:root{
  /* Paleta (≥3 colores) */
  --bg: #0b0f14;
  --card: #121722;
  --text: #e8eef7;
  --muted: #b8c2d6;
  --accent: #34d399;
  --accent-2:#22d3ee;
  --primary:#2563eb;
  --secondary:#10b981;

  --btn:#1f2937;
  --btn-hover:#2b3647;
  --radius:18px;

  /* Tipografía */
  --ff-body: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Helvetica, Arial, sans-serif;
  --ff-heading: 'Playfair Display', serif;

  /* Espaciado */
  --space-2:.5rem;
  --space-3:.75rem;
  --space-4:1rem;
  --space-6:1.5rem;
  --space-8:2rem;

  --container: 1000px;
  --elev-1: 0 20px 60px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px/1.55 var(--ff-body);
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%,rgba(52,211,153,.18),transparent 60%),
    radial-gradient(1200px 600px at 110% 110%,rgba(34,211,238,.18),transparent 60%),
    var(--bg);
}

/* ====== Layout base ====== */
.container{ width:min(var(--container), 100%); margin-inline:auto; padding-inline: var(--space-4); }

/* ====== Header + Nav ====== */
.site-header{
  display:flex; align-items:center; justify-content:space-between; gap:var(--space-6);
  width:min(var(--container), 100%); margin-inline:auto; padding: var(--space-6) var(--space-4);
}
.brand{ display:flex; align-items:center; gap:var(--space-4); }
.brand__logo{
  display:grid; place-items:center;
  width:48px; height:48px; border-radius:999px;
  background:linear-gradient(135deg, var(--primary), var(--secondary));
  color:#0b0f14; font-weight:800; text-decoration:none;
  box-shadow: var(--elev-1);
}
.brand__title{ font-family:var(--ff-heading); font-size:clamp(1.15rem,2.2vw,1.6rem); margin:0; }
.brand__subtitle{ margin:.1rem 0 0; color:var(--muted); font-size:.95rem; }

.site-nav .menu{
  display:flex; gap:.3rem; list-style:none; margin:0; padding:0;
}
.site-nav a{
  display:inline-block; padding:.55rem .85rem; border-radius:12px; color:var(--text); text-decoration:none;
  transition: transform .15s ease, background-color .2s ease, color .2s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible{
  background: color-mix(in oklab, var(--accent) 28%, transparent);
  transform: translateY(-2px);
  outline:none;
}
.site-nav a.is-current{
  background: color-mix(in oklab, var(--accent-2) 28%, transparent);
  color:white;
}

/* separadores sutiles entre items (selectores avanzados) */
.site-nav > .menu > li + li a::before{
  content:""; position:absolute; transform:translateX(-8px) translateY(2px);
  width:1px; height:14px; background: rgba(255,255,255,.14);
}
.site-nav > .menu > li a{ position:relative; }

/* ====== Tarjeta Linktree ====== */
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 40%) , var(--card);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);
  padding:28px;
  box-shadow: var(--elev-1);
  margin-block: var(--space-8);
}
.top{
  display:flex; gap:18px; align-items:center; justify-content:center; flex-wrap:wrap;
  text-align:center; margin-bottom:16px;
}
.avatar{
  width:94px; height:94px; border-radius:50%;
  border:3px solid rgba(255,255,255,.15);
  object-fit:cover; background:#0a0a0a;
}
.handle-title{ font-size:1.3rem; margin:.2rem 0 0; }
h1,h2,h3,h4{ font-family:var(--ff-heading); }
.handle{color:var(--muted); font-size:.95rem; margin-top:2px}
.bio{color:var(--muted); text-align:center; margin:12px 0 18px}
.links{display:grid; gap:12px; margin-top:10px}
.btn{
  display:flex; align-items:center; justify-content:center; gap:10px;
  width:100%; padding:14px 16px; text-decoration:none; color:var(--text);
  background:var(--btn); border:1px solid rgba(255,255,255,.08);
  border-radius:14px; transition:transform .08s ease, background .2s ease, border-color .2s ease;
  font-weight:600;
}
.btn:hover, .btn:focus-visible{background:var(--btn-hover); transform:translateY(-1px); border-color:rgba(255,255,255,.16); outline:none}
.btn .pill{
  font-size:.78rem; padding:4px 8px; border-radius:999px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2)); color:#0b0f14; font-weight:800;
}
.row{display:flex; gap:10px; flex-wrap:wrap}
.icon{width:18px; height:18px; display:inline-block; vertical-align:-3px}

/* ====== Secciones adicionales ====== */
.about, .contact{ padding-block: var(--space-8); }
.checklist{ padding-left: 1.1rem; }
.checklist li::marker{ content: "✔ "; color: var(--secondary); }

.form{
  display:grid; gap: var(--space-4);
  background: linear-gradient(180deg, rgba(255,255,255,.04), transparent 50%), var(--card);
  border:1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: var(--space-6);
}
.form__row{ display:grid; gap:.35rem; }
label{ font-weight:600; }
input, textarea{
  width:100%; padding:.7rem .9rem; border-radius:12px;
  background:#0B1322; color:var(--text);
  border:1px solid rgba(255,255,255,.12);
  outline:none; transition: border-color .2s ease, box-shadow .2s ease;
}
input:focus, textarea:focus{
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--secondary) 30%, transparent);
}
.btn--primary{ background: var(--primary); color:white; }
.btn--primary:hover, .btn--primary:focus-visible{ transform: translateY(-2px); }
.btn--ghost{ background: transparent; color: var(--text); border:1px solid rgba(255,255,255,.12); }
.btn--ghost:hover{ border-color: var(--accent-2); }

/* enlaces de correo con selector de atributo + :is() y :not() */
a[href^="mailto:"]:is(.btn, .table a){
  color: var(--secondary);
}
a[target="_blank"]:not([rel~="noopener"]){
  text-decoration: underline wavy #f59e0b;
}

/* ====== Footer ====== */
.site-footer{
  border-top:1px solid rgba(255,255,255,.12);
  background:#0a1018;
  margin-top: var(--space-8);
  padding: var(--space-8) var(--space-4);
}
.footer__cols{
  display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-6);
}
.copyright{
  color: var(--muted);
  text-align:center;
  margin-top: var(--space-6);
}

/* ====== Utilidades ====== */
.visually-hidden{
  position:absolute !important; inline-size:1px; block-size:1px; overflow:hidden;
  clip:rect(1px, 1px, 1px, 1px); white-space:nowrap;
}

/* ====== Responsive ====== */
@media (max-width: 900px){
  .footer__cols{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px){
  .site-header{ flex-direction: column; align-items:flex-start; }
  .site-nav .menu{ flex-wrap: wrap; }
  .footer__cols{ grid-template-columns: 1fr; }
  .btn{ width:100%; text-align:center; }
}

/* ====== Modo claro opcional ====== */
@media (prefers-color-scheme: light){
  :root{
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #0b0f14;
    --muted: #475569;
    --btn:#f1f5f9;
    --btn-hover:#e2e8f0;
  }
  .card, .form{ border-color: rgba(0,0,0,.08); }
}