/* ==========================================================================
   Programación Avanzada 2026 — Estilos de la Portada
   ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--pm-bg);
  color: var(--pm-ink);
  font-family: var(--pm-font-body);
  -webkit-font-smoothing: antialiased;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--pm-teal);
  outline-offset: 3px;
}

.pm-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --------------------------------------------------------------------------
   Hero Principal
   -------------------------------------------------------------------------- */
.pm-hero {
  background: radial-gradient(circle at 10% 15%, rgba(152, 141, 179, 0.25), transparent 45%),
              radial-gradient(circle at 92% 8%, rgba(0, 169, 157, 0.18), transparent 38%),
              linear-gradient(135deg, #ffffff 0%, #f7f5f9 60%, #eef8f7 100%);
  padding: 56px 20px 48px;
  border-bottom: 1px solid var(--pm-line);
}

.pm-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.pm-hero-content {
  max-width: 980px;
}

.pm-eyebrow {
  font-family: var(--pm-font-title);
  font-size: clamp(11px, 2.8vw, 13px);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--pm-violet-deep);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 12px;
}

.pm-hero-title {
  font-family: var(--pm-font-title);
  font-size: clamp(28px, 6.5vw, 52px); overflow-wrap: break-word;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--pm-ink);
  margin: 0 0 16px;
}

.pm-hero-lead {
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.6;
  color: #433c46;
  margin: 0 0 26px;
  max-width: 860px;
}

/* Pila Tecnológica */
.pm-tech-stack {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.pm-tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1px solid var(--pm-line);
  padding: 6px 14px;
  border-radius: 999px;
  font-family: var(--pm-font-title);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--pm-ink);
  box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}

.pm-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--pm-teal);
  display: inline-block;
}

/* Tarjeta Destacada Caso Integrador */
.pm-case-card {
  background: #ffffff;
  border: 2px solid var(--pm-violet);
  border-radius: 20px;
  padding: 24px 28px;
  box-shadow: 0 10px 30px rgba(117, 106, 150, 0.12);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  margin-top: 10px;
}

.pm-case-icon {
  font-size: 36px;
  width: 56px;
  height: 56px;
  background: #f1edf7;
  display: grid;
  place-items: center;
  border-radius: 16px;
}

.pm-case-badge {
  font-family: var(--pm-font-title);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--pm-teal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}

.pm-case-title {
  font-family: var(--pm-font-title);
  font-size: 21px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--pm-ink);
}

.pm-case-desc {
  font-size: 15px;
  line-height: 1.55;
  color: #554e58;
  margin: 0;
  max-width: 680px;
}

.pm-case-btn {
  background: var(--pm-violet-deep);
  color: #ffffff;
  text-decoration: none;
  font-family: var(--pm-font-title);
  font-size: 14.5px;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 12px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(117, 106, 150, 0.3);
  transition: all 0.15s ease;
}

.pm-case-btn:hover {
  background: #605580;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(117, 106, 150, 0.4);
}

/* --------------------------------------------------------------------------
   Mapa de Ruta / Arquitectura
   -------------------------------------------------------------------------- */
.pm-roadmap-section {
  padding: 38px 0 10px;
}

.pm-section-head {
  margin-bottom: 20px;
}

.pm-subhead {
  font-family: var(--pm-font-title);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--pm-teal);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pm-section-head h2 {
  font-size: 26px;
  margin: 4px 0 0;
}

.pm-roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}

.pm-roadmap-step {
  background: #ffffff;
  border: 1px solid var(--pm-line);
  border-radius: 16px;
  padding: 18px;
  text-decoration: none;
  color: var(--pm-ink);
  box-shadow: 0 3px 10px rgba(0,0,0,0.03);
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
}

.pm-roadmap-step:hover {
  border-color: var(--pm-violet);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}

.pm-step-num {
  font-family: var(--pm-font-title);
  font-size: 13px;
  font-weight: 800;
  color: var(--pm-violet-deep);
  background: #f1edf7;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  margin-bottom: 12px;
}

.pm-step-final .pm-step-num {
  background: #e6f6f4;
  color: var(--pm-teal);
}

.pm-roadmap-step h4 {
  font-family: var(--pm-font-title);
  font-size: 16.5px;
  font-weight: 700;
  margin: 0 0 6px;
}

.pm-roadmap-step p {
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--pm-text-muted);
  margin: 0 0 14px;
  flex-grow: 1;
}

.pm-step-tag {
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pm-violet-deep);
}

.pm-tag-highlight {
  color: var(--pm-teal);
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   Buscador Interactivo
   -------------------------------------------------------------------------- */
.pm-search-section {
  padding: 24px 0 14px;
}

.pm-search-card {
  background: #ffffff;
  border: 1px solid var(--pm-line);
  border-radius: 20px;
  padding: 20px 24px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.04);
}

.pm-search-bar {
  position: relative;
  display: flex;
  align-items: center;
}

.pm-search-icon {
  position: absolute;
  left: 16px;
  font-size: 18px;
  color: var(--pm-text-light);
  pointer-events: none;
}

.pm-search-input {
  width: 100%;
  font-family: var(--pm-font-body);
  font-size: 16px;
  padding: 14px 44px 14px 48px;
  border: 2px solid var(--pm-line);
  border-radius: 14px;
  background: #fbfafc;
  color: var(--pm-ink);
  transition: all 0.15s ease;
}

