:root{
    --bg-0:#0a0a0a;
    --bg-1:#0d0f13;
    --bg-2:#111418;
    --line:#1c2129;
    --text-hi:#eef2f7;
    --text-mid:#a7b0bd;
    --text-low:#5b6472;
    --blue:#1e90ff;
    --cyan:#00d2ff;
    --blue-deep:#0a2a4d;
    --blue-glow:rgba(30,144,255,.35);
    --cyan-glow:rgba(0,210,255,.30);
    --radius:14px;
    --ease:cubic-bezier(.22,1,.36,1);
    --pad-x:clamp(28px,5.5vw,110px);
  }

  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  ::selection{background:var(--blue);color:#00131f;}

  body{
    background:var(--bg-0);
    color:var(--text-mid);
    font-family:'Inter',sans-serif;
    overflow-x:hidden;
    position:relative;
  }

  body.locked{overflow:hidden;height:100vh;}

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; scroll-behavior:auto !important;}
  }

  a{color:inherit;text-decoration:none;}
  ul{list-style:none;}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px;}

  /* ---------- background canvas ---------- */
  #net{
    position:fixed;inset:0;z-index:0;
    background:
      radial-gradient(ellipse 60% 40% at 15% 10%, rgba(30,144,255,.08), transparent 60%),
      radial-gradient(ellipse 50% 35% at 90% 85%, rgba(0,210,255,.06), transparent 60%),
      var(--bg-0);
  }

  .noise{
    position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.025;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  }

  /* ---------- preloader ---------- */
  #preloader{
    position:fixed;inset:0;z-index:9999;
    background:var(--bg-0);
    display:flex;align-items:center;justify-content:center;
    flex-direction:column;gap:22px;
    transition:opacity .7s var(--ease), visibility .7s var(--ease);
  }
  #preloader.done{opacity:0;visibility:hidden;}

  .pre-logo{
    font-family:'Fira Code',monospace;
    font-size:clamp(28px,5vw,44px);
    color:var(--text-hi);
    letter-spacing:.5px;
    display:flex;
  }
  .pre-logo .chev{color:var(--blue);opacity:0;animation:chevIn .4s var(--ease) .1s forwards;}
  .pre-logo .txt{opacity:0;transform:translateY(6px);animation:chevIn .4s var(--ease) .35s forwards;}
  .pre-logo .cursor{
    color:var(--cyan);
    animation:blink 1s steps(1) infinite;
    margin-left:2px;
  }
  @keyframes chevIn{to{opacity:1;transform:translateY(0);}}
  @keyframes blink{50%{opacity:0;}}

  .pre-bar{
    width:220px;height:2px;background:var(--line);border-radius:2px;overflow:hidden;position:relative;
  }
  .pre-bar::after{
    content:'';position:absolute;inset:0;width:0%;
    background:linear-gradient(90deg,var(--blue),var(--cyan));
    box-shadow:0 0 12px var(--cyan-glow);
    animation:load 1.6s var(--ease) forwards;
  }
  @keyframes load{to{width:100%;}}

  .pre-status{
    font-family:'Fira Code',monospace;
    font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text-low);
  }

  /* ---------- header ---------- */
  header{
    position:fixed;top:0;left:0;right:0;z-index:100;
    display:flex;align-items:center;justify-content:space-between;
    padding:22px var(--pad-x);
    backdrop-filter:blur(14px) saturate(140%);
    background:rgba(10,10,10,.55);
    border-bottom:1px solid transparent;
    transition:border-color .4s var(--ease), background .4s var(--ease);
  }
  header.scrolled{
    border-bottom-color:var(--line);
    background:rgba(10,10,10,.78);
  }

