.kb-button {
  --kb-button-background: linear-gradient(135deg, #43e97b 0%, #2ecc71 100%);
  --kb-button-background-hover: linear-gradient(135deg, #4cff8c 0%, #3ae67a 100%);
  --kb-button-depth: #27a65a;
  --kb-button-shadow: rgba(67, 233, 123, 0.35);
  --kb-button-text: var(--kb-color-text-on-action);
  --kb-button-text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);

  align-items: center;
  appearance: none;
  background: var(--kb-button-background);
  border: 2px solid var(--kb-color-action-accent);
  border-radius: 8px;
  box-shadow: 0 4px 0 var(--kb-button-depth), 0 3px 9px var(--kb-button-shadow);
  box-sizing: border-box;
  color: var(--kb-button-text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  gap: 6px;
  justify-content: center;
  letter-spacing: 0.5px;
  min-height: 38px;
  padding: 8px 14px;
  position: relative;
  text-decoration: none;
  text-shadow: var(--kb-button-text-shadow);
  text-transform: uppercase;
  transition: background 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease, transform 0.2s ease;
}

.kb-button:hover {
  background: var(--kb-button-background-hover);
  box-shadow: 0 7px 0 var(--kb-button-depth), 0 7px 18px var(--kb-button-shadow);
  color: var(--kb-button-text);
  filter: brightness(1.05);
  text-decoration: none;
  transform: translateY(-2px) scale(1.01);
}

.kb-button:active {
  box-shadow: 0 2px 0 var(--kb-button-depth), 0 2px 6px var(--kb-button-shadow);
  filter: brightness(0.95);
  transform: translateY(1px) scale(0.99);
}

.kb-button:focus-visible {
  outline: 3px solid var(--kb-color-focus-ring);
  outline-offset: 4px;
}

.kb-button:disabled,
.kb-button[aria-disabled="true"] {
  cursor: not-allowed;
  filter: grayscale(0.3);
  opacity: 0.6;
  pointer-events: none;
}

.kb-button--create,
.kb-button--confirm {
  --kb-button-background: linear-gradient(135deg, #43e97b 0%, #2ecc71 100%);
  --kb-button-background-hover: linear-gradient(135deg, #4cff8c 0%, #3ae67a 100%);
  --kb-button-depth: #27a65a;
  --kb-button-shadow: rgba(67, 233, 123, 0.35);
}

.kb-button--edit,
.kb-button--primary,
.kb-button--view {
  --kb-button-background: linear-gradient(135deg, #42a5f5 0%, #1976d2 100%);
  --kb-button-background-hover: linear-gradient(135deg, #64b5f6 0%, #1e88e5 100%);
  --kb-button-depth: #0d47a1;
  --kb-button-shadow: rgba(66, 165, 245, 0.35);
}

.kb-button--secondary {
  --kb-button-background: linear-gradient(135deg, #78909c 0%, #546e7a 100%);
  --kb-button-background-hover: linear-gradient(135deg, #90a4ae 0%, #607d8b 100%);
  --kb-button-depth: #37474f;
  --kb-button-shadow: rgba(84, 110, 122, 0.35);
}

.kb-button--warning {
  --kb-button-background: linear-gradient(135deg, #ffd54f 0%, #f9a825 100%);
  --kb-button-background-hover: linear-gradient(135deg, #ffe082 0%, #fbc02d 100%);
  --kb-button-depth: #b26a00;
  --kb-button-shadow: rgba(249, 168, 37, 0.35);
  --kb-button-text: #212529;
  --kb-button-text-shadow: none;
}

.kb-button--delete {
  --kb-button-background: linear-gradient(135deg, #ff4444 0%, #cc0000 100%);
  --kb-button-background-hover: linear-gradient(135deg, #ff5e5e 0%, #e60000 100%);
  --kb-button-depth: #990000;
  --kb-button-shadow: rgba(255, 68, 68, 0.35);
}

.kb-button--icon {
  flex: 0 0 38px;
  height: 38px;
  padding: 6px;
  width: 38px;
}

.kb-button--wide {
  max-width: 280px;
  min-width: 220px;
}

.kb-button-group {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.kb-button-group--section {
  margin: 20px 0;
}

.kb-button-cell {
  padding: 8px;
  text-align: center;
  vertical-align: middle;
}

.kb-button-cell .kb-button-group {
  flex-wrap: nowrap;
  white-space: nowrap;
}

.kb-button[data-tooltip] {
  overflow: visible;
}

.kb-button[data-tooltip]::after {
  background: rgba(0, 0, 0, 0.85);
  border-radius: 3px;
  bottom: calc(100% + 8px);
  color: #ffffff;
  content: attr(data-tooltip);
  font-size: 0.75rem;
  font-weight: 600;
  left: 50%;
  opacity: 0;
  padding: 4px 7px;
  pointer-events: none;
  position: absolute;
  text-transform: none;
  transform: translateX(-50%) translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  white-space: nowrap;
  z-index: 1000;
}

.kb-button[data-tooltip]:hover::after,
.kb-button[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.kb-button-cell .kb-button-group .kb-button[data-tooltip]::after {
  left: auto;
  right: 0;
  transform: translateY(4px);
}

.kb-button-cell .kb-button-group .kb-button[data-tooltip]:hover::after,
.kb-button-cell .kb-button-group .kb-button[data-tooltip]:focus-visible::after {
  transform: translateY(0);
}

@media (max-width: 767px) {
  .kb-button--icon {
    flex-basis: 36px;
    height: 36px;
    width: 36px;
  }

  .kb-button--wide {
    min-width: min(220px, 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .kb-button,
  .kb-button[data-tooltip]::after {
    transition: none;
  }

  .kb-button:hover,
  .kb-button:active {
    transform: none;
  }
}