:root{ --fg:#e8ecff; --muted:#9aa3b2; --accent:#7c5cff; --card:#171a2b; --bg1:#0a1e3a; --bg2:#081428; --bg3:#06101f }
*{box-sizing:border-box}
html{ scroll-behavior:smooth }
body{ margin:0; font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial; color:var(--fg); background:linear-gradient(180deg, var(--bg1), var(--bg2) 60%, var(--bg3) 100%) ; overflow-x:hidden }

/* Parallax fijo */
.parallax{ position:fixed; inset:0; z-index:-2; pointer-events:none; overflow:hidden }
.layer{ position:absolute; inset:-10vh -10vw; will-change: transform; opacity:.7 }
.layer.l1{ background: radial-gradient(60vmax 60vmax at 10% -5%, rgba(0,122,255,.22), transparent 60%), radial-gradient(40vmax 40vmax at 90% 20%, rgba(0,219,222,.18), transparent 60%) }
.layer.l2{ background: radial-gradient(30vmax 30vmax at -10% 40%, rgba(124,92,255,.25), transparent 60%), radial-gradient(26vmax 26vmax at 110% 70%, rgba(0,122,255,.18), transparent 60%); mix-blend-mode:screen }
.layer.l3{ background: radial-gradient(18vmax 18vmax at 30% 120%, rgba(255,255,255,.08), transparent 60%), radial-gradient(16vmax 16vmax at 70% 110%, rgba(255,255,255,.06), transparent 60%) ; opacity:.5 }

/* Secciones apiladas pegajosas con superposición */
#stacker{ position:relative }
.panel{
  --reveal: 0;
  --z: 1;
  position: sticky; top: 0; height: 100vh; display:grid; place-items:center;
  z-index: var(--z);
  clip-path: polygon(0 0, 100% 0, 100% calc(var(--reveal)*1%), 0% calc(max(0, var(--reveal) - 10)*1%));
  transition: clip-path .2s ease-out;
  opacity: var(--alpha, 1);              /* << desvanecido del panel saliente */
}
.panel .inner{
  width:min(1100px, 92vw);
  max-height: calc(100vh - 140px);       /* << aprovecha altura útil */
  overflow:auto;                         /* << scroll interno si hay mucho contenido */
  padding:28px; border-radius:20px; background:var(--card);
  box-shadow:0 20px 80px rgba(0,0,0,.35); border:1px solid rgba(255,255,255,.08);
}


/* Navbar */
.topnav{ position:sticky; top:0; z-index:100; backdrop-filter:saturate(1.2) blur(8px);
  background:linear-gradient(180deg, rgba(5,15,30,.75), rgba(5,15,30,.35));
  border-bottom:1px solid rgba(255,255,255,.08); display:flex; align-items:center; justify-content:space-between; padding:10px 20px }
.topnav .brand{font-weight:900; letter-spacing:.6px}.topnav .brand span{color:var(--accent)}
.topnav .links{display:flex; gap:16px; flex-wrap:wrap}
.topnav a{color:var(--fg); text-decoration:none; opacity:.85; padding:8px 10px; border-radius:10px}
.topnav a:hover, .topnav a.active{ background:rgba(124,92,255,.15); opacity:1 }

/* Hero */
.hero{ display:grid; grid-template-columns:240px 1fr; gap:32px; align-items:center }
.hero .avatar{ width:100%; max-width:220px; border-radius:18px; border:2px solid rgba(255,255,255,.08); filter:saturate(1.05) contrast(1.02); box-shadow:0 10px 40px rgba(0,0,0,.35) }
.hero h1{font-size:36px;margin:0 0 6px}.hero h1 .hi{display:block;font-weight:300;color:var(--muted);font-size:16px;letter-spacing:.15em;text-transform:uppercase}
.hero h2{margin:0;color:var(--accent)} .summary{line-height:1.6;opacity:.9}
.contacts{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.contacts a{color:var(--fg);opacity:.9;text-decoration:none;border-bottom:1px dashed rgba(255,255,255,.2)}.contacts span{opacity:.35}

