:root{
  --bg:#0a1428; --bg2:#0f1d38; --line:#1f3a63; --text:#d7e3f4; --muted:#8ea3c0;
  --cyan:#7fe0ff; --yellow:#fde68a; --ink:#0a1428;
  --head:"Space Grotesk",system-ui,sans-serif; --body:"Inter",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--text);font:400 1rem/1.65 var(--body);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.25rem}
section.wrap{padding-top:5rem;padding-bottom:1rem}
h1,h2{font-family:var(--head);line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:700;max-width:18ch}
h2{font-size:1.9rem;font-weight:700;margin-bottom:1.25rem;padding-bottom:.6rem;border-bottom:1px solid var(--line)}
.sub{color:var(--muted);margin:-.5rem 0 1.25rem}
.lead{color:var(--muted);max-width:46ch;margin:1.25rem 0 1.75rem;font-size:1.1rem}
.skip{position:absolute;left:-999px}.skip:focus{left:1rem;top:1rem;background:var(--yellow);color:var(--ink);padding:.5rem 1rem;z-index:99}

/* cabecera */
.top{position:sticky;top:0;z-index:50;background:rgba(10,20,40,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font:700 1.15rem var(--head)}.logo span{color:var(--cyan)}
nav{display:flex;align-items:center;gap:.5rem}
nav>a:not(.btn),.dd-btn{padding:.5rem .9rem;border:1px solid transparent;border-radius:6px;color:var(--text);font:500 .95rem var(--body);background:none;cursor:pointer}
nav>a:not(.btn):hover,.dd-btn:hover,.dd.open .dd-btn{border-color:var(--cyan);color:var(--cyan)}
.dd{position:relative}
.dd-btn::after{content:"";display:inline-block;width:.4rem;height:.4rem;margin-left:.5rem;border:solid currentColor;border-width:0 2px 2px 0;transform:translateY(-2px) rotate(45deg)}
.dd-list{position:absolute;right:0;top:calc(100% + 6px);min-width:180px;background:var(--bg2);border:1px solid var(--cyan);border-radius:8px;padding:.35rem;display:none}
.dd.open .dd-list{display:block}
.dd-list a{display:block;padding:.5rem .75rem;border-radius:5px;font-size:.95rem}
.dd-list a:hover{background:var(--line);color:var(--cyan)}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:.55rem;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--cyan);margin:4px 0;transition:.2s}
.burger[aria-expanded=true] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded=true] span:nth-child(2){opacity:0}
.burger[aria-expanded=true] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* botones */
.btn{display:inline-block;padding:.65rem 1.25rem;border-radius:6px;font:700 .95rem var(--head);border:1px solid transparent;transition:.15s}
.btn-cta{background:var(--yellow);color:var(--ink)}
.btn-cta:hover{background:#fff3b8;box-shadow:0 0 0 3px rgba(253,230,138,.25)}
.btn-ghost{border-color:var(--cyan);color:var(--cyan)}
.btn-ghost:hover{background:rgba(127,224,255,.1)}
.actions{display:flex;gap:.75rem;flex-wrap:wrap}

/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center;padding-top:4.5rem!important;padding-bottom:1rem}
.term{background:#071022;border:1px solid var(--cyan);border-radius:10px;box-shadow:0 0 0 4px rgba(127,224,255,.08),0 0 40px rgba(127,224,255,.08);overflow:hidden}
.term-head{display:flex;align-items:center;gap:.4rem;padding:.6rem .9rem;border-bottom:1px solid var(--line);color:var(--muted);font:.8rem ui-monospace,Menlo,monospace}
.term-head i{width:9px;height:9px;border-radius:50%;border:1px solid var(--muted)}
.term-head span{margin-left:.5rem}
.term pre{padding:1rem 1.1rem;font:.88rem/1.7 ui-monospace,Menlo,Consolas,monospace;overflow-x:auto;color:var(--text)}
.term b{color:var(--yellow);font-weight:400}.term em{color:var(--cyan);font-style:normal}
.cursor{display:inline-block;width:.6ch;height:1.1em;background:var(--cyan);vertical-align:text-bottom;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* sobre mí */
.about{display:grid;gap:1rem;max-width:68ch}
.skills{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}
.skills li{border:1px solid var(--line);border-radius:6px;padding:.3rem .75rem;font-size:.9rem;color:var(--cyan);background:var(--bg2)}

/* prácticas */
.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.25rem}
.chip{background:none;border:1px solid var(--line);color:var(--text);border-radius:999px;padding:.35rem 1rem;font:500 .9rem var(--body);cursor:pointer}
.chip:hover{border-color:var(--cyan);color:var(--cyan)}
.chip[aria-pressed=true]{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:1rem}
.card{display:flex;flex-direction:column;gap:.6rem;background:var(--bg2);border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:8px;padding:1.2rem;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--cyan);transform:translateY(-2px)}
.card h3{font:700 1.1rem var(--head)}
.card p{color:var(--muted);font-size:.93rem;flex:1}
.meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem}
.badge{background:var(--yellow);color:var(--ink);border-radius:4px;padding:.1rem .55rem;font-weight:500}
.fmt{color:var(--cyan)}

/* contacto */
.links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.link{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:8px;padding:1.2rem;font:700 1.15rem var(--head);background:var(--bg2);transition:.15s}
.link small{font:400 .9rem var(--body);color:var(--muted);margin-top:.25rem}
.link:hover{border-color:var(--cyan);color:var(--cyan)}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;margin-top:5rem;padding-top:1.5rem;padding-bottom:2rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}

/* móvil */
@media (max-width:760px){
  .hero{grid-template-columns:1fr}
  .burger{display:block}
  nav{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg2);border-bottom:1px solid var(--cyan);padding:.75rem 1.25rem 1rem}
  nav.open{display:flex}
  .dd-list{position:static;border:0;border-left:2px solid var(--line);border-radius:0;margin:.25rem 0 .25rem .9rem;background:none}
  .dd-btn{width:100%;text-align:left}
  .btn-cta{text-align:center}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}