/* Paleta original yb-dark-skin de Sergio */
  :root {
    --bg:      #031324;
    --bg2:     #051c35;
    --bg3:     #0a2540;
    --border:  rgba(255,255,255,0.08);
    --border-h:rgba(255,255,255,0.18);
    --text:    #ffffff;
    --text2:   rgba(255,255,255,0.58);
    --text3:   rgba(255,255,255,0.28);
    --accent:  #1e87f0;
    --accent2: #1567c8;
    --neon:    #00ff95;
    --green:   #4ade80;
  }
  *,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{background:var(--bg);color:var(--text);font-family:'Poppins',sans-serif;font-size:16px;line-height:1.6;overflow-x:hidden;}

  /* NAV */
  nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:18px 60px;display:flex;justify-content:space-between;align-items:center;background:rgba(3,19,36,0.96);border-bottom:1px solid var(--border);backdrop-filter:blur(8px);}
  .nav-logo{font-weight:800;font-size:17px;color:var(--text);text-decoration:none;letter-spacing:-0.5px;display:flex;align-items:center;gap:8px;}
  .nav-logo::before{content:'';width:10px;height:10px;border-radius:50%;background:var(--accent);flex-shrink:0;}
  .nav-logo span{color:var(--accent);}
  .nav-links{display:flex;gap:30px;list-style:none;}
  .nav-links a{font-size:13px;font-weight:500;color:var(--text2);text-decoration:none;transition:color .2s;}
  .nav-links a:hover{color:var(--accent);}

  /* HERO */
  #hero{min-height:100vh;display:flex;flex-direction:column;justify-content:flex-end;padding:0 60px 80px;position:relative;overflow:hidden;}
  .hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% at 65% 35%,rgba(30,135,240,0.09) 0%,transparent 60%),radial-gradient(ellipse 45% 50% at 10% 80%,rgba(0,255,149,0.05) 0%,transparent 50%);}
  .hero-grid{position:absolute;inset:0;opacity:.035;background-image:linear-gradient(rgba(30,135,240,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(30,135,240,.6) 1px,transparent 1px);background-size:60px 60px;}
  .hero-vline{position:absolute;top:0;left:60px;bottom:0;width:1px;background:linear-gradient(to bottom,transparent 0%,rgba(30,135,240,.25) 40%,transparent 100%);}

  .hero-eyebrow{font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:22px;display:flex;align-items:center;gap:14px;opacity:0;animation:fadeUp .8s .2s forwards;}
  .hero-eyebrow::before{content:'';width:36px;height:1px;background:var(--accent);}

  .hero-intro{display:flex;align-items:stretch;gap:36px;margin-bottom:28px;}
  .hero-photo{width:45vw;flex-shrink:0;border-radius:14px;background:linear-gradient(135deg,rgba(30,135,240,.15),rgba(0,255,149,.1));border:2px solid rgba(30,135,240,.3);overflow:hidden;opacity:0;animation:fadeUp .9s .35s forwards;}
  .hero-photo img{width:100%;height:100%;object-fit:cover;display:block;}
  .hero-photo::before{display:none;}
  .hero-text{display:flex;flex-direction:column;justify-content:center;}
  h1{font-size:clamp(46px,7vw,86px);font-weight:800;line-height:.94;letter-spacing:-3px;margin-bottom:0;opacity:0;animation:fadeUp .9s .35s forwards;}
  h1 .grad{background:-webkit-linear-gradient(45deg,#1e87f0,#00ff95 80%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
  h1 .dim{color:var(--text2);-webkit-text-fill-color:var(--text2);}

  .hero-desc{max-width:490px;font-size:15px;font-weight:300;color:var(--text2);line-height:1.85;margin-top:20px;margin-bottom:0;opacity:0;animation:fadeUp .9s .5s forwards;}
  .hero-desc strong{color:var(--text);font-weight:600;}

  .hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px;opacity:0;animation:fadeUp .9s .65s forwards;}
  .btn-p{padding:12px 28px;background:var(--accent);color:#fff;font-weight:600;font-size:13px;font-family:'Poppins',sans-serif;border:none;border-radius:4px;cursor:pointer;text-decoration:none;letter-spacing:.04em;transition:background .2s,transform .15s;display:inline-block;}
  .btn-p:hover{background:var(--accent2);transform:translateY(-2px);}
  .btn-g{padding:12px 28px;background:transparent;color:var(--text);font-weight:400;font-size:13px;font-family:'Poppins',sans-serif;border:1px solid var(--border-h);border-radius:4px;cursor:pointer;text-decoration:none;letter-spacing:.04em;transition:border-color .2s,color .2s;display:inline-block;}
  .btn-g:hover{border-color:var(--accent);color:var(--accent);}