/* Stack */
h3{margin:0 0 18px;font-size:22px;letter-spacing:.02em}
.tech-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.tech{background:#101327;border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:16px;display:grid;place-items:center;gap:10px;transition:transform .2s, box-shadow .2s}
.tech:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 12px 50px rgba(124,92,255,.25)}
.tech-logo{height:48px;display:grid;place-items:center}.tech-logo img{height:44px;max-width:100%}
.tech-name{font-weight:600}.tech.fallback{background:linear-gradient(135deg,#1c203a,#121528)}.tech.fallback .tech-name{opacity:.85}
.note{opacity:.7;margin-top:12px}

/* Timeline */
.timeline{list-style:none;margin:0;padding:0;display:grid;gap:18px}
.tl-item{display:grid;grid-template-columns:16px 1fr;gap:14px}
.tl-dot{width:16px;height:16px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px rgba(124,92,255,.7);margin-top:7px}
.tl-content{background:#101327;border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:14px 16px}
.tl-header{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}.tl-period{color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.tl-bullets{margin:6px 0 0 18px}

/* Tools */
.toolstrip{ display:flex; flex-wrap:wrap; gap:10px; margin:12px 0 4px }
.tooltile{
  display:flex; align-items:center; gap:8px;
  background:#0e1430; border:1px solid rgba(255,255,255,.08);
  border-radius:14px; padding:8px 10px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.tooltile:hover{ transform: translateY(-3px) scale(1.02); box-shadow:0 10px 40px rgba(0,156,255,.18); border-color: rgba(0,156,255,.35) }
.tool-logo{ width:22px; height:22px; display:grid; place-items:center }
.tool-logo img{ width:22px; height:22px }
.tool-name{ font-weight:600; font-size:13px }
.tooltile.fallback{ background:linear-gradient(135deg, #171b32, #10162a) }
.tooltile .tip{ bottom:130% }

/* Footer */
.footer{opacity:.6;text-align:center;margin:40px 0 60px}

/* Reveal */
.reveal{opacity:0;transform:translateY(28px) scale(.98);transition:opacity .7s, transform .7s}
.reveal.visible{opacity:1;transform:none}

/* Tooltip */
[data-tooltip]{position:relative}
.tip{position:absolute;left:50%;bottom:110%;transform:translateX(-50%) translateY(8px);background:#0b1530;color:var(--fg);border:1px solid rgba(255,255,255,.08);padding:10px 12px;border-radius:12px;width:220px;opacity:0;pointer-events:none;box-shadow:0 12px 40px rgba(0,0,0,.35);transition:opacity .18s, transform .18s}
.tip::after{content:"";position:absolute;left:50%;top:100%;transform:translateX(-50%);border:8px solid transparent;border-top-color:#0b1530}
.tech:hover .tip, .tooltile:hover .tip{opacity:1;transform:translateX(-50%) translateY(0)}

/* Responsive */
@media(max-width:780px){
  .hero{grid-template-columns:1fr}
  .tech-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
/* Certificaciones como tarjetas y uso eficiente del espacio */
.cert-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(260px,1fr));
  gap:16px;
  align-content:start;
}
.cert-card{
  display:block;
  background:linear-gradient(135deg, #0f2145, #0b1934);
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;
  padding:16px;
  text-decoration:none;
  color:var(--fg);
  position:relative;
  overflow:hidden;
  transition: transform .2s, box-shadow .2s;
}
.cert-card:hover{ transform:translateY(-4px) scale(1.01); box-shadow:0 16px 60px rgba(0,156,255,.25) }
.cert-title{ font-weight:800; letter-spacing:.3px }
.cert-by{ color:var(--muted); margin-top:4px }
.cert-ribbon{
  position:absolute; top:12px; right:-36px; transform:rotate(35deg);
  background:#00d1ff; color:#001226; font-weight:800; padding:6px 60px; opacity:.9
}
.edu-logo img{ filter: brightness(1.1) contrast(1.05) }