/* ============================================================
   calculanotas.cl — main.css
   Mobile-first. Paleta Mineduc.
   ============================================================ */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --azul:        #0f69b4;
  --azul-mid:    #0d5a9a;
  --azul-light:  #E6F0FA;
  --rojo:        #DA291C;
  --rojo-light:  #FEE8E7;
  --rojo-border: #F9C4C1;
  --verde:       #065F46;
  --verde-light: #D1FAE5;
  --gris-50:     #F8F9FA;
  --gris-100:    #F1F3F5;
  --gris-200:    #E9ECEF;
  --gris-300:    #DEE2E6;
  --gris-500:    #ADB5BD;
  --gris-700:    #495057;
  --gris-900:    #212529;
  --blanco:      #FFFFFF;

  --font-main:   'Outfit', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:   'JetBrains Mono', 'Courier New', monospace;

  --radio-sm:    6px;
  --radio-md:    10px;
  --radio-lg:    14px;

  --sombra-sm:   0 1px 3px rgba(0,0,0,0.08);
  --sombra-md:   0 2px 8px rgba(0,0,0,0.10);

  --max-w:       860px;
  --pad-x:       16px;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 18px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Outfit', 'Helvetica Neue', Arial, sans-serif;
  color: #212529;
  background: #F8F9FA;
  line-height: 1.6;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select { font-family: inherit; }

/* ── Tipografía ─────────────────────────────────────────────── */
h1 { font-size: 1.6rem;  font-weight: 600; line-height: 1.25; }
h2 { font-size: 1.3rem;  font-weight: 600; line-height: 1.3;  }
h3 { font-size: 1.1rem;    font-weight: 600; line-height: 1.4;  }
p  { font-size: 1rem; line-height: 1.7; }

@media (min-width: 640px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.4rem; }
}

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ── HEADER ─────────────────────────────────────────────────── */
.site-header {
  background: #072a4f;
  border-bottom: 3px solid #DA291C;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  max-width: 860px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-icon {
  width: 32px;
  height: 32px;
  background: #DA291C;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-text {
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
}
.logo-text span { color: rgba(255,255,255,0.5); font-weight: 400; }

/* Nav desktop */
.main-nav { display: none; }
.main-nav a {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.75);
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.15s;
}
.main-nav a:hover,
.main-nav a.active {
  color: #ffffff;
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
}

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transition: all 0.2s;
}

/* Mobile nav drawer */
.mobile-nav {
  display: none;
  background: #0d5a9a;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  padding: 12px 16px;
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.8);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.15s;
}
.mobile-nav a:hover { background: rgba(255,255,255,0.05); color: white; }

@media (min-width: 640px) {
  .hamburger { display: none; }
  .main-nav  { display: flex; gap: 4px; }
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  background: #0f69b4;
  padding: 28px 16px 24px;
  text-align: center;
}
.hero h1 {
  color: #ffffff;
  margin-bottom: 8px;
}
.hero p {
  color: rgba(255,255,255,0.65);
  font-size: 0.9375rem;
  max-width: 480px;
  margin: 0 auto 24px;
}
.hero-anchors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  max-width: 420px;
  margin: 0 auto;
}
.anchor-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 10px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  color: #ffffff;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
}
.anchor-btn:hover {
  background: rgba(255,255,255,0.13);
  border-color: rgba(255,255,255,0.25);
}
.anchor-icon {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  background: rgba(192,57,43,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.anchor-title { font-size: 0.9rem; font-weight: 600; }
.anchor-sub   { font-size: 0.775rem; color: rgba(255,255,255,0.5); }

@media (min-width: 640px) {
  .hero { padding: 40px 16px 36px; }
  .hero h1 { font-size: 2.25rem; }
  .hero-anchors {
    grid-template-columns: repeat(4,1fr);
    max-width: 100%;
  }
}