  .hero-scroll{position:absolute;right:60px;bottom:80px;font-size:10px;letter-spacing:.14em;color:var(--text3);text-transform:uppercase;writing-mode:vertical-rl;display:flex;align-items:center;gap:12px;opacity:0;animation:fadeUp 1s 1s forwards;}
  .hero-scroll::after{content:'';width:1px;height:48px;background:linear-gradient(to bottom,var(--accent),transparent);animation:scrl 2s 1.5s ease-in-out infinite;}

  /* SECCIÓN */
  .sec-lbl{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:18px;display:flex;align-items:center;gap:10px;font-weight:600;}
  .sec-lbl::before{content:'';width:20px;height:2px;background:var(--accent);}
  h2{font-size:clamp(26px,4vw,46px);font-weight:800;line-height:1.05;letter-spacing:-1.5px;margin-bottom:22px;}

  /* SOBRE */
  #sobre{padding:120px 60px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start;border-top:1px solid var(--border);}
  .about-body p{color:var(--text2);font-weight:300;line-height:1.9;margin-bottom:16px;font-size:14px;}
  .about-body p strong{color:var(--text);font-weight:600;}
  .stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);margin-top:36px;}
  .stat{background:var(--bg);padding:22px 18px;transition:background .2s;}
  .stat:hover{background:var(--bg3);}
  .stat-n{font-size:30px;font-weight:800;color:var(--accent);letter-spacing:-1px;line-height:1;margin-bottom:4px;}
  .stat-l{font-size:11px;color:var(--text3);font-weight:400;}
  .tools-wrap{margin-top:36px;}
  .tools-lbl{font-size:10px;color:var(--text3);letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px;font-weight:600;}
  .tools{display:flex;flex-wrap:wrap;gap:7px;}
  .tool{font-size:11px;padding:5px 13px;font-family:'Poppins',sans-serif;border:1px solid rgba(30,135,240,.3);color:var(--text2);border-radius:20px;transition:all .2s;font-weight:400;}
  .tool:hover{border-color:var(--accent);color:var(--accent);background:rgba(30,135,240,.08);}

  /* CASOS */
  #casos{padding:120px 60px;border-top:1px solid var(--border);}
  .ch{margin-bottom:52px;}
  .cg{display:grid;gap:1px;background:var(--border);border:1px solid var(--border);}
  .caso{background:var(--bg);padding:44px;display:grid;grid-template-columns:90px 1fr;gap:36px;transition:background .3s;cursor:pointer;text-decoration:none;color:inherit;}
  .caso:hover{background:var(--bg3);}
  .cn{font-size:58px;font-weight:800;color:var(--border-h);line-height:1;letter-spacing:-3px;align-self:start;transition:color .3s;}
  .caso:hover .cn{color:var(--accent);}
  .ccat{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:12px;font-weight:600;}
  .ctit{font-size:20px;font-weight:700;letter-spacing:-.5px;margin-bottom:12px;line-height:1.25;}
  .cdesc{color:var(--text2);font-weight:300;line-height:1.75;margin-bottom:18px;font-size:13px;}
  .ctags{display:flex;gap:7px;flex-wrap:wrap;}
  .ctag{font-size:11px;padding:4px 10px;background:rgba(30,135,240,.1);color:rgba(30,135,240,.9);border:1px solid rgba(30,135,240,.2);border-radius:3px;font-weight:500;}
  .carr{margin-top:18px;font-size:12px;color:var(--accent);font-weight:600;display:flex;align-items:center;gap:8px;letter-spacing:.04em;transition:gap .2s;}
  .caso:hover .carr{gap:14px;}

  /* STACK */
  #stack{padding:120px 60px;border-top:1px solid var(--border);}
  .sg{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);margin-top:52px;}
  .si{background:var(--bg);padding:30px 26px;transition:background .2s;}
  .si:hover{background:var(--bg3);}
  .si-icon{font-size:24px;margin-bottom:12px;}
  .si-name{font-size:15px;font-weight:700;margin-bottom:7px;}
  .si-desc{font-size:12px;color:var(--text3);line-height:1.65;font-weight:300;}

