:root {
  --gap-pc: 18px;
  --gap-mob: 12px;
  --circle-pc: 116px;
  --groups-gap: clamp(16px, 4vw, 22px);
  --circle-mob: clamp(104px, 30vw, 136px);
}

html,
body {
  margin: 0;
  padding: 0;
  visibility: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* agregado estética */
.header-container {
  text-align: center;
  padding: 20px 0 10px;
  margin-bottom: 34px; /* antes 14px */
}

.header-image {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  height: auto;
}

@media (max-width: 600px) {
  .header-image {
    width: 100%;
    max-width: 450px;
  }
}

/* Esto asegura que el splash no bloquee clics si algo falla */
#splashVerano {
    pointer-events: none;
    user-select: none;
}

/* Sombra suave a la imagen para que no "flote" plana */
#imgSplash {
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.2));
}

/* agregado estética */
.role-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 2vw, 12px);
  width: 100%;
  box-sizing: border-box;
  padding: 0 20px;
  margin-top: -10px;
  margin-bottom: 5px;
}

.role-selector span { /* agregado estética */
  font-weight: 600;
  color: #222;
}

.switch {
  position: relative;
  width: 48px;
  height: 26px;
  display: inline-block;
  user-select: none;
  touch-action: pan-x;
}

.slider {
  position: absolute;
  inset: 0;
  background-color: #ccc;
  border-radius: 26px;
  transition: background-color 0.3s;
}

.slider.checked {
  background-color: #28a745;
}

.knob {
  position: absolute;
  bottom: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.09);
  transition: left 0.28s cubic-bezier(0.45, 1.8, 0.58, 1), background 0.2s;
  z-index: 2;
  touch-action: none;
}

.slider.checked .knob {
  left: 25px;
}

.knob.dragging {
  transition: none;
  background: #eee;
}

.home-search {
  max-width: 980px;
  margin: 20px auto 10px;
  padding: 0 16px;
  display: block;
  box-sizing: border-box;
}

.home-search input {
  width: min(100%, 32ch);
  min-width: auto;
  font-size: 14px;
  padding: 6px 10px;
  border: 2px solid #007bff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  outline: none;
}

.home-search input::placeholder {
  font-size: 14px;
}

.home-search input:focus {
  box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.12);
}

.toolbar {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 18px;
}

.back-btn {
  display: none;
  background: #eee;
  border: 0;
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
  margin: 0;
}

.back-btn.show {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
}

.current-group {
  font-weight: 800;
  color: #222;
  display: none;
}

.current-group.show {
  display: inline-flex;
  align-items: center;
}

#badgesExplicacion {
  display: none;
}

.badges-explicacion {
  max-width: 980px;
  margin: 42px auto 12px;
  padding: 0 16px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  box-sizing: border-box;
}

.ludicos-notice {
  max-width: 700px;
  margin: 10px auto 18px;
  padding: 0 16px;
  text-align: center;
  color: #777;
  font-size: 0.85rem;
  line-height: 1.4;
  box-sizing: border-box;
}

.badges-explicacion .badge-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff !important;
  border: 2px solid #007bff !important;
  border-radius: 999px;
  color: #007bff !important;
  padding: 4px 10px;
  font-size: 0.9rem;
  max-width: 10.5em;
}

.badge-emoji {
  display: inline-block;
}

.badges-explicacion .badge-text {
  color: #007bff !important;
  white-space: normal;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.15;
}

.linktree-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--gap-pc);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
  box-sizing: border-box;
}

.link-item {
  padding: 20px;
  border-radius: 12px;
  border: 2px solid currentColor;
  transition: transform 0.2s ease, box-shadow 0.2s ease, height 0.25s ease;
  box-sizing: border-box;
  cursor: pointer;
  background-color: rgba(0, 0, 0, 0.03);
  width: 100%;
  height: 140px;
  min-height: 140px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

/* Tarjetas con submenú: al expandir, la altura pasa a ser automática
   para acomodar las opciones secundarias; al contraer, todas vuelven
   a la misma altura fija de arriba (140px), sin importar si tienen
   destacado o no. */
.link-item.expanded {
  height: auto;
  overflow: visible;
  justify-content: flex-start;
}

.link-item.collapsed .link-content.secondary {
  display: none !important;
}

/* Círculo +/- para expandir/contraer el submenú. Mismo color de fondo
   y línea que los botones secundarios (.secondary) — se fija inline
   por JS con el colorHex de cada tarjeta, esto son solo el resto de
   las propiedades. */
.link-item .toggle-expand {
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.16);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  user-select: none;
  z-index: 6;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.12);
  transition: transform 0.15s ease, background 0.15s ease;
}