/* ── SECCIONES ──────────────────────────────────────────────── */
.section-wrap {
  background: #ffffff;
  border-bottom: 1px solid #E9ECEF;
}
.section-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 20px 16px;
}
h2.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 1rem;
  font-weight: 600;
}
h2.section-title::before {
  content: '';
  display: block;
  width: 3px;
  height: 18px;
  background: #DA291C;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── FORMULARIO / INPUTS ────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
.form-group label {
  display: block;
  font-size: 0.75rem;
  color: #495057;
  margin-bottom: 4px;
  font-weight: 500;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid #DEE2E6;
  border-radius: 6px;
  background: #ffffff;
  color: #212529;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #0f69b4;
  box-shadow: 0 0 0 3px rgba(26,43,74,0.1);
}

/* ── BOTONES ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-primary {
  background: #0f69b4;
  color: #ffffff;
  width: 100%;
}
.btn-primary:hover { background: #0d5a9a; }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  background: transparent;
  color: #495057;
  border-color: #DEE2E6;
}
.btn-ghost:hover { background: #F1F3F5; }

.btn-sm {
  padding: 7px 12px;
  font-size: 0.8125rem;
}
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 6px;
}

/* Fila de botones exportación */
.export-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.export-row .btn { flex: 1; min-width: 80px; }

/* ── TABLA DE NOTAS ─────────────────────────────────────────── */
.tabla-wrap {
  border: 1px solid #E9ECEF;
  border-radius: 10px;
  overflow: hidden;
  margin-top: 14px;
}
.tabla-head {
  display: grid;
  grid-template-columns: 1fr 1fr 90px;
  background: #0f69b4;
  padding: 9px 14px;
}
.tabla-head span {
  font-size: 0.75rem;
  font-weight: 600;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.tabla-head span:last-child { text-align: right; }

.tabla-body { background: #ffffff; }
.tabla-row {
  display: grid;
  grid-template-columns: 1fr 1fr 90px;
  padding: 8px 14px;
  border-top: 1px solid #E9ECEF;
  align-items: center;
  transition: background 0.1s;
}
.tabla-row:hover { background: #F8F9FA; }
.tabla-row.repro { background: #FFF8F8; }
.tabla-row.repro:hover { background: #FEE8E7; }
.tabla-row span { font-size: 0.9375rem; color: #212529; }
.tabla-row .pct { font-size: 0.8125rem; color: #ADB5BD; }

.nota-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 700;
  float: right;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
}
.nota-repro  { background: #FEE8E7;  color: #DA291C;   border: 1px solid #F9C4C1; }
.nota-apro   { background: #D1FAE5;             color: #065F46;       border: 1px solid #A7F3D0; }
.nota-alta   { background: #A7F3D0;             color: #064E3B;       border: 1px solid #6EE7B7; }

.tabla-more {
  padding: 10px 14px;
  text-align: center;
  font-size: 0.8125rem;
  color: #ADB5BD;
  border-top: 1px solid #E9ECEF;
  background: #F8F9FA;
  cursor: pointer;
}
.tabla-more:hover { color: #0f69b4; }

/* ── RESULTADO CALCULADORA ──────────────────────────────────── */
.result-box {
  background: #0f69b4;
  border-radius: 10px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
}
.result-nota {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  line-height: 1;
}
.result-label { font-size: 0.75rem; color: rgba(255,255,255,0.55); margin-bottom: 4px; }
.result-estado {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 6px;
  font-weight: 600;
}
.result-estado.aprobado { background: rgba(167,243,208,0.2); color: #A7F3D0; }
.result-estado.reprobado { background: rgba(252,165,165,0.2); color: #FCA5A5; }
.result-meta { text-align: right; font-size: 0.8125rem; color: rgba(255,255,255,0.5); }
.result-meta span { display: block; margin-top: 3px; }

/* ── PROMEDIO ───────────────────────────────────────────────── */
.notas-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
  min-height: 36px;
}
.nota-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #F1F3F5;
  border: 1px solid #DEE2E6;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.875rem;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
}
.nota-chip button {
  background: none;
  border: none;
  font-size: 0.75rem;
  color: #ADB5BD;
  padding: 0;
  line-height: 1;
}
.nota-chip button:hover { color: #DA291C; }