  /* CONTACTO */
  #contacto{padding:120px 60px;border-top:1px solid var(--border);display:grid;grid-template-columns:1fr 1fr;gap:80px;}
  .ci p{color:var(--text2);font-weight:300;line-height:1.85;margin-bottom:28px;font-size:14px;}
  .cls{display:flex;flex-direction:column;}
  .cl{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--text2);text-decoration:none;padding:14px 0;border-bottom:1px solid var(--border);transition:color .2s,border-color .2s,padding-left .2s;}
  .cl:hover{color:var(--accent);border-color:var(--accent);padding-left:8px;}
  .cl-icon{font-size:15px;width:20px;text-align:center;opacity:.7;}
  .cbox{border:1px solid var(--border);border-left:3px solid var(--accent);padding:36px;border-radius:4px;background:var(--bg2);align-self:center;}
  .cbox h3{font-size:19px;font-weight:700;margin-bottom:12px;letter-spacing:-.5px;line-height:1.3;}
  .cbox p{color:var(--text2);font-weight:300;margin-bottom:22px;font-size:13px;line-height:1.8;}

  /* FOOTER */
  footer{padding:26px 60px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;}
  .fc{font-size:11px;color:var(--text3);}
  .fl{font-size:11px;color:var(--text3);display:flex;align-items:center;gap:6px;}
  .fd{width:6px;height:6px;background:var(--green);border-radius:50%;animation:pulse 2s infinite;}

  /* CHATBOT */
  .chat-fab{position:fixed;bottom:28px;right:28px;z-index:9999;width:50px;height:50px;border-radius:4px;background:var(--accent);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 28px rgba(30,135,240,.5);transition:background .2s,transform .2s;}
  .chat-fab:hover{background:var(--accent2);transform:scale(1.06);}
  .chat-fab svg{width:22px;height:22px;fill:#fff;}
  .cbadge{position:absolute;top:-5px;right:-5px;width:17px;height:17px;background:#f0506e;border-radius:50%;border:2px solid var(--bg);font-size:9px;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-family:'Poppins',sans-serif;}
  .chat-win{position:fixed;bottom:90px;right:28px;z-index:9998;width:365px;height:520px;background:var(--bg2);border:1px solid var(--border-h);border-radius:6px;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(0,0,0,.65);transform:translateY(14px) scale(.97);opacity:0;pointer-events:none;transition:transform .28s cubic-bezier(.23,1,.32,1),opacity .28s;font-family:'Poppins',sans-serif;}
  .chat-win.open{transform:translateY(0) scale(1);opacity:1;pointer-events:all;}
  .ch-head{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;background:var(--bg3);border-radius:6px 6px 0 0;flex-shrink:0;}
  .ch-info{display:flex;align-items:center;gap:10px;}
  .ch-av{width:32px;height:32px;background:var(--accent);border-radius:4px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:11px;color:#fff;flex-shrink:0;}
  .ch-name{font-size:12px;font-weight:700;margin:0;}
  .ch-sub{font-size:10px;color:var(--text3);margin:0;}
  .ch-status{font-size:10px;color:var(--green);display:flex;align-items:center;gap:4px;font-weight:600;}
  .ch-status::before{content:'';width:5px;height:5px;background:var(--green);border-radius:50%;animation:pulse 2s infinite;display:inline-block;}
  .ch-close{background:none;border:none;cursor:pointer;color:var(--text3);font-size:19px;line-height:1;transition:color .2s;}
  .ch-close:hover{color:var(--text);}
  .ch-msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:9px;scroll-behavior:smooth;}
  .ch-msgs::-webkit-scrollbar{width:3px;}
  .ch-msgs::-webkit-scrollbar-thumb{background:var(--border-h);border-radius:2px;}
  .msg{max-width:84%;font-size:12px;line-height:1.6;padding:8px 12px;border-radius:6px;animation:fadeUp .25s ease;font-weight:300;}
  .mbot{background:var(--bg3);color:var(--text);align-self:flex-start;border-radius:3px 7px 7px 7px;}
  .mbot a{color:var(--accent);}
  .musr{background:var(--accent);color:#fff;align-self:flex-end;font-weight:500;border-radius:7px 3px 7px 7px;}
  .mtyp{background:var(--bg3);align-self:flex-start;padding:9px 13px;border-radius:3px 7px 7px 7px;display:flex;gap:4px;align-items:center;}
  .mtyp span{width:5px;height:5px;background:var(--text3);border-radius:50%;animation:typ 1.1s infinite;}
  .mtyp span:nth-child(2){animation-delay:.18s;}
  .mtyp span:nth-child(3){animation-delay:.36s;}
  .ch-sugs{padding:0 12px 9px;display:flex;flex-wrap:wrap;gap:5px;flex-shrink:0;}
  .sug{font-size:11px;padding:4px 11px;border:1px solid rgba(30,135,240,.4);color:rgba(30,135,240,.9);background:rgba(30,135,240,.08);border-radius:20px;cursor:pointer;font-family:'Poppins',sans-serif;font-weight:500;transition:all .18s;white-space:nowrap;}
  .sug:hover{background:rgba(30,135,240,.2);border-color:var(--accent);color:#fff;}
  .ch-irow{padding:10px 12px;border-top:1px solid var(--border);display:flex;gap:7px;flex-shrink:0;}
  .ch-inp{flex:1;background:var(--bg3);border:1px solid var(--border);color:var(--text);font-family:'Poppins',sans-serif;font-size:11px;font-weight:300;padding:8px 11px;border-radius:4px;outline:none;resize:none;height:36px;transition:border-color .2s;}
  .ch-inp::placeholder{color:var(--text3);}
  .ch-inp:focus{border-color:var(--accent);}
  .ch-send{width:36px;height:36px;background:var(--accent);border:none;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0;}
  .ch-send:hover{background:var(--accent2);}
  .ch-send svg{width:14px;height:14px;fill:#fff;}

