/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: 1px solid;
    background: transparent;
    font-family: inherit;
    font-size: var(--font-size-controls);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 0;
}

.btn-primary,
.btn-success {
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
}

.config-actions-buttons #save-btn.btn-success,
.config-save-sticky-actions #save-btn-sticky.btn-success {
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
}

.btn-primary:hover,
.btn-success:hover {
    background-color: var(--background-secondary);
    transform: translateX(2px);
}

.config-actions-buttons #save-btn.btn-success:hover,
.config-save-sticky-actions #save-btn-sticky.btn-success:hover {
    background-color: var(--background-secondary);
    transform: translateX(2px);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
}

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

.btn-danger {
    font-size: var(--font-size-controls);
    border: 1px solid var(--accent-error);
    color: var(--accent-error);
}

.btn-danger:hover {
    background-color: var(--accent-error);
    color: var(--background-primary);
    transform: translateX(2px);
}

.btn-small {
    padding: 0.375rem 0.5rem;
    font-size: var(--font-size-text);
}

/* Disabled state */
.btn:disabled,
.btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
    background: var(--background-secondary);
    border-color: var(--border-primary);
    color: var(--text-secondary);
    transform: none;
}

/* Button loading state */
.btn.btn-loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
}

.btn.btn-loading::before {
    content: '';
    display: inline-block;
    width: 0.75em;
    height: 0.75em;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: btnSpinnerRotate 0.65s linear infinite;
    flex-shrink: 0;
}

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

/* File input button styling */
.file-input-btn {
    display: inline-block;
    cursor: pointer;
    margin-left: 0.5rem;
}