.promedio-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 10px;
  margin-top: 4px;
}
.promedio-val {
  font-size: 2rem;
  font-weight: 700;
  color: #0f69b4;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
}
.promedio-meta { font-size: 0.8125rem; color: #ADB5BD; text-align: right; }
.promedio-meta strong { display: block; font-size: 0.875rem; color: #495057; font-weight: 600; }

/* ── ESCALAS FRECUENTES ─────────────────────────────────────── */
.freq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.freq-card {
  background: #ffffff;
  border: 1px solid #E9ECEF;
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  display: block;
}
.freq-card:hover {
  border-color: #0f69b4;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.freq-title { font-size: 0.875rem; font-weight: 600; color: #212529; margin-bottom: 2px; }
.freq-sub   { font-size: 0.75rem;  color: #ADB5BD; }
.freq-badge {
  display: inline-block;
  font-size: 0.6875rem;
  padding: 2px 7px;
  border-radius: 20px;
  background: #E6F0FA;
  color: #0f69b4;
  font-weight: 600;
  margin-top: 5px;
}

@media (min-width: 640px) {
  .freq-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── FAQ ────────────────────────────────────────────────────── */
.faq-cat-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0 10px;
}
.faq-cat-title::before {
  content: '';
  width: 3px;
  height: 13px;
  background: #DA291C;
  border-radius: 2px;
  flex-shrink: 0;
}
.faq-cat-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: #ADB5BD;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.faq-item {
  border-top: 1px solid #E9ECEF;
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.faq-q-text {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  flex: 1;
  color: #212529;
}
.faq-chevron {
  flex-shrink: 0;
  margin-top: 3px;
  color: #ADB5BD;
  transition: transform 0.2s;
}
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-a {
  font-size: 0.9375rem;
  color: #495057;
  line-height: 1.75;
  padding-bottom: 14px;
  display: none;
}
.faq-item.open .faq-a { display: block; }
.faq-a ul, .faq-a ol { padding-left: 18px; margin-top: 8px; }
.faq-a li { margin-bottom: 5px; }
.faq-formula {
  margin-top: 10px;
  padding: 10px 14px;
  background: #F8F9FA;
  border-left: 3px solid #DA291C;
  border-radius: 0 6px 6px 0;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: #212529;
}
.faq-highlight {
  margin-top: 10px;
  padding: 10px 14px;
  background: #E6F0FA;
  border-radius: 6px;
  font-size: 0.875rem;
  color: #0f69b4;
  line-height: 1.6;
}
.faq-example-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 6px;
  margin-top: 10px;
}
.faq-ex-card {
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 6px;
  padding: 8px 10px;
}
.faq-ex-label { font-size: 0.6875rem; color: #ADB5BD; margin-bottom: 3px; }
.faq-ex-val   { font-size: 0.875rem;  font-weight: 600; font-family: 'JetBrains Mono', 'Courier New', monospace; }

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
  background: #0a1f3d;
  padding: 40px 16px 0;
  margin-top: 2px;
}
.footer-inner {
  max-width: 860px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}
.footer-col {}
.footer-col-title {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.footer-list a {
  display: inline-block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  padding: 5px 0;
  line-height: 1.4;
  transition: color 0.15s;
  text-decoration: none;
}
.footer-list a:hover {
  color: #ffffff;
}
.footer-list a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.7rem;
  opacity: 0.45;
}


/* ── ADSEN PLACEHOLDERS ─────────────────────────────────────── */
.ad-slot {
  background: #F1F3F5;
  border: 1px dashed #DEE2E6;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: #ADB5BD;
  margin: 12px 0;
}
.ad-slot-banner  { height: 60px; }
.ad-slot-square  { height: 250px; }

/* ── UTILIDADES ─────────────────────────────────────────────── */
.text-center { text-align: center; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.hidden { display: none !important; }

/* ── PRINT ──────────────────────────────────────────────────── */
@media print {
  .site-header,
  .site-footer,
  .hero,
  .export-row,
  .btn,
  .ad-slot,
  .form-grid,
  .freq-grid,
  .faq-item { display: none !important; }