  .logo{
    display:flex;align-items:baseline;gap:2px;
    font-weight:600;font-size:21px;
    cursor:pointer;user-select:none;
  }
  .logo .rodrigo{color:var(--text-hi);font-weight:500;letter-spacing:.2px;}
  .logo .dev{
    font-family:'Fira Code',monospace;
    font-weight:700;
    background:linear-gradient(120deg,var(--blue),var(--cyan));
    -webkit-background-clip:text;background-clip:text;color:transparent;
    position:relative;padding-left:2px;
  }
  .logo .dev::after{
    content:'_';
    -webkit-text-fill-color:var(--cyan);
    animation:blink 1.1s steps(1) infinite;
  }
  .logo .bracket{color:var(--blue);font-family:'Fira Code',monospace;font-weight:500;opacity:.8;}

  nav ul{display:flex;gap:clamp(20px,3vw,40px);}
  nav a{
    position:relative;font-size:14.5px;font-weight:500;color:var(--text-mid);
    padding:6px 2px;letter-spacing:.2px;
    transition:color .3s;
  }
  nav a::before{
    content:'';position:absolute;left:50%;bottom:0;height:1.5px;width:0;
    background:linear-gradient(90deg,var(--blue),var(--cyan));
    transition:width .35s var(--ease), left .35s var(--ease);
    box-shadow:0 0 8px var(--cyan-glow);
  }
  nav a:hover, nav a:focus-visible{color:var(--text-hi);}
  nav a:hover::before, nav a:focus-visible::before{left:0;width:100%;}

  .nav-toggle{display:none;}

  /* ---------- generic layout ---------- */
  section{
    position:relative;z-index:2;
    padding:140px var(--pad-x) 40px;
    width:100%;
  }

  .eyebrow{
    font-family:'Fira Code',monospace;
    font-size:12.5px;color:var(--blue);letter-spacing:2px;text-transform:uppercase;
    display:flex;align-items:center;gap:10px;margin-bottom:18px;
  }
  .eyebrow::before{content:'';width:26px;height:1px;background:var(--blue);box-shadow:0 0 6px var(--blue-glow);}

  h2.section-title{
    font-size:clamp(28px,3.6vw,42px);
    color:var(--text-hi);font-weight:700;letter-spacing:-.5px;margin-bottom:16px;
  }
  .section-sub{max-width:560px;font-size:15.5px;line-height:1.7;color:var(--text-mid);margin-bottom:56px;}

  .reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease), transform .8s var(--ease);}
  .reveal.in{opacity:1;transform:translateY(0);}
  .reveal-delay-1{transition-delay:.08s;}
  .reveal-delay-2{transition-delay:.16s;}
  .reveal-delay-3{transition-delay:.24s;}

  /* ---------- hero ---------- */
  #hero{
    min-height:100vh;display:flex;flex-direction:column;justify-content:center;
    padding-top:120px;
  }
  .hero-tag{
    font-family:'Fira Code',monospace;font-size:13px;color:var(--cyan);
    letter-spacing:1.5px;margin-bottom:22px;display:flex;align-items:center;gap:10px;
  }
  .hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pulseDot 2s ease-in-out infinite;}
  @keyframes pulseDot{0%,100%{opacity:1;}50%{opacity:.35;}}

  .hero h1{
    font-size:clamp(38px,6.4vw,74px);
    line-height:1.08;font-weight:800;color:var(--text-hi);letter-spacing:-1.5px;
    max-width:920px;
  }
  .hero h1 .type-line{display:block;}
  .hero h1 .grad{
    background:linear-gradient(120deg,var(--blue),var(--cyan));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .caret{
    display:inline-block;width:3px;height:.85em;background:var(--cyan);
    margin-left:4px;vertical-align:-.1em;
    box-shadow:0 0 8px var(--cyan);
    animation:blink 0.9s steps(1) infinite;
  }

  .hero p.lead{
    max-width:540px;margin-top:26px;font-size:16.5px;line-height:1.75;color:var(--text-mid);
  }

  .hero-cta{display:flex;gap:18px;margin-top:42px;flex-wrap:wrap;}

  .btn{
    position:relative;overflow:hidden;
    font-weight:600;font-size:14.5px;letter-spacing:.3px;
    padding:14px 28px;border-radius:9px;cursor:pointer;border:1px solid transparent;
    display:inline-flex;align-items:center;gap:8px;
    transition:transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
  }
  .btn:active{transform:scale(.97);}
  .btn-primary{
    background:linear-gradient(120deg,var(--blue),var(--cyan));
    color:#00131f;
  }
  .btn-primary:hover{box-shadow:0 8px 34px -6px var(--cyan-glow), 0 0 0 1px var(--cyan-glow);transform:translateY(-2px);}
  .btn-ghost{
    background:transparent;border-color:var(--line);color:var(--text-hi);
  }
  .btn-ghost:hover{border-color:var(--blue);box-shadow:0 0 0 1px var(--blue-glow), 0 8px 30px -10px var(--blue-glow);transform:translateY(-2px);}

