/* EconometricsAcademy — identidad CdeA */
:root {
  --cdea-navy:       #14274e;
  --cdea-navy-dark:  #0d1a36;
  --cdea-navy-soft:  #1e3a6b;
  --cdea-gold:       #c9a14a;
  --cdea-gold-soft:  #d9b76a;
  --cdea-cream:      #fcfaf5;
  --cdea-paper:      #ffffff;
  --cdea-ink:        #1a1a1a;
  --cdea-muted:      #6a6a6a;
  --cdea-border:     #e6e2d8;
}

html, body {
  background: var(--cdea-cream);
  color: var(--cdea-ink);
  font-family: Georgia, "Iowan Old Style", "Palatino", serif;
  font-size: 17px;
  line-height: 1.65;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  color: var(--cdea-navy);
  letter-spacing: -0.01em;
}

h1 { font-size: 2.0rem; }
h2 { font-size: 1.5rem; margin-top: 2rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

a { color: var(--cdea-navy); text-decoration: underline; text-decoration-color: var(--cdea-gold); text-underline-offset: 3px; }
a:hover { color: var(--cdea-navy-soft); }

/* Navbar */
.navbar-cdea {
  background: var(--cdea-navy);
  border-bottom: 3px solid var(--cdea-gold);
}
.navbar-cdea .navbar-brand,
.navbar-cdea .nav-link {
  color: #fff !important;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.navbar-cdea .nav-link:hover { color: var(--cdea-gold-soft) !important; }
.navbar-cdea .navbar-brand img {
  height: 38px; width: 38px; border-radius: 50%;
  border: 2px solid var(--cdea-gold);
  margin-right: 10px;
}
.navbar-cdea .brand-text {
  font-weight: 700; letter-spacing: 0.02em;
}
.navbar-cdea .brand-text .gold { color: var(--cdea-gold); }

/* Footer */
footer.cdea-footer {
  background: var(--cdea-navy-dark);
  color: #cfd5e0;
  padding: 2rem 0;
  margin-top: 4rem;
  border-top: 3px solid var(--cdea-gold);
  font-size: 0.9rem;
}
footer.cdea-footer a { color: var(--cdea-gold-soft); }

/* Cards */
.cdea-card {
  background: var(--cdea-paper);
  border: 1px solid var(--cdea-border);
  border-left: 4px solid var(--cdea-gold);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition: box-shadow .15s ease;
}
.cdea-card:hover { box-shadow: 0 4px 16px rgba(20, 39, 78, 0.08); }
.cdea-card h3 { margin-top: 0; }
.cdea-card .muted { color: var(--cdea-muted); font-size: 0.9rem; }

/* Feedback boxes */
.cdea-feedback {
  border-radius: 4px; padding: 1rem 1.25rem; margin: 1rem 0;
  border-left: 4px solid;
}
.cdea-feedback.ok     { background: #f1f8f3; border-left-color: #2b8a3e; color: #0f3d17; }
.cdea-feedback.err    { background: #fdf3f3; border-left-color: #b02a2a; color: #5a1414; }
.cdea-feedback .label { font-weight: 700; font-family: "Helvetica Neue", Arial, sans-serif; }

/* Botones */
.btn-cdea {
  background: var(--cdea-navy);
  color: #fff !important;
  border: 1px solid var(--cdea-navy);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.55rem 1.4rem;
  border-radius: 3px;
}
.btn-cdea:hover { background: var(--cdea-navy-soft); border-color: var(--cdea-navy-soft); color: #fff !important; }
.btn-cdea-gold {
  background: var(--cdea-gold);
  color: var(--cdea-navy-dark) !important;
  border: 1px solid var(--cdea-gold);
  font-weight: 700;
  padding: 0.55rem 1.4rem;
  border-radius: 3px;
}
.btn-cdea-gold:hover { background: var(--cdea-gold-soft); border-color: var(--cdea-gold-soft); }

/* Editor de código del ejercicio */
.code-editor {
  width: 100%;
  font-family: "JetBrains Mono", "Menlo", "Consolas", monospace;
  font-size: 14px;
  padding: 1rem;
  border: 1px solid var(--cdea-border);
  border-radius: 4px;
  background: #1e1e2e;
  color: #d4d4d4;
  resize: vertical;
  min-height: 260px;
  line-height: 1.5;
}
.code-editor:focus { outline: 2px solid var(--cdea-gold); }