  .tabla-wrap { border: 1px solid #ccc; }
  .tabla-head { background: #0f69b4 !important; -webkit-print-color-adjust: exact; }
  .nota-pill  { border: 1px solid #ccc !important; }
  body { background: white; }
  .section-wrap { border: none; box-shadow: none; }

  .print-title {
    display: block !important;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
  }
}
.print-title { display: none; }

/* ── FOOTER EXTRAS ──────────────────────────────────────────── */
.footer-section-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.3);
  margin-bottom: 8px;
  margin-top: 0;
}
.footer-links a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.65rem;
  opacity: 0.4;
}
.footer-divider {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 20px 0 16px;
}


/* ── UX FEEDBACK — hints, errores, estados ──────────────────── */

/* Descripción de herramienta */
.tool-desc {
  font-size: 0.9rem;
  color: #495057;
  margin-bottom: 16px;
  padding: 10px 14px;
  background: #E6F0FA;
  border-left: 3px solid #0f69b4;
  border-radius: 0 6px 6px 0;
  line-height: 1.6;
}

/* Hint debajo del input */
.input-hint {
  display: block;
  font-size: 0.775rem;
  color: #ADB5BD;
  margin-top: 4px;
  line-height: 1.4;
  min-height: 1.2em;
  transition: color 0.15s;
}
.hint-info  { color: #0f69b4; }
.hint-ok    { color: #065F46; font-weight: 500; }
.hint-error { color: #DA291C; font-weight: 500; }

/* Estado de inputs */
.input-ok    { border-color: #065F46 !important; }
.input-error { border-color: #DA291C  !important; box-shadow: 0 0 0 2px rgba(192,57,43,0.12); }

/* Label optional badge */
.label-optional {
  font-size: 0.7rem;
  font-weight: 400;
  color: #ADB5BD;
  background: #F1F3F5;
  padding: 1px 6px;
  border-radius: 20px;
  margin-left: 5px;
  vertical-align: middle;
}

/* Alerta de error inline */
.alert-error {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  background: #FEE8E7;
  border: 1px solid #F9C4C1;
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 0.875rem;
  color: #DA291C;
  margin-top: 10px;
  line-height: 1.5;
}

/* Resumen escala generada */
.escala-resumen {
  font-size: 0.875rem;
  color: #495057;
  background: #D1FAE5;
  border-left: 3px solid #065F46;
  border-radius: 0 6px 6px 0;
  padding: 8px 14px;
  margin: 10px 0;
  line-height: 1.5;
}
.escala-resumen strong { color: #065F46; }

/* Spinner de carga */
.tabla-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 32px;
  font-size: 0.9rem;
  color: #ADB5BD;
}
.loading-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid #DEE2E6;
  border-top-color: #0f69b4;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── PROMEDIO — chips mejorados ─────────────────────────────── */
.notas-placeholder {
  font-size: 0.875rem;
  color: #ADB5BD;
  text-align: center;
  padding: 20px;
  border: 1.5px dashed #DEE2E6;
  border-radius: 10px;
  margin: 12px 0;
  line-height: 1.6;
}
.notas-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0;
}
.nota-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #ffffff;
  border: 1px solid #DEE2E6;
  border-radius: 6px;
  padding: 5px 8px 5px 10px;
  font-size: 0.875rem;
}
.chip-nota  { font-weight: 600; font-family: 'JetBrains Mono', 'Courier New', monospace; color: #0f69b4; }
.chip-peso  { font-size: 0.75rem; color: #ADB5BD; background: #F1F3F5; padding: 1px 5px; border-radius: 20px; }
.nota-chip button {
  background: none;
  border: none;
  font-size: 0.7rem;
  color: #ADB5BD;
  padding: 0 2px;
  line-height: 1;
  cursor: pointer;
  border-radius: 3px;
}
.nota-chip button:hover { color: #DA291C; background: #FEE8E7; }

