/* ======================= VARIABLES ======================= */
:root {
  --primary: #e4e4e4;
  --dark-bg: #212529;
  --accent: #ff4d4d;
  --radius: 0.5rem;
  --red: #ff4d4d;
  --color-claro: #3498db;
  --color-oscuro: #212529;
  --green: #2ecc71;
  --yellow: #f1c40f;
  --blue: #1e90ff;
  --color-principal: #3498db; /* agregado para botones file-upload */
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--dark-bg);
  color: var(--primary);
  margin: 0;
  padding: 0;
  user-select: none;
  line-height: 1.6;
}

/* ================= ENCABEZADO ================= */
header.encabezado {
  position: relative;
  background-color: var(--color-oscuro);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  color: var(--primary);
  border-bottom: 2px solid var(--accent);
}

/* Ajustar contenedor de botones en el header */
header .auth-section {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: flex-end; /* alinearlos a la derecha */
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.auth-section {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.btn {
  background-color: #3498db;
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn:hover {
  background-color: var(--red);
}

.btn.iniciar-sesion {
  background-color: var(--blue);
}

.btn.iniciar-sesion:hover {
  background-color: #2980b9;
}

.btn.cerrar-sesion {
  background-color: var(--red);
}

.btn.cerrar-sesion:hover {
  background-color: #c0392b;
}
/* ================= MAIN ================= */
main.contenedor-principal {
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
  flex: 1 0 auto; /* ocupa el espacio restante */
}

/* ================= FORMULARIO ================= */
section.formulario {
  background-color: #1f1f1f;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

section.formulario h2 {
  margin-top: 0;
  color: var(--primary);
}

form#guia-form input,
form#guia-form textarea {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  background-color: #2c2c2c;
  color: var(--primary);
  border: 1px solid #444;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
}

form#guia-form hr {
  margin: 1.5rem 0;
  border: none;
  border-top: 1px solid #333;
}

#pasos-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ================= TARJETAS ================= */
.contenedor-apuntes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Se mantienen los estilos de las tarjetas tal como estaban */
.tarjeta {
  background-color: #2a2d32;
  border-radius: 12px;
  padding: 1.5rem;
  color: #fff;
  width: 100%;
  max-width: 350px;
  box-sizing: border-box;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tarjeta:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
}

.tarjeta-titulo {
  font-size: 1.3rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.tarjeta-descripcion {
  font-size: 0.95rem;
  color: #ccc;
  margin-bottom: 1rem;
}

.tarjeta-sistema {
  font-size: 0.85rem;
  color: #bbb;
}

.tarjeta:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
}

.tarjeta h3 {
  font-size: 1.2rem;
  color: var(--primary);
  margin: 0.5rem 0;
}

.tarjeta img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
}

.tarjeta p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: #ccc;
}

.tarjeta pre {
  background-color: #2b2b2b;
  color: #00ffcc;
  padding: 0.6rem;
  border-radius: var(--radius);
  font-family: "Courier New", monospace;
  font-size: 0.85rem;
  width: 100%;
  overflow-x: auto;
  text-align: left;
}

.tarjeta .acciones {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.boton-editar,
.boton-eliminar {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  color: white;
}

.boton-editar {
  background-color: var(--blue);
}

.boton-eliminar {
  background-color: var(--red);
}

.tarjeta .autor {
  font-size: 0.7rem;
  color: #999;
  margin-top: 0.5rem;
}
/* ================= FORMULARIO IMAGEN BOTÓN ================= */
.file-upload-wrapper {
  position: relative;
  width: 100%;
}

.file-upload-label {
  display: block;
  background-color: #333;
  color: var(--primary);
  padding: 0.75rem;
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--primary);
  margin-top: 0.5rem;
  transition: background-color 0.3s;
}

.file-upload-label:hover {
  background-color: #555;
}

input[type="file"] {
  display: none;
}

/* ================= FOOTER ================= */
footer.footer {
  text-align: center;
  padding: 1rem;
  background-color: #212529;
  font-size: 0.8rem;
  color: #aaa;
  border-top: 1px solid #333;
}

