/* ========== Variables y base ========== */
:root {
  --app-primary: #4f46e5;
  --app-primary-hover: #4338ca;
  --app-nav-bg: #1e293b;
  --app-nav-text: rgba(255, 255, 255, 0.9);
  --app-nav-hover: #fff;
  --app-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --app-card-radius: 10px;
  --app-page-header-mb: 1.5rem;
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html { font-size: 16px; }
}

body {
  margin-bottom: 60px;
  background-color: #f8fafc;
  color: #334155;
}

/* ========== Focus y accesibilidad ========== */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus,
.form-control:focus, .form-select:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.25);
}

/* ========== Layout principal ========== */
.app-main {
  min-height: calc(100vh - 56px - 60px);
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

/* ========== Encabezados de página ========== */
.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: var(--app-page-header-mb);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #0f172a;
  margin: 0;
}

/* ========== Tarjetas ========== */
.card.app-card {
  border: none;
  border-radius: var(--app-card-radius);
  box-shadow: var(--app-card-shadow);
  margin-bottom: 1.5rem;
}

.card.app-card .card-header {
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  font-weight: 600;
  padding: 1rem 1.25rem;
  border-radius: var(--app-card-radius) var(--app-card-radius) 0 0;
}

.card.app-card .card-body {
  padding: 1.25rem;
}

/* ========== Tablas ========== */
.table-app {
  margin-bottom: 0;
}

.table-app thead th {
  font-weight: 600;
  color: #475569;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-bottom: 1px solid #e2e8f0;
  padding: 0.75rem 1rem;
  background: #f8fafc;
}

.table-app tbody td {
  padding: 0.875rem 1rem;
  vertical-align: middle;
}

.table-app tbody tr:hover {
  background-color: #f8fafc;
}

/* ========== Botones de acción en tablas ========== */
.btn-actions .btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.8125rem;
}

.btn-actions .btn + .btn {
  margin-left: 0.25rem;
}

/* ========== Botones primarios ========== */
.btn-primary {
  background-color: var(--app-primary);
  border-color: var(--app-primary);
}

.btn-primary:hover {
  background-color: var(--app-primary-hover);
  border-color: var(--app-primary-hover);
}

.btn-outline-primary {
  color: var(--app-primary);
  border-color: var(--app-primary);
}

.btn-outline-primary:hover {
  background-color: var(--app-primary);
  border-color: var(--app-primary);
  color: #fff;
}

/* ========== Formularios ========== */
.form-label {
  font-weight: 500;
  color: #475569;
  margin-bottom: 0.35rem;
}

.form-control, .form-select {
  border-radius: 6px;
  border-color: #cbd5e1;
}

.form-control:focus, .form-select:focus {
  border-color: var(--app-primary);
}

.mb-3 .form-control, .mb-3 .form-select {
  margin-bottom: 0;
}

/* ========== Listas de definición (Details) ========== */
.dl-app dt {
  font-weight: 600;
  color: #64748b;
  font-size: 0.875rem;
  padding-top: 0.75rem;
  padding-bottom: 0.25rem;
}

.dl-app dd {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #f1f5f9;
}

.dl-app dd:last-of-type { border-bottom: none; }

/* ========== Footer ========== */
.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  white-space: nowrap;
  line-height: 60px;
  background: #fff;
  border-top: 1px solid #e2e8f0;
  color: #64748b;
  font-size: 0.875rem;
}

.footer a {
  color: var(--app-primary);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.border-top { border-top: 1px solid #e2e8f0; }
.box-shadow { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06); }

/* ========== Página de login ========== */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.login-card {
  width: 100%;
  max-width: 400px;
  border: none;
  border-radius: var(--app-card-radius);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.login-card .card-body {
  padding: 2rem;
}

.login-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.login-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: 1.5rem;
}

.login-card .form-control {
  padding: 0.6rem 0.75rem;
}

.login-card .btn-primary {
  padding: 0.6rem 1rem;
  font-weight: 600;
}

.login-footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
  color: #64748b;
  font-size: 0.875rem;
}