  /* REVEAL */
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease;}
  .reveal.visible{opacity:1;transform:translateY(0);}

  /* ANIMATIONS */
  @keyframes fadeUp{from{opacity:0;transform:translateY(13px);}to{opacity:1;transform:translateY(0);}}
  @keyframes scrl{0%,100%{opacity:.3;}50%{opacity:1;}}
  @keyframes typ{0%,60%,100%{transform:translateY(0);opacity:.4;}30%{transform:translateY(-4px);opacity:1;}}
  @keyframes pulse{0%,100%{opacity:1;}50%{opacity:.3;}}

  /* RESPONSIVE */
  @media(max-width:960px){
    nav{padding:14px 20px;}
    .nav-links{display:none;}
    #hero{padding:0 20px 60px;}
    .hero-intro{flex-direction:column;gap:24px;}
    .hero-photo{width:100%;height:260px;border-radius:10px;}
    #sobre,#contacto{padding:72px 20px;grid-template-columns:1fr;gap:44px;}
    #casos,#stack{padding:72px 20px;}
    .sg{grid-template-columns:1fr 1fr;}
    .caso{grid-template-columns:1fr;gap:10px;padding:24px 18px;}
    .cn{font-size:44px;}
    footer{padding:18px 20px;flex-direction:column;gap:8px;}
    .chat-win{width:calc(100vw - 28px);right:14px;bottom:80px;}
    .chat-fab{right:14px;bottom:14px;}
  }

/* ===== MODAL ===== */
.modal-overlay{position:fixed;inset:0;z-index:2000;background:rgba(3,19,36,0.85);backdrop-filter:blur(6px);opacity:0;pointer-events:none;transition:opacity .3s ease;}
.modal-overlay.active{opacity:1;pointer-events:all;}

.modal{position:fixed;top:0;right:0;bottom:0;z-index:2001;width:min(780px,100vw);background:var(--bg2);border-left:1px solid var(--border-h);transform:translateX(100%);transition:transform .38s cubic-bezier(.23,1,.32,1);overflow-y:auto;display:flex;flex-direction:column;}
.modal::-webkit-scrollbar{width:4px;}
.modal::-webkit-scrollbar-thumb{background:var(--border-h);border-radius:2px;}
.modal.active{transform:translateX(0);}

.modal-inner{padding:56px 60px 80px;position:relative;min-height:100%;}

.modal-close{position:sticky;top:0;float:right;margin-bottom:16px;width:38px;height:38px;background:var(--bg3);border:1px solid var(--border-h);color:var(--text2);border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,color .2s;flex-shrink:0;z-index:10;}
.modal-close:hover{background:var(--accent);color:#fff;border-color:var(--accent);}
.modal-close svg{width:18px;height:18px;}