/* ================= TIMELINE PASOS ================= */
.timeline {
  position: relative;
  margin-top: 2rem;
  padding-left: 2rem;
  border-left: 3px solid var(--accent);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.paso {
  position: relative;
  background-color: #2c2c2c;
  padding: 1rem;
  border-radius: 0.75rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
  color: var(--primary);
  transition: transform 0.2s;
  border-left: 6px solid var(--color-claro);
}

.paso:hover {
  transform: scale(1.02);
}

.paso::before {
  content: "";
  position: absolute;
  left: -1.45rem;
  top: 1rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--accent);
  border-radius: 50%;
  border: 2px solid white;
}

.paso h4 {
  margin: 0 0 0.5rem;
  color: var(--color-claro);
  font-size: 1rem;
}

.paso p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.4;
  color: #ddd;
}

/* Colores dinámicos para hasta 30 pasos */
:root {
  --paso-color-1: #ff4d4d;
  --paso-color-2: #1e90ff;
  --paso-color-3: #2ecc71;
  --paso-color-4: #f1c40f;
  --paso-color-5: #9b59b6;
  --paso-color-6: #e67e22;
  --paso-color-7: #34495e;
  --paso-color-8: #e84393;
  --paso-color-9: #00cec9;
  --paso-color-10: #fdcb6e;
  --paso-color-11: #6c5ce7;
  --paso-color-12: #ff6b81;
  --paso-color-13: #00b894;
  --paso-color-14: #fab1a0;
  --paso-color-15: #81ecec;
  --paso-color-16: #a29bfe;
  --paso-color-17: #ffeaa7;
  --paso-color-18: #55efc4;
  --paso-color-19: #d63031;
  --paso-color-20: #6c3483;
  --paso-color-21: #1abc9c;
  --paso-color-22: #2c3e50;
  --paso-color-23: #ff9ff3;
  --paso-color-24: #f368e0;
  --paso-color-25: #48dbfb;
  --paso-color-26: #10ac84;
  --paso-color-27: #feca57;
  --paso-color-28: #5f27cd;
  --paso-color-29: #c8d6e5;
  --paso-color-30: #576574;
}

.paso[data-color] {
  border-left-color: var(--paso-color-1);
}

.paso[data-color="1"] {
  border-left-color: var(--paso-color-1);
}
.paso[data-color="2"] {
  border-left-color: var(--paso-color-2);
}
.paso[data-color="3"] {
  border-left-color: var(--paso-color-3);
}
.paso[data-color="4"] {
  border-left-color: var(--paso-color-4);
}
.paso[data-color="5"] {
  border-left-color: var(--paso-color-5);
}
/* ... hasta data-color="30" */
.paso[data-color="30"] {
  border-left-color: var(--paso-color-30);
}
.layout-flex {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}

#formulario-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  background-color: #1e1e2f;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

#guia-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

#guia-form input,
#guia-form textarea,
#guia-form select {
  width: 100%;
  padding: 0.8rem;
  border: none;
  border-radius: 8px;
  background-color: #2c2c3f;
  color: white;
  font-size: 1rem;
}

#guia-form input:focus,
#guia-form textarea:focus,
#guia-form select:focus {
  outline: 2px solid var(--primary);
}

#pasos-container .paso {
  border: 1px solid #444;
  padding: 1rem;
  border-radius: 8px;
  background-color: #2a2a3a;
}

.btn {
  padding: 0.6rem 1rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #0070c0;
}

#lista-guias {
  flex: 1 1 45%;
  min-width: 300px;
}

#detalle-guia {
  padding: 2rem;
}

.detalle-contenido {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.paso-detalle {
  border-left: 4px solid var(--primary);
  padding-left: 1rem;
  margin: 1rem 0;
}

.paso-detalle img {
  margin-top: 0.5rem;
  max-width: 100%;
  border-radius: 8px;
}

.volver-btn {
  margin-top: 2rem;
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
}

#agregar-paso-btn {
  margin-top: 20px;
}

.tarjeta-guia {
  background-color: #202030;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.tarjeta-guia:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
}

.tarjeta-cabecera {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.tarjeta-titulo {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--primary);
}

.tarjeta-sistema {
  background-color: #333;
  color: #fff;
  font-size: 0.85rem;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
}

