:root{
  --bg:#0b1220;
  --panel:#101a33;
  --text:#e9eefc;
  --muted:#b9c3e6;
  --accent:#6ea8ff;
  --border: rgba(255,255,255,.12);
  --max: 1100px;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1000px 600px at 20% -10%, rgba(110,168,255,.25), transparent 60%),
              radial-gradient(800px 500px at 80% 0%, rgba(160,110,255,.18), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a{ color:inherit; text-decoration:none; }
h1,h2,h3{ line-height:1.15; margin:0 0 .5rem; }
p{ margin:.5rem 0 0; color: var(--muted); }

.site-header{
  position: sticky; top:0; z-index:10;
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 18px;
  background: rgba(11,18,32,.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo{ font-weight:700; letter-spacing:.4px; }

.nav{ display:flex; gap: 14px; align-items:center; }
.nav a{ padding: 8px 10px; border-radius:10px; }
.nav a.active, .nav a:hover{ background: rgba(255,255,255,.08); }

.nav-toggle{
  display:none;
  border:1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 12px;
  padding: 8px 10px;
  cursor:pointer;
}

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}

.hero{
  padding: 72px 18px 42px;
}
.hero__content{
  max-width: var(--max);
  margin: 0 auto;
  background: linear-gradient(180deg, rgba(16,26,51,.9), rgba(16,26,51,.55));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px 22px;
}
.hero h1{ font-size: clamp(28px, 3.2vw, 44px); }
.hero__cta{ display:flex; gap: 12px; margin-top: 18px; flex-wrap:wrap; }

.btn{
  display:inline-block;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--accent);
  color: #071022;
  font-weight: 650;
}
.btn--ghost{
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.section{
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 18px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 12px;
}

.card{
  background: rgba(16,26,51,.6);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}

.footer{
  max-width: var(--max);
  margin: 16px auto 30px;
  padding: 0 18px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* Responsive */
@media (max-width: 820px){
  .grid{ grid-template-columns: 1fr; }
  .nav-toggle{ display:inline-block; }
  .nav{
    position: absolute;
    right: 18px;
    top: 56px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(11,18,32,.9);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 10px;
    display:none;
    min-width: 200px;
  }
  .nav.open{ display:flex; }
}

/* ===== Auth button (arriba derecha) ===== */
.nav-auth{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
  font: inherit;
}
.nav-auth:hover{ background: rgba(255,255,255,.10); }

.nav-auth.is-primary{
  background: var(--accent);
  color: #071022;
  border-color: transparent;
  font-weight: 650;
}

/* ===== Modal ===== */
.modal{
  position: fixed;
  inset: 0;
  display: none;
  z-index: 50;
}
.modal.open{ display: block; }

.modal__backdrop{
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.55);
}

.modal__panel{
  position: relative;
  width: min(92vw, 420px);
  margin: 10vh auto 0;
  background: rgba(16,26,51,.92);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  backdrop-filter: blur(10px);
}

.modal__header{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.icon-btn{
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 12px;
  padding: 6px 10px;
  cursor: pointer;
}

.modal__form{ display:flex; flex-direction:column; gap: 10px; }

.field span{ display:block; font-size: .9rem; color: var(--muted); margin-bottom: 6px; }

.field input{
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
}

.modal__actions{
  display:flex;
  gap: 10px;
  margin-top: 4px;
}

.hint{ font-size: .85rem; color: var(--muted); margin: 4px 0 0; }