  .ripple{
    position:absolute;border-radius:50%;transform:scale(0);
    background:rgba(255,255,255,.5);
    animation:rippleAnim .6s linear;
    pointer-events:none;
  }
  .btn-primary .ripple{background:rgba(0,19,31,.35);}
  @keyframes rippleAnim{to{transform:scale(3.2);opacity:0;}}

  .hero-meta{
    margin-top:70px;display:flex;gap:48px;flex-wrap:wrap;
    font-family:'Fira Code',monospace;
  }
  .hero-meta div{border-left:1px solid var(--line);padding-left:16px;}
  .hero-meta .num{font-size:24px;color:var(--text-hi);font-weight:600;}
  .hero-meta .label{font-size:11.5px;color:var(--text-low);letter-spacing:1px;text-transform:uppercase;margin-top:4px;}

  /* ---------- about ---------- */
  .about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(48px,6vw,120px);align-items:start;}
  .about-text p{font-size:15.5px;line-height:1.85;color:var(--text-mid);margin-bottom:18px;max-width:480px;}
  .about-text strong{color:var(--text-hi);font-weight:600;}

  .stack-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;position:relative;}
  .stack-card{
    background:linear-gradient(160deg,var(--bg-2),var(--bg-1));
    border:1px solid var(--line);border-radius:var(--radius);
    padding:22px 20px;
    transition:transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  }
  .stack-card:hover{
    transform:translateY(-4px);
    border-color:var(--blue);
    box-shadow:0 16px 40px -14px var(--blue-glow);
  }
  .stack-card .tag{
    font-family:'Fira Code',monospace;font-size:11px;color:var(--cyan);letter-spacing:1px;
  }
  .stack-card h3{font-size:17px;color:var(--text-hi);margin:8px 0 6px;font-weight:600;}
  .stack-card p{font-size:13px;color:var(--text-low);line-height:1.6;}

  /* ---------- projects ---------- */
  .project-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:clamp(24px,2.4vw,40px);}
  .project-card{
    position:relative;
    background:var(--bg-1);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:30px 28px;
    overflow:hidden;
    transition:transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
  }
  .project-card::before{
    content:'';position:absolute;inset:-1px;border-radius:var(--radius);padding:1px;
    background:linear-gradient(140deg,var(--blue),transparent 40%);
    opacity:0;transition:opacity .45s var(--ease);
    -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite:xor;mask-composite:exclude;
    pointer-events:none;
  }
  .project-card:hover{
    transform:translateY(-8px);
    border-color:rgba(30,144,255,.5);
    background:linear-gradient(160deg,#12151a,var(--bg-1));
    box-shadow:0 24px 60px -20px var(--blue-glow);
  }
  .project-card:hover::before{opacity:1;}

  .proj-index{font-family:'Fira Code',monospace;font-size:12px;color:var(--text-low);margin-bottom:18px;}
  .project-card h3{font-size:20px;color:var(--text-hi);font-weight:600;margin-bottom:10px;}
  .project-card p{font-size:14px;line-height:1.7;color:var(--text-mid);margin-bottom:20px;}

  .proj-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;}
  .proj-tags span{
    font-family:'Fira Code',monospace;font-size:10.5px;color:var(--cyan);
    border:1px solid var(--blue-deep);background:rgba(30,144,255,.06);
    padding:4px 9px;border-radius:20px;letter-spacing:.4px;
  }

  .proj-links{display:flex;gap:24px;}
  .proj-links a{
    position:relative;font-size:13.5px;font-weight:600;color:var(--text-hi);
    padding-bottom:4px;display:inline-flex;align-items:center;gap:6px;
  }
  .proj-links a::after{
    content:'';position:absolute;left:50%;bottom:0;height:1px;width:0;
    background:linear-gradient(90deg,var(--blue),var(--cyan));
    transition:width .35s var(--ease), left .35s var(--ease);
  }
  .proj-links a:hover::after{left:0;width:100%;}
  .proj-links a:hover{color:var(--cyan);}