.mc-header{margin-bottom:48px;padding-top:8px;}
.mc-cat{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.mc-cat::before{content:'';width:20px;height:2px;background:var(--accent);}
.mc-title{font-size:clamp(20px,4vw,34px);font-weight:800;letter-spacing:-1px;line-height:1.1;margin-bottom:20px;}
.mc-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px;}
.mc-tag{font-size:11px;padding:5px 12px;background:rgba(30,135,240,.1);color:rgba(30,135,240,.9);border:1px solid rgba(30,135,240,.25);border-radius:3px;font-weight:500;}
.mc-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);}
.mc-meta-item{background:var(--bg3);padding:16px 18px;}
.mc-meta-label{font-size:10px;color:var(--text3);text-transform:uppercase;letter-spacing:.1em;font-weight:600;margin-bottom:4px;}
.mc-meta-val{font-size:13px;font-weight:600;color:var(--text);}

.mc-section{margin-bottom:48px;}
.mc-section-title{font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;}
.mc-section-title span{background:var(--accent);color:#fff;font-size:10px;padding:2px 8px;border-radius:2px;}
.mc-p{font-size:14px;color:var(--text2);font-weight:300;line-height:1.85;margin-bottom:14px;}
.mc-p strong{color:var(--text);font-weight:600;}

.mc-problems{display:grid;gap:10px;margin-top:16px;}
.mc-problem{background:var(--bg3);border:1px solid var(--border);border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 4px 4px 0;display:grid;grid-template-columns:28px 1fr;gap:12px;align-items:start;}
.mc-problem-num{font-size:11px;font-weight:700;color:var(--accent);padding-top:2px;}
.mc-problem-text{font-size:13px;color:var(--text2);font-weight:300;line-height:1.6;}
.mc-problem-text strong{color:var(--text);font-weight:600;}

.mc-phases{display:grid;gap:10px;margin-top:16px;}
.mc-phase{background:var(--bg3);border:1px solid var(--border);padding:18px 20px;border-radius:4px;display:grid;grid-template-columns:80px 1fr;gap:16px;align-items:start;}
.mc-phase-label{font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);background:rgba(30,135,240,.12);border:1px solid rgba(30,135,240,.25);padding:6px 10px;border-radius:3px;text-align:center;}
.mc-phase-title{font-size:14px;font-weight:600;margin-bottom:6px;}
.mc-phase-desc{font-size:12px;color:var(--text3);font-weight:300;line-height:1.65;}

.mc-arch{background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:24px;margin-top:16px;}
.mc-arch-row{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text2);padding:8px 0;border-bottom:1px solid var(--border);flex-wrap:wrap;}
.mc-arch-row:last-child{border-bottom:none;}
.mc-arch-node{font-size:11px;font-weight:600;padding:4px 10px;border-radius:3px;white-space:nowrap;flex-shrink:0;}
.mc-arch-node.blue{background:rgba(30,135,240,.15);color:#1e87f0;border:1px solid rgba(30,135,240,.3);}
.mc-arch-node.green{background:rgba(0,255,149,.08);color:#00ff95;border:1px solid rgba(0,255,149,.2);}
.mc-arch-node.gray{background:rgba(255,255,255,.05);color:var(--text2);border:1px solid var(--border);}
.mc-arch-arrow{color:var(--text3);font-size:14px;}
.mc-arch-desc{font-size:11px;color:var(--text3);font-weight:300;}

.mc-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);margin-top:16px;}
.mc-metric{background:var(--bg3);padding:20px 18px;text-align:center;}
.mc-metric-val{font-size:28px;font-weight:800;color:var(--accent);letter-spacing:-1px;line-height:1;margin-bottom:4px;}
.mc-metric-lbl{font-size:11px;color:var(--text3);font-weight:300;line-height:1.4;}

.mc-learnings{display:grid;gap:10px;margin-top:16px;}
.mc-learning{background:var(--bg3);padding:14px 18px;border-radius:4px;border:1px solid var(--border);font-size:13px;color:var(--text2);font-weight:300;line-height:1.65;display:flex;gap:12px;align-items:start;}
.mc-learning::before{content:'↗';color:var(--accent);font-weight:700;flex-shrink:0;}

.mc-cta{margin-top:56px;padding:32px;background:var(--bg3);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:0 4px 4px 0;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;}
.mc-cta p{font-size:14px;color:var(--text2);font-weight:300;margin:0;}
.mc-cta p strong{color:var(--text);font-weight:600;}

@media(max-width:760px){
  .modal{width:100vw;}
  .modal-inner{padding:40px 20px 60px;}
  .mc-meta{grid-template-columns:1fr 1fr;}
  .mc-metrics{grid-template-columns:1fr 1fr;}
  .mc-phase{grid-template-columns:1fr;}
  .mc-cta{flex-direction:column;}
}