/* Tema claro, estilo “papel” */
:root{
  --bg:#f7f7fb;
  --panel:#ffffff;
  --panel2:#fbfbff;
  --text:#111827;
  --muted:#4b5563;
  --border:rgba(17,24,39,.12);
  --brand:#2563eb;
  --brand2:#7c3aed;
  --shadow:0 12px 26px rgba(17,24,39,.10);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 20% -10%, rgba(124,58,237,.10), transparent 60%),
    radial-gradient(900px 600px at 90% 0%, rgba(37,99,235,.10), transparent 55%),
    linear-gradient(180deg, var(--bg), #ffffff);
  line-height:1.55;
}

a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible{outline:2px solid rgba(37,99,235,.35);outline-offset:2px;border-radius:8px}

.container{max-width:1100px;margin:0 auto;padding:0 18px}

.top{
  position:sticky;top:0;z-index:10;
  background:rgba(255,255,255,.78);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--border);
}
.top .container{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 18px}

.brand__title{font-weight:750;letter-spacing:.2px}
.brand__subtitle{color:var(--muted);font-size:14px}

.nav{display:flex;gap:14px;flex-wrap:wrap}
.nav a{padding:8px 10px;border:1px solid transparent;border-radius:10px;color:var(--muted)}
.nav a:hover{border-color:var(--border);color:var(--text);text-decoration:none;background:rgba(17,24,39,.03)}

.hero{padding:54px 0 24px}
.hero h1{font-size:42px;line-height:1.08;margin:0 0 14px;letter-spacing:-.7px}
.hero p{max-width:80ch;color:var(--muted);margin:0 0 12px}
.hero__meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--text)}
.hero__meta a{text-decoration:underline;text-decoration-color:rgba(37,99,235,.35)}

.section{padding:34px 0}
.section--alt{background:linear-gradient(180deg, rgba(37,99,235,.05), rgba(124,58,237,.03));border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section h2{margin:0 0 10px;font-size:26px}
.section p{margin:0 0 14px;color:var(--muted);max-width:95ch}

.grid{display:grid;grid-template-columns:repeat(3, minmax(0,1fr));gap:14px}
.card{
  background:linear-gradient(180deg, var(--panel), var(--panel2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:16px 16px 14px;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:16px;
  padding:1px;
  background:linear-gradient(90deg, rgba(37,99,235,.45), rgba(124,58,237,.35), rgba(37,99,235,.30));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
}
.card--accent-blue::before{background:linear-gradient(90deg, rgba(37,99,235,.55), rgba(37,99,235,.18))}
.card--accent-violet::before{background:linear-gradient(90deg, rgba(124,58,237,.50), rgba(124,58,237,.16))}
.card--accent-mix::before{background:linear-gradient(90deg, rgba(37,99,235,.45), rgba(124,58,237,.35), rgba(37,99,235,.22))}
.card h3{margin:0 0 8px;font-size:16px}
.card ul{margin:0;padding-left:18px;color:var(--text)}
.card li{margin:8px 0;color:var(--muted)}

.muted{color:var(--muted)}

.projects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:10px}
.project{
  background:linear-gradient(180deg, var(--panel), var(--panel2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:16px;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.project::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:linear-gradient(180deg, rgba(37,99,235,.55), rgba(124,58,237,.45));
}
.project > *{position:relative}
.project{padding-left:18px}
.project__head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.project h3{margin:0;font-size:18px}
.h3row{display:flex;align-items:center;gap:10px}
.icon{
  width:18px;height:18px;flex:0 0 18px;
  color:rgba(37,99,235,.9);
}
.icon--violet{color:rgba(124,58,237,.9)}
.icon--muted{color:rgba(17,24,39,.55)}
.badge{
  font-size:12px;
  color:var(--text);
  border:1px solid var(--border);
  padding:6px 10px;
  border-radius:999px;
  background:linear-gradient(90deg, rgba(37,99,235,.10), rgba(124,58,237,.10));
  white-space:nowrap;
}
.project p{margin:10px 0;color:var(--muted)}
.check{margin:10px 0 0;padding-left:18px}
.check li{margin:8px 0;color:var(--muted)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:12px;
  border:1px solid rgba(37,99,235,.25);
  background:linear-gradient(90deg, rgba(37,99,235,.10), rgba(124,58,237,.10));
  text-decoration:none;
}
.btn:hover{text-decoration:none;border-color:rgba(37,99,235,.45)}
.project__cta{margin-top:12px}

.contact{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:12px}
.contact__item{border:1px solid var(--border);border-radius:16px;padding:14px;background:linear-gradient(180deg, var(--panel), var(--panel2))}
.label{font-size:12px;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.08em}

.footer{padding:22px 0;border-top:1px solid var(--border)}

@media (max-width: 980px){
  .grid{grid-template-columns:1fr}
  .projects{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .hero h1{font-size:34px}
}