links{display:none;position:absolute;left:18px;right:18px;top:78px;padding:18px;background:#0B0D14;border:1px solid rgba(244,240,232,.10);flex-direction:column;align-items:flex-start}.nav-links.open{display:flex}
  .nav-actions{display:none}.menu-toggle{display:grid;gap:6px;place-content:center;width:44px;height:44px;border:1px solid rgba(244,240,232,.14);background:transparent}.menu-toggle span{width:18px;height:1px;background:var(--ivory)}
  .hero{padding-top:78px}.hero-shell{grid-template-columns:1fr;gap:28px;padding:64px 0 55px}
  .section-head{grid-template-columns:1fr;gap:28px;padding-bottom:40px}.benefit-grid{grid-template-columns:1fr 1fr}.difference-grid{grid-template-columns:1fr}.difference-grid .vs{min-height:80px}.usecases-grid,.campus-grid{grid-template-columns:1fr}.why-grid{grid-template-columns:1fr 1fr}.closing-inner{grid-template-columns:14px 1fr}.closing-inner>a{grid-column:2;justify-self:start}
}
@media(max-width:560px){
  :root{--shell:calc(100% - 28px)}
  .hero h1{font-size:clamp(48px,14vw,64px)}.hero-lead{font-size:15px}.hero-actions{display:grid}.primary-btn,.secondary-btn{width:100%}.hero-benefits{grid-template-columns:1fr}.chat-demo{min-height:570px}
  .benefits-section,.difference-section,.usecases-section,.campus-section,.why-section{padding:76px 0 68px}
  .section-head h2{font-size:clamp(44px,13vw,58px)}.benefit-grid,.why-grid{grid-template-columns:1fr}.difference-grid h3{font-size:34px}.question-list article{grid-template-columns:28px 1fr}.campus-visual{min-height:470px}
  .closing-inner{grid-template-columns:1fr}.closing-inner>a{grid-column:auto;width:100%;justify-content:space-between}
  .footer-inner{flex-direction:column;gap:28px}.footer-links{display:grid;grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column;gap:8px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}.typing-indicator i,.campus-cards .ai>span{animation:none!important}
}


/* V27 · Eventos en menú */
@media(min-width:901px){
  .nav-links{gap:15px}
  .nav-links a{font-size:11px}
}
@media(min-width:901px) and (max-width:1240px){
  .nav-shell{grid-template-columns:180px 1fr auto;gap:14px}
  .brand{width:175px}
  .nav-links{gap:9px}
  .nav-links a{font-size:10px}
  .campus-link{padding:0 9px;font-size:10px}
}