.link-item .toggle-expand:hover {
  transform: scale(1.08);
}

/* Badge de destacado como overlay fijo: no participa del flujo, por
   lo que nunca cambia la altura de la tarjeta (ni contraída ni al
   aparecer/desaparecer el destacado). */
.link-item .badge-overlay {
  position: absolute;
  bottom: 8px;
  left: 8px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  z-index: 6;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
}

.link-item .badge-overlay .emoji-new,
.link-item .badge-overlay .emoji-star,
.link-item .badge-overlay .emoji-update {
  margin: 0;
  display: block;
  line-height: 1;
  /* El sombreado 1px/1px de .emoji-star agrega peso visual abajo-a-la-derecha
     y hace que el glifo se vea corrido hacia arriba-izquierda dentro del
     círculo blanco — acá no hace falta (fondo blanco fijo), lo anulamos para
     que la estrella quede realmente centrada. */
  text-shadow: none;
}

/* Deja espacio abajo para no superponer el título/opciones con los
   círculos overlay (toggle y/o badge), tanto contraída como expandida
   (ahí el último botón secundario es el que quedaría debajo del +/-). */
.link-item:has(.toggle-expand, .badge-overlay) {
  padding-bottom: 40px;
}

.link-item:hover {
  transform: scale(1.015);
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.16), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.link-item:active {
  transform: scale(0.985);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.14);
}

/* agregado estética: transiciones uniformes */
.group-card,
.group-card:hover,
.link-item,
.link-content.secondary {
  transition: all 0.25s ease;
}

/* --- hasta aquí se corrigió una llave extra --- */

@media (max-width: 900px) {
  .linktree-container {
    gap: var(--gap-mob);
  }

  .link-item {
    flex: 0 0 calc((100% - var(--gap-mob)) / 2);
    min-width: 0;
  }
}

@media (max-width: 420px) {
  .linktree-container {
    padding: 0 12px;
  }
}

.link-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  margin-bottom: 12px;
  width: 100%;
}

.link-content span {
  font-weight: bold;
  font-size: 1.2em;
  color: #333;
  white-space: normal;
  overflow-wrap: break-word;
  text-align: left;
}

.texto-principal {
  width: 100%;
  display: block;
}

/* --------- secondary sub-buttons ---------- */
.link-content.secondary {
  display: inline-flex !important;
  width: auto !important;
  max-width: 92% !important;
  align-self: flex-start !important;
  padding: 6px 10px;
  margin: 6px 6px 6px 0;
  white-space: nowrap !important;
  box-sizing: border-box;
  background-color: rgba(0, 0, 0, 0.06);
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.16);
  color: inherit;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
  transition: background-color 0.12s, border-color 0.12s, transform 0.06s, box-shadow 0.12s;
  transform: translateZ(0);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.12);
  overflow: visible !important;
  justify-content: center;
  vertical-align: middle;
}

.link-content.secondary:hover,
.link-content.secondary:focus {
  background-color: rgba(0, 0, 0, 0.1);
  border-color: rgba(0, 0, 0, 0.28);
  outline: none;
  transform: translateY(-1px);
}

.link-content.secondary:focus {
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.08);
  border-color: rgba(0, 0, 0, 0.28);
}

.link-content.secondary span {
  display: inline-block !important;
  font-weight: 400 !important;
  font-size: 0.92rem !important;
  line-height: 1.1 !important;
  color: inherit !important;
  white-space: nowrap !important;
}

@media (max-width: 600px) {
  .link-content.secondary {
    white-space: normal !important;
    display: inline-flex !important;
    max-width: 42ch !important;
    width: auto !important;
    align-self: flex-start !important;
    word-break: break-word !important;
    hyphens: auto !important;
  }

  .link-content.secondary span {
    white-space: normal !important;
    display: block !important;
    word-break: break-word !important;
  }
}

.badge-destacado {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  background: none;
  border: none;
  min-height: 2.5em;
}

.badge-destacado .emoji-new,
.badge-destacado .emoji-star,
.badge-destacado .emoji-juego,
.badge-destacado .emoji-update {
  margin: 0;
  display: inline-block;
}

.emoji-new {
  animation: fireBlink 0.7s infinite alternate;
  filter: drop-shadow(0 0 2px #ff6a00);
}

.emoji-star {
  filter: drop-shadow(0 0 2px #ffd700);
  text-shadow: 1px 1px 2px #333, 0 0 3px #fffbe7;
}

.emoji-juego {
  min-height: 1.7em;
  display: flex;
  align-items: center;
  justify-content: center;
}

.emoji-update {
  filter: drop-shadow(0 0 2px rgba(0, 191, 255, 0.9));
}

@keyframes fireBlink {
  0% {
    transform: scale(1) rotate(-8deg);
    opacity: 1;
  }
  40% {
    transform: scale(1.15) rotate(10deg);
    opacity: 0.95;
  }
  100% {
    transform: scale(1.33) rotate(-8deg);
    opacity: 0.7;
  }
}

