/* ===== Tipografía y base ===== */
html, body { height: 100%; }
body, .vt-body { 
  font-family: "Segoe UI", Roboto, system-ui, -apple-system, sans-serif; 
  line-height: 1.6; 
}

/* ===== Variables de tema ===== */
:root{
  --vt-bg:#ffffff;
  --vt-fg:#0f172a;
  --vt-muted:#475569;
  --vt-card:#f8fafc;
  --vt-border:#e2e8f0;
  --vt-accent:#ff7a00;        /* default: naranja */
  --vt-accent-contrast:#ffffff;
}
:root[data-theme="dark"]{
  --vt-bg:#0b0f1a;
  --vt-fg:#e5e7eb;
  --vt-muted:#94a3b8;
  --vt-card:#0f172a;
  --vt-border:#1f2937;
}
:root[data-accent="orange"]{ --vt-accent:#ff7a00; }
:root[data-accent="zapote"]{ --vt-accent:#8E4B10; }

/* ===== Layout ===== */
.vt-body{ background:var(--vt-bg); color:var(--vt-fg); }
.vt-nav{ background:var(--vt-bg)!important; border-bottom:1px solid var(--vt-border); }
.vt-main{ min-height:60vh; }
.vt-footer{ background:var(--vt-card); color:var(--vt-fg); border-top:1px solid var(--vt-border); }
.vt-accent{ color:var(--vt-accent); }

/* ===== Hero mejorado ===== */
.hero {
  background: linear-gradient(120deg,var(--vt-accent), #ff9933);
  color:#fff;
  padding:5rem 0;
  position:relative;
}
.hero .overlay {
  background: rgba(0,0,0,.45);
  padding:3rem;
  border-radius:1rem;
  max-width: 980px;
}

/* ===== Tarjetas y botones ===== */
.card.vt-soft {
  background: var(--vt-card);
  border: 1px solid var(--vt-border);
  border-radius: 1rem;
  transition: transform .2s, box-shadow .2s;
  color: var(--vt-fg);
}
.card.vt-soft .card-text{ color: var(--vt-muted); }
.card.vt-soft:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 28px rgba(0,0,0,.18);
}

.btn-info, .bg-info{
  background-color:var(--vt-accent)!important;
  border-color:var(--vt-accent)!important;
  color:var(--vt-accent-contrast)!important;
  font-weight:600;
  border-radius:.6rem;
}
.btn-info:hover{ filter:brightness(0.95); }
.nav-link.active, .nav-link:hover{ color:var(--vt-accent); }

/* ===== Utilidades ===== */
.section-title{ font-weight:700; letter-spacing:.2px; }
.lead-muted{ color:var(--vt-muted); }

/* ====== Dark theme readability fixes ====== */
:root[data-theme="dark"] .hero .overlay { background: rgba(0,0,0,.58); }

:root[data-theme="dark"] .navbar .nav-link { color: #e5e7eb; }
:root[data-theme="dark"] .navbar .nav-link.active,
:root[data-theme="dark"] .navbar .nav-link:hover { color: var(--vt-accent); }

/* Tarjetas: fondo, borde y textos con contraste */
:root[data-theme="dark"] .card.vt-soft {
  background: #111827;          /* un tono más claro que el body */
  border-color: #243041;
  color: #f1f5f9;
}
:root[data-theme="dark"] .card.vt-soft .card-title { color: #f8fafc; }
:root[data-theme="dark"] .card.vt-soft .card-text { color: #cbd5e1; }

/* Todo lo "muted" debe ser legible en dark */
:root[data-theme="dark"] .text-muted,
:root[data-theme="dark"] .lead-muted {
  color: #cbd5e1 !important;
  opacity: 0.95;
}

/* Footer contrast */
:root[data-theme="dark"] .vt-footer {
  background: #0f172a;
  border-top-color: #243041;
  color: #cbd5e1;
}

/* Botones outline en dark */
:root[data-theme="dark"] .btn-outline-light {
  color: #f8fafc;
  border-color: #f8fafc;
}
:root[data-theme="dark"] .btn-outline-light:hover {
  background: #f8fafc;
  color: #0b0f1a;
}

/* Formularios legibles en dark */
:root[data-theme="dark"] .form-control,
:root[data-theme="dark"] .form-select,
:root[data-theme="dark"] .form-control:focus,
:root[data-theme="dark"] .form-select:focus {
  background: #0b1320;
  color: #e5e7eb;
  border-color: #243041;
}
:root[data-theme="dark"] label { color: #e5e7eb; }

/* Títulos */
h1, h2, h3 { color: var(--vt-fg); }