/**
 * Unified Button System
 * Professional, theme-aware button classes for the STO Dashboard
 * Replaces emoji-based buttons with clear visual hierarchy
 */

/* ============================================
   BASE BUTTON CLASS
   ============================================ */

.bento-btn {
  /* Layout */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  min-width: auto;
  
  /* Typography */
  font-family: var(--font-family, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  text-align: center;
  white-space: nowrap;
  
  /* Appearance */
  background: var(--color-bg-secondary, #1e293b);
  color: var(--color-text-primary, #e2e8f0);
  border: 1px solid var(--color-border-primary, #334155);
  border-radius: var(--radius-sm, 4px);
  
  /* Interaction */
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  transition: all 0.15s ease;
  
  /* Accessibility */
  outline: none;
}

/* ============================================
   BUTTON HIERARCHY
   ============================================ */

/* Primary: Critical actions (Save, Foundation, Mission) */
.bento-btn--primary {
  background: var(--color-accent-blue, #3b82f6);
  color: #fff;
  border-color: var(--color-accent-blue, #3b82f6);
  font-weight: 600;
}

.bento-btn--primary:hover {
  background: var(--color-accent-blue-hover, #2563eb);
  border-color: var(--color-accent-blue-hover, #2563eb);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.bento-btn--primary:active {
  background: var(--color-accent-blue-active, #1d4ed8);
  transform: translateY(1px);
}

/* Secondary: View controls, grouped actions */
.bento-btn--secondary {
  background: var(--color-bg-tertiary, #0f172a);
  color: var(--color-text-secondary, #94a3b8);
  border-color: var(--color-border-secondary, #475569);
}

.bento-btn--secondary:hover {
  background: var(--color-bg-secondary, #1e293b);
  color: var(--color-text-primary, #e2e8f0);
  border-color: var(--color-border-primary, #334155);
}

.bento-btn--secondary:active {
  background: var(--color-bg-primary, #0f172a);
  transform: translateY(1px);
}

/* Tertiary: Utility actions (minimal styling) */
.bento-btn--tertiary {
  background: transparent;
  color: var(--color-text-tertiary, #64748b);
  border-color: transparent;
}

.bento-btn--tertiary:hover {
  background: var(--color-bg-tertiary, #0f172a);
  color: var(--color-text-secondary, #94a3b8);
  border-color: var(--color-border-subtle, #1e293b);
}

/* ============================================
   BUTTON SIZES
   ============================================ */

.bento-btn--sm {
  padding: 4px 8px;
  font-size: 12px;
  min-width: 60px;
}

.bento-btn--lg {
  padding: 10px 20px;
  font-size: 14px;
  min-width: 120px;
}

/* ============================================
   SEMANTIC VARIANTS
   ============================================ */

.bento-btn--success {
  background: var(--color-accent-green, #10b981);
  color: #fff;
  border-color: var(--color-accent-green, #10b981);
}

.bento-btn--success:hover {
  background: var(--color-accent-green-hover, #059669);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.bento-btn--warning {
  background: var(--color-accent-yellow, #f59e0b);
  color: #fff;
  border-color: var(--color-accent-yellow, #f59e0b);
}

.bento-btn--warning:hover {
  background: var(--color-accent-yellow-hover, #d97706);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.bento-btn--danger {
  background: var(--color-accent-red, #ef4444);
  color: #fff;
  border-color: var(--color-accent-red, #ef4444);
}

.bento-btn--danger:hover {
  background: var(--color-accent-red-hover, #dc2626);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

/* ============================================
   BUTTON STATES
   ============================================ */

.bento-btn:disabled,
.bento-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.bento-btn:focus-visible {
  outline: 2px solid var(--color-focus, #60a5fa);
  outline-offset: 2px;
}

.bento-btn.active {
  background: var(--color-accent-blue, #3b82f6);
  color: #fff;
  border-color: var(--color-accent-blue, #3b82f6);
}

/* ============================================
   DROPDOWN BUTTONS
   ============================================ */

.bento-btn--dropdown {
  position: relative;
  padding-right: 24px;
}

.bento-btn--dropdown .dropdown-chevron {
  margin-left: 4px;
  font-size: 10px;
  opacity: 0.7;
  transition: transform 0.2s ease;
}

.bento-btn--dropdown:hover .dropdown-chevron {
  opacity: 1;
}

.bento-btn--dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
}

/* ============================================
   BUTTON GROUPS
   ============================================ */

.bento-btn-group {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.bento-btn-group .bento-btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
}

.bento-btn-group .bento-btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

/* ============================================
   BUTTON DIVIDER
   ============================================ */

.bento-btn-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border-primary, #334155);
  margin: 0 8px;
}

/* ============================================
   DROPDOWN MENU
   ============================================ */

.bento-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 180px;
  background: var(--color-bg-secondary, #1e293b);
  border: 1px solid var(--color-border-primary, #334155);
  border-radius: var(--radius-md, 6px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  padding: 4px;
  animation: dropdownSlideIn 0.15s ease;
}

@keyframes dropdownSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.bento-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 400;
  text-align: left;
  color: var(--color-text-secondary, #94a3b8);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.1s ease;
  white-space: nowrap;
}

.bento-dropdown-item:hover {
  background: var(--color-bg-tertiary, #0f172a);
  color: var(--color-text-primary, #e2e8f0);
}

.bento-dropdown-item:active {
  background: var(--color-bg-primary, #0f172a);
}

/* ============================================
   ICON BUTTONS
   ============================================ */

.bento-btn--icon-only {
  padding: 6px;
  min-width: 32px;
  aspect-ratio: 1;
}

/* ============================================
   LOADING STATE
   ============================================ */

.bento-btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.bento-btn--loading::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  top: 50%;
  left: 50%;
  margin-left: -7px;
  margin-top: -7px;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: btnSpinner 0.6s linear infinite;
}

@keyframes btnSpinner {
  to { transform: rotate(360deg); }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .bento-btn,
  .bento-dropdown-menu,
  .bento-btn--loading::after {
    animation: none;
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: more) {
  .bento-btn {
    border-width: 2px;
  }
}

/* ============================================
   LEGACY COMPATIBILITY
   ============================================ */

/* Map old .control-btn to new system for gradual migration */
.control-btn {
  /* Inherit from bento-btn--secondary */
  background: var(--color-bg-tertiary, #0f172a);
  color: var(--color-text-secondary, #94a3b8);
  border: 1px solid var(--color-border-secondary, #475569);
  padding: 6px 12px;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.control-btn:hover {
  background: var(--color-bg-secondary, #1e293b);
  color: var(--color-text-primary, #e2e8f0);
  border-color: var(--color-border-primary, #334155);
}