/* Contenido de teoría (HTML embebido) */
.cdea-theory {
  background: var(--cdea-paper);
  border: 1px solid var(--cdea-border);
  border-radius: 4px;
  padding: 2rem 2.5rem;
  margin-bottom: 2rem;
}
.cdea-theory img { max-width: 100%; height: auto; }
.cdea-theory pre, .cdea-theory code {
  font-family: "JetBrains Mono", "Menlo", "Consolas", monospace;
  font-size: 0.92em;
}
.cdea-theory pre {
  background: #1e1e2e; color: #d4d4d4;
  padding: 1rem; border-radius: 4px; overflow-x: auto;
}
.cdea-theory table { border-collapse: collapse; margin: 1rem 0; }
.cdea-theory th, .cdea-theory td { border: 1px solid var(--cdea-border); padding: 0.4rem 0.8rem; }

/* Progreso / badges */
.cdea-badge {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  padding: 0.15rem 0.6rem; border-radius: 999px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.cdea-badge.completed { background: #2b8a3e; color: #fff; }
.cdea-badge.in_progress { background: var(--cdea-gold); color: var(--cdea-navy-dark); }
.cdea-badge.not_started { background: #e0e0e0; color: #555; }

/* Formularios */
.form-control:focus { border-color: var(--cdea-gold); box-shadow: 0 0 0 0.2rem rgba(201,161,74,.2); }

/* Portada / hero */
.cdea-hero {
  background: linear-gradient(135deg, var(--cdea-navy) 0%, var(--cdea-navy-soft) 100%);
  color: #fff;
  padding: 3.5rem 2rem;
  border-radius: 6px;
  margin-bottom: 2rem;
  border-bottom: 4px solid var(--cdea-gold);
}
.cdea-hero h1 { color: #fff; margin-bottom: 1rem; }
.cdea-hero .lead { color: #e7ddc1; font-size: 1.15rem; }

/* =========================================================
   Bloque de código colapsable (oculto por defecto)
   ========================================================= */
.cdea-code-block {
  margin: 1rem 0;
  border: 1px solid var(--cdea-border);
  border-radius: 4px;
  background: var(--cdea-paper);
  overflow: hidden;
}
.cdea-code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  background: #f1efe8;
  border-bottom: 1px solid var(--cdea-border);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.82rem;
}
.cdea-code-block.open .cdea-code-toolbar {
  background: var(--cdea-navy-dark);
  color: #cfd5e0;
  border-bottom-color: #2a2a3a;
}
.cdea-toggle-btn {
  background: transparent;
  border: none;
  color: var(--cdea-navy);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  letter-spacing: 0.02em;
}
.cdea-code-block.open .cdea-toggle-btn { color: var(--cdea-gold); }
.cdea-toggle-btn:hover { text-decoration: underline; }
.cdea-toggle-btn .chev { display: inline-block; transition: transform .15s ease; margin-right: 4px; }
.cdea-code-block.open .cdea-toggle-btn .chev { transform: rotate(90deg); }
.cdea-code-block .cdea-copy-inline {
  background: transparent;
  color: #9aa3b0;
  border: 1px solid #3a3a4a;
  border-radius: 3px;
  padding: 2px 10px;
  font-size: 0.72rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  cursor: pointer;
  letter-spacing: 0.04em;
}
.cdea-code-block .cdea-copy-inline:hover {
  background: var(--cdea-gold);
  color: var(--cdea-navy-dark);
  border-color: var(--cdea-gold);
}
.cdea-code-block .cdea-copy-inline.copied {
  background: #2b8a3e; color: #fff; border-color: #2b8a3e;
}
/* Oculta cualquier hijo (pre, div.sourceCode, div.code-copy-outer-scaffold)
   que no sea la toolbar. Al añadir .open, se muestran. */
.cdea-code-block > *:not(.cdea-code-toolbar) { display: none !important; }
.cdea-code-block.open > *:not(.cdea-code-toolbar) { display: block !important; }
.cdea-code-block pre { margin: 0; border-radius: 0; }
.cdea-copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: rgba(255,255,255,.08);
  color: #d4d4d4;
  border: 1px solid #3a3a4a;
  border-radius: 3px;
  padding: 2px 10px;
  font-size: 0.72rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.04em;
  cursor: pointer;
  opacity: 0.6;
  transition: all .15s ease;
}
.cdea-theory pre:hover .cdea-copy-btn { opacity: 1; }
.cdea-copy-btn:hover {
  background: var(--cdea-gold);
  color: var(--cdea-navy-dark);
  border-color: var(--cdea-gold);
}
.cdea-copy-btn.copied {
  background: #2b8a3e; color: #fff; border-color: #2b8a3e; opacity: 1;
}