.groups-title {
  font-weight: 400;
  text-align: center;
  color: #555;
  margin: 0 0 clamp(5px, 2.4vw, 10px);
  font-size: clamp(14px, 3.5vw, 20px);
}

/* agregado estética */
.groups-intro {
  margin-top: 6px;
  margin-bottom: 12px;
}

@media (max-width: 600px) {
  .groups-title {
    font-size: clamp(16px, 4.6vw, 24px);
  }
}

.groups-sub {
  text-align: center;
  color: #444; /* antes #666 */
  font-size: 1rem; /* leve aumento */
  margin-top: 30px; /* agregado estética: más aire superior */
  margin-bottom: 10px; /* agregado estética: más aire inferior */
}

.groups-wrapper {
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 16px 0;
  display: grid;
  grid-template-columns: repeat(4, var(--circle-pc));
  justify-content: center;
  justify-items: center;
  gap: var(--groups-gap);
  box-sizing: border-box;
}

/* agregado estética: sombra y hover sutil */
.group-card {
  width: var(--circle-pc);
  max-width: var(--circle-pc);
  aspect-ratio: 1/1;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  text-align: center;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18),
              inset 0 1px 2px rgba(255, 255, 255, 0.25);
  transition: transform 0.25s ease, box-shadow 0.3s ease;
  padding: 12px;
  backdrop-filter: saturate(1.1);
  box-sizing: border-box;
}

.group-card:hover {
  transform: scale(1.04) translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
}

/* agregado estética: legibilidad texto */
.group-card span {
  line-height: 1.25;
  font-size: clamp(14px, 2.8vw, 18px);
  text-shadow: 0.5px 0.5px 1.5px rgba(0,0,0,0.35);
}

/* agregado estética: animación de entrada */
@keyframes aparecerSuave {
  0% { opacity: 0; transform: scale(0.8); }
  60% { opacity: 1; transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

.groups-wrapper .group-card {
  animation: aparecerSuave 0.5s ease-out both;
}

.groups-wrapper .group-card:nth-child(2) { animation-delay: 0.05s; }
.groups-wrapper .group-card:nth-child(3) { animation-delay: 0.1s; }
.groups-wrapper .group-card:nth-child(4) { animation-delay: 0.15s; }

@media (max-width: 600px) {
  .groups-wrapper {
    grid-template-columns: repeat(2, var(--circle-mob));
    gap: clamp(10px, 3.2vw, 16px); /* reducido leve */
    padding-bottom: 10px; /* agregado estética */
  }

  .group-card span {
    font-size: clamp(14px, 4.4vw, 18px);
    line-height: 1.25;
  }
}

@media (min-width: 601px) {
  .group-card {
    filter: saturate(1.5) contrast(1.08);
  }
}

.g-cursada {
  background: radial-gradient(80% 80% at 30% 20%, #81c784, #388e3c);
}

.g-casos {
  background: radial-gradient(80% 80% at 30% 20%, #ffab91, #ff5000);
}

.g-ludicos {
  background: radial-gradient(80% 80% at 30% 20%, #64b5f6, #0056b3);
}

.g-extras {
  background: radial-gradient(80% 80% at 30% 20%, #ab47bc, #6a1b7a);
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

.pie {
  display: block;
}

@media (max-width: 600px) {
  html,
  body {
    min-height: 100dvh;
    overflow-x: hidden;
  }
}

#modalOverlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1000;
}

/* ===== Password Modal ===== */
.password-modal {
  position: fixed;
  top: 35%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  border-left: 8px solid red;
  padding: 20px;
  z-index: 1001;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  width: 300px;
  text-align: center;
  border-radius: 10px;
}

.password-modal .emoji {
  font-size: 2em;
  margin-bottom: 10px;
}

.password-modal input {
  width: 90%;
  padding: 8px;
  margin-bottom: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 1em;
}

.password-modal button {
  background-color: #28a745;
  color: white;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  font-size: 1em;
  line-height: 1.2;
}

#mensajeError {
  display: none;
  color: red;
  font-weight: bold;
  margin-top: 10px;
}

.password-modal input:focus,
.password-modal input:focus-visible {
  outline: none;
  box-shadow: none;
}

/* ===== Curso Modal ===== */
#cursoOverlay {
  display: none;
  position: fixed;
  z-index: 2002;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.55);
  overflow-y: auto;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  padding-bottom: 32px;
}

