/* Variables CSS mejoradas para una apariencia más moderna */
:root {
  /* Colores principales con mejor contraste y modernidad */
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #dbeafe;
  --secondary-color: #64748b;
  --secondary-hover: #475569;
  --success-color: #10b981;
  --success-light: #d1fae5;
  --danger-color: #ef4444;
  --danger-light: #fee2e2;
  --warning-color: #f59e0b;
  --warning-light: #fef3c7;

  /* Colores de fondo y texto mejorados */
  --dark-color: #0f172a;
  --light-color: #f8fafc;
  --background-color: #ffffff;
  --surface-color: #f1f5f9;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --text-color: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* Sombras modernas y elegantes */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Bordes y transiciones mejoradas */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  /* Gradientes modernos */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --gradient-secondary: linear-gradient(135deg, #64748b 0%, #475569 100%);
  --gradient-surface: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

/* Reset mejorado */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

*::before,
*::after {
  box-sizing: border-box;
}

/* Estilos base mejorados */
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--background-color);
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

/* Contenedor principal mejorado */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Tipografía mejorada */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-color);
  letter-spacing: -0.025em;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 2.25rem;
  font-weight: 700;
}

h3 {
  font-size: 1.875rem;
  font-weight: 600;
}

h4 {
  font-size: 1.5rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

/* Enlaces mejorados */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

a:hover {
  color: var(--primary-hover);
}

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Botones completamente rediseñados */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  transform: translateY(0);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-secondary {
  background: var(--gradient-secondary);
  color: white;
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-success {
  background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
  color: white;
  box-shadow: var(--shadow);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
  color: white;
  box-shadow: var(--shadow);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn:disabled {
  background: var(--border-color);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 1.125rem 2.25rem;
  font-size: 1rem;
}

/* Formularios mejorados */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-color);
  font-size: 0.875rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  transition: var(--transition);
  background: var(--background-color);
  color: var(--text-color);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

.form-control:hover {
  border-color: var(--border-hover);
}

.form-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  background: var(--background-color);
  cursor: pointer;
  transition: var(--transition);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.75rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Alertas mejoradas */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  border-left: 4px solid;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.alert::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
}

.alert-success {
  background: var(--success-light);
  color: #065f46;
  border-left-color: var(--success-color);
}

.alert-danger {
  background: var(--danger-light);
  color: #991b1b;
  border-left-color: var(--danger-color);
}

.alert-warning {
  background: var(--warning-light);
  color: #92400e;
  border-left-color: var(--warning-color);
}

/* Tarjetas completamente rediseñadas */
.card {
  background: var(--gradient-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--primary-color);
}

.card-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: rgba(248, 250, 252, 0.8);
  backdrop-filter: blur(10px);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: rgba(248, 250, 252, 0.5);
  backdrop-filter: blur(10px);
}

/* Tablas mejoradas */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.table th,
.table td {
  padding: 1rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  font-weight: 600;
  background: var(--gradient-surface);
  color: var(--text-color);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table-striped tbody tr:nth-child(odd) {
  background: rgba(248, 250, 252, 0.5);
}

.table tbody tr:hover {
  background: var(--primary-light);
  transform: scale(1.01);
}

/* Grid system mejorado */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -12px;
}

.col {
  flex: 1;
  padding: 0 12px;
}

.col-md-3 {
  flex: 0 0 25%;
}
.col-md-4 {
  flex: 0 0 33.333333%;
}
.col-md-6 {
  flex: 0 0 50%;
}
.col-md-8 {
  flex: 0 0 66.666667%;
}
.col-md-9 {
  flex: 0 0 75%;
}
.col-md-12 {
  flex: 0 0 100%;
}

/* Utilidades mejoradas */
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.text-muted {
  color: var(--text-muted);
}
.text-light {
  color: var(--text-light);
}
.text-primary {
  color: var(--primary-color);
}
.text-success {
  color: var(--success-color);
}
.text-danger {
  color: var(--danger-color);
}

.mb-1 {
  margin-bottom: 0.25rem;
}
.mb-2 {
  margin-bottom: 0.5rem;
}
.mb-3 {
  margin-bottom: 1rem;
}
.mb-4 {
  margin-bottom: 1.5rem;
}
.mb-5 {
  margin-bottom: 3rem;
}

.mt-1 {
  margin-top: 0.25rem;
}
.mt-2 {
  margin-top: 0.5rem;
}
.mt-3 {
  margin-top: 1rem;
}
.mt-4 {
  margin-top: 1.5rem;
}
.mt-5 {
  margin-top: 3rem;
}

.p-1 {
  padding: 0.25rem;
}
.p-2 {
  padding: 0.5rem;
}
.p-3 {
  padding: 1rem;
}
.p-4 {
  padding: 1.5rem;
}

.d-flex {
  display: flex;
}
.align-items-center {
  align-items: center;
}
.justify-content-center {
  justify-content: center;
}
.justify-content-between {
  justify-content: space-between;
}

.position-relative {
  position: relative;
}
.position-absolute {
  position: absolute;
}

/* Animaciones globales */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* Responsive mejorado */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .row {
    margin: 0 -8px;
  }

  .col {
    padding: 0 8px;
  }

  .col-md-3,
  .col-md-4,
  .col-md-6,
  .col-md-8,
  .col-md-9 {
    flex: 0 0 100%;
    margin-bottom: 1rem;
  }

  h1 {
    font-size: 2.25rem;
  }
  h2 {
    font-size: 1.875rem;
  }
  h3 {
    font-size: 1.5rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
  }

  .btn-lg {
    padding: 1rem 2rem;
  }
}

/* Estados de carga mejorados */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Mejoras de accesibilidad */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus visible mejorado */
*:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-color);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}