/* =============================================================================
   BUTTONS - Sistema de Botões
   ============================================================================= */

/* Base Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

/* Primary Variants */
.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border-color: var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
    border-color: var(--gray-400);
}

.btn-success {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
    background: #059669;
    border-color: #059669;
}

.btn-danger {
    background: var(--danger);
    color: white;
    border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    border-color: #dc2626;
}

.btn-warning {
    background: var(--warning);
    color: var(--gray-900);
    border-color: var(--warning);
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
    border-color: #d97706;
    color: white;
}

.btn-info {
    background: var(--info);
    color: white;
    border-color: var(--info);
}

.btn-info:hover:not(:disabled) {
    background: #0284c7;
    border-color: #0284c7;
}

/* Outline Variants */
.btn-outline-primary {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

.btn-outline-secondary {
    background: transparent;
    color: var(--gray-600);
    border-color: var(--gray-300);
}

.btn-outline-secondary:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--gray-700);
}

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

.btn-outline-danger:hover:not(:disabled) {
    background: var(--danger);
    color: white;
}

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

.btn-outline-success:hover:not(:disabled) {
    background: var(--success);
    color: white;
}

/* Ghost Variants */
.btn-ghost {
    background: transparent;
    color: var(--gray-600);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--gray-700);
}

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

.btn-ghost-primary:hover:not(:disabled) {
    background: var(--primary-light);
}

.btn-ghost-danger {
    background: transparent;
    color: var(--danger);
    border-color: transparent;
}

.btn-ghost-danger:hover:not(:disabled) {
    background: #fef2f2;
}

/* Sizes */
.btn-xs {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 0.375rem;
}

.btn-xs svg {
    width: 0.875rem;
    height: 0.875rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-sm svg {
    width: 0.875rem;
    height: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-lg svg {
    width: 1.25rem;
    height: 1.25rem;
}

.btn-xl {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-xl svg {
    width: 1.5rem;
    height: 1.5rem;
}

/* Special Variants */
.btn-icon {
    padding: 0.5rem;
    width: 2.25rem;
    height: 2.25rem;
}

.btn-icon.btn-xs {
    width: 1.5rem;
    height: 1.5rem;
    padding: 0.25rem;
}

.btn-icon.btn-sm {
    width: 1.875rem;
    height: 1.875rem;
    padding: 0.375rem;
}

.btn-icon.btn-lg {
    width: 2.75rem;
    height: 2.75rem;
    padding: 0.625rem;
}

.btn-table-action {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    background: transparent;
    color: var(--gray-500);
    border: none;
    border-radius: 0.375rem;
}

.btn-table-action:hover:not(:disabled) {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-table-action.btn-edit:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.btn-table-action.btn-delete:hover {
    color: var(--danger);
    background: #fef2f2;
}

.btn-table-action.btn-view:hover {
    color: var(--info);
    background: #eff6ff;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Button Group */
.btn-group {
    display: inline-flex;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: 0.5rem 0 0 0.5rem;
}

.btn-group .btn:last-child {
    border-radius: 0 0.5rem 0.5rem 0;
}

.btn-group .btn:not(:last-child) {
    border-right: none;
}

/* Loading State */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

.btn-loading.btn-primary::after,
.btn-loading.btn-success::after,
.btn-loading.btn-danger::after,
.btn-loading.btn-info::after {
    border-color: white;
    border-right-color: transparent;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}

/* Action Buttons Container */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.action-buttons-end {
    justify-content: flex-end;
}

.action-buttons-center {
    justify-content: center;
}