/* Promedio box con estados */
.promedio-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 10px;
  margin-top: 8px;
  transition: border-color 0.2s, background 0.2s;
}
.promedio-box.prom-aprobado {
  background: #F0FDF4;
  border-color: #A7F3D0;
}
.promedio-box.prom-reprobado {
  background: #FFF8F8;
  border-color: #F9C4C1;
}
.promedio-val {
  font-size: 2.25rem;
  font-weight: 700;
  color: #0f69b4;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  line-height: 1;
}
.prom-aprobado .promedio-val { color: #065F46; }
.prom-reprobado .promedio-val { color: #DA291C; }

.promedio-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-end;
}
.prom-estado {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
}
.prom-estado.aprobado  { background: #D1FAE5; color: #065F46; }
.prom-estado.reprobado { background: #FEE8E7;  color: #DA291C;  }
.prom-detalle { font-size: 0.775rem; color: #ADB5BD; }
.prom-aviso   { font-size: 0.775rem; color: #B45309; background: #FEF3C7; padding: 2px 8px; border-radius: 20px; }

output.result-nota,
output.promedio-val {
  display: block;
}

/* ── FAQ SEMANTIC UPDATES ─────────────────────────────────── */
h3.faq-cat-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: #ADB5BD;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 16px 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
h3.faq-cat-title::before {
  content: '';
  width: 3px;
  height: 13px;
  background: #DA291C;
  border-radius: 2px;
  flex-shrink: 0;
}
button.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  -webkit-tap-highlight-color: transparent;
}
button.faq-q:focus-visible {
  outline: 2px solid #0f69b4;
  outline-offset: 2px;
  border-radius: 4px;
}
figure.faq-ex-card {
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 6px;
  padding: 8px 10px;
  margin: 0;
}
p.faq-ex-label {
  font-size: 0.6875rem;
  color: #ADB5BD;
  margin-bottom: 3px;
}
strong.faq-ex-val {
  font-size: 0.875rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  display: block;
}
pre.faq-formula {
  margin-top: 10px;
  padding: 10px 14px;
  background: #F8F9FA;
  border-left: 3px solid #DA291C;
  border-radius: 0 6px 6px 0;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: #212529;
  white-space: pre-wrap;
  word-break: break-word;
}
blockquote.faq-highlight {
  margin-top: 10px;
  padding: 10px 14px;
  background: #E6F0FA;
  border-left: 3px solid #0f69b4;
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
  color: #0f69b4;
  line-height: 1.6;
  quotes: none;
}

/* ── FOOTER BOTTOM — centrado, 2 líneas ────────────────────── */
.footer-bottom {
  padding: 20px 0;
  text-align: center;
}
.footer-copy {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  margin-bottom: 6px;
}
.footer-copy strong {
  color: rgba(255,255,255,0.85);
  font-weight: 700;
  letter-spacing: 0.03em;
}
.footer-disclaimer {
  display: block;
  font-size: 0.775rem;
  color: rgba(255,255,255,0.25);
}

/* ══════════════════════════════════════════════════════════════
   FAQ — diseño limpio y espaciado
   ══════════════════════════════════════════════════════════════ */

h3.faq-cat-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #ADB5BD;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin: 28px 0 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid #E9ECEF;
}
h3.faq-cat-title::before {
  content: '';
  width: 3px;
  height: 12px;
  background: #DA291C;
  border-radius: 2px;
  flex-shrink: 0;
}
h3.faq-cat-title:first-of-type {
  margin-top: 8px;
}

.faq-item {
  border-bottom: 1px solid #E9ECEF;
}
.faq-item:last-child {
  border-bottom: none;
}

button.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  -webkit-tap-highlight-color: transparent;
}
button.faq-q:focus-visible {
  outline: 2px solid #0f69b4;
  outline-offset: 2px;
  border-radius: 4px;
}
button.faq-q:hover .faq-q-text {
  color: #0f69b4;
}

.faq-q-text {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.45;
  flex: 1;
  color: #212529;
  transition: color 0.15s;
}

