:root {
  --primary: #9ca3af;
  /* gris medio */
  --primary-strong: #fbfbfb;
  /* gris oscuro para énfasis */
  --primary-bg: #111827;
  /* fondo base oscuro */
  --accent: #e5e7eb;
  /* gris muy claro para resaltes */
  --accent-soft: #1f2937;
  /* bloques suaves */
  --sun: #f3f4f6;
  /* texto o fondos claros */
  --clay: #0b0f17;
  /* paneles profundos */
  --ink: #e5e7eb;
  /* texto principal claro */
  --surface: #0f172a;
  /* tarjetas */
  --border-radius-lg: 1rem;
  --primary-rgb: 156, 163, 175;
  --accent-rgb: 229, 231, 235;
  --sun-rgb: 243, 244, 246;
  --clay-rgb: 11, 15, 23;
  --muted-rgb: 148, 163, 184;
  --shadow-rgb: 0, 0, 0;
  --body-bg-start: #f5f5f5;
  --body-bg-mid: #ffffff;
  --body-bg-end: #f5f5f5;
  --hero-grad-start: #ffffff;
  --hero-grad-mid: #f5f5f5;
  --hero-grad-end: #ffffff;
  --muted-rgb: rgba(0, 0, 0, 0.75);
  --black-rgb: 0, 0, 0;
}

body {
  background: linear-gradient(180deg, var(--body-bg-start), var(--body-bg-mid) 60%, var(--body-bg-end));
  color: #1f2937;
}

.hero-section {
  background: #262121;
  color: #e5e7eb;
}

.hero-overlay {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.card {
  background-color: #f3f4f6;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  color: #111827;
}

.btn-primary,
.btn-outline-primary:hover {
  background: linear-gradient(135deg, #111827, #1f2937);
  border-color: #0f172a;
  color: #f9fafb;
  box-shadow: 0 10px 24px -14px rgba(0, 0, 0, 0.4);
}

.btn-outline-primary {
  color: #111827;
  border-color: #1f2937;
}

.badge {
  background-color: #111827 !important;
  color: #111827 !important;
}

input.form-control,
select.form-select,
textarea.form-control {
  background-color: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #111827;
}

input.form-control:focus,
select.form-select:focus,
textarea.form-control:focus {
  border-color: #6b7280;
  box-shadow: 0 0 0 0.15rem rgba(107, 114, 128, 0.2);
  background-color: #ffffff;
}

.table {
  color: #1f2937;
}

.table thead {
  color: #4b5563;
}

.modal-content {
  background-color: #ffffff;
  color: #111827;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.text-muted {
  color: rgba(0, 0, 0, 0.75) !important;
}

.badge.bg-primary-subtle {
  background-color: #111827 !important;
  color: #f9fafb !important;
  border: 1px solid #0b1324;
}

/* ---- Tarjetas de clases y métricas con acento visible ---- */
.class-card,
.schedule-class-card,
.metric-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(59, 130, 246, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #0b1324;
}

.schedule-class-time,
.metric-label {
  color: #1d4ed8;
}

.schedule-class-title {
  font-size: 1rem;
  font-weight: 700;
  color: #0b1324;
}

.metric-card {
  box-shadow: 0 10px 28px -18px rgba(0, 0, 0, 0.25);
}

.schedule-table th {
  background: #000000 !important;
  color: #f9fafb !important;
  border-bottom: 2px solid #0b1324 !important;
  text-transform: capitalize;
}

.schedule-date {
  color: #f9fafb !important;
}

.schedule-table td {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
}

.schedule-column {
  background: #111827;
  border: 1px solid #0b1324;
  border-radius: 0.75rem;
  padding: 0.35rem;
}

/* Refuerzo visual para tarjetas de clases (horario) */
.schedule-class-card {
  box-shadow: 0 12px 28px -18px rgba(0, 0, 0, 0.25);
}

.schedule-class-card:hover {
  box-shadow: 0 16px 34px -18px rgba(0, 0, 0, 0.32);
  border-color: rgba(59, 130, 246, 0.55);
}

.schedule-class-card:focus {
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.4);
}

.schedule-class-meta {
  color: #334155;
  font-weight: 600;
}

/* ---- Listado de clientes (pagos) con más contraste ---- */
#client-list .list-group-item {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  color: #0f172a;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

#client-list .list-group-item:hover {
  background: #e5e7eb;
  color: #0b1324;
}

#client-list .list-group-item.active {
  background: #111827;
  color: #f9fafb;
  border-color: #111827;
}

#client-list .list-group-item .small {
  color: rgba(55, 65, 81, 0.85);
}

#client-list .list-group-item.active .small {
  color: rgba(229, 231, 235, 0.9);
}

/* ---- Listado de clientes en Administración > Mensualidades ---- */
#payments-client-list .list-group-item {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  color: #0f172a;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

#payments-client-list .list-group-item:hover {
  background: #e5e7eb;
  color: #0b1324;
}

#payments-client-list .list-group-item.active {
  background: #111827;
  color: #f9fafb;
  border-color: #111827;
}

#payments-client-list .list-group-item .small {
  color: rgba(55, 65, 81, 0.85);
}

#payments-client-list .list-group-item.active .small {
  color: rgba(229, 231, 235, 0.9);
}

/* ---- Listado de clientes en Dashboard > Administración (panel Payments) ---- */
#adminAccordion #panelPayments .list-group-item {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  color: #0f172a;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

#adminAccordion #panelPayments .list-group-item:hover {
  background: #e5e7eb;
  color: #0b1324;
}

#adminAccordion #panelPayments .list-group-item.active {
  background: #111827;
  color: #f9fafb;
  border-color: #111827;
}

#adminAccordion #panelPayments .list-group-item .small {
  color: rgba(55, 65, 81, 0.85);
}

#adminAccordion #panelPayments .list-group-item.active .small {
  color: rgba(229, 231, 235, 0.9);
}

/* ---- Listado de clientes en Administración > Gestión de clientes ---- */
#clientPane #clientsAccordion .accordion-button {
  background: #f8fafc;
  color: #0f172a;
  border: 1px solid #e5e7eb;
  border-radius: 0.85rem;
  padding: 0.65rem 1rem;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

#clientPane #clientsAccordion .accordion-button:not(.collapsed) {
  background: #111827;
  color: #f9fafb;
  border-color: #111827;
  box-shadow: 0 12px 30px -20px rgba(0, 0, 0, 0.35);
}

#clientPane #clientsAccordion .accordion-button::after {
  filter: invert(25%);
}

#clientPane #clientsAccordion .accordion-button:not(.collapsed)::after {
  filter: invert(90%);
}

#clientPane #clientsAccordion .accordion-item {
  border: none;
  margin-bottom: 0.6rem;
}

#clientPane #clientsAccordion .accordion-body {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 0 0 0.85rem 0.85rem;
  margin-top: -1px;
}