:root {
  --color-texto: #1a1a1a;
  --color-fondo: #f4f6f6;
  --color-superficie: #ffffff;
  --color-borde: #e2e2e6;
  --color-acento: #009fe3;
  --color-acento-texto: #ffffff;
  --color-error: #b3261e;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-texto: #f0f0f0;
    --color-fondo: #121212;
    --color-superficie: #1c1c1e;
    --color-borde: #333336;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-fondo);
  color: var(--color-texto);
  line-height: 1.5;
}

.logo-cabecera {
  display: block;
  margin: 0 auto 1.5rem;
  padding: 1rem 2rem;
  background: #ffffff;
  border-radius: 0.75rem;
  width: fit-content;
  max-width: 100%;
}
.logo-cabecera img { display: block; height: 110px; width: auto; max-width: 100%; }

.tarjeta {
  max-width: 420px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  text-align: center;
}

.foto-envoltorio {
  position: relative;
  width: 148px;
  margin: 0 auto 0.75rem;
}

.foto {
  display: block;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-borde);
}

.logo-insignia {
  position: absolute;
  bottom: -4px;
  right: -14px;
  display: block;
  height: 34px;
  width: auto;
  padding: 5px 10px;
  background: #ffffff;
  border-radius: 999px;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.tarjeta h1 { margin: 1rem 0 0.25rem; font-size: 1.5rem; }
.cargo { margin: 0 0 1.5rem; color: #6b6b6f; }

.contacto {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contacto a {
  display: block;
  padding: 0.75rem 1rem;
  background: var(--color-superficie);
  border: 1px solid var(--color-borde);
  border-radius: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.boton-guardar {
  display: block;
  padding: 0.9rem;
  background: var(--color-acento);
  color: var(--color-acento-texto);
  border-radius: 0.75rem;
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 2rem;
}

.qr-caja { margin-top: 1rem; }
.qr {
  width: 180px;
  height: 180px;
  padding: 0.75rem;
  background: #fff;
  border-radius: 0.75rem;
  border: 1px solid var(--color-borde);
}
.qr-nota { font-size: 0.85rem; color: #6b6b6f; }

/* Admin */
.admin {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.admin-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.admin-header h1 { margin: 0; flex: 1; }
.sesion { color: #6b6b6f; font-size: 0.9rem; margin: 0; }

.boton {
  display: inline-block;
  padding: 0.6rem 1rem;
  background: var(--color-acento);
  color: var(--color-acento-texto);
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
}

.admin-tabla {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-superficie);
  border: 1px solid var(--color-borde);
  border-radius: 0.75rem;
  overflow: hidden;
}
.admin-tabla th, .admin-tabla td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--color-borde);
  text-align: left;
  font-size: 0.9rem;
}
.admin-tabla .acciones { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.admin-tabla form { margin: 0; }

form label {
  display: block;
  margin-bottom: 1rem;
  font-weight: 600;
}
form input {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.6rem;
  border: 1px solid var(--color-borde);
  border-radius: 0.5rem;
  font: inherit;
  background: var(--color-superficie);
  color: inherit;
}
form small { display: block; font-weight: 400; color: #6b6b6f; margin-top: 0.2rem; }

button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 0.5rem;
  background: var(--color-acento);
  color: var(--color-acento-texto);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.enlace-volver { margin-left: 1rem; color: inherit; }
.error {
  background: #fdecea;
  color: var(--color-error);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
}