  /* ---------- contact ---------- */
  .contact-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(48px,7vw,140px);}
  .contact-links a{
    display:flex;justify-content:space-between;align-items:center;
    padding:20px 4px;border-bottom:1px solid var(--line);
    font-size:16px;color:var(--text-hi);font-weight:500;
    transition:padding-left .35s var(--ease), color .35s var(--ease);
  }
  .contact-links a span.arrow{color:var(--blue);transition:transform .35s var(--ease);}
  .contact-links a:hover{padding-left:10px;color:var(--cyan);}
  .contact-links a:hover span.arrow{transform:translateX(6px);}

  form{display:flex;flex-direction:column;gap:16px;}
  .field{display:flex;flex-direction:column;gap:8px;}
  .field label{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--text-low);font-family:'Fira Code',monospace;}
  .field input, .field textarea{
    background:var(--bg-1);border:1px solid var(--line);border-radius:8px;
    padding:13px 14px;color:var(--text-hi);font-family:'Inter',sans-serif;font-size:14.5px;
    transition:border-color .3s, box-shadow .3s;
  }
  .field input:focus, .field textarea:focus{
    outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-glow);
  }
  form .btn{align-self:flex-start;margin-top:6px;}

  /* ---------- footer ---------- */
  footer{
    position:relative;z-index:2;border-top:1px solid var(--line);
    padding:36px var(--pad-x);
    display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
  }
  footer .copy{font-size:13px;color:var(--text-low);font-family:'Fira Code',monospace;}
  .social{display:flex;gap:22px;}
  .social a{
    font-size:13px;color:var(--text-mid);font-weight:500;position:relative;
  }
  .social a::before{
    content:'';position:absolute;left:50%;bottom:-4px;height:1px;width:0;
    background:var(--cyan);transition:width .3s var(--ease), left .3s var(--ease);
  }
  .social a:hover{color:var(--cyan);}
  .social a:hover::before{left:0;width:100%;}

  /* ---------- about section: continuous network background ---------- */
  #sobre{overflow:hidden;}
  .about-network{
    position:absolute;top:0;left:0;width:100%;height:100%;z-index:0;
    opacity:.18;pointer-events:none;
  }
  #sobre .eyebrow, #sobre .section-title, #sobre .section-sub, #sobre .about-grid{
    position:relative;z-index:1;
  }

  /* ---------- hero two-column + visual ---------- */
  .hero-inner{
    display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(20px,3vw,60px);align-items:center;
  }
  .hero-visual{
    position:relative;height:520px;display:flex;align-items:center;justify-content:flex-end;
    width:100%;
    overflow:visible;
    -webkit-mask-image:linear-gradient(to right, black 82%, transparent 100%);
    mask-image:linear-gradient(to right, black 82%, transparent 100%);
  }
  .hero-visual svg{width:100%;height:100%;max-width:600px;overflow:visible;}
  .float-slow{animation:floatY 6s ease-in-out infinite;}
  .float-med{animation:floatY 4.5s ease-in-out infinite;}
  .float-fast{animation:floatY 3.4s ease-in-out infinite;}
  @keyframes floatY{0%,100%{transform:translateY(0);}50%{transform:translateY(-14px);}}
  .spin-slow{animation:spin 22s linear infinite;transform-origin:center;}
  @keyframes spin{to{transform:rotate(360deg);}}
  .pulse-glow{animation:pulseGlow 3s ease-in-out infinite;}
  @keyframes pulseGlow{0%,100%{opacity:.5;}50%{opacity:1;}}