.tarjeta-descripcion {
  color: #ccc;
  margin-bottom: 1rem;
}

.btn-ver-mas {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  margin-right: 1rem;
}

.btn-ver-mas:hover {
  background-color: var(--primary);
  color: #fff;
}
.detalle-contenido {
  padding: 2rem;
  background-color: #1a1a2e;
  border-radius: 12px;
  margin-top: 2rem;
  color: #fff;
}

.detalle-titulo {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.detalle-descripcion {
  color: #ccc;
  margin-bottom: 2rem;
}

/* Timeline general */
.timeline {
  position: relative;
  margin-left: 1rem;
  border-left: 3px solid var(--primary);
  padding-left: 2rem;
}

/* Cada ítem */
.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

/* Puntos de la línea */
.timeline-dot {
  position: absolute;
  left: -1.2rem;
  top: 0.2rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--primary);
  border-radius: 50%;
}

/* Contenido del paso */
.timeline-content {
  background-color: #2b2b40;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.timeline-content h4 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: #fff;
}

.timeline-content p {
  color: #ccc;
  margin-bottom: 0.5rem;
}

.timeline-img {
  max-width: 100%;
  border-radius: 6px;
  margin-top: 0.5rem;
}

.volver-btn {
  margin-top: 2rem;
  padding: 0.5rem 1rem;
  background-color: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: 6px;
  cursor: pointer;
}

.volver-btn:hover {
  background-color: var(--primary);
  color: #fff;
}

.tarjeta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 16px;
}

.tarjeta-contenido {
  text-align: center;
}

.oculto {
  display: none;
}

#guia-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

#guia-form input,
#guia-form textarea,
#guia-form select {
  width: 100%;
  padding: 0.7rem;
  border-radius: 6px;
  border: 1px solid #555;
  background-color: #2a2d32;
  color: #fff;
  font-size: 1rem;
  box-sizing: border-box;
}

#guia-form textarea {
  resize: vertical;
  min-height: 100px;
}

#guia-form input:focus,
#guia-form textarea:focus,
#guia-form select:focus {
  outline: none;
  border-color: #00b4d8;
  box-shadow: 0 0 5px #00b4d8;
}

#guia-form button {
  background: #00b4d8;
  color: white;
  padding: 0.7rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}

#guia-form button:hover {
  background: #0096c7;
}

#user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.file-upload-label {
  background-color: var(--color-principal);
  color: white;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  display: inline-block;
}

.file-upload-label input {
  display: none;
}
/* Ajustes de responsividad */
@media (max-width: 1024px) {
  main.contenedor-principal {
    padding: 1.5rem;
  }

  header.encabezado {
    flex-direction: column;
    gap: 1rem;
  }

  .auth-section {
    justify-content: center;
  }

  .layout-flex {
    flex-direction: column;
    gap: 1rem;
  }

  #lista-guias,
  #detalle-guia {
    flex: 1 1 100%;
  }
}

@media (max-width: 768px) {
  header h1 {
    font-size: 1.5rem;
  }

  /* Limitar tamaño de imágenes en vista previa de guías */
  .tarjeta img,
  .tarjeta-guia img {
    width: 100%; /* ocupar todo el ancho de la tarjeta */
    max-width: 300px; /* ancho máximo para que no se vea gigante */
    height: auto; /* mantener proporción */
    object-fit: cover; /* recortar centrado si es necesario */
    border-radius: 0.75rem;
    margin-bottom: 0.75rem;
  }

  #guia-form {
    max-width: 100%;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  header.encabezado {
    padding: 0.5rem 1rem;
  }

  .btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.9rem;
  }

  .tarjeta-titulo {
    font-size: 1.1rem;
  }

  .detalle-titulo {
    font-size: 1.5rem;
  }

  .timeline-content h4 {
    font-size: 1rem;
  }
}

/* Animaciones suaves */
button,
.btn,
.file-upload-label,
.tarjeta,
.tarjeta-guia {
  transition: all 0.3s ease;
}

button:active,
.btn:active,
.tarjeta:hover,
.tarjeta-guia:hover {
  transform: scale(0.98);
}

input:focus,
textarea:focus,
select:focus {
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