#cursoOverlay input {
  padding: 12px;
  width: 94%;
  font-size: 1.2em;
  border-radius: 7px;
  border: 1.5px solid #aaa;
  margin-bottom: 15px;
  text-align: center;
  outline: none;
  box-sizing: border-box;
  max-width: 400px;
}

.curso-modal {
  background: #fff;
  border-radius: 14px;
  padding: 28px 22px 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
  width: 100%;
  max-width: 400px;
  min-width: 220px;
  text-align: center;
  position: relative;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  border-left: 9px solid #2196f3;
  border-top: none;
  border-bottom: none;
  border-right: none;
}

@media (max-width: 450px) {
  .curso-modal {
    max-width: 300px;
    padding: 18px 6vw 14px;
  }
}

#cursoOverlay button {
  background: #28a745;
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: clamp(8px, 1.6vh, 12px) clamp(18px, 3.2vh, 28px);
  min-width: 110px;
  font-size: clamp(0.9em, 2.6vh, 1.05em);
  cursor: pointer;
  margin-bottom: 8px;
  font-weight: bold;
  letter-spacing: 1px;
  box-shadow: 0 2px 10px rgba(40, 167, 69, 0.07);
  transition: background 0.15s;
  width: auto;
  display: inline-block;
}

#cursoOverlay button:hover,
#cursoOverlay button:focus {
  background: #219638;
}

#profesorHome {
  margin-top: 20px;
  margin-bottom: 4px;
}

.curso-mensaje {
  display: none;
  background: #f8fbff;
  border: 1px solid #cfe3ff;
  border-radius: 10px;
  padding: 14px;
  margin-top: 8px;
}

.curso-mensaje-text {
  white-space: pre-wrap;
  font-size: 0.98em;
  color: #222;
  text-align: center;
  margin-bottom: clamp(12px, 2vh, 24px);
}

#cursoContinuarBtn {
  font-size: 0.95em;
  padding: 8px 18px;
  min-width: 110px;
  border-radius: 6px;
}

#cursoContinuarBtn:focus,
#cursoLinkBtn:focus {
  outline: none !important;
  box-shadow: none !important;
}

/* Layouts PC y móvil (sin cambios estructurales) */
@media (min-width: 901px) {
  .linktree-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--gap-pc);
    max-width: 1100px;
    margin: 0 auto;
    padding-left: 0;
    padding-right: 0;
    box-sizing: border-box;
  }

  .linktree-container .link-item {
    flex: 0 0 clamp(340px, 32%, 360px);
    max-width: clamp(340px, 32%, 360px);
    box-sizing: border-box;
  }

  .linktree-container {
    justify-content: center !important;
  }

  .linktree-container .link-item {
    min-width: 340px;
  }
}

@media (max-width: 900px) {
  .linktree-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--gap-mob);
    margin: 0 auto;
    box-sizing: border-box;
    padding-left: 5vw;
    padding-right: 5vw;
  }

  .linktree-container .link-item {
    flex: 0 0 calc((100% - var(--gap-mob)) / 2);
    max-width: calc((100% - var(--gap-mob)) / 2);
    box-sizing: border-box;
  }

  .linktree-container > .link-item:first-child:last-child {
    flex: 0 0 100% !important;
    max-width: 100% !important;
  }

  .linktree-container:has(> .link-item:first-child:nth-last-child(2)) {
    justify-content: space-between;
  }
}

@media (max-width: 600px) {
  .groups-intro {
    margin-top: 14px !important;
  }

  .toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 12px !important;
    margin-bottom: 12px !important;
    min-height: auto !important;
  }

  .back-btn.show {
    margin: 0 !important;
    padding-top: 6px;
    padding-bottom: 6px;
  }

  .current-group.show {
    display: inline-flex;
    align-items: center;
    line-height: 1.1;
  }

  :root {
    --circle-mob: clamp(124px, 36vw, 164px);
    --groups-gap: clamp(14px, 4.8vw, 22px);
  }

  .groups-wrapper {
    padding-top: 14px;
    padding-bottom: 8px;
    grid-gap: var(--groups-gap);
  }

  .pie {
    margin-top: 8px !important;
  }
}


#helpBtn {
  display: block !important;
  font-size: 12px;
  cursor: pointer;
  margin-left: 18px;
  line-height: 1;
}

#helpBtn:hover {
  transform: scale(1.15);
}

#helpOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 24px;           
  box-sizing: border-box;  
}

.help-modal {
  position: relative;
  background: #f3f3f3;
  border-radius: 14px;
  padding: 18px;
  border: 2px solid #e0e0e0;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  max-width: 100%;
}

.help-img {
  width: 350px;
  height: 310px;
  max-width: 100%;
  height: auto;
  display: block;
}

.help-close {
  position: absolute;
  top: 8px;
  right: 10px;
  cursor: pointer;
  font-size: 16px;
}