/* proyectos.css — Versión reescrita y completa
   Diseñado para trabajar con tu HTML y el JS que creaste.
   Incluye: variables, layout, formulario, inputs dinámicos, tarjetas, modal y responsive.
*/

/* ======================= VARIABLES ======================= */
:root {
  --bg: #0f1720; /* fondo oscuro */
  --card-bg: #111827;
  --muted: #9aa4b2;
  --text: #e6eef6;
  --accent: #38a3ff; /* color principal (azul) */
  --accent-2: #7c3aed; /* color secundario (morado) */
  --success: #2ecc71;
  --danger: #ff5252;
  --glass: rgba(255, 255, 255, 0.03);
  --radius: 12px;
  --small-radius: 8px;
  --shadow-1: 0 6px 18px rgba(2, 6, 23, 0.6);
  --shadow-2: 0 10px 30px rgba(2, 6, 23, 0.7);
  --transition: 220ms cubic-bezier(0.2, 0.9, 0.2, 1);
  --max-width: 1100px;
  --font: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial;
}

/* Light theme helper (optional use by JS) */
.light {
  --bg: #f6f8fb;
  --card-bg: #ffffff;
  --muted: #55606a;
  --text: #0f1720;
  --glass: rgba(15, 23, 32, 0.03);
}

/* ================= BODY / BASE ================= */
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, var(--bg), #071126 120%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.45;
  -webkit-tap-highlight-color: transparent;
  display: flex;
  flex-direction: column;
  min-height: 100vh; /* altura mínima = pantalla */
}

/* Centered container */
main.contenedor-principal {
  max-width: var(--max-width);
  margin: 2.2rem auto;
  padding: 1.25rem;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.5rem;
  align-items: start;
  flex: 1; /* ocupa el espacio disponible */
}

/* For narrow screens collapse to single column */
@media (max-width: 980px) {
  main.contenedor-principal {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
}

/* ================= HEADER ================= */
header.encabezado {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-radius: var(--radius);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.02),
    rgba(255, 255, 255, 0.01)
  );
  box-shadow: var(--shadow-1);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

header.encabezado h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: 0.2px;
  color: var(--text);
  font-weight: 600;
}

/* Auth section */
.auth-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.auth-section #user-nombre {
  font-size: 0.95rem;
  color: var(--muted);
  white-space: nowrap;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Avatar */
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.04);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.02),
    rgba(255, 255, 255, 0.01)
  );
  box-shadow: 0 2px 8px rgba(2, 6, 23, 0.6);
}

/* Buttons base */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    opacity var(--transition);
  box-shadow: 0 6px 18px rgba(56, 163, 255, 0.12);
}
.btn:active {
  transform: translateY(1px);
}
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* variant */
.btn.cerrar-sesion {
  background: var(--danger);
  box-shadow: 0 6px 18px rgba(255, 82, 82, 0.08);
}
.btn.iniciar-sesion {
  background: var(--accent);
}

/* hover */
.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

/* ================= LEFT COLUMN - LIST / TARJETAS ================= */
.contenedor-apuntes {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1rem;
  align-content: start;
}

/* When layout has two columns, left column should be the list.
   We'll adjust via order when screen is small using the main grid positions.
*/
@media (min-width: 981px) {
  .contenedor-apuntes {
    order: 1;
  }
}

/* Card (tarjeta) */
.tarjeta {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 0.9rem;
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: 0 6px 20px rgba(2, 6, 23, 0.6);
  transition: transform var(--transition), box-shadow var(--transition);
}
.tarjeta:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 50px rgba(2, 6, 23, 0.7);
}

/* Card image */
.tarjeta img {
  width: 140px;
  height: 95px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  background: #0a0f16;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

/* Card content */
.tarjeta h3 {
  margin: 0 0 0.3rem 0;
  font-size: 1.05rem;
  color: var(--text);
}
.tarjeta p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* actions inside card */
.acciones {
  margin-top: 0.6rem;
  display: flex;
  gap: 0.6rem;
}
.acciones .btn {
  padding: 0.45rem 0.7rem;
  font-size: 0.86rem;
}

