/* ============================================================
   Estrategias didácticas | ideaprende.com
   Hoja de estilos compartida
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Roboto', sans-serif;
  background: #f3f5f8;
  color: #263238;
}

/* ---------- Encabezado ---------- */
.top-bar {
  background: #e3e8f0;
  padding: 22px 16px;
  text-align: center;
  position: relative;
}

.top-bar h1 {
  font-size: clamp(20px, 4vw, 30px);
  font-weight: 700;
  color: #1a3a6b;
  letter-spacing: 0.5px;
}

.top-bar .breadcrumb {
  font-size: 13px;
  color: #607d8b;
  margin-top: 4px;
}

.back-link {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: #1a3a6b;
  text-decoration: none;
  font-weight: 500;
}
.back-link:hover { text-decoration: underline; }

/* ---------- Contenedor de bloques ---------- */
.blocks-wrap {
  max-width: 1300px;
  margin: 22px auto;
  padding: 0 16px 40px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.block {
  border-radius: 12px;
  transition: flex-grow 0.35s ease;
  overflow: hidden;
}

/* ---------- Bloque 1 ---------- */
.block-uno {
  background: #2d5299;
  color: #ffffff;
  flex: 1;
  min-height: 110px;
}

.block-uno.expanded { flex: 3.2; }

.block-uno .b1-header {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.block-uno .b1-title {
  font-size: 17px;
  font-weight: 500;
}

.block-uno .b1-sub {
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
  font-weight: 300;
}

.b1-toggle-icon {
  font-size: 20px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 12px;
}
.block-uno.expanded .b1-toggle-icon { transform: rotate(180deg); }

.b1-content {
  max-height: 0;
  overflow-y: auto;
  transition: max-height 0.4s ease;
  padding: 0 24px;
  background: #f7f9fc;
  color: #263238;
}

.block-uno.expanded .b1-content {
  max-height: 64vh;
  padding: 8px 24px 26px;
}

.b1-content h3 {
  color: #1a3a6b;
  font-size: 16px;
  font-weight: 500;
  margin: 18px 0 8px;
}
.b1-content h3:first-child { margin-top: 14px; }

.b1-content p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 10px;
  color: #37474f;
}

.b1-content ul, .b1-content ol {
  margin: 8px 0 14px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #37474f;
}

.b1-content li { margin-bottom: 4px; }

.refs {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid #cfd8e3;
}

.refs summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: #1a3a6b;
}

.refs ul {
  margin-top: 10px;
}

.refs li {
  font-size: 12px;
  color: #607d8b;
  margin-bottom: 8px;
  line-height: 1.5;
}

/* ---------- Bloque 2 ---------- */
.block-dos {
  background: #1a3a6b;
  color: #ffffff;
  flex: 1.4;
  min-height: 420px;
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
}

.block-uno.expanded ~ .block-dos { flex: 0.55; }

.b2-title {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.35;
  margin-bottom: 18px;
}

.b2-field { margin-bottom: 14px; }

.b2-field label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.b2-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.12);
  color: #ffffff;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  cursor: pointer;
  appearance: none;
}

.b2-select:disabled { opacity: 0.45; cursor: not-allowed; }
.b2-select option { color: #1a3a6b; }

.b2-result {
  margin-top: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  flex: 1;
  display: none;
}

.b2-result.show { display: block; }

.b2-result h4 {
  font-size: 11px;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
  margin-top: 12px;
}
.b2-result h4:first-child { margin-top: 0; }
.b2-result p { color: #e8f0fe; }

.b2-placeholder {
  font-size: 12px;
  color: rgba(255,255,255,0.55);
  text-align: center;
  margin-top: auto;
  padding-top: 30px;
}

.b2-btn {
  margin-top: 16px;
  background: #ffffff;
  color: #1a3a6b;
  border: none;
  border-radius: 8px;
  padding: 11px;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: block;
  transition: opacity 0.15s;
}
.b2-btn:hover { opacity: 0.88; }

.b2-btn.disabled {
  background: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.55);
  cursor: not-allowed;
  pointer-events: none;
}

.badge {
  display: block;
  font-size: 10px;
  font-weight: 400;
  margin-top: 2px;
  opacity: 0.8;
}

/* ---------- Responsivo ---------- */
@media (max-width: 880px) {
  .blocks-wrap { flex-direction: column; }
  .block-uno, .block-dos, .block-uno.expanded ~ .block-dos {
    flex: none;
    width: 100%;
  }
  .block-uno.expanded .b1-content { max-height: 60vh; }
}

/* ---------- Footer ---------- */
footer {
  text-align: center;
  padding: 18px;
  font-size: 12px;
  color: #90a4ae;
}

/* ---------- Botón ideaprende.com ---------- */
.home-btn {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 500;
  color: #1a3a6b;
  background: #ffffff;
  border: 1px solid #c5d5e8;
  border-radius: 20px;
  padding: 5px 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, box-shadow 0.15s;
}
.home-btn:hover {
  background: #eef3fb;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}