/* ==========================================================================
   GLOBAL UTILITIES & CORE COMPONENTS
   Instituto de Educación Superior Tecnológico Público "Nueva Esperanza"
   ========================================================================== */

/* Typography */
h1, .h1 { font-size: var(--text-3xl); font-weight: 800; color: var(--text-primary); letter-spacing: -0.025em; }
h2, .h2 { font-size: var(--text-2xl); font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; }
h3, .h3 { font-size: var(--text-xl); font-weight: 600; color: var(--text-primary); }
h4, .h4 { font-size: var(--text-lg); font-weight: 600; color: var(--text-primary); }
p { font-size: var(--text-base); color: var(--text-secondary); }
small, .text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-muted { color: var(--text-muted); }
.text-primary-color { color: var(--primary); }
.text-secondary-color { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Layout Helpers */
.container {
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* Card Component */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  border-color: rgba(var(--primary-rgb), 0.3);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-inverse);
  box-shadow: 0 2px 4px rgba(var(--primary-rgb), 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(var(--primary-rgb), 0.35);
}

.btn-secondary {
  background-color: var(--secondary);
  color: #ffffff;
}

.btn-secondary:hover {
  background-color: var(--secondary-hover);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--bg-surface-alt);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-success {
  background-color: var(--success);
  color: #ffffff;
}

.btn-success:hover {
  filter: brightness(0.9);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
}

.btn-danger:hover {
  filter: brightness(0.9);
}

.btn-warning {
  background-color: var(--warning);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Badge System */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.2rem 0.65rem;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.badge-success { background-color: var(--success-light); color: var(--success); border: 1px solid rgba(46, 125, 50, 0.2); }
.badge-danger { background-color: var(--danger-light); color: var(--danger); border: 1px solid rgba(211, 47, 47, 0.2); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); border: 1px solid rgba(237, 108, 2, 0.2); }
.badge-info { background-color: var(--info-light); color: var(--info); border: 1px solid rgba(2, 136, 209, 0.2); }
.badge-neutral { background-color: var(--badge-bg); color: var(--badge-text); border: 1px solid var(--border-color); }
.badge-primary { background-color: var(--primary-light); color: var(--primary); border: 1px solid rgba(var(--primary-rgb), 0.2); }

/* Alerts / Banners */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}

.alert-info { background-color: var(--info-light); color: #01579b; border-left: 4px solid var(--info); }
.alert-success { background-color: var(--success-light); color: #1b5e20; border-left: 4px solid var(--success); }
.alert-warning { background-color: var(--warning-light); color: #e65100; border-left: 4px solid var(--warning); }
.alert-danger { background-color: var(--danger-light); color: #b71c1c; border-left: 4px solid var(--danger); }

/* SVG Icon Helper */
.icon {
  width: 1.25rem;
  height: 1.25rem;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-sm { width: 1rem; height: 1rem; }
.icon-lg { width: 1.5rem; height: 1.5rem; }
.icon-xl { width: 2rem; height: 2rem; }

/* Toast Notifications Container */
#toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 420px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border-left: 5px solid var(--primary);
  border: 1px solid var(--border-color);
  animation: slideInRight var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
  font-size: var(--text-sm);
}

.toast.toast-success { border-left: 5px solid var(--success); }
.toast.toast-error { border-left: 5px solid var(--danger); }
.toast.toast-warning { border-left: 5px solid var(--warning); }
.toast.toast-info { border-left: 5px solid var(--info); }

/* Modal Backdrop & Container */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--border-color);
}

.modal-backdrop.active .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-dialog.modal-lg { max-width: 850px; }
.modal-dialog.modal-xl { max-width: 1100px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-light);
  background-color: var(--bg-surface-alt);
  border-bottom-left-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}