/* Small responsive tweak to make cards stack */
@media (max-width: 680px) {
  .tarjeta {
    flex-direction: column;
    align-items: stretch;
  }
  .tarjeta img {
    width: 100%;
    height: 170px;
  }
}

/* ================= RIGHT COLUMN - FORMULARIO ================= */
section.formulario {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.01),
    rgba(255, 255, 255, 0.02)
  );
  border-radius: var(--radius);
  padding: 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: var(--shadow-1);
  width: 100%;
  max-height: calc(100vh - 160px);
  overflow: auto;
}

/* In single-column layout, form should appear above list (so order change) */
@media (max-width: 980px) {
  section.formulario {
    order: 0;
    margin-bottom: 1rem;
  }
  .contenedor-apuntes {
    order: 1;
  }
}

section.formulario h2 {
  margin: 0 0 0.8rem 0;
  font-size: 1.1rem;
  color: var(--text);
  text-align: center;
}

/* form-group */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
}
.form-group label {
  font-size: 0.93rem;
  color: var(--muted);
  font-weight: 600;
}

/* inputs and textarea */
input[type="text"],
input[type="file"],
textarea,
.imagen-descripcion {
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  background: var(--glass);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: box-shadow var(--transition), border-color var(--transition);
}
input[type="text"]::placeholder,
textarea::placeholder,
.imagen-descripcion::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

input[type="text"]:focus,
textarea:focus,
input[type="file"]:focus,
.imagen-descripcion:focus {
  box-shadow: 0 6px 18px rgba(56, 163, 255, 0.12);
  border-color: rgba(56, 163, 255, 0.85);
}

/* textarea sizing */
textarea {
  min-height: 120px;
  resize: vertical;
}

/* submit button full width */
#agregar-proyecto-btn {
  width: auto; /* ya no ocupa todo el ancho */
  padding: 0.6rem 1rem; /* ancho cómodo del botón */
  font-size: 0.9rem;
  display: inline-block;
  margin-left: auto; /* empuja el botón a la derecha */
  display: block; /* necesario para que margin-left:auto funcione */
  margin-top: 1rem;
}

/* small helpers for image section */
.imagen-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.imagen-wrapper {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.01);
  padding: 0.55rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}
.imagen-wrapper .imagen-input {
  flex-basis: 45%;
}
.imagen-wrapper .imagen-descripcion {
  flex: 1;
}

/* controls in image wrapper */
.imagen-controls {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  justify-content: flex-start;
}
.eliminar-imagen-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--muted);
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  cursor: pointer;
}
.eliminar-imagen-btn:hover {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

/* agregar-imagen button global */
.agregar-imagen-global,
.agregar-imagen-btn {
  align-self: flex-start;
  padding: 0.45rem 0.7rem;
  background: transparent;
  border: 1px dashed rgba(255, 255, 255, 0.06);
  color: var(--muted);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}
.agregar-imagen-global:hover,
.agregar-imagen-btn:hover {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

/* small preview inside form when editing existing images */
.imagen-preview img {
  display: block;
  max-width: 120px;
  border-radius: 8px;
  margin-bottom: 6px;
}
.imagen-preview small {
  color: var(--muted);
  display: block;
  margin-top: 4px;
}

/* ================= MODAL ================= */
.modal-oculto {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.6));
  z-index: 9999;
  padding: 1.25rem;
}
.modal-oculto.show {
  display: flex;
}

.modal-contenido {
  width: min(920px, 98%);
  max-height: calc(100vh - 100px);
  overflow: auto;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: var(--shadow-2);
  animation: modalIn 260ms cubic-bezier(0.2, 0.9, 0.2, 1);
}
@keyframes modalIn {
  from {
    transform: translateY(12px) scale(0.995);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}

/* modal header and close */
.cerrar-modal {
  float: right;
  background: transparent;
  border: none;
  font-size: 1.6rem;
  color: var(--muted);
  cursor: pointer;
  padding: 0.1rem 0.35rem;
  border-radius: 8px;
}
.cerrar-modal:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.modal-contenido h2 {
  margin: 0 0 0.6rem 0;
  color: var(--text);
}
#modal-descripcion {
  color: var(--muted);
  margin-bottom: 0.8rem;
}

