/* ===== Variables y reset ===== */
:root {
  --bg: #0b0f14;
  --bg-2: #121821;
  --text: #e6edf3;
  --muted: #a9b4c0;
  --primary: #4cc2ff;
  --accent: #7cf29d;
  --danger: #ff6b6b;
  --card: #16202c;
  --border: #243244;
  --shadow: 0 6px 20px rgba(76,194,255,0.15);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ===== Layout semántico ===== */
header, main, footer { padding: 1rem; }
header {
  position: sticky; top: 0;
  backdrop-filter: saturate(1.2) blur(6px);
  background: rgba(18, 24, 33, 0.6);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
/* ===== Footer ===== */
.footer {
  background: var(--bg-2);
  padding: 2rem 1rem;
  border-top: 1px solid var(--border);
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand h3 {
  margin: 0;
  color: var(--primary);
}
.footer-brand p {
  color: var(--muted);
}

.footer-links h4,
.footer-download h4 {
  margin-bottom: 0.5rem;
  color: var(--accent);
}
.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 0.5rem;
}
.footer-links a {
  color: var(--text);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--primary);
}

.footer-download p {
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

/* ===== Navegación ===== */
nav {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.nav-brand { font-weight: 700; letter-spacing: 0.4px; }
.nav-menu {
  list-style: none; display: flex; gap: 0.75rem; margin: 0; padding: 0;
}
.nav-menu a {
  color: var(--text); text-decoration: none;
  padding: 0.5rem 0.75rem; border-radius: 8px; border: 1px solid transparent;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.nav-menu a:hover { border-color: var(--border); background: #0f1620; }
.nav-menu a.active { border-color: var(--primary); background: #0f1620; color: var(--primary); }

/* Hamburguesa */
.menu-toggle {
  display: none; cursor: pointer; font-size: 1.5rem; color: var(--text);
  background: none; border: none; line-height: 1;
}

/* Responsive header */
@media (max-width: 768px) {
  nav { flex-wrap: wrap; }
  .menu-toggle { display: block; }
  .nav-menu {
    flex-direction: column; width: 100%; display: none;
    background: var(--bg-2); border-top: 1px solid var(--border); padding: 1rem 0;
  }
  .nav-menu.show { display: flex; }
  .nav-menu a { padding: 0.75rem 1rem; width: 100%; }
}

/* ===== Hero parallax ===== */
.hero {
  position: relative;
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: url("https://images.unsplash.com/photo-1518770660439-4636190af475?q=80&w=1920&auto=format&fit=crop")
              center/cover fixed no-repeat;
  filter: brightness(0.45) saturate(1.1);
  z-index: -2;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(11,15,20,0.1), rgba(11,15,20,0.85) 70%, var(--bg));
  z-index: -1;
}
.hero h1 { font-size: clamp(2rem, 4vw, 3.5rem); margin: 0 1rem; letter-spacing: 0.5px; }
.hero p  { margin: 0.75rem 1rem 1.25rem; color: var(--muted); max-width: 60ch; }
.hero .cta { display: inline-flex; gap: 0.75rem; }

/* ===== Botones ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1rem; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card);
  color: var(--text); text-decoration: none; font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--primary); box-shadow: var(--shadow); }
.btn.primary { background: linear-gradient(180deg, #1b2a3a, #16202c); border-color: var(--primary); }
.btn.accent  { border-color: var(--accent); }
.btn.support {
  background-color: #ff5722; /* naranja corporativo */
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.btn.support:hover {
  background-color: #e64a19; /* tono más oscuro al pasar el mouse */
}

/* ===== Contenido ===== */
.section { max-width: 1100px; margin: 2rem auto; padding: 0 1rem; }
.grid { display: grid; gap: 1rem; }
.grid.cards { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--primary); transform: translateY(-1px); }
.card h3 { margin: 0 0 0.5rem; }
.card p  { color: var(--muted); }

/* ===== Contacto ===== */
form.card {
  display: flex; flex-direction: column; gap: 1rem;
  max-width: 600px; margin: 1.5rem auto;
}
form.card label { display: flex; flex-direction: column; font-weight: 600; color: var(--text); }
form.card input, form.card textarea {
  margin-top: 0.4rem; padding: 0.6rem 0.8rem;
  border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-2); color: var(--text); font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
form.card input:focus, form.card textarea:focus {
  border-color: var(--primary); outline: none;
  box-shadow: 0 0 0 2px rgba(76,194,255,0.25);
}
form.card button {
  width: fit-content; padding: 0.7rem 1.2rem;
  border-radius: 10px; border: 1px solid var(--primary);
  background: linear-gradient(180deg, #1b2a3a, #16202c);
  color: var(--primary); font-weight: 600; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
form.card button:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
#contact-status { margin-top: 1rem; text-align: center; font-style: italic; }

/* ===== Utilidades y accesibilidad ===== */
.muted { color: var(--muted); }
.center { text-align: center; }
.kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: #0f1620; border: 1px solid var(--border);
  border-radius: 6px; padding: 0.1rem 0.35rem;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}




.hero-content {
  color: var(--text);
  text-align: center;
  max-width: 800px;
}
.hero-subtitle {
  font-size: 1.25rem;
  margin: 1rem 0;
  color: var(--muted);
}

.highlight {
  background: linear-gradient(135deg, var(--bg-2), var(--card));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  margin-top: 2rem;
}
.highlight h2 {
  margin-bottom: 0.5rem;
  color: var(--primary);
}
.highlight p {
  margin-bottom: 1rem;
  color: var(--muted);
}
.section h2.center {
  margin-bottom: 1.5rem;
  font-size: 2rem;
  color: var(--primary);
}

.grid.cards .card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}
.grid.cards .card p {
  font-size: 0.95rem;
  color: var(--muted);
}









.acerca h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

.acerca p {
  margin-bottom: 1rem;
}

.acerca .card ul {
  padding-left: 1.2rem;
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.metodologia h2 {
  margin-top: 2rem;
  color: var(--accent);
}
.metodologia .card h3 {
  color: var(--primary);
}







.contacto .contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.contact-info h3 {
  margin: 0.5rem 0;
  color: var(--accent);
}
.contact-info p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.form-group {
  flex: 1;
  position: relative;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
}
.form-group label {
  position: absolute;
  top: -0.8rem;
  left: 0.75rem;
  background: var(--bg);
  padding: 0 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.contact-form button {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}