.faq-chevron {
  flex-shrink: 0;
  margin-top: 3px;
  color: #ADB5BD;
  transition: transform 0.2s;
}
.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-a {
  display: none;
  padding: 0 0 18px;
}
.faq-item.open .faq-a {
  display: block;
}
.faq-a p {
  font-size: 0.9375rem;
  color: #495057;
  line-height: 1.75;
  margin-bottom: 10px;
}
.faq-a p:last-child {
  margin-bottom: 0;
}
.faq-a ol,
.faq-a ul {
  padding-left: 20px;
  margin: 8px 0 10px;
}
.faq-a li {
  font-size: 0.9375rem;
  color: #495057;
  line-height: 1.7;
  margin-bottom: 6px;
}

pre.faq-formula {
  background: #F8F9FA;
  border-left: 3px solid #DA291C;
  border-radius: 0 6px 6px 0;
  padding: 12px 16px;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.8125rem;
  line-height: 1.9;
  color: #212529;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 10px 0;
}

blockquote.faq-highlight {
  background: #E6F0FA;
  border-left: 3px solid #0f69b4;
  border-radius: 0 6px 6px 0;
  padding: 10px 16px;
  font-size: 0.875rem;
  color: #0d5a9a;
  line-height: 1.6;
  margin: 10px 0 0;
  quotes: none;
}

.faq-example-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0 0;
}
@media (max-width: 480px) {
  .faq-example-grid { grid-template-columns: 1fr; }
}

figure.faq-ex-card {
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 8px;
  padding: 10px 12px;
  margin: 0;
}
p.faq-ex-label {
  font-size: 0.6875rem;
  color: #ADB5BD;
  margin-bottom: 4px;
  line-height: 1.3;
}
strong.faq-ex-val {
  font-size: 0.9375rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  color: #212529;
  display: block;
}

/* ── BREADCRUMB ─────────────────────────────────────────────── */
.breadcrumb {
  background: #0f69b4;
  padding: 0 16px;
}
.breadcrumb-inner {
  max-width: 860px;
  margin: 0 auto;
  padding: 7px 0;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.55);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb-inner a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.15s;
}
.breadcrumb-inner a:hover { color: #ffffff; }
.breadcrumb-inner span[aria-hidden] { color: rgba(255,255,255,0.3); }
.breadcrumb-inner span:last-child { color: rgba(255,255,255,0.9); }

/* ── CONVERSOR ──────────────────────────────────────────────── */
.conversor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 4px;
}
@media (max-width: 560px) {
  .conversor-grid { grid-template-columns: 1fr; }
}
.conversor-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  color: #495057;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #E9ECEF;
}
.conversor-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* ── CONTACTO ───────────────────────────────────────────────── */
.contact-form {
  max-width: 560px;
}
.contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9375rem;
  border: 1px solid #DEE2E6;
  border-radius: 6px;
  background: #fff;
  color: #212529;
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
  line-height: 1.6;
}
.contact-form textarea:focus {
  outline: none;
  border-color: #0f69b4;
  box-shadow: 0 0 0 3px rgba(15,105,180,0.12);
}
.contact-form select {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9375rem;
  border: 1px solid #DEE2E6;
  border-radius: 6px;
  background: #fff;
  color: #212529;
  cursor: pointer;
}
.contact-form select:focus {
  outline: none;
  border-color: #0f69b4;
  box-shadow: 0 0 0 3px rgba(15,105,180,0.12);
}
.alert-success {
  background: #D1FAE5;
  border: 1px solid #A7F3D0;
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: #065F46;
  margin: 10px 0;
}

/* ── CALCULADORA NOTAS PORCENTAJE ───────────────────────────── */
.parte-row {
  background: #F8F9FA;
  border: 1px solid #E9ECEF;
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.parte-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.parte-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #0f69b4;
}
.btn-remove-parte {
  background: none;
  border: none;
  font-size: 0.75rem;
  color: #ADB5BD;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  display: none;
}
.btn-remove-parte:hover { color: #DA291C; background: #FEE8E7; }
.parte-resultado {
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: 8px;
  min-height: 1.4em;
}

/* ── H1 KEYWORD HIGHLIGHT ───────────────────────────────────── */
.h1-highlight {
  color: #ffffff;
  background: rgba(218,41,28,0.35);
  padding: 0 6px;
  border-radius: 4px;
  font-style: normal;
}