/* ==========================================================================
   Buttons Component
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn:active:not(:disabled) {
    transform: scale(0.97);
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--color-primary-focus);
}

/* Primary button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

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

.btn-primary:active:not(:disabled) {
    transform: translateY(1px);
}

/* Secondary button */
.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--text-inverse);
}

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

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

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
    border-color: var(--color-gray-400);
}

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

.btn-ghost:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Danger button */
.btn-danger {
    background-color: var(--color-error);
    color: var(--text-inverse);
}

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

/* Success button */
.btn-success {
    background-color: var(--color-success);
    color: var(--text-inverse);
}

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

/* Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

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

/* Icon button */
.btn-icon {
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
    padding: var(--spacing-xs);
}

/* Button with loading state */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-primary.btn-loading::after,
.btn-secondary.btn-loading::after,
.btn-danger.btn-loading::after,
.btn-success.btn-loading::after {
    border-color: var(--color-white);
    border-top-color: transparent;
}

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

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

.btn-group .btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

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