/* modal images grid */
#modal-imagenes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}
.modal-imagen-block img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 10px;
}

/* modal actions */
.acciones-modal {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.6rem;
}
.boton-editar {
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  color: #fff;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
}
.boton-eliminar {
  background: var(--danger);
  color: #fff;
  padding: 0.5rem 0.7rem;
  border-radius: 10px;
}

/* ================= EMPTY STATE ================= */
.empty-state {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent);
  border: 1px dashed rgba(255, 255, 255, 0.03);
  color: var(--muted);
}

/* ================= SMALL SCREEN ADJUSTMENTS ================= */
@media (max-width: 560px) {
  header.encabezado {
    padding: 0.8rem 0.9rem;
    margin: 0.6rem auto;
  }
  .auth-section #user-nombre {
    display: none;
  }
  main.contenedor-principal {
    gap: 1rem;
    margin-top: 1rem;
  }
  .tarjeta img {
    height: 140px;
  }
  .modal-contenido {
    padding: 1rem;
  }
}

/* ================= Utilities ================= */
.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* ================= END ================= */
/* Estilo del footer */
footer.footer {
  text-align: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--muted);
  font-size: 0.9rem;
}
.boton-regresar {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  padding: 0.45rem 0.8rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);

  /* nueva línea para moverlo hacia abajo */
  margin-top: 0.5rem; /* ajusta el valor según necesites */
}
.btn.boton-regresar {
  margin-top: 2rem; /* ajusta este valor según necesites */
}
.boton-regresar:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent);
}
/* ================= RESPONSIVE COMPLETO ================= */

/* Para pantallas muy grandes >1400px */
@media (min-width: 1400px) {
  main.contenedor-principal {
    max-width: 1300px;
    margin: 2.5rem auto;
  }
}

/* Tablets / pantallas medianas <= 1024px */
@media (max-width: 1024px) {
  main.contenedor-principal {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  .tarjeta {
    flex-direction: column;
    align-items: stretch;
  }
  .tarjeta img {
    width: 100%;
    height: 160px;
  }
}

/* Smartphones grandes <= 680px */
@media (max-width: 680px) {
  .tarjeta img {
    height: 140px;
  }
  section.formulario {
    padding: 1rem;
  }
}

/* Smartphones medianos <= 560px */
@media (max-width: 560px) {
  header.encabezado {
    padding: 0.8rem 0.9rem;
    margin: 0.6rem auto;
  }
  .auth-section #user-nombre {
    display: none;
  }
  main.contenedor-principal {
    gap: 1rem;
    margin-top: 1rem;
  }
  .modal-contenido {
    padding: 1rem;
  }
  .tarjeta img {
    height: 140px;
  }
}

/* Smartphones pequeños <= 480px */
@media (max-width: 480px) {
  header.encabezado h1 {
    font-size: 1.2rem;
  }
  .auth-section {
    gap: 0.4rem;
  }
  .btn {
    padding: 0.4rem 0.7rem;
    font-size: 0.85rem;
  }
  section.formulario {
    padding: 0.8rem;
  }
  #agregar-proyecto-btn {
    width: auto; /* ya no ocupa todo el ancho */
    padding: 0.6rem 1rem; /* ancho cómodo del botón */
    font-size: 0.9rem;
    display: inline-block;
    margin-left: auto; /* empuja el botón a la derecha */
    display: block; /* necesario para que margin-left:auto funcione */
  }
  footer.footer {
    font-size: 0.8rem;
    padding: 0.8rem;
  }
  .modal-contenido {
    width: 95%;
    max-height: 90vh;
    padding: 0.8rem;
  }
  #modal-imagenes {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

/* Opcional: Navbar responsive que no cubra toda la pantalla */
@media (max-width: 1024px) {
  .navbar-collapse {
    max-height: 90vh;
    overflow-y: auto;
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1rem;
  }
}