.pm-search-input:focus {
  border-color: var(--pm-teal);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(0, 169, 157, 0.15);
}

.pm-search-clear {
  position: absolute;
  right: 14px;
  background: none;
  border: none;
  font-size: 16px;
  color: var(--pm-text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
}

.pm-search-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.pm-filter-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--pm-text-light);
}

.pm-filter-chip {
  background: #f4f2f5;
  border: 1px solid var(--pm-line);
  border-radius: 999px;
  padding: 5px 12px;
  font-family: var(--pm-font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--pm-ink);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pm-filter-chip:hover {
  background: #ece8ef;
  border-color: var(--pm-violet);
}

.pm-filter-chip.is-active {
  background: var(--pm-violet-deep);
  border-color: var(--pm-violet-deep);
  color: #ffffff;
}

.pm-search-meta {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--pm-line-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pm-search-count {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--pm-text-muted);
}

/* Mensaje Sin Resultados */
.pm-search-empty {
  max-width: 600px;
  margin: 40px auto;
  text-align: center;
  padding: 0 20px;
}

.pm-empty-box {
  background: #ffffff;
  border: 2px dashed var(--pm-line);
  border-radius: 20px;
  padding: 36px 24px;
}

.pm-empty-icon {
  font-size: 44px;
  display: block;
  margin-bottom: 12px;
}

.pm-empty-box h3 {
  margin: 0 0 8px;
  font-size: 22px;
}

.pm-empty-box p {
  color: var(--pm-text-muted);
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.5;
}

.pm-btn-reset-search {
  background: var(--pm-teal);
  color: #ffffff;
  border: none;
  font-family: var(--pm-font-title);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.pm-btn-reset-search:hover {
  background: var(--pm-teal-hover);
}

/* --------------------------------------------------------------------------
   Secciones de Unidades y Tarjetas
   -------------------------------------------------------------------------- */
.pm-lessons-container {
  padding-top: 20px;
  padding-bottom: 60px;
}

.pm-unit {
  margin-bottom: 48px;
  scroll-margin-top: 90px;
}

.pm-unit-header {
  border-left: 6px solid var(--pm-violet);
  padding-left: 18px;
  margin-bottom: 22px;
}

.pm-unit-project .pm-unit-header {
  border-left-color: var(--pm-teal);
}

.pm-unit-badge-block {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.pm-unit-pill {
  font-family: var(--pm-font-title);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--pm-violet-deep);
  background: #f1edf7;
  padding: 3px 10px;
  border-radius: 6px;
}

.pm-pill-highlight {
  color: var(--pm-teal);
  background: #e6f6f4;
}

.pm-unit-competence {
  font-family: var(--pm-font-title);
  font-size: 12px;
  font-weight: 700;
  color: var(--pm-text-light);
}

.pm-unit-title {
  font-family: var(--pm-font-title);
  font-size: clamp(23px, 3vw, 29px);
  margin: 0 0 6px;
  color: var(--pm-ink);
}

.pm-unit-lead {
  color: var(--pm-text-muted);
  font-size: 16px;
  line-height: 1.5;
  margin: 0;
  max-width: 850px;
}

/* Grid de Tarjetas */
.pm-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

/* Tarjeta de Lección (.pm-card) */
.pm-card {
  background: #ffffff;
  border: 1px solid var(--pm-line);
  border-radius: 18px;
  padding: 22px;
  text-decoration: none;
  color: var(--pm-ink);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
}

.pm-card:hover {
  transform: translateY(-3px);
  border-color: var(--pm-violet);
  box-shadow: 0 10px 24px rgba(117, 106, 150, 0.14);
}

.pm-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.pm-card-num {
  font-family: var(--pm-font-title);
  font-size: 15px;
  font-weight: 800;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: #f1edf7;
  color: var(--pm-violet-deep);
  border-radius: 10px;
}

.pm-num-gold {
  background: #e6f6f4;
  color: var(--pm-teal);
  font-size: 14px;
}

.pm-badge-cet {
  font-family: var(--pm-font-title);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--pm-violet-deep);
  background: #f8f6fa;
  border: 1px solid var(--pm-line);
  padding: 3px 8px;
  border-radius: 999px;
}

.pm-card-title {
  font-family: var(--pm-font-title);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--pm-ink);
}

.pm-card-desc {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--pm-text-muted);
  margin: 0 0 16px;
  flex-grow: 1;
}

.pm-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.pm-tag {
  background: #f4f2f5;
  border: 1px solid var(--pm-line-light);
  color: var(--pm-ink);
  font-size: 12px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 6px;
}

.pm-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--pm-line-light);
}

.pm-card-link-text {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--pm-violet-deep);
}

.pm-card-arrow {
  color: var(--pm-teal);
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.15s ease;
}

.pm-card:hover .pm-card-arrow {
  transform: translateX(4px);
}

/* Tarjeta Destacada de Proyecto */
.pm-card-featured {
  border: 2px solid var(--pm-teal);
  background: linear-gradient(180deg, #ffffff 0%, #f6fcfa 100%);
}

/* --------------------------------------------------------------------------
   Responsividad de Portada
   -------------------------------------------------------------------------- */
@media (max-width: 860px) {
  .pm-case-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px;
  }

  .pm-case-btn {
    justify-content: center;
  }

  .pm-cards-grid {
    grid-template-columns: 1fr;
  }
}