/* =========================================================
   Sidebar del módulo (TOC + ejercicios)
   ========================================================= */
.cdea-sidebar {
  top: 88px;
  background: var(--cdea-paper);
  border: 1px solid var(--cdea-border);
  border-radius: 4px;
  padding: 1rem 1.1rem;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.92rem;
}
.cdea-sidebar h4 {
  font-size: 0.78rem;
  color: var(--cdea-navy);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--cdea-gold);
}
.cdea-sidebar h4:not(:first-child) { margin-top: 1.1rem; }
.cdea-sidebar .toc-item {
  display: block;
  color: var(--cdea-ink);
  text-decoration: none;
  padding: 0.25rem 0;
  line-height: 1.35;
  border-left: 2px solid transparent;
  padding-left: 0.6rem;
  margin-left: -0.6rem;
}
.cdea-sidebar .toc-item:hover {
  color: var(--cdea-navy);
  border-left-color: var(--cdea-gold);
  background: rgba(201,161,74,.06);
}
.cdea-sidebar .toc-h3 { padding-left: 1.4rem; font-size: 0.86rem; color: var(--cdea-muted); }
.cdea-sidebar .toc-exercise {
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--cdea-ink);
  text-decoration: none;
  padding: 0.4rem 0.2rem;
  border-bottom: 1px dashed var(--cdea-border);
  line-height: 1.3;
}
.cdea-sidebar .toc-exercise:last-child { border-bottom: none; }
.cdea-sidebar .toc-exercise .dot {
  flex: 0 0 10px; width: 10px; height: 10px;
  border-radius: 50%;
  background: #dcdcdc; border: 1px solid #b5b5b5;
}
.cdea-sidebar .toc-exercise.solved .dot { background: #2b8a3e; border-color: #1f6b2d; }
.cdea-sidebar .toc-exercise:hover { color: var(--cdea-navy); }

/* =========================================================
   Tarjetas de capítulo (catálogo visual)
   ========================================================= */
.cdea-chapter-card {
  display: flex; flex-direction: column;
  background: var(--cdea-paper);
  border: 1px solid var(--cdea-border);
  border-radius: 6px;
  padding: 1.3rem 1.35rem 1rem;
  height: 100%;
  transition: transform .18s ease, box-shadow .18s ease;
  position: relative; overflow: hidden;
}
.cdea-chapter-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--cdea-gold);
}
.cdea-chapter-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(20,39,78,.10);
}
.cdea-chapter-card h3 {
  font-size: 1.05rem; margin: 0.2rem 0 0.6rem; color: var(--cdea-navy);
}
.cdea-chapter-card h3 a { text-decoration: none; color: inherit; }
.cdea-chapter-card h3 a:hover { color: var(--cdea-navy-soft); }
.cdea-chapter-card .summary {
  color: var(--cdea-muted); font-size: 0.92rem;
  margin-bottom: 0.8rem; flex-grow: 1;
}
.cdea-chapter-card .meta {
  font-size: 0.82rem; color: var(--cdea-muted); margin-bottom: 0.8rem;
}
.cdea-chapter-card .actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.cdea-chapter-card .actions .btn { font-size: 0.82rem; padding: 0.35rem 0.8rem; }

/* Semáforo */
.cdea-traffic {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.78rem; font-weight: 700;
  padding: 0.2rem 0.65rem; border-radius: 999px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.cdea-traffic .dot { width: 9px; height: 9px; border-radius: 50%; }
.cdea-traffic.none  { background: #f1eedf; color: var(--cdea-muted); }
.cdea-traffic.none  .dot { background: #c0b9a2; }
.cdea-traffic.red   { background: #fdf0f0; color: #a12020; }
.cdea-traffic.red   .dot { background: #d94c4c; }
.cdea-traffic.amber { background: #fdf6e3; color: #8a6b14; }
.cdea-traffic.amber .dot { background: #d9a441; }
.cdea-traffic.green { background: #eff8f1; color: #1f6b2d; }
.cdea-traffic.green .dot { background: #2b8a3e; }

/* Barra de progreso */
.cdea-progress {
  height: 6px; background: #eee; border-radius: 999px;
  overflow: hidden; margin-bottom: 0.8rem;
}
.cdea-progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--cdea-gold) 0%, var(--cdea-gold-soft) 100%);
  transition: width .3s ease;
}