  /* ---------- tech badges (hero) ---------- */
  .tech-badges{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
  .tech-badge{
    display:flex;align-items:center;gap:8px;
    padding:9px 16px 9px 12px;border-radius:30px;
    border:1px solid var(--line);background:rgba(255,255,255,.02);
    font-family:'Fira Code',monospace;font-size:12.5px;color:var(--text-mid);
    transition:border-color .35s var(--ease), box-shadow .35s var(--ease), transform .35s var(--ease), color .35s;
  }
  .tech-badge svg{width:18px;height:18px;flex-shrink:0;}
  .tech-badge:hover{
    border-color:var(--blue);color:var(--text-hi);transform:translateY(-3px);
    box-shadow:0 10px 26px -10px var(--blue-glow), 0 0 0 1px var(--blue-glow);
  }

  /* ---------- stack card logo ---------- */
  .stack-card{position:relative;}
  .stack-card .icon-wrap{
    width:38px;height:38px;margin-bottom:14px;
    display:flex;align-items:center;justify-content:center;
    border-radius:9px;border:1px solid var(--line);background:rgba(255,255,255,.02);
    transition:border-color .4s var(--ease), box-shadow .4s var(--ease), transform .4s var(--ease);
  }
  .stack-card .icon-wrap svg{width:20px;height:20px;transition:filter .4s var(--ease);}
  .stack-card:hover .icon-wrap{
    border-color:var(--cyan);
    box-shadow:0 0 22px -2px var(--cyan-glow), inset 0 0 14px -6px var(--cyan-glow);
    transform:scale(1.08);
  }
  .stack-card:hover .icon-wrap svg{filter:drop-shadow(0 0 6px var(--cyan));}

  /* ---------- floating social sidebar ---------- */
  .social-rail{
    position:fixed;left:28px;bottom:0;top:0;z-index:90;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:20px;pointer-events:none;
  }
  .social-rail a{
    pointer-events:auto;
    width:38px;height:38px;border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line);background:rgba(10,10,10,.4);backdrop-filter:blur(6px);
    color:var(--text-mid);
    transition:border-color .35s var(--ease), box-shadow .35s var(--ease), color .35s, transform .35s var(--ease);
  }
  .social-rail a svg{width:17px;height:17px;}
  .social-rail a:hover{
    color:var(--cyan);border-color:var(--cyan);transform:translateY(-3px) scale(1.06);
    box-shadow:0 0 20px -4px var(--cyan-glow);
  }
  .social-rail .rail-line{
    width:1px;height:70px;background:linear-gradient(var(--line), transparent);
  }
  @media (max-width:1180px){
    .social-rail{display:none;}
  }

  /* ---------- project card illustration layer ---------- */
  .project-card{isolation:isolate;}
  .proj-illustration{
    position:absolute;inset:0;z-index:0;pointer-events:none;
    opacity:.05;filter:saturate(0) brightness(1.1);
    transition:opacity .5s var(--ease), filter .5s var(--ease), transform .6s var(--ease);
    transform:scale(1.04);
  }
  .proj-illustration svg{width:100%;height:100%;}
  .project-card:hover .proj-illustration{
    opacity:.22;filter:saturate(1) brightness(1);transform:scale(1.1);
  }
  .project-card > *:not(.proj-illustration){position:relative;z-index:1;}

  /* ---------- responsive ---------- */
  @media (max-width:860px){
    .about-grid, .contact-wrap{grid-template-columns:1fr;gap:40px;}
    .hero-inner{grid-template-columns:1fr;}
    .hero-visual{height:280px;order:-1;-webkit-mask-image:none;mask-image:none;}
    .hero-visual svg{max-width:100%;}
    nav ul{gap:16px;}
  }
  @media (max-width:640px){
    nav{
      position:fixed;top:70px;right:0;height:calc(100vh - 70px);width:70%;max-width:300px;
      background:rgba(10,10,10,.97);backdrop-filter:blur(10px);
      transform:translateX(100%);transition:transform .4s var(--ease);
      border-left:1px solid var(--line);
      padding:40px 30px;
    }
    nav.open{transform:translateX(0);}
    nav ul{flex-direction:column;gap:26px;}
    .nav-toggle{
      display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;z-index:110;
    }
    .nav-toggle span{width:22px;height:2px;background:var(--text-hi);transition:transform .3s, opacity .3s;}
    .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
    .nav-toggle.open span:nth-child(2){opacity:0;}
    .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
    .stack-grid{grid-template-columns:1fr;}
    .hero-meta{gap:28px;}
  }