/* Scroll personalizado */
body::-webkit-scrollbar {
  width: 8px;
}

body::-webkit-scrollbar-track {
  background: #1a1a2e;
}

body::-webkit-scrollbar-thumb {
  background-color: var(--primary);
  border-radius: 4px;
  border: 2px solid #1a1a2e;
}

/* Estados deshabilitados */
button:disabled,
.btn:disabled {
  background-color: #555;
  cursor: not-allowed;
  opacity: 0.7;
}

/* Mensajes de error */
.error-msg {
  color: var(--red);
  font-size: 0.85rem;
  margin-top: -0.5rem;
  margin-bottom: 0.5rem;
}

/* Mensajes de éxito */
.success-msg {
  color: var(--green);
  font-size: 0.85rem;
  margin-top: -0.5rem;
  margin-bottom: 0.5rem;
}

/* Footer adicional */
footer.footer p {
  margin: 0;
}

/* Ajuste de formularios internos */
#formulario-container form label {
  display: block;
  margin-bottom: 0.3rem;
  color: #ccc;
  font-size: 0.9rem;
}

#formulario-container form input[type="text"],
#formulario-container form textarea,
#formulario-container form select {
  width: 100%;
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #555;
  background-color: #2a2d32;
  color: #fff;
  margin-bottom: 1rem;
  box-sizing: border-box;
}

#formulario-container form button {
  background-color: var(--blue);
  color: #fff;
  padding: 0.7rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

#formulario-container form button:hover {
  background-color: #2980b9;
}

/* Pantallas hasta 1024px */
@media (max-width: 1024px) {
  main.contenedor-principal {
    padding: 1.5rem;
  }

  header.encabezado {
    flex-direction: column;
    gap: 1rem;
  }

  .auth-section {
    justify-content: center;
  }

  .layout-flex {
    flex-direction: column;
    gap: 1rem;
  }

  #lista-guias,
  #detalle-guia {
    flex: 1 1 100%;
  }
}

/* Contenedor de tarjetas responsive */
.contenedor-apuntes,
.contenedor-guias {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  justify-items: center; /* centra las tarjetas si hay espacio extra */
  padding: 1rem;
}

/* Tarjetas responsivas */
.tarjeta,
.tarjeta-guia {
  width: 100%;
  max-width: 350px; /* evita que se estiren demasiado */
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Imagen dentro de la tarjeta */
.tarjeta img,
.tarjeta-guia img {
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: cover;
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
}

/* Ajustes específicos para móvil */
@media (max-width: 480px) {
  .contenedor-apuntes,
  .contenedor-guias {
    grid-template-columns: 1fr; /* una tarjeta por fila */
    gap: 1rem;
    padding: 0.5rem;
  }

  .tarjeta,
  .tarjeta-guia {
    max-width: 100%; /* ocupan todo el ancho disponible */
  }

  .tarjeta-titulo,
  .tarjeta-guia .tarjeta-titulo {
    font-size: 1rem; /* textos más pequeños para móviles */
  }

  .tarjeta p,
  .tarjeta-guia p {
    font-size: 0.85rem;
  }
}

/* ================= BOTÓN REGRESAR ================= */
.btn.regresar {
  position: absolute; /* relativo al header */
  top: 50%;
  left: 300px; /* posición inicial a la izquierda */
  transform: translateY(-50%);
  background-color: var(--red);
  color: white;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(255, 77, 77, 0.8);
  z-index: 1000;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.btn.regresar:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 15px rgba(255, 77, 77, 1);
}

/* ================= AJUSTES RESPONSIVE BOTÓN REGRESAR ================= */
@media (max-width: 768px) {
  .btn.regresar {
    left: 10px; /* separación en tablets */
    padding: 4px 8px; /* más pequeño */
    font-size: 0.85rem; /* tamaño de texto reducido */
    top: 45%; /* subir un poco más */
  }
}

@media (max-width: 480px) {
  .btn.regresar {
    left: 5px; /* más pegado al borde en móviles */
    padding: 3px 6px; /* aún más pequeño */
    font-size: 0.75rem; /* tamaño de texto reducido */
    top: 42%; /* su*